##### Table of Contents

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549



---

FORM 10-K

Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

For the fiscal year ended December 31, 2006

Commission File Number:
0-23363



---

AMERICAN DENTAL PARTNERS, INC.

(Exact name of registrant as specified in its charter)



---



|                                                               |  |                                     
|-------------------------------------------------------------- |  | ------------------------------------
|DELAWARE                                                       |  | 04-3297858                          
|(State or other jurisdiction of incorporation or organization) |  | (I.R.S. Employer Identification No.)

American Dental Partners, Inc.

201 Edgewater Drive, Suite 285

Wakefield, Massachusetts 01880

(Address of principal executive offices, including zip code)

Registrants telephone number, including area code: (781) 224-0880

Securities registered
pursuant to Section 12(b) of the Act:



|                              |  |                                          
|----------------------------- |  | -----------------------------------------
|Title of each class           |  | Name of each exchange on which registered
|Common Stock, $0.01 par value |  | The Nasdaq Stock Market                  

Securities registered pursuant to Section 12(g) of the Act:

None

Indicate by check mark if the registrant is a
well-known seasoned issuer, as defined in Rule 405 of the Securities Act. [    ] Yes [X] No

Indicate by check mark if the
registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. [    ] Yes [X] No

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the
registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. [X] Yes [    ] No

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of registrants knowledge, in definitive proxy or information
statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K. [    ]

Indicate by check mark
whether the registrant is a large accelerated filer, an accelerated filer, or a non-accelerated filer. See definition of accelerated filer and large accelerated filer in Rule 12b-2 of the Exchange Act. (check one)

Large accelerated filer
[    ]                Accelerated filer
[X]                Non-accelerated filer [    ]

Indicate by check mark whether the registrant is a shell company, as defined in Rule 12b-2 of the Act [    ] Yes [X] No

The
aggregate market value of the voting and non-voting common equity held by non-affiliates computed by reference to the price at which the common equity was last sold, as reported by the Nasdaq National Market System, on June 30, 2006, amounted
to $145,105,997. Shares of voting stock held by each officer and director and by each person who owns 10% or more of the outstanding voting stock have been excluded, in that such person may be deemed to be affiliates. This determination of affiliate
status is not necessarily a conclusive determination for other purposes.

There were 12,457,677 shares outstanding of the issuers Common Stock, $0.01
par value, at March 5, 2007.

DOCUMENTS INCORPORATED BY REFERENCE

Portions of the registrants definitive Proxy Statement for its 2007 Annual Meeting of Stockholders to be filed pursuant to Regulation 14A are incorporated by reference in Part III, Items 10, 11, 12, 13, and 14
of this Annual Report on Form 10-K.



---

##### Table of Contents

AMERICAN DENTAL PARTNERS, INC.

INDEX



|                                                 |  |                                                                                                                  |  |     
|------------------------------------------------ |  | ---------------------------------------------------------------------------------------------------------------- |  | ----
|                                                 |  |                                                                                                                  |  | Page
|Information Regarding Forward-looking Statements |  | 3                                                                                                               
|                                                 | 
|PART I.                                          |  |                                                                                                                 
|Item 1.                                          |  | Business                                                                                                         |  | 3   
|Item 1A.                                         |  | Risk Factors                                                                                                     |  | 16  
|Item 1B.                                         |  | Unresolved Staff Comments                                                                                        |  | 18  
|Item 2.                                          |  | Properties                                                                                                       |  | 18  
|Item 3.                                          |  | Legal Proceedings                                                                                                |  | 19  
|Item 4.                                          |  | Submission of Matters to a Vote of Security Holders                                                              |  | 19  
|                                                 | 
|PART II.                                         |  |                                                                                                                 
|Item 5.                                          |  | Market for the Registrants Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities |  | 20  
|Item 6.                                          |  | Selected Financial Data                                                                                          |  | 22  
|Item 7.                                          |  | Managements Discussion and Analysis of Financial Condition and Results of Operations                            |  | 24  
|Item 7A.                                         |  | Quantitative and Qualitative Disclosures about Market Risk                                                       |  | 36  
|Item 8.                                          |  | Financial Statements and Supplementary Data                                                                      |  | 37  
|Item 9.                                          |  | Changes in and Disagreements with Accountants on Accounting and Financial Disclosure                             |  | 68  
|Item 9A.                                         |  | Controls and Procedures                                                                                          |  | 68  
|Item 9B.                                         |  | Other Information                                                                                                |  | 68  
|                                                 | 
|PART III.                                        |  |                                                                                                                 
|Item 10.                                         |  | Directors, Executive Officers and Corporate Governance of the Registrant                                         |  | 69  
|Item 11.                                         |  | Executive Compensation                                                                                           |  | 69  
|Item 12.                                         |  | Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters                   |  | 69  
|Item 13.                                         |  | Certain Relationships and Related Transactions, and Director Independence                                        |  | 69  
|Item 14.                                         |  | Principal Accounting Fees and Services                                                                           |  | 69  
|                                                 | 
|PART IV.                                         |  |                                                                                                                 
|Item 15.                                         |  | Exhibits, Financial Statement Schedules                                                                          |  | 70  



2



---

##### Table of Contents

INFORMATION REGARDING FORWARD-LOOKING STATEMENTS

Some of the information in this Annual Report on Form 10-K contains
forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. The words believe, expect, anticipate, project, and similar expressions, among others,
identify forward-looking statements. Forward-looking statements speak only as of the date the statement was made. Such forward-looking statements are subject to uncertainties and other factors that could cause actual results to differ materially
from those projected, anticipated or implied. Certain factors that might cause such a difference include, among others, the Companys risks associated with overall or regional economic conditions, contracts its affiliated practices have with
third-party payors and the impact of any terminations or potential terminations of such contracts, fluctuations in labor markets, the Companys acquisition and affiliation strategy, dependence upon affiliated dental practices, dependence upon
service agreements, outcome of pending litigation, and government regulation of the dental industry. Additional risks, uncertainties and other factors are described in Item 1A.

PART I

As used in this Annual Report, unless otherwise indicated, the terms the Company, we,
us and our refer to American Dental Partners, Inc. and its wholly-owned subsidiaries. The term practice or dental group practice refers to a dentist-owned professional corporation, professional
association or service corporation which is responsible for providing dental care to patients. An affiliated practice or an affiliated dental practice is a professional corporation, professional association or service
corporation which is not owned by us that has entered into a long-term service agreement with us. An affiliated dental group is comprised of an affiliated practice and a Company-owned service company entity which have entered into a
long-term service agreement. An affiliated dental group typically comprises several dental facilities in a given metropolitan market. The terms affiliated practice, affiliated dental practice and affiliated dental
group also include Arizonas Tooth Doctor for Kids, a corporation that is 85% owned by us and, as permitted by applicable state law, employs dentists. Consequently, there is no service agreement between Arizonas Tooth Doctor for
Kids and us (see Item 1. Business - Arizonas Tooth Doctor for Kids.)

ITEM 1.  BUSINESS

Overview

American Dental Partners is a leading provider of business services to multidisciplinary dental group practices in selected markets throughout the United States. We are committed to the growth and success of the
affiliated practices, and we make substantial investments to support each affiliated practices growth. We provide or assist with organizational planning and development; recruiting, retention and training programs; quality assurance
initiatives; facilities development and management; employee benefits administration; procurement; information systems and practice technology; marketing and payor relations; and financial planning, reporting and analysis. At December 31, 2006,
we were affiliated with 22 dental group practices, comprising 470 full-time equivalent dentists practicing in 209 dental facilities in 18 states. We were incorporated in Delaware in 1995.

Dental Care Industry

The market for dental care is large, growing
and highly fragmented. Based on Centers for Medicare & Medicaid Services statistics, estimated expenditures for dental care grew 7% annually from 1990 to 2005 reaching $87 billion in 2005 and are expected to be approximately $167 billion by
2015, representing a 7% annual growth rate from 2005 to 2015. We believe that the growth in expenditures for dental care will continue to be driven by both increases in costs and increases in demand for services due to:



| |  |  | increased enrollment in dental benefits plans, particularly preferred provider organization (PPO) plans, and to a lesser extent, dental referral plans;
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------

| |  |  | increased demand for dental care as a result of the aging population and a greater percentage of the population retaining its dentition; and
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------



3



---

##### Table of Contents

| |  |  | increased demand for aesthetic dental procedures as a result of an increasing awareness of personal appearance and the development of new dental materials and
procedures which address these desires.
| | - |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

We believe that this growth will benefit not only dentists, but companies that provide services
to the dental care industry, including dental management service organizations. However, the failure of any of these factors to materialize could offset increases in demand for dental care, and any such increases may not correlate with growth in our
business.

Unlike many other sectors of the health care services industry, the dental care profession remains dominated by practices owned and operated by
just one dentist. According to the American Dental Association (ADA), in 2003, approximately 63% of the 160,000 dentists in the United States were solo practitioners. The percentage of graduating dentists who initially began their career
as an owner of a dental practice, however, fell from 31% in 1989 to 19% in 2004 according to the ADA. We believe a greater percentage of dentists will practice as partners or associates in group dental practices rather than practicing as a solo
practitioner as a result of high educational debt levels and a change in gender profile of graduating dentists. According to the ADA, dental students in 2004 graduated with an average of $200,000 of debt and 41% were female. Group dental practice
provides economic and professional flexibility advantages to graduating dentists as compared to solo practice.

Most dental care performed in the United
States is categorized as general dentistry. According to the ADA, in 2004, approximately 79% of dentists were general dentists. General dentistry includes preventative care, diagnosis and treatment planning, as well as procedures such as fillings,
crowns, bridges, dentures and extractions. Specialty dentistry, which includes endodontics, oral surgery, orthodontics, periodontics, prosthodontics and pediatric dentistry, represented the remaining 21% of practicing dentists.

Historically, dental care was not covered by insurers and consequently was paid for by patients on a fee-for-service basis. An increasing number of employers have
responded to the desire of employees for enhanced benefits by providing coverage from third-party payors for dental care. These third-party payors offer indemnity insurance plans, PPO plans, capitated managed care plans and dental referral plans.
Under an indemnity insurance plan, the dental provider charges a fee for each service provided to the insured patient, which is typically the same as that charged to a patient not covered by any type of dental insurance. We categorize indemnity
insurance plans as fee-for-service plans. Under a PPO plan, the dentist charges a discounted fee for each service provided based on a schedule negotiated with the dental benefit provider. Under a capitated managed care plan, the dentist receives a
fixed monthly fee from the managed care organization for each member covered under the plan who selects that dentist as his or her provider. Capitated managed care plans also typically require a co-payment by the patient. Dental referral plans are
not insurance products but are network-based products that provide access to dental care. Typically, a small monthly fee is paid by an individual or employer for a list of dentists who have agreed to accept certain negotiated fees or a discount from
their normal fees. Under dental referral plans, full reimbursement for dental care provided is made directly by a patient to the participating dentist, as compared to indemnity, PPO and capitation plans in which some level of reimbursement is
provided by the payor to the participating dentist. We categorize dental referral plans as PPO plans.

The National Association of Dental Plans
(NADP) and the Delta Dental Plans Association (DDPA) estimated that 163 million people, or 55% of the population of the United States, were covered by some form of dental benefit plan in 2005. This compares with
133 million people, or 52% of the population, in 1996. Of the 163 million people with coverage, 49% were covered by PPO plans, 21% by indemnity insurance plans, 11% by publicly funded benefits such as Medicaid, 9% by capitated managed care
plans, 8% by dental referral plans and about 1% in direct reimbursement plans. The NADP and DDPA estimate that nearly 166 million people will be enrolled in a dental benefit plan in 2007. The number of people covered by PPO plans increased from
21 million in 1996 to 80 million in 2005.

Business Objective and Strategy

Our objective is to be the leading business partner to dental group practices in selected markets throughout the United States. In order to achieve our objective, our strategy is to provide value-added resources and
support to



4



---

##### Table of Contents

each affiliated practice so that each may become the market leading, high quality dental provider in its community. We believe the core attributes of a
leading dental group include the following: (i) a common identity and clinical philosophy, (ii) professional recruiting and mentoring programs, (iii) formalized peer review and quality assurance initiatives, (iv) functional and
well-maintained dental facilities, (v) advanced information systems and (vi) a qualified local management team with well-defined responsibilities and accountability.

In executing our strategy, we provide or assist the affiliated practices with organizational planning and development; recruiting, retention and training programs; quality assurance initiatives; facilities development
and management; employee benefits administration; procurement; information systems; marketing and payor relations; and financial planning, reporting and analysis. In order to execute our strategy successfully we are continually enhancing or
expanding our capabilities and resources, including vertical integration of ancillary activities.

We believe that successful execution of our strategy
will result in growth from the following areas: (i) assisting affiliated practices to increase their community presence, (ii) affiliating with dental group practices in new communities and (iii) adding additional capabilities or
resources to our service offering through the acquisition or development of related businesses. Our objective is to help the affiliated practices grow their patient revenue 8 to 10% annually and to supplement our growth through completion of
additional affiliations in new communities. We are constantly evaluating potential affiliations with dental group practices that would expand our business, as well as possible acquisitions of companies that would broaden our business capabilities.
Although we have completed many successful practice affiliations and business acquisitions, there can be no assurance that additional affiliation or acquisition candidates can be identified or that they can be consummated or successfully integrated
into our operations.

Affiliation Philosophy

We
believe that dental care is an important part of an individuals overall health care. Because the practitioner is best qualified to manage the clinical aspects of dentistry, the provision of dental care must be centered around the dentist.
However, current market trends in health care are increasing the complexity of operating a dental group practice. In addition, the principals of many dental group practices are reaching retirement age and are beginning to investigate means for
transitioning the non-clinical leadership and management of their dental group practices. Consequently, many are engaging professional consultants to assist with these complexities and challenges, and in certain instances are choosing to affiliate
with dental management service organizations that can manage the non-clinical aspects of dentistry and provide the necessary organizational structure, resources and capital for continued growth and success.

We believe that, similar to other sectors of the health care delivery system, the delivery of dental care is fundamentally a local business. Therefore, each affiliated
dental group maintains its local identity and operating philosophy. In each affiliation, we strive to maintain the local culture of the affiliated dental group, and we encourage it to continue using the same name, continue its presence in community
events, maintain its relationship with patients and local dental benefit providers and maintain and strengthen the existing management organization.

Our
affiliation model is designed to create a partnership in management between the affiliated practice and us that allows each party to maximize its strengths and retain its autonomy. We believe the core values of a management partnership are shared
governance and shared financial objectives, and we have structured our affiliation model to achieve these goals. Shared governance is achieved by the formation of a joint policy board for each affiliated dental group which is comprised of an equal
number of representatives from the affiliated practice and us. Together, members of the joint policy board develop strategies and decide on major business initiatives. Shared financial objectives are achieved through the joint implementation of an
annual planning process that establishes the financial performance standards for the affiliated dental group, including the affiliated practice and us. Under our business model, the dentists continue to have sole and complete discretion over
clinical decision-making while we manage the business aspects of the affiliated practice.



5



---

##### Table of Contents

Affiliated Dental Groups

From November 1996 (the date of our first affiliation) through December 31, 2006, we have completed 72 acquisition and affiliation transactions, which now comprise 22 affiliated dental groups in 18 states. The following table lists our
affiliated dental groups as of December 31, 2006.



|                                     |  |  |  |                       |  |  |  |                  |  |  |  |                 |  |  |  |                          |  |              |   |             |  |               |  |              |   |               |  |                 |  |  |   |  |  |   | 
|------------------------------------ |  |  |  | --------------------- |  |  |  | ---------------- |  |  |  | --------------- |  |  |  | ------------------------ |  | ------------ | - | ----------- |  | ------------- |  | ------------ | - | ------------- |  | --------------- |  |  | - |  |  | - | 
|                                     |  |  |  |                       |  |  |  |                  |  |  |  |                 |  |  |  | Practice Specialties (2)
|Affiliated Dental Group              |  |  |  | State                 |  |  |  | DentalFacilities |  |  |  | Operatories (1) |  |  |  | General                  |  | Endo-dontics |   | OralSurgery |  | Ortho-dontics |  | Pedo-dontics |   | Perio-dontics |  | Prosth-odontics
|1st Advantage Dental - New England   |  |  |  | Massachusetts/Vermont |  |  |  | 5                |  |  |  | 38              |  |  |  | ü                        |  |              |   |             |  |               |  |              |   |               |  |                 |  |  |   |  |  |   | 
|1st Advantage Dental - New York      |  |  |  | New York              |  |  |  | 8                |  |  |  | 62              |  |  |  | ü                        |  |              | ü |             |  | ü             |  |              |   |               |  |                 |  |  | ü |  |  |   | 
|American Family Dentistry            |  |  |  | Tennessee             |  |  |  | 8                |  |  |  | 54              |  |  |  | ü                        |  |              |   |             |  |               |  |              | ü |               |  |                 |  |  |   |  |  |   | 
|Arizonas Tooth Doctor for Kids      |  |  |  | Arizona               |  |  |  | 6                |  |  |  | 68              |  |  |  | ü                        |  |              |   |             |  |               |  |              | ü |               |  | ü               |  |  |   |  |  |   | 
|Associated Dental Care Providers (3) |  |  |  | Arizona               |  |  |  | 15               |  |  |  | 148             |  |  |  | ü                        |  |              |   |             |  |               |  |              | ü |               |  |                 |  |  |   |  |  |   | 
|Assure Dental                        |  |  |  | Minnesota             |  |  |  | 2                |  |  |  | 6               |  |  |  | ü                        |  |              |   |             |  |               |  |              |   |               |  |                 |  |  |   |  |  |   | 
|Chestnut Hills Dental                |  |  |  | Pennsylvania          |  |  |  | 8                |  |  |  | 56              |  |  |  | ü                        |  |              |   |             |  | ü             |  |              | ü |               |  |                 |  |  | ü |  |  |   | 
|Cumberland Dental (3)                |  |  |  | Alabama               |  |  |  | 3                |  |  |  | 31              |  |  |  | ü                        |  |              |   |             |  | ü             |  |              | ü |               |  |                 |  |  | ü |  |  |   | 
|Deerwood Orthodontics (4)            |  |  |  | Wisconsin             |  |  |  | 6                |  |  |  | 29              |  |  |  |                          |  |              |   |             |  |               |  |              | ü |               |  |                 |  |  |   |  |  |   | 
|Dental Arts Center                   |  |  |  | Virginia              |  |  |  | 1                |  |  |  | 39              |  |  |  | ü                        |  |              | ü |             |  | ü             |  |              | ü |               |  | ü               |  |  | ü |  |  | ü | 
|Forward Dental (3)(4)                |  |  |  | Wisconsin             |  |  |  | 24               |  |  |  | 241             |  |  |  | ü                        |  |              | ü |             |  |               |  |              |   |               |  | ü               |  |  | ü |  |  |   | 
|Greater Maryland Dental Partners     |  |  |  | Maryland              |  |  |  | 5                |  |  |  | 66              |  |  |  | ü                        |  |              | ü |             |  | ü             |  |              | ü |               |  | ü               |  |  | ü |  |  |   | 
|Lakeside Dental Care                 |  |  |  | Louisiana             |  |  |  | 2                |  |  |  | 31              |  |  |  | ü                        |  |              |   |             |  |               |  |              | ü |               |  |                 |  |  | ü |  |  |   | 
|Longhorn Dental Associates (3)       |  |  |  | Texas                 |  |  |  | 18               |  |  |  | 144             |  |  |  | ü                        |  |              |   |             |  | ü             |  |              | ü |               |  |                 |  |  |   |  |  |   | 
|Oklahoma Dental Group                |  |  |  | Oklahoma              |  |  |  | 6                |  |  |  | 48              |  |  |  | ü                        |  |              | ü |             |  |               |  |              | ü |               |  |                 |  |  | ü |  |  |   | 
|Orthodontic Care Specialists (3)     |  |  |  | Minnesota             |  |  |  | 20               |  |  |  | 103             |  |  |  |                          |  |              |   |             |  |               |  |              | ü |               |  |                 |  |  |   |  |  |   | 
|Park Dental                          |  |  |  | Minnesota             |  |  |  | 31               |  |  |  | 327             |  |  |  | ü                        |  |              | ü |             |  | ü             |  |              |   |               |  | ü               |  |  | ü |  |  | ü | 
|Premier Dental Partners              |  |  |  | Missouri              |  |  |  | 6                |  |  |  | 60              |  |  |  | ü                        |  |              |   |             |  |               |  |              |   |               |  |                 |  |  | ü |  |  |   | 
|Redwood Dental Group                 |  |  |  | Michigan              |  |  |  | 6                |  |  |  | 76              |  |  |  | ü                        |  |              |   |             |  |               |  |              | ü |               |  |                 |  |  | ü |  |  |   | 
|Riverside Dental Group (3)           |  |  |  | California            |  |  |  | 6                |  |  |  | 116             |  |  |  | ü                        |  |              | ü |             |  | ü             |  |              | ü |               |  | ü               |  |  | ü |  |  | ü | 
|University Dental Associates (3)(5)  |  |  |  | North Carolina        |  |  |  | 11               |  |  |  | 97              |  |  |  | ü                        |  |              |   |             |  | ü             |  |              | ü |               |  |                 |  |  |   |  |  |   | 
|Western New York Dental Group (3)    |  |  |  | New York              |  |  |  | 12               |  |  |  | 104             |  |  |  | ü                        |  |              |   |             |  |               |  |              | ü |               |  | ü               |  |  | ü |  |  |   | 
|                                     |  |  |  |                       |  |  |  |                  |  |  |  |                 |  |  |  |                          |  |              |   |             |  |               |  |              |   |               |  |                 |  |  |   |  |  |   | 
|                                     |  |  |  |                       |  |  |  | 209              |  |  |  | 1,944           |  |  |  |                          |  |              |   |             |  |               |  |              |   |               |  |                 |  |  |   |  |  |   | 
|                                     |  |  |  |                       |  |  |  |                  |  |  |  |                 |  |  |  |                          |  |              |   |             |  |               |  |              |   |               |  |                 |  |  |   |  |  |   | 

(1) An operatory is an area where dental care is performed and generally contains a dental chair, a hand piece
delivery system and other essential dental equipment.

(2) Services provided by specialists who are board-certified or board-eligible.

(3) Accredited by the Accreditation Association for Ambulatory Health Care (AAAHC).

(4) On April 1, 2006, we affiliated with Deerwood Orthodontics. As part of the transaction our existing affiliate, Forward Dental, contributed its orthodontic practice to Deerwood Orthodontics.

(5) University Dental Associates dental residency program is accredited by the American Dental Association.

Operations

Operating Structure

Where permitted by applicable state law, we generally employ the hygienists, dental assistants and administrative staff at each dental facility, but all clinical
activities are performed under the supervision of the dentists who are employed by or contracted with an affiliated practice. Each dental facility has a manager who, along with the administrative staff, typically oversees the day-to-day business
operations, including facility staffing, patient scheduling, on-site patient billing and ordering office and dental supplies. Each affiliated dental group has a director of operations who oversees all the managers of the dental facilities of a
particular affiliated dental group.

Our shared services teams provide administrative and operational support to one or more affiliated dental groups on
either a national, regional or local basis. These teams provide or assist in organizational planning and development; recruiting, hiring and training programs; administering employee benefits and processing payroll; maintaining information systems;
developing annual operating plans; producing accounting and financial reporting information; developing and maintaining facilities; and marketing. As smaller affiliated dental groups grow in size, they may add local resources to assume some of the
support functions provided by shared services teams.

A senior regional operations director is responsible for monitoring the operating performance of
multiple affiliated dental groups in multiple communities. Each senior regional operations director participates as a



6



---

##### Table of Contents

member of the joint policy board of each of the affiliated dental groups for which he or she has oversight responsibilities. The senior regional operations
directors are responsible for overseeing the development of annual operating plans and monitoring actual results.

Professional Leadership Forum

We have organized the Professional Leadership Forum to facilitate sharing of information among the affiliated practices. Lead dentists from the
affiliated practices participate in the Professional Leadership Forum. The Professional Leadership Forum meets on a national and regional basis each year and provides a forum for dentists to share the best clinical, operational and organizational
leadership practices of their respective affiliated dental group practices and provides an opportunity to build professional relationships with other dental group practices affiliated with us. These dentists, as a result of their affiliation with
us, share common long-term goals. This enables the discussion at the Professional Leadership Forum to be more open than it may be with other professional dental organizations. While the primary emphasis of the Professional Leadership Forum is on the
leadership aspects of dentistry, it also provides our management an opportunity to continue to build and enhance relationships with the affiliated practices.

Accreditation Association for Ambulatory Health Care

We have selected the Accreditation Association for Ambulatory Health Care
(AAAHC) as a means for supporting the quality initiatives of the affiliated dental groups. The AAAHC is a peer-based, not-for-profit organization that is nationally recognized for conducting extensive evaluations of ambulatory health
care organizations. The AAAHC evaluates a number of areas in granting accreditation, such as patients rights, governance, administration, clinical records, professional development, quality management and improvement and facilities. We work
with the affiliated practices to achieve accreditation. Depending on the level of development and organization, achieving accreditation can take several years of preparation. Currently, eight affiliated practices have achieved accreditation status
from the AAAHC.

Training and Leadership Development

We believe that our long term success requires a significant investment in the development of people at all levels within the Company and at the affiliated practices. We have both leadership development and skills training programs.

The American Dental Partners Leadership Institute provides both personal and professional development by bringing dentists and management leaders together
to develop effective leadership techniques to create work environments that inspire peak performance from team members. The Leadership Institute is conducted on a national basis with dentists and management from multiple affiliated dental groups in
attendance. As part of the learning process, participants receive feedback on the climate they create, their leadership styles and their leadership competencies. Feedback is obtained from the leaders team members through on-line assessment
surveys. Survey results are shared with the leader during the program, and personal action plans are created to enhance leadership effectiveness. Creating a high performance climate improves morale, lowers staff turnover and improves productivity.

We have also devoted significant resources to develop innovative, proprietary skills training programs. Training programs exist for improving patient
service, such as creating the perfect patient arrival/departure experience, improving telephone etiquette and managing unhappy patients, and developing business management competencies, such as improving recruiting skills, developing effective
mentoring processes and managing time. The programs are modular and are made available at the affiliated dental groups. We assist the affiliated dental groups in selecting a local team member who is responsible for implementing and maintaining
continuous training and development programs. Once implemented, the affiliated dental groups have on-going sessions with additional modules as they are developed and with new staff members as they join the dental group. We believe that by investing
in skills training, we empower our team members to assist the affiliated practices in providing exceptional patient care and service.



7



---

##### Table of Contents

Payor Relationships and Reimbursement Mix

Although we believe that the clinical philosophy of each affiliated practice should not be compromised by economic decisions, we recognize that the source of payment for services affects operating and financial
performance. Generally, we believe it is easier to grow patient revenue within a given community when the payor mix of the affiliated practice is aligned with the payor mix in that community. We help the affiliated practices optimize their revenue
by analyzing their payor mix on an ongoing basis, as well as providing assistance with evaluating and negotiating their dental benefit provider contracts for improved reimbursement rates.

We believe it is advantageous to be affiliated with dental group practices that have successfully provided care to patients under all reimbursement methodologies. Since
a shift is taking place in the dental benefits market from capitated managed care plans to PPO plans and dental referral plans, we believe that experience in operating under all of these plans provides an advantage as it relates to increasing
community presence. Most of the affiliated practices provide care under traditional fee-for-service plans and non-fee-for-service plans. The following table provides the aggregate payor mix of the affiliated practices for the years ended
December 31:



|                              |  |      |  |      |  |     
|----------------------------- |  | ---- |  | ---- |  | ----
|                              |  | 2006 |  | 2005 |  | 2004
|Fee-for-service               |  | 31%  |  | 34%  |  | 37% 
|PPO and dental referral plans |  | 52%  |  | 48%  |  | 43% 
|Capitated managed care plans  |  | 17%  |  | 18%  |  | 20% 

In recent years, many of the affiliated practices have been realigning their reimbursement mix away from deeply
discounted dental benefit plans which has resulted in a decrease in capitated managed care plans and an increase in PPO plans. This realignment has largely been accomplished with the cooperation of the dental benefit provider community in general.
There can be no assurance, however, that the continued shift in reimbursement mix will not result in the termination of certain third-party payor contracts between the affiliated practices and dental benefit providers that adversely impact our
business, financial condition or results of operations.

Facilities Development and Management

The affiliated practices operate out of dental facilities that in most instances we lease from third-parties under long-term operating leases. Generally, each of our 209
dental facilities is constructed to be warm, attractive and inviting to patients and typically has between eight and ten operatories or treatment rooms, which accommodate general and specialty dentists, hygienists and dental assistants as well as
required support staff. Most of the dental facilities are either free-standing locations or are located within a professional office or medical building.

We assist the affiliated dental groups in improving facility utilization by evaluating existing capacity, identifying expansion opportunities and prioritizing facility upgrades. We acquire or construct each dental facility as appropriate
for the local community and add or equip additional operatories to meet increases in demand. We use architectural design services to improve facility design by working with each affiliated dental group to establish defined facility standards. These
standards are developed to meet the needs of each affiliated dental group, while creating a consistency across new dental facilities which shortens the site development process and improves productivity of dentists and support staff.

During 2005, we introduced a new investment model for developing de novo dental facilities which are smaller and have a significant amount of portable or easily
relocated equipment. We believe this new model will reduce the risk inherent in de novo facility development. As of December 31, 2006, we had completed four of these de novo facilities and we expect to develop eight de novo facilities in 2007.

Financial Planning and Financial Information System

We assist the affiliated dental groups with financial planning. In conjunction with each affiliated practice, we develop an annual operating plan for the affiliated dental group which sets specific goals for revenue growth, operating
expenses and capital expenditures. Once a plan has been approved by the joint policy board, we measure forecasted and actual financial performance of each affiliated dental group against the annual operating plan.



8



---

##### Table of Contents

Our financial information system enables us to measure, monitor and compare the financial performance of each affiliated
dental group on a standardized basis. The system also allows us to track and control costs and facilitates the accounting and financial reporting process. This financial system is used with all affiliated dental groups.

Practice Management Systems

The affiliated dental groups use
various dental practice management software systems to facilitate patient scheduling, bill patients and insurance companies, assist with facility staffing and for other practice related activities. In connection with our affiliation with Park
Dental, we acquired the rights to Comdent, a practice management system designed for use by multi-specialty dental groups. Comdent has been used continuously at Park Dental since 1987 and continuously enhanced by us since 1996. As of
December 31, 2006, Comdent was in use at ten of the affiliated dental groups. Five of the affiliated dental groups use commercially available practice management systems.

Since 2002,we have been developing Improvis, a proprietary practice management system intended to replace Comdent. Improvis has been designed to include expanded clinical, managerial and financial
capabilities. Future phases of Improvis will include electronic dental record, digital radiography, time keeping and orthodontic practice management functionality. In 2007, we intend to pilot our electronic dental record system and integrate it with
digital radiography and intra/extra-oral digital imaging. As of December 31, 2006, six affiliated dental groups had implemented Improvis at all dental facilities and one affiliate had begun to implement Improvis. We intend to implement Improvis
at several more affiliated dental groups in 2007. There can be no assurance, however, that we will successfully implement Improvis at additional dental groups during 2007, that Improvis will function satisfactorily on a large scale or that all
phases of the system will be successfully developed.

Orthodontic Care Specialists, an affiliated dental group which exclusively provides orthodontic
services, utilizes a proprietary practice management system designed specifically for the unique requirements of the orthodontics specialty. We have implemented this orthodontic practice management system at Deerwood Orthodontics and twelve
affiliated dental groups which have a significant orthodontics practice. We intend to implement this system at additional affiliated dental groups in 2007.

Service Agreements and Affiliation Structure

Except for Arizonas Tooth Doctor for Kids (see Item 1. Business - Arizonas
Tooth Doctor for Kids), we have entered into a service agreement with each affiliated practice pursuant to which we are responsible for managing all administrative, non-clinical aspects of the dental practice. We anticipate that each new
dental practice with which we affiliate will enter into a similar service agreement or become a party to an existing service agreement at the time of affiliation with us. We are dependent on our service agreements for the vast majority of our net
revenue. The termination of one or more of our service agreements could have a material adverse effect on us.

Pursuant to the service agreement, the
affiliated practice is solely responsible for all clinical aspects of the dental operations of the affiliated dental group. These clinical aspects include recruiting and hiring dentists, selecting, training and supervising other licensed dental
personnel and unlicensed dental assistants, providing dental care, implementing and maintaining quality assurance and peer review programs, setting patient fee schedules, entering into dental benefit plan provider contracts and maintaining
professional and comprehensive general liability insurance covering the affiliated practice and each of its dentists. We do not assume any authority, responsibility, supervision or control over the provision of dental care to patients. The service
agreement also includes non-competition and confidentiality provisions which prohibit the affiliated practice from owning or operating another dental facility, or having any interest in any business which competes with us, within the contractually
agreed upon service territory.

Pursuant to the service agreement, we are responsible for providing all services necessary and appropriate for the
administration of the non-clinical aspects of the affiliated dental group. These services include assisting with organizational planning and development; providing recruiting, retention and training programs; supporting



9



---

##### Table of Contents

quality assurance initiatives; providing on-going facilities development and maintenance; administering employee benefits and payroll; procuring supplies and
other necessary resources; maintaining necessary information systems; assisting with marketing and payor relations; and providing financial planning, reporting and analysis. As mandated by the service agreement, we along with each affiliated
practice establish a joint policy board which is responsible for developing and implementing management and administrative policies. The joint policy board consists of an equal number of representatives designated by us and the affiliated practice.
The joint policy board members designated by the affiliated practice must be licensed dentists currently employed by the practice. The joint policy boards responsibilities include the review and approval of the long-term strategic and
short-term operational goals, objectives, and plans for the dental facilities, all annual capital and operating plans, all renovation and expansion plans and capital equipment expenditures with respect to the dental facilities, all advertising and
marketing services, and staffing plans regarding provider and support personnel. The joint policy board also reviews and monitors the financial performance of the affiliated dental group, including the affiliated practice. The joint policy board
also has the authority to approve or disapprove any merger or combination with, or acquisition of, any dental practice by the affiliated practice. Finally, the joint policy board reviews and makes recommendations with respect to contractual
relationships with dental benefit providers, as well as patient fee schedules, although these and all other clinical decisions, as enumerated above, remain the exclusive decision of the affiliated practice through its joint policy board members.

The affiliated practices reimburse us for actual expenses incurred on their behalf in connection with the operation and administration of the dental
facilities and pay fees to us for management services provided and capital committed. Under certain service agreements, our service fee consists entirely of a fixed monthly fee determined by agreement between us and the affiliated practice in a
formal annual planning process. Under certain service agreements, our service fee consists of a monthly fee equal to the prior year service fee and an additional performance fee based upon a percentage of the increase of the amount by which the
affiliated practices patient revenue exceeds expenses as compared to the prior year. In no event, however, under these service agreements will the total service fee be greater than the affiliated practices patient revenue less expenses.
Under certain service agreements, our service fee consists of a monthly fee which is based upon a specified percentage of the amount by which the affiliated practices patient revenue exceeds expenses. Under a certain service agreement our
service fee consists of a fixed monthly fee and an additional performance fee based upon a percentage of the amount by which the affiliated practices patient revenue exceeds expenses as compared to the planned amount of the current year. The
structure of the service fee, whether comprised of variable, fixed and variable or fixed components, is dependent in part on laws of each state in which we operate. The affiliated practice is also responsible for provider expenses, which generally
consist of the salaries, benefits and certain other expenses of the dentists.

Pursuant to the terms of the service agreements, we bill patients and
third-party payors on behalf of the affiliated practices. Such funds, as collected, are applied in the following order of priority:



| |  |  | reimbursement of expenses incurred by us in connection with the operation and administration of the dental facilities;
| | - |  | ----------------------------------------------------------------------------------------------------------------------

| |  |  | repayment of advances, if any, made by us to the affiliated practice;
| | - |  | ---------------------------------------------------------------------

| |  |  | payment of monthly service fee to us;
| | - |  | -------------------------------------

| |  |  | payment of provider expenses; and
| | - |  | ---------------------------------

| |  |  | payment of the additional variable service fee, if applicable, to us.
| | - |  | ---------------------------------------------------------------------

Our service agreements have an initial term of 40 years and automatically renew for successive five-year terms, unless terminated by notice given at least 120 days prior to the end of the initial term or any renewal
term. In addition, the service agreement may be terminated earlier by either party upon the occurrence of certain events involving the other party, such as dissolution, bankruptcy, liquidation or our failure, which continues through the applicable
notice and cure period, to perform material duties and obligations under the service agreement. In the event a service agreement is terminated, the affiliated practice is required to reimburse us for unpaid expenses incurred in connection with the
operation and administration of the dental facilities, repay advances and pay us for unpaid service fees. In addition, the affiliated practice may be required, at our option in nearly all instances,



10



---

##### Table of Contents

to purchase the unamortized balance of intangible assets at the current book value, repurchase equipment and other assets at the greater of fair value or
book value and assume our leases and other liabilities related to the terminated service agreement.

Arizonas Tooth Doctor for Kids

Effective December 1, 2006, we completed the acquisition of the assets of Arizonas Tooth Doctor for Kids (Tooth Doctor). The
assets of Tooth Doctor were contributed to a newly-created subsidiary which is owned 85% by the Company. As permitted by applicable state law, our 85%-owned subsidiary employs the dentists. Tooth Doctor is a dental group practice which provides
dental care to children through six locations in metropolitan Phoenix and Globe, Arizona, and approximately 89% of the groups revenue is derived from PPO health plans that are contracted with the Arizona Health Care Cost Containment System
(AHCCCS), the states Medicaid program. While we employ the Tooth Doctor dentists, we do not exercise control over, or otherwise influence, their clinical judgment, decisions or practice.

Competition

The dental services industry is highly competitive.
There are approximately nineteen competing dental management companies in our current service areas that provide business services to dentists and dental group practices through contractual arrangements. The principal factors of competition between
dental management companies are their affiliation models, the number and reputation of their existing affiliated practices, their management expertise, the quality of support services provided to the affiliated practices and their financial track
record and financial soundness. We believe we compete effectively with other companies that provide business services to dental practices with respect to these factors. The dental practices affiliated with us compete with other dental group
practices and individual dentists in their respective communities.

Government Regulation

General

The practice of dentistry is highly regulated, and our
operations and those of the affiliated practices are subject to numerous state and federal laws and regulations. Furthermore, we may become subject to additional laws and regulations as we expand into new states. There can be no assurance that the
regulatory environment in which we and the affiliated practices operate will not change significantly in the future. Our ability to operate profitably will depend, in part, upon us and the affiliated practices obtaining and maintaining all necessary
licenses, certifications and other approvals and operating in compliance with applicable laws. We structure our business, operations and contractual relationships in a manner intended to comply with applicable law, but there can be no assurance that
applicable laws will not change and will be interpreted in a manner consistent with our interpretation and intent. In light of this, our service agreements provide that if there is any change in any law, regulation, rule or policy, or any ruling or
interpretation by any court or other governing body, that materially and adversely affects, or is reasonably likely to affect, the way in which either party is to perform or be compensated under the service agreement, or which makes the service
agreement unlawful, then the parties are obligated to use their best efforts to revise their relationship in a way that complies with the applicable regulatory change or ruling and approximates as closely as possible the economic positions of the
parties prior to that change or ruling.

State Regulation

Each state imposes licensing and other requirements on dentists. The laws of almost all states in which we currently operate prohibit, either by specific statutes, case law or as a matter of general public policy, entities not wholly owned
or controlled by dentists, such as American Dental Partners, from practicing dentistry, employing dentists and, in certain circumstances, dental assistants and hygienists, exercising control over the provision of dental services, splitting fees or
receiving fees for patient referrals. Many states prohibit or restrict the ability of a person other than a licensed dentist to own, manage or control the assets, equipment or facilities used by a dental



11



---

##### Table of Contents

practice. However, the laws of Arizona permit us to own the dental practice and employ the dentists at Tooth Doctor. The laws of some states prohibit the
advertising of dental services under a trade or corporate name and require all advertisements to be in the name of a dentist. A number of states also regulate the content of advertisements of dental services and the use of promotional gift items.
These laws and their interpretation vary from state to state and are enforced by regulatory authorities with broad discretion.

Many states laws and
regulations relating to the practice of dentistry were adopted prior to the emergence of providers of business services to dental group practices like us. As a result, a number of states, including states in which we currently operate, are in the
process of reviewing and/or amending their laws or regulations relating to the practice of dentistry and dentists business arrangements with unlicensed persons like us. There can be no assurance that any amendments or new laws or regulations,
or the interpretation or application of existing or new laws or regulations, will not have a material adverse effect on our business, financial condition and results of operations.

There are certain regulatory issues associated with our role in negotiating and administering managed care contracts. To the extent that we or any affiliated practice contracts with third-party payors, including
self-insured plans, under a capitated or other arrangement which causes us or such affiliated practice to assume a portion of the financial risk of providing dental care, we or such affiliated practice may become subject to state insurance laws. We
and the affiliated practices have various insurance coverages under which we and the affiliated practices are named as insureds and in certain instances have retention levels for which we and the affiliated practices are financially obligated. If we
or any affiliated practice is determined to be engaged in the business of insurance, we may be required to change our contractual relationships or seek appropriate licensure. Any regulation of us or the affiliated practices under insurance laws
could have a material adverse effect on our business, financial condition and results of operations. In certain circumstances, through our role in negotiating and administering managed care and other provider contracts, plans or arrangements we are
also subject to regulation in certain states as an administrator and must ensure that our activities comply with relevant regulation.

Federal
Regulation

The dental industry is also regulated at the federal level to the extent that dental services are reimbursed under federal programs.
Participation by the affiliated practices and their dentists in such programs subjects them, and potentially us, to significant regulation regarding the provision of services to beneficiaries, submission of claims and related matters, including the
types of regulations discussed below. Violation of these laws or regulations can result in civil and criminal penalties, including possible exclusion of individuals and entities from participation in federal payment programs.

The federal anti-kickback statutes prohibit, in part, and subject to certain safe harbors, the payment or receipt of remuneration in return for, or in order to induce,
referrals, or arranging for referrals, for items or services which are reimbursable under federal payment programs. Other federal laws impose significant penalties for false or improper billings or inappropriate coding for dental services. The
federal self-referral law, or Stark law, prohibits dentists from making referrals for certain designated health services reimbursable under federal payment programs to entities with which they have financial relationships unless a
specific exception applies. The Stark law also prohibits the entity receiving such referrals from submitting a claim for services provided pursuant to such referral. We may be subject to federal payor rules prohibiting the assignment of the right to
receive payment for services rendered unless certain conditions are met. These rules prohibit a billing agent from receiving a fee based on a percentage of collections and may require payments for the services of the dentists to be made directly to
the dentist providing the services or to a lock-box account held in the name of the dentist or his or her dental group. In addition, these rules provide that accounts receivables from federal payors are not saleable or assignable.

Tooth Doctor and the other affiliated practices are also covered entities under the Health Insurance Portability and Accountability Act of 1996 (HIPAA).
Among other things, HIPAA includes provisions regarding



12



---

##### Table of Contents

protection of the privacy of medical information, requiring us to maintain extensive policies and procedures and also includes provisions relating to
standards for security of electronic protected health information and electronic transactions.

Finally, dental practices are also subject to compliance
with federal regulatory standards in the areas of safety, health and access.

Medicaid

Tooth Doctor is a provider under AHCCCS, Arizonas Medicaid program. As a result it must comply with both state and federal Medicaid laws as well as the
requirements of its contracts with third-party payors which administer claims and reimbursement under that program.

Insurance

We maintain insurance coverage that we believe is appropriate for our business, including property-casualty, business interruption and general liability, among others.
In addition, the affiliated practices are required to maintain, or cause to be maintained, professional liability insurance with us as a named insured. Beginning in 2007, certain of our insurances will be reinsured by a wholly-owned captive
insurance company licensed in the state of Vermont. While we believe that our current insurance coverage is adequate for our current operations, it may not be sufficient for all future claims. In addition, the costs, retention levels and
availability of certain insurance have fluctuated significantly in recent years, and there can be no assurance that our current insurance coverages will continue to be available in adequate amounts or at a reasonable cost in the future or that
reserve levels of our captive insurance company for potential losses below applicable retention levels under certain insurance coverages will be sufficient.

Customers

For the fiscal year ended December 31, 2006, revenue generated from our service agreements with PDG, P.A., the affiliated
practice at Park Dental and Wisconsin Dental Group, S.C., the affiliated practice at Forward Dental, represented 29% and 13%, respectively, of our consolidated net revenue. The termination of either of these service agreements could have a material
adverse effect on our business, financial condition and results of operations.

Employees

As of December 31, 2006, we had 2,347 employees, including 34 dentists (representing 10 full-time equivalent dentists) and 1,178 hygienists, assistants and
administrative personnel at our dental facilities, shared service centers and our corporate office. We consider our relationship with our employees to be satisfactory. We do not employ dentists nor do we employ hygienists or dental assistants in
states where laws prohibit us from doing so. The affiliated practices, excluding Tooth Doctor, presently employ 687 hygienists and assistants and employ or contract with 524 dentists, representing 460 full-time equivalent dentists.

Available Information

We make available, free of charge, through
our website (www.amdpi.com), our Annual Report on Form 10-K, Quarterly Reports on Form 10-Q, current reports on Form 8-K, all amendments to these reports and other filings with the United States Securities and Exchange Commission (the
SEC), as soon as reasonably practicable after filing. The public can also obtain access to our reports by visiting the SEC Public Reference Room, 100 F Street, NE, Room 1580, Washington, DC 20549, by calling the SEC at 1-800-SEC-0330 or
by the SECs website at www.sec.gov.



13



---

##### Table of Contents

Executive Officers and Senior Management of the Registrant

The following table sets forth information concerning each of our current executive officers and members of senior management, each of whom are elected annually by the
Board of Directors:



|                       |  |     |  |                                                                 
|---------------------- |  | --- |  | ----------------------------------------------------------------
|Name                   |  | Age |  | Position                                                        
|Gregory A. Serrao*     |  | 44  |  | Chairman, President and Chief Executive Officer                 
|Breht T. Feigh*        |  | 40  |  | Executive Vice President - Chief Financial Officer and Treasurer
|Michael J. Vaughan*    |  | 53  |  | Executive Vice President - Chief Operating Officer              
|Paul F. Gill           |  | 61  |  | Senior Vice President - Regional Operations                     
|Michael J. Kenneally   |  | 46  |  | Senior Vice President - Regional Operations                     
|Jesely C. Ruff, D.D.S. |  | 52  |  | Senior Vice President - Chief Professional Officer              
|Ian H. Brock           |  | 37  |  | Vice President - Planning and Investment                        
|James A. Dooley        |  | 41  |  | Vice President - Corporate Development                          
|Robert A. Duncan       |  | 59  |  | Vice President - Information Systems                            
|George R. Sullivan     |  | 49  |  | Vice President - Human Resources                                
|Mark W. Vargo*         |  | 55  |  | Vice President - Chief Accounting Officer                       

---

|* | Designated by the Board of Directors as an executive officer.
|- | -------------------------------------------------------------

Mr. Serrao founded American Dental Partners, Inc. and has served as our President, Chief Executive Officer and a Director since December 1995 and as Chairman since October 1997. From 1992 through December 1995, Mr. Serrao
served as the President of National Specialty Services, Inc., a subsidiary of Cardinal Health, Inc. (Cardinal Health). From 1991 to 1992, Mr. Serrao served as Vice President - Corporate Development of Cardinal Health. Before joining
Cardinal Health, Mr. Serrao was an investment banker at Dean Witter Reynolds Inc. where he co-founded its health care investment banking group and specialized in mergers, acquisitions and public equity offerings.

Mr. Feigh has served as our Executive Vice President  Chief Financial Officer and Treasurer since November 2003. Mr. Feigh was Vice President
 Chief Financial Officer and Treasurer from January 2001 to October 2003, Vice President  Strategic Initiatives from January 2000 to December 2000 and was Director  Corporate Development from October 1997 to December 1999. Prior to
joining us, Mr. Feigh was employed in various investment banking positions at Dean Witter Reynolds Inc., ING Barings and Robertson, Stephens & Company from 1989 to 1997.

Mr. Vaughan has served as our Executive Vice President  Chief Operating Officer since November 2003. Mr. Vaughan was Senior Vice President 
Chief Operating Officer from October 2001 to October 2003, Senior Vice President  Regional Operations from January 2001 to September 2001 and Vice President  Operations from January 2000 to December 2000. From 1996 to December 1999,
Mr. Vaughan served as Regional Vice President for Cardinal Distribution, a subsidiary of Cardinal Health. From 1988 to 1995, Mr. Vaughan held the positions of Vice President and General Manager of Cardinal Distributions Knoxville,
Tennessee and Zanesville, Ohio facilities and also Vice President of Strategic Initiatives. Prior to joining Cardinal Health, Mr. Vaughan worked for McKesson HBOC in various sales management positions.

Mr. Gill has served as our Senior Vice President  Regional Operations since January 2001. From October 1993 to December 2000, Mr. Gill served as
Administrator for Riverside Dental Group, one of our affiliated dental groups. From September 1991 to September 1993, Mr. Gill served as Community Development Director for the City of Moreno Valley, California. Before working for the City of
Moreno Valley, Mr. Gill served as a career Air Force officer and pilot. His last assignment was as Commander of March Air Force Base in Riverside, California.

Mr. Kenneally has served as our Senior Vice President  Regional Operations since February 2005. Mr. Kenneally has also served as Chief Executive Officer of PDHC, Ltd., one of our subsidiaries, since January 2001.
Mr. Kenneally was Chief Operating Officer of PDHC, Ltd. from July 1998 to December 2000, Director of Business Management from 1995 to June 1998, Director of Finance and Information Systems from 1994 to 1995 and Controller from 1988 to 1994.



14



---

##### Table of Contents

Dr. Ruffhas served as our Senior Vice President  Chief Professional Officer since February 2005.
Dr. Ruff was Vice President  Chief Professional Officer from January 1999 to February 2005 and has chaired our Professional Leadership Forum and its predecessor since January 1997. From 1992 to December 1998, Dr. Ruff served as
President of Wisconsin Dental Group, S.C., one of our affiliated practices, where he was employed as a practicing dentist and held a variety of positions since 1985. In 1994, Dr. Ruff served on the Board of Directors of the National Association
of Prepaid Dental Plans. From 1983 to 1991, Dr. Ruff was an Assistant Professor at the Marquette University School of Dentistry and an adjunct faculty member from 1991 to 1996, where he held a variety of clinical faculty and grant-related
positions.

Mr. Brock has served as our Vice President  Planning and Investment since February 2005. Mr. Brock was Vice President
 Finance from October 2001 to January 2005, Vice President  Financial Planning from January 2001 to September 2001, Director  Financial Planning from February 1998 to December 2000 and Assistant Controller from September 1996 to
January 1998. Prior to joining us, Mr. Brock worked for American Medical Response, Inc., (AMR) a national provider of ambulance services, as a corporate financial analyst from 1995 to 1996 and as an accounting manager and financial
analyst from 1991 to 1995 with AMR of Connecticut, Inc., one of AMRs four founding subsidiaries.

Mr. Dooley has served as our Vice
President  Corporate Development since November 2006. Mr. Dooley was Director  Corporate Development from July 2002 to October 2006. From June 2001 to December 2001, Mr. Dooley was a partner at Rocky Point Equity Partners. From
August 1994 to June 2001, Mr. Dooley was a Manager and a Director of Corporate Development at Simon Worldwide, Inc.

Mr. Duncanhas served
as our Vice President  Information Services since July 2002. From March 1998 to June 2002, Mr. Duncan served as Vice President of Information Technology Services for National City Bank of Minneapolis N.A. From October 1995 to February
1998, Mr. Duncan served as Manager of Distributed Computing Services for Alltel Information Services. From 1992 to 1995, Mr. Duncan served as Manager of Technical Support for American Bank, N.A. From 1985 to 1992, Mr. Duncan served as
Assistant Vice President of Support Services for First Banks Systems N.A., now US BancCorp.

Mr. Sullivan has served as our Vice President
 Human Resources since August 2003. From August 2000 to March 2003, Mr. Sullivan was Vice President of Human Resources of Creo Americas, Inc. From May 1998 to August 2000, Mr. Sullivan was Area Director, Human Resources for The
Martin-Brower Company and from 1994 to April 1998 Mr. Sullivan was Director, Human Resources of Cardinal Health.

Mr. Vargohas served as
our Vice President  Chief Accounting Officer since May 2003. From May 2000 to August 2002, Mr. Vargo was Vice President of Finance and Administration for International Garden Products, Inc. (IGP), during which he served as
Chief Financial Officer of IGPs Langeveld business unit from October 2001 to August 2002. From January 1999 to February 2000, Mr. Vargo was Global Controller of EMC, Inc. From 1990 to January 1999, Mr. Vargo served in several senior
management positions at Anixter International Inc. including Vice President of Finance of the Structured Cabling Division and North American Controller. Mr. Vargo is a certified public accountant and began his professional accounting career
with a predecessor to KPMG LLP.



15



---

##### Table of Contents

ITEM 1A. RISK FACTORS

We are dependent on the performance of the affiliated practices for our net revenue

Our net revenue depends primarily on revenue generated by the affiliated practices. We do not employ dentists, except for Arizonas Tooth Doctor
for Kids, and we do not control the clinical decisions of any of the affiliated practices. There can be no assurance that the affiliated practices will maintain successful operations or that any of the key members of a particular affiliated practice
will continue practicing with that practice. Availability of dentists, hygienists or assistants could have a material adverse effect on our business. To the extent permitted by state law, each affiliated practice has entered into non-competition
agreements and other restrictive covenants with dentists under their employ and we have similar restrictive covenants with Tooth Doctors dentists. There can be no assurance that these restrictive covenants will remain in effect in all cases,
are or will be sufficient to protect the interests of the affiliated practices, or that a court will enforce such agreements. Any material loss of revenue by an affiliated practice, whether due to the loss of existing dentists or the inability to
recruit new ones, could have a material adverse effect on our business, financial condition and results of operations.

We are dependent upon the service
agreements we have entered into with each of the affiliated practices, except for Tooth Doctor, for substantially all of our revenue. Revenue generated from our service agreements with PDG, P.A., the affiliated dental practice at Park Dental, and
with Wisconsin Dental Group, S.C., the affiliated practice at Forward Dental, represent 29% and 13%, respectively of our consolidated net revenue. The termination of these service agreements would have a material adverse effect on our business,
financial condition and results of operations.

Any material loss in revenue by one or more affiliated practices would have a material adverse effect on
their ability to reimburse us for expenses and to pay our service fees. The failure to receive such amounts could have a material adverse effect on our business, financial condition and results of operations. Furthermore, in the event of a breach of
a service agreement by an affiliated practice, there can be no assurance that the remedies available to us under our service agreements would be enforceable or adequate to compensate us for damages as a result of the breach.

The outcome of pending litigation could adversely affect us

Disruption or termination of the service agreement at Park Dental could have a material adverse effect on our business, financial condition and results of operations. As described in Item 3, PDG, P.A., has filed a lawsuit seeking to
void or reform the service agreement related to the Park Dental operations (the PDG Litigation). For the year ended December 31, 2006, revenues generated from our service agreement at Park Dental represented 29% of our consolidated
revenues. In the PDG Litigation, PDG P.A., alleges, among other things, that the Companys subsidiary is engaged in the unlawful practice of dentistry, and seeks to have the Service Agreement declared void or voidable, or to have the Service
Agreement reformed by the court. PDG also seeks monetary damages and the return of the name Park Dental to PDG P.A. If the court were to determine that the Service Agreement violates the law, the court could reform the contract to
eliminate any violating provisions, void the contract, or order other equitable remedies as the court decides appropriate. The Company cannot determine how the court will rule with respect to claims made in the PDG Litigation. In addition, we expect
to incur ongoing expenses in connection with the PDG Litigation.

Our net revenue may be adversely affected by third-party payor cost containment
efforts and capitation arrangements

A significant portion of the payments for dental care that is received by the affiliated practices is paid or
reimbursed under insurance programs with third-party payors. Third-party payors are continually negotiating the fees charged for dental care, with a goal of containing reimbursement and utilization rates. Loss of revenue by the affiliated practices
caused by third-party payor cost containment efforts could have a material adverse effect on our business, financial condition and results of operations.



16



---

##### Table of Contents

Some third-party payor contracts are capitated arrangements. Under such contracts, the affiliated practice receives a
monthly payment based on the number of members for which they provide care and generally receives a co-payment from the patient at the time care is provided. Such payment methods shift a portion of the risk of providing care from the third-party
payors to the affiliated practice. To the extent that patients covered by such contracts require more frequent or extensive care than is anticipated, there may be a shortfall between the capitated payments received by the affiliated practice and the
costs incurred to provide such care. There can be no assurance that the affiliated practices will be able to negotiate satisfactory third-party payor arrangements. Unfavorable reimbursement arrangements or unfavorable utilization under capitated
contracts, as well as termination of such contracts by third-party payors could have a material adverse effect on our business, financial condition and results of operations.

In addition, Tooth Doctor is almost entirely dependent upon reimbursements under Arizonas Medicaid program. Changes in that program affecting eligibility or reimbursement rates, or Tooth Doctors failure to
retain its authorization as a provider under that program, or to comply with applicable state and federal law or its contracts with the payors who administer claims and make payments under that program, could have a material adverse effect on our
business, financial condition and results of operations.

We operate in a highly regulated environment

The dental industry and dental practices are highly regulated at the state and federal levels, as described in Business-Government Regulation. Many of these
laws and regulations vary widely by state. In addition, these laws and regulations are enforced by federal and state regulatory authorities with broad discretion, and our agreements may be subject to review by these authorities from time to time.
For example, regulatory authorities in some states in which we operate have obtained a copy of our service agreement for review in the past, and the North Carolina State Board of Dental Examiners undertook an informal review of our service agreement
with our North Carolina affiliated dental group practice pursuant to a new rule regarding management arrangements adopted by that board in 2001. We do not, and do not intend to, control the practice of dentistry by the affiliated practices or their
compliance with the regulatory requirements directly applicable to dentists or the practice of dentistry. However, there can be no assurance that any review of our business relationships, including our relationship with the affiliated practices, by
courts or other regulatory authorities, will not result in determinations that could have a material adverse effect on our operations.

Similarly, there
can be no assurance that the laws and regulatory environment will not change to restrict or limit the enforceability of our service agreements. The laws and regulations of some states in which we currently operate or may seek to expand may require
us to change our contractual relationships with dental group practices in a manner that may restrict our operations in those states or may prevent us from affiliating with dental group practices or providing comprehensive business services to dental
group practices in those states, or may require us to restructure our current or future operations. For example, a bill recently introduced in the Arizona legislature would have restricted our ability to own dental practices in that state. Although
we believe that bill will not be enacted as introduced and therefore will not prohibit our ownership of Tooth Doctor or any other Arizona dental practice, there can be no assurance that similar legislation will not be enacted in the future.
Additionally, the Arizona Board of Dentistry is considering revising its rules regarding the use of sedation. No new proposed rules have been issued to date, but changes to those rules could adversely affect Tooth Doctor. We and the affiliated
practices have various insurance coverages under which we and the affiliated practices are named as insureds and in certain instances have retention levels for which we and the affiliated practices are financially obligated. To the extent that
contracts between third party payors and any affiliated practice or us, including self-insured plans, on a capitated or other basis which causes such affiliated practices or us to assume a portion of the financial risk of providing dental care, we
or such affiliated practice may become subject to state insurance laws, in which case the affiliated practice may be required to change the method of payment from third party payors or seek appropriate licensure. If we or any affiliated practice is
determined to be engaged in the business of insurance, we may be required to change our contractual relationships or seek appropriate licensure. Any regulation of us or the affiliated practices under insurance laws could have a material adverse
effect on our business, financial condition and results of operations.



17



---

##### Table of Contents

Our future affiliations may not be successfully integrated or completed on acceptable terms

Our strategy includes expansion through affiliations with dental group practices in new and existing communities and the expansion of such affiliated practices.
Affiliations involve numerous risks, including failure to retain key personnel and contracts of the affiliated practices and the inability to work successfully with us as a business partner. There can be no assurance that we will be able to complete
additional affiliations on acceptable terms and conditions or that we will be able to serve successfully as a business partner to additional practices, and this could adversely affect our business, financial condition or results of operations. The
number of new affiliations and acquisitions over the next twelve months could be at levels greater or lower than we achieved in recent years.

We may
not realize the expected value of our intangible assets

A significant portion of our total assets is represented by intangible assets, with the amount
expected to increase with future affiliations. In addition, the related amortization expense will increase in the future as a result of additional intangible assets recorded in connection with new affiliations. In the event of any sale or
liquidation of us or a portion of our assets, there can be no assurance that the value of our intangible assets will be realized. Management performs an impairment test on definite lived intangible assets when facts and circumstances exist which
would suggest that the definite lived intangible asset may be impaired, such as loss of key personnel, change in legal factors or competition. If impairment were determined, we would make the appropriate adjustment to the intangible asset to reduce
the assets carrying value to fair value. Any future determination requiring the write off of a significant portion of unamortized intangible assets could have a material adverse effect on our business, financial condition and results of
operations.

Our operating results may be adversely affected by professional liability claims against the affiliated practices

The affiliated practices and/or individual dentists in their employ could be exposed to the risk of professional liability claims, and it is possible that such claims
could also be asserted against us. With respect to Tooth Doctor, any such claims would likely be asserted against us. Such claims, if successful, could result in substantial damages that could exceed the limits of any applicable insurance coverage.
We are named as an insured under the professional liability insurance policy covering the affiliated practices. In addition, we also require each affiliated practice to indemnify us for actions or omissions related to the delivery of dental care by
such affiliated practice. However, a successful professional liability claim against an affiliated practice or us could have a material adverse effect on our business, financial condition and results of operations.

A loss of the services of our key personnel could have a material adverse effect on our business

Our continued success depends upon the retention of our senior officers, who have been instrumental in our success, and upon our ability to attract and retain other highly qualified individuals. The loss of some of
our senior officers, or an inability to attract or retain other key individuals, could materially adversely affect us. Continued growth and success in our business depends, to a large degree, on our ability to retain and attract such employees.

ITEM 1B.  UNRESOLVED STAFF COMMENTS

None.

ITEM 2.  PROPERTIES

We lease most of our facilities from unrelated third-parties. As of December 31, 2006,
we leased or owned 209 dental facilities, one dental lab and 22 local management offices, including our corporate headquarters. Our corporate office is located at 201 Edgewater Drive, Suite 285, Wakefield, Massachusetts 01880, in approximately 8,300
square feet of office space occupied under a lease which expires in March 2007. In June 2007, we plan to move our corporate office to 401 Edgewater Drive to a larger space in order to accommodate an increase in personnel. Our current landlord has
granted us an extension until we move into the new facility. We consider our properties in good condition, well maintained and generally suitable and adequate to carry on our business activities.



18



---

##### Table of Contents

For the year ended December 31, 2006, facility utilization varied from affiliated dental group to affiliated dental
group, but overall was at a satisfactory level. The majority of our dental facilities have sufficient capacity to allow for future growth.

ITEM 3.  LEGAL PROCEEDINGS

Our Minnesota subsidiary, PDHC, Ltd. (PDHC) was served with a complaint
(the Complaint) on February 3, 2006 from PDG, P.A. (PDG), the affiliated practice at Park Dental (the PDG Litigation). PDHC and PDG are parties to an Amended and Restated Service Agreement dated
January 1, 1999 (as subsequently amended, the Service Agreement). The Complaint was amended September 22, 2006. The Complaint was filed in the Fourth Judicial District, Hennepin County, Minnesota (the Court), court
file number 27-CV-06-2500. The Complaint alleges certain breaches of the Service Agreement, violations of the Minnesota Dental Practice Act (unlawful practice of dentistry), violations of the Minnesota Franchise Act, fraud and misrepresentation,
unjust enrichment, breach of fiduciary duty and the implied covenant of good faith and fair dealing, tortious interference with contract and prospective economic advantage and constructive trust and accounting. PDG seeks to have the Service
Agreement declared void or voidable or to have the Service Agreement reformed by the Court. PDG also seeks monetary damages and return of the Park Dental name to PDG. PDHC has filed an answer to the Complaint, has asserted various
affirmative defenses, and has counterclaimed for breach of the Service Agreement, breach of implied covenant of good faith and fair dealing, fraud and misrepresentation and tortious interference with employment relationships. PDHC seeks to dismiss
the Complaint with prejudice and recover compensatory damages, interest and costs and attorneys fees. PDHC also filed a motion for summary judgment seeking to have several of PDGs claims dismissed before trial, including the claim that
the Service Agreement is void or voidable. The parties have also delivered formal breach letters to one another under the Service Agreement. Discovery in this case is substantially complete, the parties engaged, unsuccessfully, in court-ordered
mediation and the case is scheduled to be tried beginning on July 5, 2007.

For the year ended December 31, 2006, revenues generated from our Service
Agreement at Park Dental represented 29% of our consolidated net revenues. There is no assurance of adjudication of the case in PDHCs favor or that the Court will grant PDHCs motion for summary judgment. Disruption or termination of the
Service Agreement at Park Dental could have a material adverse effect on our business, financial condition and results of operations. PDHC believes the claims made by PDG are baseless, and PDHC intends to vigorously contest all claims in the
Complaint and pursue its counterclaims. In addition, we expect to incur ongoing expenses in connection with the PDG Litigation.

ITEM 4.  SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS

None.



19



---

##### Table of Contents

PART II

ITEM 5.  MARKET FOR THE REGISTRANTS COMMON EQUITY, RELATED STOCKHOLDER MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES

Market Information, Holders and Dividends

On September 8, 2005, our Board of Directors approved a three-for-two
split of our Common Stock, effected in the form of a 50% stock dividend, to stockholders of record as of September 20, 2005. On October 14, 2005, we issued 4,017,067 shares of Common Stock in connection with this transaction and recorded a
charge to additional paid in capital equal to the par value of shares issued. Accordingly, all amounts and disclosures in this Annual Report on Form 10-K, including the accompanying consolidated financial statements and share data, have been
restated for all periods presented.

Our Common Stock is traded on the NASDAQ National Market system under the symbol ADPI. The following table
sets forth the range of the reported high and low sales prices of our Common Stock for the years ended December 31, 2005 and 2006.



|            |  |      |       |     |   |      
|----------- |  | ---- | ----- | --- | - | -----
|2005        |  | High |       | Low
|1st Quarter |  | $    | 17.11 |     | $ | 12.36
|2nd Quarter |  | $    | 17.47 |     | $ | 14.51
|3rd Quarter |  | $    | 23.71 |     | $ | 15.60
|4th Quarter |  | $    | 23.19 |     | $ | 16.68
|            |  |     
|2006        |  | High |       | Low
|1st Quarter |  | $    | 19.24 |     | $ | 10.84
|2nd Quarter |  | $    | 15.26 |     | $ | 13.00
|3rd Quarter |  | $    | 17.70 |     | $ | 14.63
|4th Quarter |  | $    | 20.45 |     | $ | 16.41

As of December 31, 2006, there were approximately 16 holders of record of our Common Stock on the books of
our transfer agent and registrar. However, the number of registered holders does not bear any relationship to the number of beneficial owners of our Common Stock.

We have the ability to pay cash dividends on our Common Stock but have not historically done so. The terms of our revolving credit facility allow us to pay dividends without the lenders consent up to certain maximums and in compliance
with certain covenants. Our Board of Directors intends for the foreseeable future to retain earnings to finance the continued operation and expansion of our business.



20



---

##### Table of Contents

Our performance graph below (and accompanying data points graph is based on) provides a graphical comparison of our stock
performance to comparable indices over five years.

LOGO



|                               |  |        |  |        |  |        |  |        |  |        |  |       
|------------------------------ |  | ------ |  | ------ |  | ------ |  | ------ |  | ------ |  | ------
|                               |  | 12/01  |  | 12/02  |  | 12/03  |  | 12/04  |  | 12/05  |  | 12/06 
|                               |  |        |  |        |  |       
|American Dental Partners, Inc. |  | 100.00 |  | 140.84 |  | 180.16 |  | 300.95 |  | 430.48 |  | 449.76
|Russell 2000                   |  | 100.00 |  | 79.52  |  | 117.09 |  | 138.55 |  | 144.86 |  | 171.47
|S & P Health Care              |  | 100.00 |  | 81.17  |  | 93.40  |  | 94.96  |  | 101.10 |  | 108.71

Summary of Equity Plans

See Item 12 of Part III for a summary of equity plans as of December 31, 2006.

Recent Sales of Unregistered
Securities

None.

Recent Share Repurchases

None.



21



---

##### Table of Contents

ITEM 6.  SELECTED FINANCIAL DATA (in thousands, except per share amounts and statistical data)

The following
selected consolidated financial and operating data set forth below with respect to the Companys consolidated statements of income for fiscal years 2006, 2005 and 2004 and consolidated balance sheets as of December 31, 2006 and 2005 are
derived from the Companys consolidated financial statements included elsewhere in this Annual Report on Form 10-K. Data with respect to the consolidated statements of income for fiscal years 2003 and 2002 and consolidated balance sheets as of
December 31, 2004, 2003 and 2002 are derived from the Companys consolidated financial statements as previously filed. The data set forth below should be read in conjunction with the Managements Discussion and Analysis of
Financial Condition and Results of Operations and the Companys consolidated financial statements and notes thereto included elsewhere in this Annual Report on Form 10-K.



|                                                 |  |                           |         |     |      |   |         |  |   |         |   |      |   |         |  |   |         |  
|------------------------------------------------ |  | ------------------------- | ------- | --- | ---- | - | ------- |  | - | ------- | - | ---- | - | ------- |  | - | ------- | -
|                                                 |  | Years Ending December 31, |        
|                                                 |  | 2006                      |         |     | 2005 |   | 2004    |  |   | 2003    |   | 2002 |  
|Consolidated Statement of Operations Data:       |  |                           |         |     |      |   |         |  |   |         |   |      |   |         |  |   |         |  
|Net revenue                                      |  | $                         | 217,917 |     |      | $ | 196,928 |  | $ | 178,554 |   |      | $ | 163,707 |  | $ | 146,810 |  
|                                                 |  |                           |         |     |     
|Operating expenses:                              |  |                           |         |     |      |   |         |  |   |         |   |      |   |         |  |   |         |  
|Salaries and benefits                            |  |                           | 91,282  |     |      |   | 83,638  |  |   | 77,489  |   |      |   | 72,557  |  |   | 65,762  |  
|Lab fees and dental supplies                     |  |                           | 35,066  |     |      |   | 31,638  |  |   | 28,566  |   |      |   | 27,047  |  |   | 24,164  |  
|Office occupancy                                 |  |                           | 26,404  |     |      |   | 23,013  |  |   | 20,956  |   |      |   | 19,999  |  |   | 18,314  |  
|Other operating expenses                         |  |                           | 19,084  |     |      |   | 18,372  |  |   | 16,643  |   |      |   | 14,638  |  |   | 13,163  |  
|General corporate expenses                       |  |                           | 12,696  | (6) |      |   | 9,570   |  |   | 8,856   |   |      |   | 6,871   |  |   | 5,859   |  
|Depreciation                                     |  |                           | 7,845   |     |      |   | 7,001   |  |   | 5,934   |   |      |   | 5,378   |  |   | 4,990   |  
|Amortization of intangible assets                |  |                           | 5,358   |     |      |   | 5,007   |  |   | 4,408   |   |      |   | 4,229   |  |   | 4,047   |  
|Special charges                                  |  |                           | -       |     |      |   | -       |  |   | -       |   |      |   | -       |  |   | (26     | )
|                                                 |  |                           |         |     |      |   |         |  |   |         |   |      |   |         |  |   |         |  
|Total operating expenses                         |  |                           | 197,735 |     |      |   | 178,239 |  |   | 162,852 |   |      |   | 150,719 |  |   | 136,273 |  
|                                                 |  |                           |         |     |      |   |         |  |   |         |   |      |   |         |  |   |         |  
|Earnings from operations                         |  |                           | 20,182  |     |      |   | 18,689  |  |   | 15,702  |   |      |   | 12,988  |  |   | 10,537  |  
|Interest expense                                 |  |                           | 1,848   |     |      |   | 1,804   |  |   | 1,592   |   |      |   | 2,592   |  |   | 2,947   |  
|Minority interest                                |  |                           | 54      |     |      |   | -       |  |   | -       |   |      |   | -       |  |   | -       |  
|                                                 |  |                           |         |     |      |   |         |  |   |         |   |      |   |         |  |   |         |  
|Earnings before income taxes                     |  |                           | 18,280  |     |      |   | 16,885  |  |   | 14,110  |   |      |   | 10,396  |  |   | 7,590   |  
|Income taxes                                     |  |                           | 7,146   |     |      |   | 6,594   |  |   | 5,591   |   |      |   | 4,215   |  |   | 2,883   |  
|                                                 |  |                           |         |     |      |   |         |  |   |         |   |      |   |         |  |   |         |  
|Net earnings                                     |  | $                         | 11,134  |     |      | $ | 10,291  |  | $ | 8,519   |   |      | $ | 6,181   |  | $ | 4,707   |  
|                                                 |  |                           |         |     |      |   |         |  |   |         |   |      |   |         |  |   |         |  
|Net earnings per common share (1):               |  |                           |         |     |      |   |         |  |   |         |   |      |   |         |  |   |         |  
|Basic                                            |  | $                         | 0.91    |     |      | $ | 0.86    |  | $ | 0.75    |   |      | $ | 0.56    |  | $ | 0.43    |  
|Diluted                                          |  | $                         | 0.86    |     |      | $ | 0.81    |  | $ | 0.70    |   |      | $ | 0.54    |  | $ | 0.42    |  
|Weighted average common shares outstanding (1):  |  |                           |         |     |      |   |         |  |   |         |   |      |   |         |  |   |         |  
|Basic                                            |  |                           | 12,301  |     |      |   | 12,006  |  |   | 11,372  |   |      |   | 10,979  |  |   | 10,833  |  
|Diluted                                          |  |                           | 12,916  |     |      |   | 12,716  |  |   | 12,102  |   |      |   | 11,358  |  |   | 11,177  |  
|                                                 | 
|                                                 |  | December 31,              |        
|                                                 |  | 2006                      |         |     | 2005 |   | 2004    |  |   | 2003    |   | 2002 |  
|Consolidated Balance Sheet Data:                 |  |                           |         |     |      |   |         |  |   |         |   |      |   |         |  |   |         |  
|Cash and cash equivalents                        |  | $                         | 1,386   |     |      | $ | 592     |  | $ | 1,378   |   |      | $ | 1,895   |  | $ | 844     |  
|Working capital                                  |  |                           | (4,813  | )   |      |   | 2,055   |  |   | (2,306  | ) |      |   | 3,916   |  |   | 6,344   |  
|Total assets                                     |  |                           | 195,820 |     |      |   | 170,646 |  |   | 154,147 |   |      |   | 149,072 |  |   | 145,015 |  
|Total debt                                       |  |                           | 33,888  |     |      |   | 32,162  |  |   | 28,541  |   |      |   | 43,726  |  |   | 51,263  |  
|Total stockholders equity                       |  |                           | 116,311 |     |      |   | 101,895 |  |   | 87,207  |   |      |   | 73,892  |  |   | 66,916  |  
|                                                 |  |                           |         |     |     
|Statistical Data:                                |  |                           |         |     |      |   |         |  |   |         |   |      |   |         |  |   |         |  
|Number of states                                 |  |                           | 18      |     |      |   | 18      |  |   | 17      |   |      |   | 17      |  |   | 16      |  
|Number of affiliated dental groups practices (2) |  |                           | 22      |     |      |   | 19      |  |   | 19      |   |      |   | 19      |  |   | 22      |  
|Number of dental facilities                      |  |                           | 209     |     |      |   | 187     |  |   | 177     |   |      |   | 171     |  |   | 168     |  
|Number of operatories (3)                        |  |                           | 1,944   |     |      |   | 1,761   |  |   | 1,583   |   |      |   | 1,520   |  |   | 1,462   |  
|Number of affiliated dentists (4)                |  |                           | 470     |     |      |   | 435     |  |   | 398     |   |      |   | 396     |  |   | 383     |  
|Patient revenue (in thousands) (5)               |  | $                         | 337,401 |     |      | $ | 302,982 |  | $ | 272,369 |   |      | $ | 245,609 |  | $ | 217,020 |  



22



---

##### Table of Contents

---

|(1) | Net earnings per common share are computed on the basis described in Notes 2 and 13 to our Consolidated Financial Statements.
|--- | -----------------------------------------------------------------------------------------------------------------------------

|(2) | During 2003, two affiliated practices in Texas merged into one and four affiliated practices in Wisconsin merged into one,
|--- | --------------------------------------------------------------------------------------------------------------------------

thereby reducing the overall total. During 2004, two affiliated practices in Massachusetts and Vermont merged into one.

|(3) | An operatory is an area where dental care is performed and generally contains a dental chair, a hand piece delivery system and other essential dental equipment.
|--- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------

|(4) | Includes full-time equivalent general or specialist dentists employed by or contracted with the affiliated practices.
|--- | ---------------------------------------------------------------------------------------------------------------------

|(5) | Reflects $335,862 of patient revenue from affiliated practices the Company does not own (non-GAAP measure) and, accordingly, does not consolidate its financial statements with the
financial statements of these affiliated practices, and $1,539 of patient revenue from Arizonas Tooth Doctor for Kids.
|--- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

|(6) | Includes stock option expense of $1,363 and PDG litigation expense of $1,572 ($1,857 net of tax or $.14 diluted earnings per share).
|--- | ------------------------------------------------------------------------------------------------------------------------------------

| | See Managements Discussion and Analysis of Financial Condition and Results of Operations.
| | ------------------------------------------------------------------------------------------



23



---

##### Table of Contents

ITEM 7.    MANAGEMENTS DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

Overview

American Dental Partners is a leading provider of business services to multidisciplinary dental group practices in selected
markets throughout the United States. We are committed to the growth and success of the affiliated practices, and we make substantial investments to support each affiliated practices growth. We provide or assist with organizational planning
and development; recruiting, retention and training programs; quality assurance initiatives; facilities development and management; employee benefits administration; procurement; information systems; marketing and payor relations; and financial
planning, reporting and analysis. At December 31, 2006, we were affiliated with 22 dental group practices, comprising 470 full-time equivalent dentists practicing in 209 dental facilities in 18 states.

Legal Proceedings

Our Minnesota subsidiary, PDHC, Ltd.
(PDHC) was served with a complaint (the Complaint) on February 3, 2006 from PDG, P.A. (PDG), the affiliated practice at Park Dental (the PDG Litigation). PDHC and PDG are parties to an Amended and
Restated Service Agreement dated January 1, 1999 (as subsequently amended, the Service Agreement). The Complaint was amended September 22, 2006. The Complaint was filed in the Fourth Judicial District, Hennepin County,
Minnesota (the Court), court file number 27-CV-06-2500. The Complaint alleges certain breaches of the Service Agreement, violations of the Minnesota Dental Practice Act (unlawful practice of dentistry), violations of the Minnesota
Franchise Act, fraud and misrepresentation, unjust enrichment, breach of fiduciary duty and the implied covenant of good faith and fair dealing, tortious interference with contract and prospective economic advantage and constructive trust and
accounting. PDG seeks to have the Service Agreement declared void or voidable or to have the Service Agreement reformed by the Court. PDG also seeks monetary damages and return of the Park Dental name to PDG. PDHC has filed an answer to
the Complaint, has asserted various affirmative defenses, and has counterclaimed for breach of the Service Agreement, breach of implied covenant of good faith and fair dealing, fraud and misrepresentation and tortious interference with employment
relationships. PDHC seeks to dismiss the Complaint with prejudice and recover compensatory damages, interest and costs and attorneys fees. PDHC also filed a motion for summary judgment seeking to have several of PDGs claims dismissed
before trial, including the claim that the Service Agreement is void or voidable. The parties have also delivered formal breach letters to one another under the Service Agreement. Discovery in this case is substantially complete, the parties
engaged, unsuccessfully, in court-ordered mediation and the case is scheduled to be tried beginning on July 5, 2007.

For the year ended December 31,
2006, revenues generated from our Service Agreement at Park Dental represented 29% of our consolidated net revenues. There is no assurance of adjudication of the case in PDHCs favor or that the Court will grant PDHCs motion for summary
judgment. Disruption or termination of the Service Agreement at Park Dental could have a material adverse effect on our business, financial condition and results of operations. PDHC believes the claims made by PDG are baseless, and PDHC intends to
vigorously contest all claims in the Complaint and pursue its counterclaims. In addition, we expect to incur ongoing expenses in connection with the PDG Litigation.

Acquisition and Affiliation Summary

When affiliating with a dental practice, we customarily acquire selected assets
and enter into a long-term service agreement with the affiliated practice. Under our service agreements, we are responsible for providing all services necessary for the administration of the non-clinical aspects of the dental operations. The
affiliated practice is responsible for the provision of dental care. Each of our service agreements is for an initial term of 40 years.



24



---

##### Table of Contents

During 2006, 2005 and 2004, we completed thirteen, ten and five acquisition and affiliation transactions, respectively.
In two of these transactions, we acquired non-clinical assets and entered into long-term service agreements with the affiliated practices. In one of these transactions, we developed de novo dental facilities rather than acquiring non-clinical
assets, and we entered into a long-term service agreement with the affiliated practice. In 24 of these transactions, we acquired non-clinical assets, and the practice was combined with one of our existing affiliated practices and became subject to
an existing service agreement. Finally, in one of these transactions, we acquired the assets of the practice, Arizonas Tooth Doctor for Kids (Tooth Doctor), and as permitted by applicable state law, Tooth Doctor employs the
dentists thus not necessitating a service agreement between us and the affiliated practice. These acquisition and affiliation transactions resulted in the addition of four affiliated practices, 41 dental facilities and 371 operatories. The 2006,
2005 and 2004 acquisition and affiliation transactions, at the time of the transactions, generated $38 million, $29 million and $6 million of patient revenue on an annualized basis, respectively.

We are constantly evaluating potential acquisition and affiliation transactions with dental practices and acquisitions of other dental-related companies that would
expand our business capabilities. The number of new affiliations and acquisitions over the next twelve months could be at levels greater or less than we have achieved in recent years.

Revenue Overview

Net Revenue

Our net revenue includes management fees earned by us pursuant to the terms of the service agreements with the affiliated practices, as well as reimbursement of clinic expenses paid by us on their behalf, and other
revenue which includes patient revenue of Tooth Doctor, fees earned by our dental benefits third party administrator (TPA) and fees earned by our dental laboratory.

The following table provides the components of our net revenue for 2006, 2005 and 2004 (in thousands):



|                                        |  |      |         |      |   |         |  |   |        
|--------------------------------------- |  | ---- | ------- | ---- | - | ------- |  | - | -------
|                                        |  | 2006 |         | 2005 |   | 2004   
|Reimbursement of expenses               |  | $    | 159,932 |      | $ | 144,599 |  | $ | 130,746
|Business service fees                   |  |      | 51,945  |      |   | 47,380  |  |   | 42,714 
|                                        |  |      |         |      |   |         |  |   |        
|Revenue earned under service agreements |  |      | 211,877 |      |   | 191,979 |  |   | 173,460
|Other revenue                           |  |      | 6,040   |      |   | 4,949   |  |   | 5,094  
|                                        |  |      |         |      |   |         |  |   |        
|Net revenue                             |  | $    | 217,917 |      | $ | 196,928 |  | $ | 178,554
|                                        |  |      |         |      |   |         |  |   |        

Fees earned under service agreements include reimbursement of expenses incurred by us on behalf of the affiliated
practices in connection with the operation and administration of dental facilities and service fees charged to the affiliated practices pursuant to the terms of the service agreements for management services provided and capital committed by us.
Under certain service agreements, representing 55% of our 2006 service fees, our service fee consists of a monthly fee which is based upon a specified percentage of the amount by which the affiliated practices patient revenue exceeds expenses.
Under a certain service agreement, representing 28% of our 2006 service fees, our service fee consists of (i) a monthly fee for the first six months of the year equal to the prior year service fee and an additional performance fee based upon a
percentage of the increase of the amount by which the affiliated practices patient revenue exceeds expenses as compared to the prior year and (ii) a monthly fee for the second six months of the year which is based upon a specified
percentage of the amount by which the affiliated practices patient revenue exceeds expenses. Under certain service agreements, representing 16% of our 2006 service fees, our service fee consists entirely of a fixed monthly fee determined by
agreement of us and the affiliated practice in a formal planning process. Under a certain service agreement, representing less than 1% of our 2006 service fees, our service fee consists of a fixed monthly fee and an additional performance fee based
upon a percentage of the amount by which the affiliated practices patient revenue exceeds expenses as compared to the planned amount for the current year. In all instances, the service fee is negotiated at fair market value for services
provided and capital committed by us to the affiliated practices.



25



---

##### Table of Contents

Reimbursement of expenses includes costs incurred by us for the operation and administration of the dental facilities
that include salaries and benefits for non-dentist personnel working at the dental facilities (the administrative staff and, where permitted by law, the dental assistants and hygienists), lab fees, dental supplies, office occupancy costs of the
dental facilities, depreciation related to the fixed assets at the dental facilities and other expenses such as professional fees, marketing costs and general and administrative expenses.

For additional information on components of our net revenue, see Note 3 of Notes to Consolidated Financial Statements.

Patient Revenue of the Affiliated Practices

We believe it is
important to understand patient revenue of the affiliated practices. This includes the practices that we do not control, nor own any equity interests in, and are affiliated with us by means of service agreements. We do not consolidate the financial
statements of these affiliated practices with ours, and accordingly their patient revenue is not a measure of our financial performance under generally accepted accounting principles because it is not our revenue. It is however, a financial measure
we use, along with the patient revenue of Tooth Doctor, to monitor operating performance and to help identify and analyze trends of the affiliated practices which may impact our business. Most of the operating expenses incurred by us, pursuant to
service agreements, are on behalf of the affiliated practices in the operation of dental facilities. These expenses are significantly affected by the patient revenue of the affiliated practices.

The affiliated practices generate revenue from providing care to patients and receive payment from patients and dental benefit providers, or payors, under
fee-for-service, PPO plans and managed care capitation plans. Patient revenue reflects the amounts billed by an affiliated practice at its established rates reduced by any contractual adjustments and allowances for uncollectible accounts.
Contractual adjustments represent discounts off established rates negotiated pursuant to certain dental benefit plan provider contracts. While payor mix varies from market to market, the following table provides the aggregate payor mix of all
affiliated practices, including Tooth Doctor, for the years ended December 31:



|                              |  |      |   |  |      |   |  |      |  
|----------------------------- |  | ---- | - |  | ---- | - |  | ---- | -
|                              |  | 2006 |   |  | 2005 |   |  | 2004 |  
|Fee-for-service               |  | 31   | % |  | 34   | % |  | 37   | %
|PPO and dental referral plans |  | 52   | % |  | 48   | % |  | 43   | %
|Capitated managed care plans  |  | 17   | % |  | 18   | % |  | 20   | %

For the affiliated practices that we do not own and are affiliated with us by means of a service agreement, after
collection of fees from patients and third-party insurers for the provision of dental care and payment to us of our service fee and reimbursement of clinic expenses incurred by us on their behalf, the amounts remaining are used by these affiliated
practices for compensation of dentists and, in certain states, hygienists and/or dental assistants who are employed by these affiliated practices.



26



---

##### Table of Contents

The following table sets forth for the years ended December 31, 2006, 2005 and 2004, the patient revenue of all the
affiliated practices, patient revenue earned by Tooth Doctor, the amounts due to us under service agreements, and amounts retained by the affiliated practices we do not own for compensation of dentists and, where applicable, other clinical staff (in
thousands):



|                                                                                                      |  |                                 |         |          |   |         |                                 |      |          |  |   |         |  |   |         |  |      |  
|----------------------------------------------------------------------------------------------------- |  | ------------------------------- | ------- | -------- | - | ------- | ------------------------------- | ---- | -------- |  | - | ------- |  | - | ------- |  | ---- | -
|                                                                                                      |  | Twelve Months EndedDecember 31, |         | % Change |   |         | Twelve Months EndedDecember 31, |      | % Change | 
|                                                                                                      |  | 2006                            |         | 2005     |   |         | 2005                            |      | 2004     | 
|Patient revenue of affiliated practices:                                                              |  |                                 |         |          |   |         |                                 |      |          |  |   |         |  |   |         |  |      |  
|Platform dental group practices affiliated with us in both periods of comparison                      |  | $                               | 322,897 |          | $ | 294,560 |                                 | 9.6  | %        |  | $ | 294,560 |  | $ | 272,369 |  | 8.1  | %
|Platform dental group practices that affiliated with us during periods of comparison                  |  |                                 | 14,504  |          |   | 8,422   |                                 | 72.2 | %        |  |   | 8,422   |  |   | -       |  | -    |  
|                                                                                                      |  |                                 |         |          |   |         |                                 |      |          |  |   |         |  |   |         |  |      |  
|Total patient revenue                                                                                 |  |                                 | 337,401 |          |   | 302,982 |                                 | 11.4 | %        |  |   | 302,982 |  |   | 272,369 |  | 11.2 | %
|Patient revenue of Tooth Doctor                                                                       |  |                                 | 1,539   |          |   | -       |                                 | -    |          |  |   | -       |  |   | -       |  | -    |  
|                                                                                                      |  |                                 |         |          |   |         |                                 |      |          |  |   |         |  |   |         |  |      |  
|Patient revenue of platform dental group practices affiliated with us by means of service agreements  |  |                                 | 335,862 |          |   | 302,982 |                                 | 10.9 | %        |  |   | 302,982 |  |   | 272,369 |  | 11.2 | %
|Amounts due to us under service agreements                                                            |  |                                 | 211,877 |          |   | 191,979 |                                 | 10.4 | %        |  |   | 191,979 |  |   | 173,460 |  | 10.7 | %
|                                                                                                      |  |                                 |         |          |   |         |                                 |      |          |  |   |         |  |   |         |  |      |  
|Amounts retained by platform dental group practices affiliated with us by means of service agreements |  | $                               | 123,985 |          | $ | 111,003 |                                 | 11.7 | %        |  | $ | 111,003 |  | $ | 98,909  |  | 12.2 | %
|                                                                                                      |  |                                 |         |          |   |         |                                 |      |          |  |   |         |  |   |         |  |      |  

Same market patient revenue growth was 9.6% for the year ended December 31, 2006 and was comprised of a 5.8%
increase in provider hours, 3.3% improvement in provider productivity and the remainder to improved reimbursement rates received from dental benefit insurers. Same market patient revenue growth for 2006 excludes platform affiliations that occurred
after January 1, 2005. Same market patient revenue growth was 8.1% for the year ended December 31, 2005 and was comprised of a 4.2% increase in provider hours, 2.1% improvement in provider productivity and the remainder to improved
reimbursement rates. Same market patient revenue growth for 2005 excludes platform affiliations that occurred after January 1, 2004.

Amounts retained
by affiliated practices we do not own increased 11.7% in 2006 and 12.2% in 2005. The increase in 2006 was attributable to greater profitability levels at the affiliated practices. The increase in 2005 is primarily due to practice affiliations during
the periods of comparison where the affiliated practices are required to employ the hygienists and dental assistants.



27



---

##### Table of Contents

Results of Operations

The following tables set forth our net revenue and results of operations for the years ended December 31, 2006, 2005 and 2004 (in thousands):



|                                  |  |        |         |                 |       |   |        |   |                 |  |       |         |  |      |  
|--------------------------------- |  | ------ | ------- | --------------- | ----- | - | ------ | - | --------------- |  | ----- | ------- |  | ---- | -
|                                  |  | 2006   |         |                 | 2005  |   |        |   |                
|                                  |  | Amount |         | % of NetRevenue |       |   | Amount |   | % of NetRevenue |  |       | %Change | 
|Net revenue                       |  | $      | 217,917 |                 | 100.0 | % |        | $ | 196,928         |  | 100.0 | %       |  | 10.7 | %
|Salaries and benefits             |  |        | 91,282  |                 | 41.9  | % |        |   | 83,638          |  | 42.5  | %       |  | 9.1  | %
|Lab fees and dental supplies      |  |        | 35,066  |                 | 16.1  | % |        |   | 31,638          |  | 16.1  | %       |  | 10.8 | %
|Office occupancy                  |  |        | 26,404  |                 | 12.1  | % |        |   | 23,013          |  | 11.7  | %       |  | 14.7 | %
|Other operating expenses          |  |        | 19,084  |                 | 8.8   | % |        |   | 18,372          |  | 9.3   | %       |  | 3.9  | %
|General corporate expenses        |  |        | 12,696  |                 | 5.8   | % |        |   | 9,570           |  | 4.9   | %       |  | 32.7 | %
|Depreciation expense              |  |        | 7,845   |                 | 3.6   | % |        |   | 7,001           |  | 3.6   | %       |  | 12.1 | %
|Amortization of intangible assets |  |        | 5,358   |                 | 2.5   | % |        |   | 5,007           |  | 2.5   | %       |  | 7.0  | %
|                                  |  |        |         |                 |       |   |        |   |                 |  |       |         |  |      |  
|Total operating expenses          |  |        | 197,735 |                 | 90.7  | % |        |   | 178,239         |  | 90.6  | %       |  | 10.9 | %
|                                  |  |        |         |                 |       |   |        |   |                 |  |       |         |  |      |  
|Earnings from operations          |  |        | 20,182  |                 | 9.3   | % |        |   | 18,689          |  | 9.4   | %       |  | 8.0  | %
|Interest expense, net             |  |        | 1,848   |                 | 0.9   | % |        |   | 1,804           |  | 0.9   | %       |  | 2.4  | %
|Minority interest                 |  |        | 54      |                 | 0.0   | % |        |   | -               |  | 0.0   | %       |  | 0.0  | %
|                                  |  |        |         |                 |       |   |        |   |                 |  |       |         |  |      |  
|Earnings before income taxes      |  |        | 18,280  |                 | 8.4   | % |        |   | 16,885          |  | 8.5   | %       |  | 8.3  | %
|Income taxes                      |  |        | 7,146   |                 | 3.3   | % |        |   | 6,594           |  | 3.3   | %       |  | 8.4  | %
|                                  |  |        |         |                 |       |   |        |   |                 |  |       |         |  |      |  
|Net earnings                      |  | $      | 11,134  |                 | 5.1   | % |        | $ | 10,291          |  | 5.2   | %       |  | 8.2  | %
|                                  |  |        |         |                 |       |   |        |   |                 |  |       |         |  |      |  
|                                  |  |        |        
|                                  |  | 2005   |         |                 | 2004  |   |        |   |                
|                                  |  | Amount |         | % of NetRevenue |       |   | Amount |   | % of NetRevenue |  |       | %Change | 
|Net revenue                       |  | $      | 196,928 |                 | 100.0 | % |        | $ | 178,554         |  | 100.0 | %       |  | 10.3 | %
|Salaries and benefits             |  |        | 83,638  |                 | 42.5  | % |        |   | 77,489          |  | 43.4  | %       |  | 7.9  | %
|Lab fees and dental supplies      |  |        | 31,638  |                 | 16.1  | % |        |   | 28,566          |  | 16.0  | %       |  | 10.8 | %
|Office occupancy                  |  |        | 23,013  |                 | 11.7  | % |        |   | 20,956          |  | 11.7  | %       |  | 9.8  | %
|Other operating expenses          |  |        | 18,372  |                 | 9.3   | % |        |   | 16,643          |  | 9.3   | %       |  | 10.4 | %
|General corporate expenses        |  |        | 9,570   |                 | 4.9   | % |        |   | 8,856           |  | 5.0   | %       |  | 8.1  | %
|Depreciation expense              |  |        | 7,001   |                 | 3.6   | % |        |   | 5,934           |  | 3.3   | %       |  | 18.0 | %
|Amortization of intangible assets |  |        | 5,007   |                 | 2.5   | % |        |   | 4,408           |  | 2.5   | %       |  | 13.6 | %
|                                  |  |        |         |                 |       |   |        |   |                 |  |       |         |  |      |  
|Total operating expenses          |  |        | 178,239 |                 | 90.6  | % |        |   | 162,852         |  | 91.2  | %       |  | 9.4  | %
|                                  |  |        |         |                 |       |   |        |   |                 |  |       |         |  |      |  
|Earnings from operations          |  |        | 18,689  |                 | 9.4   | % |        |   | 15,702          |  | 8.8   | %       |  | 19.0 | %
|Interest expense, net             |  |        | 1,804   |                 | 0.9   | % |        |   | 1,592           |  | 0.9   | %       |  | 13.3 | %
|Minority interest                 |  |        | -       |                 | 0.0   | % |        |   | -               |  | 0.0   | %       |  | 0.0  | %
|                                  |  |        |         |                 |       |   |        |   |                 |  |       |         |  |      |  
|Earnings before income taxes      |  |        | 16,885  |                 | 8.5   | % |        |   | 14,110          |  | 7.9   | %       |  | 19.7 | %
|Income taxes                      |  |        | 6,594   |                 | 3.3   | % |        |   | 5,591           |  | 3.1   | %       |  | 17.9 | %
|                                  |  |        |         |                 |       |   |        |   |                 |  |       |         |  |      |  
|Net earnings                      |  | $      | 10,291  |                 | 5.2   | % |        | $ | 8,519           |  | 4.8   | %       |  | 20.8 | %
|                                  |  |        |         |                 |       |   |        |   |                 |  |       |         |  |      |  

Net Revenue

Net revenue increased 10.7% to $217,917,000 in 2006 from $196,928,000 in 2005. This increase was attributable to an 8.2% increase in same market net revenue growth in addition to net revenue earned from our platform affiliations completed
in 2006 and 2005, and to a lesser extent, by an increase in other revenue due to patient revenue earned by Arizonas Tooth Doctor for Kids. Net revenue increased 10.3% to $196,928,000 in 2005 from



28



---

##### Table of Contents

$178,554,000 in 2004. This increase was attributable to an 8.5% increase in same market net revenue growth and incremental net revenue earned from our
platform affiliation completed in February 2005, offset by a decrease in other revenue. The decrease in other revenue in 2005 is primarily attributable to a decrease in dental laboratory fees as a result of an increasing percentage of fees being
earned from our affiliated dental groups. The percentage of lab fees being earned from our affiliated dental groups was 71%, 70% and 63% for 2006, 2005 and 2004, respectively.

Net revenue derived from our service agreement with PDG, P.A., the affiliated practice at Park Dental, represented approximately 29%, 31%, and 32% of our consolidated net revenue for 2006, 2005 and 2004, respectively.
Net revenue from our service agreement with Wisconsin Dental Group, S.C., the affiliated practice at Forward Dental, represented approximately 13% of our consolidated net revenue for each of the years 2006, 2005 and 2004. No other service agreement
or customers accounted for greater than 10% of our consolidated net revenue.

Salaries and Benefits

Salaries and benefits expense includes costs for personnel working at the dental facilities, dental laboratory and local and regional shared service centers. At the
facility level, we generally employ the administrative staff and, where permitted by state law, the hygienists and dental assistants. We also employ the dentists at Tooth Doctor. The personnel at the local and regional shared service centers support
the dental facilities.

Salaries and benefits expense as a percentage of net revenue decreased to 41.9% in 2006 from 42.5% in 2005. This decrease was
primarily attributable to staff productivity increases at the affiliated dental groups and to a lesser extent in-market affiliations completed in 2005 where we do not employ the hygienists and dental assistants, thereby lowering our salaries and
benefits expense in relation to net revenue earned. Salaries and benefits expense as a percentage of net revenue decreased from 43.4% in 2004 to 42.5% in 2005. This decrease was primarily attributable to staff productivity increases, as well as the
impact of our platform affiliation with Premier Dental Partners which is located in Missouri, a state where we do not employ the hygienists and dental assistants.

Lab Fees and Dental Supplies

Lab fees and dental supplies expense varies from affiliate to affiliate and is affected by the volume and
type of procedures performed. Lab fees and dental supplies expense as a percentage of net revenue was 16.1% in 2006 and 2005, and 16.0% in 2004. This percentage has remained relatively constant since 2004 due to increased utilization of our dental
laboratory by the affiliated practices and to a lesser extent our continued focus on managing dental supplies expenses. These expenses are largely impacted by the patient revenue of the affiliated practices and as a percentage of patient revenue was
10.4% in 2006 and 2005, and 10.5% for 2004.

Office Occupancy

Office occupancy expense includes rent expense and certain other operating costs, such as utilities, associated with dental facilities, dental laboratory and the local and regional shared service centers. Such costs vary based on the size
of each facility and the market rental rate for dental office and administrative space in each particular geographic market.

Office occupancy expense as a
percentage of net revenue increased to 12.1% in 2006 from 11.7% in 2005. This increase is primarily due to the relocations of our National Information Systems team and Park Dental resource group at the beginning of 2006, a $234,000 lease buy-out
payment and, to a lesser extent, the full year impact of a relocation of a dental facility in 2005. Office occupancy expense as a percentage of net revenue remained constant at 11.7% for 2005 and 2004. In 2006, we completed three de novo facilities
and expanded nine facilities. In 2005, we completed one de novo facility and relocated and/or expanded seventeen facilities. In 2004, we completed one de novo facility and relocated and/or expanded nineteen facilities.



29



---

##### Table of Contents

Other Operating Expenses

Other operating expenses include non-employment related insurance expense, professional fees, marketing costs and other general and administrative expenses. Other operating expenses as a percentage of net revenue decreased as a percentage
of net revenue to 8.8% in 2006 from 9.3% in 2005. This decrease is due to a decrease in professional fees at the affiliated dental groups, a reduction in other general and administrative expenses and, to a lesser extent, leveraging of these expenses
at the affiliated dental groups, off-set by an increase in computer consulting fees. Other operating expense remained constant as a percentage of net revenue at 9.3% for 2005 and 2004.

General Corporate Expenses

General corporate expenses consist of compensation and travel expenses for our corporate
personnel and administrative staff, facility and other administrative costs of our corporate office and professional fees, including legal and accounting. General corporate expenses as a percentage of net revenue increased to 5.8% in 2006 from 4.9%
in 2005. This increase is due to costs associated with the PDG Litigation (see Legal Proceedings) and stock-based compensation expense. General corporate expense decreased to 4.9% in 2005 from 5.0% in 2004. This decrease in 2005 as a
percent of net revenue was due to a leveraging of our general corporate expenses.

We incurred approximately $1,570,000 in costs associated with the PDG
Litigation in 2006. We anticipate these costs, compared to the same period in 2006, to remain consistent or increase over the first six months of 2007 due to preparation for the trial and the actual trial for the PDG Litigation. The adoption of
Statement of Financial Accounting Standards No. 123(R) Share-based Payment (SFAS No. 123(R)), effective January 1, 2006, resulted in $1,363,000 of stock-based compensation expense, approximately $900,000 net of
tax, in 2006. We anticipate these costs to increase approximately $400,000 in 2007 due to 2007 option grants. Finally, we expect a modest increase in general corporate office occupancy expense in 2007 as we are entering into a new lease in June
2007, for a larger space to accommodate personnel growth at our corporate office.

Depreciation

Depreciation expense, including amortization of leasehold improvements, as a percentage of net revenue remained constant at 3.6% in 2006 and 2005. Depreciation expense
as an expense of net revenue increased to 3.6% of net revenue in 2005 from 3.3% in 2004. The increase in depreciation expense as a percent of net revenue in 2005 primarily related to increased investment in leasehold improvements and dental
equipment and, to a lesser extent, amortization of software development costs relating to Improvis which began in the fourth quarter of 2005. We expect to continue to invest in the development of new dental facilities and the relocation and/or
expansion of existing dental facilities in 2007. Accordingly, depending on the amount and timing of such future capital expenditures, depreciation may increase in 2007 at a rate greater than our net revenue.

Amortization of Service Agreements and Other Intangible Assets

Amortization expense as a percentage of net revenue remained constant at 2.5% in 2006, 2005 and 2004.

Based on an evaluation of historical
financial trends in 2005, we determined that the intangible assets associated with certain in-market affiliations which were combined with existing affiliated practices were expected to generate future cash flows for a longer period than previously
estimated. Accordingly, we increased the amortization period relating to these intangible assets. As a result, the amortization period for certain previously completed in-market affiliations were increased to 25 years. This change in estimate
impacted, at that time, 5% of our intangible assets and had the effect of reducing amortization expense for 2005 by approximately $76,000, or $46,000 net of tax. This change in estimate reduced amortization expense by approximately $152,000, or
$92,000 net of tax, in 2006.



30



---

##### Table of Contents

Amortization of intangible assets may increase in the future as a result of additional intangible assets recorded in
connection with future affiliations and, if applicable and earned, contingent payments on already completed affiliations.

Earnings from Operations

Earnings from operations increased 8.0% to $20,182,000, or 9.3% of net revenue, in 2006 from $18,689,000, or 9.4% of net revenue, in 2005. Earnings
from operations as a percentage of net revenue decreased in 2006 primarily due to costs associated with the PDG Litigation and stock-based compensation in the amounts of $1,570,000 and $1,363,000, respectively. Earnings from operations increased
19.0% to $18,689,000, or 9.4% of net revenue, in 2005 from $15,702,000, or 8.8% of net revenue, in 2004. Earnings from operations as a percentage of net revenue increased in 2005 primarily due to increased productivity as a result of higher same
market growth rates and leveraging of corporate expenses and other costs.

Interest Expense

Net interest expense increased to $1,848,000 in 2006 from $1,804,000 in 2005. The increase in 2006 was due to higher interest rates, off-set by reduced average
borrowings outstanding in 2006 compared to 2005. The increase in 2005 was due to increased borrowings compared to 2004 as well as an increase in LIBOR interest rates. See Item 7. Managements Discussion and Analysis of Financial Condition
and Results of Operations - Liquidity and Capital Resources for more information related to our credit facility.

Minority Interest

On December 1, 2006, we completed the acquisition of the assets of Arizonas Tooth Doctor for Kids. The assets of Tooth Doctor were
contributed to a newly-created subsidiary which is owned 85% by the Company and 15% by the principals of Tooth Doctor. As a result of this transaction we began to consolidate the financial results of Tooth Doctor with our results in December, 2006.
The minority interest represents the gain attributable to the minority shareholders for the period that we consolidated Tooth Doctor.

Income Taxes

Our effective tax rate was 39.1% in 2006 and 2005, and 39.6% in 2004. The decrease in 2005 was due to a reduction in state income taxes. We expect our
effective tax rate to be 40.0% in 2007 due to increases in state income taxes.

Net Earnings

As a result of the foregoing, net earnings increased 8.2% to $11,134,000, or 5.1% of net revenue, in 2006 from $10,291,000, or 5.2% of net revenue, in 2005. The decrease
as a percentage of net revenue is due to the costs associated with the PDG Litigation and stock-based compensation in the amount of $956,000 and $900,000, net of taxes, respectively. Net earnings increased 20.8% to $10,291,000, or 5.2% of net
revenue, in 2005 from $8,519,000, or 4.8% of net revenue, in 2004. In 2005, net earnings reflect our increased earnings from operations and a reduction in our effective tax rate, offset by increased borrowing costs.

Liquidity and Capital Resources

We have financed our operating and
capital needs, including cash used for acquisitions and affiliations, capital expenditures and working capital, principally from operating cash flows and borrowings under our revolving line of credit facility. We have, in the past, also used
proceeds from the sale of equity securities and the issuance of subordinated promissory notes to finance certain capital needs, but have not done so in recent years.

For the years ended December 31, 2006 and 2005, cash provided by operating activities amounted to $31,050,000 and $25,452,000, respectively. In 2006, cash from operations primarily resulted from net earnings
after adding back non-cash items, an increase in accounts payable and a decrease in accounts receivable, primarily receivables due from affiliated practices. The increase in accounts payable is primarily due to the



31



---

##### Table of Contents

timing of payables and an increase in outstanding checks in excess of deposits in transit as of December 31, 2006 as compared to December 31, 2005.
The decrease in receivables due from affiliated practices was primarily due to a continued focus on receivables management at the affiliated practices. The days sales outstanding for the patient receivables of the affiliated practices decreased from
35 days at December 31, 2005 to 32 days at December 31, 2006. For the years ended December 31, 2005 and 2004, cash provided by operating activities amounted to $25,452,000 and $25,405,000, respectively. In 2005, cash from operations
primarily resulted from net earnings after adding back non-cash items and increases in accrued compensation offset by an increase in accounts receivable, primarily receivables due from the affiliated practices. These changes resulted in cash from
operations remaining essentially the same for the years ended December 31, 2005 and 2004.

For the years ended December 31, 2006 and 2005, cash
used for investing activities amounted to $33,902,000 and $32,000,000, respectively. The net increase of approximately $1,900,000 in cash used for investing activities is primarily due to an increase of $9,900,000 in cash used for acquisitions and
affiliations, net of cash acquired, offset by decreases of $4,400,000 in contingent payments made as part of affiliations and $3,800,000 in capital expenditures. The remaining increase is due to other investing activities. The increase in cash paid
for affiliations was due to $18,700,000 of cash consideration paid for the acquisition of Tooth Doctor. The decrease in contingent payments is due to a $4,790,000 contingent payment made in 2005 as a result of a 2002 affiliation. In addition,
approximately $1,300,000 in contingent payments as a result of 2005 affiliations were accrued for as of December 31, 2006, and will be paid in the first quarter of 2007. Capital expenditures decreased due to project timing as approximately
$4,000,000 of relocation and/or expansion projects have been extended into 2007. Consequently, we expect capital expenditures in 2007 to increase significantly to approximately $14,000,000 in capital expenditures, which includes the carryover of
2006 projects, the relocation and/or expansion of existing dental facilities, our on-going facility maintenance capital expenditure program and investment in several information technology projects. For the years ended December 31, 2005 and
2004, cash used for investing activities amounted to $32,000,000 and $13,109,000, respectively. The increase of approximately $18,900,000 in cash used for investing activities is due to an increase of $12,700,000 in cash used for affiliations, net
of cash acquired, an increase of approximately $4,700,000 in contingent payments made as part of affiliations and, to a lesser extent, an increase of approximately $1,400,000 in capital expenditures. The remaining increase is due to other investing
activities. The increase in cash used for affiliations, net of cash acquired, was due to the completion of nine in-market affiliations and one platform affiliation in 2005 compared to five in-market affiliations completed in 2004. The increase in
contingent payments was due to the aforementioned $4,790,000 contingent payment made in 2005.

For the years ended December 31, 2006 and 2005, cash
provided by financing activities amounted to $3,646,000 and $5,762,000, respectively. The decrease of $2,100,000 in cash provided by financing activities is primarily due to less borrowing on our revolving credit facility of $3,000,000 during 2006,
offset by a decrease of $1,100,000 in repayments of subordinated debt in 2006 compared to 2005. The remaining decrease in cash provided by financing activities is due to $1,100,000 less in proceeds from the issuance of common stock for the exercise
of stock options in 2006 offset by $565,000 in tax benefits recognized on the exercise of stock options and $176,000 in cash used for payment of debt issuance costs in 2005. Borrowing on our credit facility decreased in 2006 due to our ability to
use cash provided by operations to pay for affiliations in 2006 to a greater extent than 2005. Repayments of subordinated debt decreased in 2006 due to the fact that we have not used subordinated debt as consideration for affiliations since 2003.
Proceeds from the exercise of stock options decreased in 2006 due to a reduced number of option exercises compared to 2005, which was off-set by a change in classification of tax benefits on the exercise of stock option from cash provided by
operating activities to cash provided by financing activities as a result of the adoption, on January 1, 2006, of SFAS No. 123(R) Share-Based Payment. For the year ended December 31, 2005, cash provided by financing
activities amounted to $5,762,000, and cash used for financing activities for the year ended December 31, 2004 was $12,813,000. The primary reason for the difference between the two periods is the aforementioned increase in affiliation activity
during 2005 compared to 2004. In 2005 we borrowed $4,900,000 on the revolving credit facility to finance affiliations, while in 2004 the size and number of affiliations allowed us to pay down approximately $12,500,000 on our credit facility.



32



---

##### Table of Contents

We have a $70,000,000 revolving credit facility that we use for general corporate purposes, including working capital,
acquisitions, affiliations and capital expenditures. The facility had an original maturity date of February 2008 and maximum borrowings under the line were scheduled to decrease to $65,000,000 in February 2007. The outstanding balance under this
line as of December 31, 2006 was $33,700,000, and we had a stand-by letter of credit amounting to $650,000 at December 31, 2006. The unused balance under this line as of December 31, 2006 was $36,300,000 and based on borrowing
covenants, reduced by the stand-by letter of credit, $35,462,000 was available for borrowing. On February 21, 2007, we amended our credit facility as a result of favorable credit markets and our improved financial position and extended the
maturity to February 2012. Amendments to the original facility included an increase in the facility capacity to $75,000,000, a decrease in the interest margin and a decrease in our commitment fees. Borrowings under the credit facility bear interest
at either prime or LIBOR plus a margin, at our option. The margin is based upon our debt coverage ratio and ranges from 0.0% to 0.875% for prime borrowings and 0.875% to 1.875% for LIBOR borrowings. At December 31, 2006, the LIBOR interest rate
under the credit facility, including borrowing margin, was approximately 6.35% and the prime interest rate under the credit facility was 8.25%. In addition, we pay a commitment fee on the unused balance of our credit facility ranging from 0.20% to
0.50%. Borrowings are limited to an availability formula based on earnings before income taxes, depreciation and amortization, adjusted for certain items, and are collateralized by a first lien on substantially all of our assets, including a pledge
of the stock of our subsidiaries. We are also required to comply with financial and other covenants, including minimum net worth, leverage and fixed charge coverage ratios and maximum capital expenditures as defined by the credit agreement. We were
in compliance with our covenants as of December 31, 2006.

Our growth to date has resulted in large measure from our ability to affiliate with
additional dental practices. Historically, we have used a combination of cash, debt and, to a lesser extent, common stock as consideration for past affiliations. In recent years, the consideration paid has consisted of cash. We intend to continue to
use cash flow from operations and our revolving credit facility to provide funding for future affiliations. If cash flow from operations is not sufficient or debt financing is not available as needed on terms acceptable to us, we may have to issue
or sell equity securities or, if unsuccessful, modify our affiliation strategy. We are constantly evaluating potential affiliations with dental practices that would expand our business as well as possible acquisitions of businesses that would
broaden our business capabilities. The number of practice affiliations over the next twelve months could be at levels greater than we have achieved during each of the past two years. We believe that cash generated from operations and amounts
available under our current revolving credit facility will be sufficient to fund our anticipated cash needs for working capital, capital expenditures, affiliations and acquisitions for at least the next year.

Contractual Obligations

A summary of our contractual obligations as
of December 31, 2006 is as follows (in thousands):



|                              |  |                        |         |      |   |           |  |           |        |            |   |        |  |   |       
|----------------------------- |  | ---------------------- | ------- | ---- | - | --------- |  | --------- | ------ | ---------- | - | ------ |  | - | ------
|                              |  | Payments due by period
|                              |  | Total                  |         | 2007 |   | 2008-2009 |  | 2010-2011 |        | Thereafter
|Long-term debt (1)            |  | $                      | 188     |      | $ | 81        |  | $         | 71     |            | $ | 36     |  | $ | -     
|Revolving credit facility (2) |  |                        | 33,700  |      |   | -         |  |           | 33,700 |            |   | -      |  |   | -     
|Operating leases (3)          |  |                        | 85,317  |      |   | 15,367    |  |           | 25,376 |            |   | 17,560 |  |   | 27,014
|                              |  |                        |         |      |   |           |  |           |        |            |   |        |  |   |       
|Total                         |  | $                      | 119,205 |      | $ | 15,448    |  | $         | 59,147 |            | $ | 17,596 |  | $ | 27,014
|                              |  |                        |         |      |   |           |  |           |        |            |   |        |  |   |       

(1) In addition to these contractual obligations, future interest payments relating to our
long-term debt are fixed at a rate of 7% and are due as follows: $13 in 2007, $12 in 2008-2009, $2 in 2010-2011.

(2) Future interest
obligations relating to our revolving credit facility are not determinable as the interest rate is variable and the agreement does not include a required principal repayment schedule. We have not historically hedged our interest rate exposure and
the principal balance fluctuates daily. For additional information relating to our revolving credit facility, refer to Note 8 in the Notes to Consolidated Financial Statements. Table does not reflect the February 21, 2007 amendment to credit
facility extending its maturity to February 2012.

(3) Operating lease payments include amounts which are to be reimbursed to us pursuant to
the terms of our service agreements with the affiliated practices. The amounts to be reimbursed by the affiliated practices are $76,995 and are due as follows: $14,017 in 2007, $23,267 in 2008-2009, $15,800 in 2010-2011, and $23,911 thereafter.



33



---

##### Table of Contents

Critical Accounting Policies and Estimates

The preparation of consolidated financial statements requires management to make estimates and judgments that affect the reported amounts of assets, liabilities, revenues and expenses. On an on-going basis management
evaluates its estimates, including those related to the carrying value of receivables due from affiliated practices, goodwill, other intangible assets and loss reserves for our captive insurance company. Management bases its estimates on historical
experience, on various other assumptions that are believed to be reasonable under the circumstances and in certain instances actuarial studies conducted by third parties, the results of which form the basis for making judgments about carrying values
of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates under different assumptions or conditions.

We have identified the policies below as critical to our business operations and the understanding of our results of operations.

Valuation of Accounts Receivable

The Companys carrying amount of receivables due from affiliated practices, that have entered into
service agreements with us, requires management to assess the collectability of our business service fees. Our service fees are dependent on the economic viability of the affiliated practices based on actual and expected future financial performance
including collectability of the affiliated practices patient receivables, net of contractual adjustments and allowances for doubtful accounts. To date we have not recorded any losses related to our receivables due from affiliated practices.

The affiliated practices record revenue at established rates reduced by contractual adjustments and allowances for doubtful accounts to arrive at patient
revenue. Contractual adjustments represent the difference between gross billable charges at established rates and the portion of those charges reimbursed pursuant to certain dental benefit plan provider contracts. For contracts where there is no
defined benefit, contractual adjustments are based upon historical collection experience and other relevant factors. The affiliated practices provision for doubtful accounts is estimated in the period that services are rendered and adjusted in
future periods as necessary. The estimates for the provision and related allowance are based on an evaluation of historical collection experience, the aging profile of the accounts receivable, write-off percentages and other relevant factors.
Changes in these factors in future periods could result in increases or decreases in the provision. In the event that final reimbursement or bad debt experience differs from original estimates, adjustments to the affiliated practices patient
receivables would be required.

Service Agreements and Intangible Assets

The Companys affiliations with dental group practices as a result of the parties entering into a service agreement are not business combinations, and as such, do not result in recognition of goodwill. The
Company recognizes capitalized service agreement costs which are accounted for as definite-lived intangible assets acquired in other than a business combination, and recorded at fair value. In determining the fair value of a service agreement
recognized in connection with an affiliation, management estimates the timing, amount and value of future expected cash flows.

These service agreements
have contractual terms of 40 years but the asset is generally amortized on a straight-line basis over a period of 25 years. Customer relationship intangible assets associated with the acquisition of dental laboratories are amortized on a
straight-line basis over 15 years. Intangible assets assigned to trade name as a result of the acquisition of Tooth Doctor are indefinite-lived and not amortized. In the event a service agreement is terminated, the related affiliated practice is
required, at the Companys option in nearly all instances, to purchase the remaining unamortized balance of intangible assets at the current book value, purchase other assets at the greater of fair value or book value, and assume leases and
other liabilities related to the performance of the Companys obligations under the service agreement.

Management performs an impairment test on
definite-lived intangible assets when facts and circumstances exist which would suggest that the intangible assets may be impaired, by comparing the undiscounted net cash flows



34



---

##### Table of Contents

of the asset to its carrying value. If impairment were determined, an appropriate adjustment to the intangible asset would be made to reduce the assets
carrying value to fair value. Fair value is determined by calculating the projected discounted operating net cash flows of the asset using a discount rate reflecting the Companys average cost of funds. The Company has not recorded any
impairment charges or write-downs on definite-lived intangibles as of December 31, 2006.

Insurance

We maintain various insurance coverages for our business, including property-casualty, business interruption, workers compensation and general liability, among others.
In addition, the affiliated practices are required to maintain, or cause to be maintained, professional liability insurance with us as a named insured. Beginning in 2007, certain of our insurances will be reinsured by a wholly-owned captive
insurance company licensed in the state of Vermont. Several of these insurance programs have retention levels in which we and our captive insurance company are financially obligated for insured losses below certain financial thresholds before the
insurer is financially obligated for insured losses. We and our captive insurance company maintain reserves for certain of these programs, which are based upon estimates provided by third-party actuaries or by individual case-basis valuations.
Changes in trends of loss severity or loss frequency may affect the calculation of these estimates and create the need for subsequent adjustments to estimated loss reserves.

Stock-Based Compensation

We account for stock-based compensation in accordance with the fair value recognition
provision of SFAS No. 123(R). We use the Black-Scholes option-pricing model, which requires the input of subjective assumptions. These assumptions include: estimating the length of time employees will retain their vested stock options before
exercising them (expected life), the estimated volatility of our common stock price over the expected life (volatility), and the number of options that will ultimately not complete their vesting requirements (forfeitures). Changes in these
assumptions for future stock option grants can materially affect the estimate of fair value of stock-based compensation.

Recent Accounting
Pronouncements

In July 2006, the Financial Accounting Standards Board (FASB) issued FASB Interpretation No. 48, Accounting for
Uncertainty in Income Taxes  an interpretation of FASB Statement No. 109 (FIN 48), which clarifies the accounting and disclosure for uncertainty in tax positions, as defined. FIN 48 seeks to reduce the
diversity in practice associated with certain aspects of the recognition and measurement related to accounting for income taxes. This interpretation is effective for fiscal years beginning after December 15, 2006. We do not expect the
interpretation will have a material impact on our results from operations or financial position.

In September 2006, the FASB issued statement
No. 157, Fair Value Measurements,(SFAS 157). SFAS 157 defines fair value, establishes a framework for measuring fair value in accordance with accounting principles generally accepted in the United
States, and expands disclosures about fair value measurements. SFAS 157 is effective for fiscal years beginning after November 15, 2007, with earlier application encouraged. Any amounts recognized upon adoption as a cumulative effect
adjustment will be recorded to the opening balance of retained earnings in the year of adoption. We have not yet determined the impact of this Statement on our financial condition and results of operations.



35



---

##### Table of Contents

ITEM 7A.    QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

In the ordinary course of
business, we are exposed to interest rate risk. With regard to our revolving credit facility, we are also exposed to variable rate interest for the banks applicable margins, ranging from 0.875% to 1.875% based upon our debt coverage ratio. For
fixed rate debt, interest rate changes affect the fair value but do not impact earnings or cash flow. Conversely, for floating rate debt, interest rate changes generally do not affect the fair market value but do impact future earnings and cash
flow. We do not believe a one percentage point change in interest rates would have a material impact on the fair market value of our fixed rate debt. The pre-tax earnings and cash flow impact for one year based upon the amounts outstanding at
December 31, 2006 under our variable rate revolving credit facility for each one percentage point change in interest rates would be approximately $337,000 per annum. We do not presently undertake any specific actions to cover our exposure to
interest rate risk and we are not party to any interest rate risk management transactions.



36



---

##### Table of Contents

ITEM 8.  FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

Index to Financial Statements



|                                                                 |  |     
|---------------------------------------------------------------- |  | ----
|                                                                 |  | Page
|Consolidated Financial Statements                                |  |     
|                                                                 | 
|Managements Report on Internal Control Over Financial Reporting |  | 38  
|                                                                 | 
|Reports of Independent Registered Public Accounting Firm         |  | 39  
|                                                                 | 
|Consolidated Balance Sheets                                      |  | 41  
|                                                                 | 
|Consolidated Statements of Income                                |  | 42  
|                                                                 | 
|Consolidated Statements of Changes in Stockholders Equity       |  | 43  
|                                                                 | 
|Consolidated Statements of Cash Flows                            |  | 44  
|                                                                 | 
|Notes to Consolidated Financial Statements                       |  | 45  
|                                                                 | 
|Financial Statement Schedules                                    |  |     
|                                                                 | 
|Not Applicable.                                                  |  |     



37



---

##### Table of Contents

Managements Report on Internal Control Over Financial Reporting

The Companys management is responsible for
establishing and maintaining adequate internal control over financial reporting as defined in Rules 13a-15(f) promulgated under the Securities Exchange Act of 1934, as amended. As required by Rule 13a-15(c) under the Exchange Act, the Companys
management evaluated the effectiveness of the design and operation of its internal control over financial reporting based on the framework in Internal Control - Integrated Frameworkissued by the Committee of Sponsoring Organizations of the
Treadway Commission. Based on that evaluation, the Companys management concluded that the Companys internal control over financial reporting as of December 31, 2006 was effective to provide reasonable assurance regarding the
reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. We have excluded certain elements of the internal control over financial reporting of
Arizonas Tooth Doctor for Kids, an 85% owned subsidiary, from our assessment of internal control over financial reporting as of December 31, 2006 because it was acquired by us in a business combination during fiscal 2006. The excluded
elements represent controls over accounts of approximately 11.5% of consolidated assets and 0.7% of consolidated revenues for the year ended December 31, 2006. Arizonas Tooth Doctor for Kids will be included in our fiscal 2007 evaluation.

Managements assessment of the effectiveness of the Companys internal control over financial reporting as of December 31, 2006 has been
audited by PricewaterhouseCoopers LLP, an independent registered public accounting firm, as stated in their report which appears herein.



38



---

##### Table of Contents

Report of Independent Registered Public Accounting Firm

To the Board of Directors and Stockholders of American Dental
Partners, Inc:

We have completed integrated audits of American Dental Partners Inc.s consolidated financial statements and of its internal control
over financial reporting as of December 31, 2006, in accordance with the standards of the Public Company Accounting Oversight Board (United States). Our opinions, based on our audits, are presented below.

Consolidated financial statements

In our opinion, the consolidated
financial statements listed in the accompanying index present fairly, in all material respects, the financial position of American Dental Partners, Inc. (the Company) at December 31, 2006 and 2005, and the results of their
operations and their cash flows for each of the three years in the period ended December 31, 2006 in conformity with accounting principles generally accepted in the United States of America. These financial statements are the responsibility of
the Companys management. Our responsibility is to express an opinion on these financial statements based on our audits. We conducted our audits of these statements in accordance with the standards of the Public Company Accounting Oversight
Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit of financial statements includes examining, on a test
basis, evidence supporting the amounts and disclosures in the financial statements, assessing the accounting principles used and significant estimates made by management, and evaluating the overall financial statement presentation. We believe that
our audits provide a reasonable basis for our opinion.

As discussed in Notes 2 and 11 to the consolidated financial statements, the Company adopted the
provisions of Statement of Financial Accounting Standards (SFAS) No. 123(R), Share Based Payments.

Internal control
over financial reporting

Also, in our opinion, managements assessment, included in Managements Report on Internal Controls Over Financial
Reporting appearing in Item 8, that the Company maintained effective internal control over financial reporting as of December 31, 2006, based on criteria established in Internal Control - Integrated Framework issued by the Committee
of Sponsoring Organizations of the Treadway Commission (COSO), is fairly stated, in all material respects, based on those criteria. Furthermore, in our opinion, the Company maintained, in all material respects, effective internal control over
financial reporting as of December 31, 2006, based on criteria established in Internal Control - Integrated Framework issued by COSO. The Companys management is responsible for maintaining effective internal control over financial
reporting and for its assessment of the effectiveness of internal control over financial reporting. Our responsibility is to express opinions on managements assessment and on the effectiveness of the Companys internal control over
financial reporting based on our audit. We conducted our audit of internal control over financial reporting in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and
perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. An audit of internal control over financial reporting includes obtaining an understanding of
internal control over financial reporting, evaluating managements assessment, testing and evaluating the design and operating effectiveness of internal control, and performing such other procedures as we consider necessary in the
circumstances. We believe that our audit provides a reasonable basis for our opinions.

A companys internal control over financial reporting is a
process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A companys
internal control over financial reporting includes those policies and procedures that (i) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the
company; (ii) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance



39



---

##### Table of Contents

with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of
management and directors of the company; and (iii) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the companys assets that could have a material effect on the
financial statements.

As described in Managements Report on Internal Control Over Financial Reporting, management has excluded Tooth Doctor from its
assessment of internal control over financial reporting as of December 31, 2006 because it was acquired by the Company in a purchase business combination during 2006. We have also excluded Tooth Doctor from our audit of internal control over
financial reporting. Tooth Doctor is an 85% owned subsidiary whose total assets and total revenues represent 11.5% and 0.7%, respectively, of the related consolidated financial statement amounts as of and for the year ended December 31, 2006.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any
evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

/s/ PricewaterhouseCoopers LLP

Boston, Massachusetts

March 9, 2007



40



---

##### Table of Contents

AMERICAN DENTAL PARTNERS, INC.

CONSOLIDATED BALANCE SHEETS



|                                                                                                                                                                                                                      |  |                |         |   |      |   |         |  
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |  | -------------- | ------- | - | ---- | - | ------- | -
|                                                                                                                                                                                                                      |  | December 31,   |        
|                                                                                                                                                                                                                      |  | 2006           |         |   | 2005 |  
|                                                                                                                                                                                                                      |  | (In thousands) |        
|ASSETS                                                                                                                                                                                                                |  |                |         |   |      |   |         |  
|Current assets:                                                                                                                                                                                                       |  |                |         |   |      |   |         |  
|Cash and cash equivalents                                                                                                                                                                                             |  | $              | 1,386   |   |      | $ | 592     |  
|Accounts receivable, net                                                                                                                                                                                              |  |                | 16,373  |   |      |   | 15,155  |  
|Inventories                                                                                                                                                                                                           |  |                | 2,136   |   |      |   | 2,080   |  
|Prepaid expenses and other current assets                                                                                                                                                                             |  |                | 2,522   |   |      |   | 1,824   |  
|Prepaid/refundable income taxes                                                                                                                                                                                       |  |                | 267     |   |      |   | 915     |  
|Deferred income taxes                                                                                                                                                                                                 |  |                | 1,935   |   |      |   | 1,743   |  
|                                                                                                                                                                                                                      |  |                |         |   |      |   |         |  
|Total current assets                                                                                                                                                                                                  |  |                | 24,619  |   |      |   | 22,309  |  
|                                                                                                                                                                                                                      |  |               
|Property and equipment, net                                                                                                                                                                                           |  |                | 46,460  |   |      |   | 45,184  |  
|                                                                                                                                                                                                                      |  |               
|Non-current assets:                                                                                                                                                                                                   |  |                |         |   |      |   |         |  
|Goodwill                                                                                                                                                                                                              |  |                | 23,091  |   |      |   | 5,095   |  
|Service agreements and other intangibles, net                                                                                                                                                                         |  |                | 101,113 |   |      |   | 97,260  |  
|Other                                                                                                                                                                                                                 |  |                | 537     |   |      |   | 798     |  
|                                                                                                                                                                                                                      |  |                |         |   |      |   |         |  
|Total non-current assets                                                                                                                                                                                              |  |                | 124,741 |   |      |   | 103,153 |  
|                                                                                                                                                                                                                      |  |                |         |   |      |   |         |  
|Total assets                                                                                                                                                                                                          |  | $              | 195,820 |   |      | $ | 170,646 |  
|                                                                                                                                                                                                                      |  |                |         |   |      |   |         |  
|LIABILITIES AND STOCKHOLDERS EQUITY                                                                                                                                                                                  |  |                |         |   |      |   |         |  
|Current liabilities:                                                                                                                                                                                                  |  |                |         |   |      |   |         |  
|Accounts payable                                                                                                                                                                                                      |  | $              | 11,279  |   |      | $ | 6,929   |  
|Accrued compensation and benefits                                                                                                                                                                                     |  |                | 10,967  |   |      |   | 8,197   |  
|Accrued expenses                                                                                                                                                                                                      |  |                | 7,105   |   |      |   | 5,005   |  
|Current maturities of debt                                                                                                                                                                                            |  |                | 81      |   |      |   | 123     |  
|                                                                                                                                                                                                                      |  |                |         |   |      |   |         |  
|Total current liabilities                                                                                                                                                                                             |  |                | 29,432  |   |      |   | 20,254  |  
|Non-current liabilities:                                                                                                                                                                                              |  |                |         |   |      |   |         |  
|Long-term debt                                                                                                                                                                                                        |  |                | 33,807  |   |      |   | 32,039  |  
|Deferred income taxes                                                                                                                                                                                                 |  |                | 15,874  |   |      |   | 16,185  |  
|Other liabilities                                                                                                                                                                                                     |  |                | 342     |   |      |   | 273     |  
|                                                                                                                                                                                                                      |  |                |         |   |      |   |         |  
|Total non-current liabilities                                                                                                                                                                                         |  |                | 50,023  |   |      |   | 48,497  |  
|                                                                                                                                                                                                                      |  |                |         |   |      |   |         |  
|Total liabilities                                                                                                                                                                                                     |  |                | 79,455  |   |      |   | 68,751  |  
|                                                                                                                                                                                                                      |  |                |         |   |      |   |         |  
|Minority interest                                                                                                                                                                                                     |  |                | 54      |   |      |   | -       |  
|                                                                                                                                                                                                                      |  |               
|Commitments and contingencies                                                                                                                                                                                         |  |                |         |   |      |   |         |  
|                                                                                                                                                                                                                      |  |               
|Stockholders equity:                                                                                                                                                                                                 |  |                |         |   |      |   |         |  
|Preferred stock, par value $0.01 per share, 1,000,000 shares authorized, no shares issued or outstanding                                                                                                              |  |                | -       |   |      |   | -       |  
|Common stock, par value $0.01 per share, 25,000,000 shares authorized, 12,991,137 and 12,840,004 shares issued; 12,408,637 and 12,257,504
shares outstanding at December 31, 2006 and December 31, 2005, respectively |  |                | 130     |   |      |   | 128     |  
|Additional paid-in capital                                                                                                                                                                                            |  |                | 61,257  |   |      |   | 57,977  |  
|Treasury stock, at cost (582,500 shares)                                                                                                                                                                              |  |                | (3,874  | ) |      |   | (3,874  | )
|Retained earnings                                                                                                                                                                                                     |  |                | 58,798  |   |      |   | 47,664  |  
|                                                                                                                                                                                                                      |  |                |         |   |      |   |         |  
|Total stockholders equity                                                                                                                                                                                            |  |                | 116,311 |   |      |   | 101,895 |  
|                                                                                                                                                                                                                      |  |                |         |   |      |   |         |  
|Total liabilities and stockholders equity                                                                                                                                                                            |  | $              | 195,820 |   |      | $ | 170,646 |  
|                                                                                                                                                                                                                      |  |                |         |   |      |   |         |  

See accompanying notes to consolidated financial statements.



41



---

##### Table of Contents

AMERICAN DENTAL PARTNERS, INC.

CONSOLIDATED STATEMENTS OF INCOME



|                                            |  |                                          |         |      |   |         |  |   |        
|------------------------------------------- |  | ---------------------------------------- | ------- | ---- | - | ------- |  | - | -------
|                                            |  | Years Ended December 31,                
|                                            |  | 2006                                     |         | 2005 |   | 2004   
|                                            |  | (In thousands, except per share amounts)
|Net revenue                                 |  | $                                        | 217,917 |      | $ | 196,928 |  | $ | 178,554
|Operating expenses:                         |  |                                          |         |      |   |         |  |   |        
|Salaries and benefits                       |  |                                          | 91,282  |      |   | 83,638  |  |   | 77,489 
|Lab fees and dental supplies                |  |                                          | 35,066  |      |   | 31,638  |  |   | 28,566 
|Office occupancy                            |  |                                          | 26,404  |      |   | 23,013  |  |   | 20,956 
|Other operating expense                     |  |                                          | 19,084  |      |   | 18,372  |  |   | 16,643 
|General corporate expense                   |  |                                          | 12,696  |      |   | 9,570   |  |   | 8,856  
|Depreciation                                |  |                                          | 7,845   |      |   | 7,001   |  |   | 5,934  
|Amortization of intangible assets           |  |                                          | 5,358   |      |   | 5,007   |  |   | 4,408  
|                                            |  |                                          |         |      |   |         |  |   |        
|Total operating expenses                    |  |                                          | 197,735 |      |   | 178,239 |  |   | 162,852
|                                            |  |                                          |         |      |   |         |  |   |        
|Earnings from operations                    |  |                                          | 20,182  |      |   | 18,689  |  |   | 15,702 
|Interest expense                            |  |                                          | 1,848   |      |   | 1,804   |  |   | 1,592  
|Minority interest                           |  |                                          | 54      |      |   | -       |  |   | -      
|                                            |  |                                          |         |      |   |         |  |   |        
|Earnings before income taxes                |  |                                          | 18,280  |      |   | 16,885  |  |   | 14,110 
|Income taxes                                |  |                                          | 7,146   |      |   | 6,594   |  |   | 5,591  
|                                            |  |                                          |         |      |   |         |  |   |        
|Net earnings                                |  | $                                        | 11,134  |      | $ | 10,291  |  | $ | 8,519  
|                                            |  |                                          |         |      |   |         |  |   |        
|Net earnings per common share:              |  |                                          |         |      |   |         |  |   |        
|Basic                                       |  | $                                        | 0.91    |      | $ | 0.86    |  | $ | 0.75   
|                                            |  |                                          |         |      |   |         |  |   |        
|Diluted                                     |  | $                                        | 0.86    |      | $ | 0.81    |  | $ | 0.70   
|                                            |  |                                          |         |      |   |         |  |   |        
|Weighted average common shares outstanding: |  |                                          |         |      |   |         |  |   |        
|Basic                                       |  |                                          | 12,301  |      |   | 12,006  |  |   | 11,372 
|                                            |  |                                          |         |      |   |         |  |   |        
|Diluted                                     |  |                                          | 12,916  |      |   | 12,716  |  |   | 12,102 
|                                            |  |                                          |         |      |   |         |  |   |        

See accompanying notes to consolidated financial statements.



42



---

##### Table of Contents

AMERICAN DENTAL PARTNERS, INC.

CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS EQUITY

(in thousands)



|                                                                                       |  |                   |  |                        |   |  |             |     |                          |   |                  |  |                      |        |  |                          |        |   |  |   |        
|-------------------------------------------------------------------------------------- |  | ----------------- |  | ---------------------- | - |  | ----------- | --- | ------------------------ | - | ---------------- |  | -------------------- | ------ |  | ------------------------ | ------ | - |  | - | -------
|                                                                                       |  | Number of Shares  |  |                        |   |  |             |     |                          |   |                  |  |                      |       
|                                                                                       |  | CommonStockIssued |  | CommonStock inTreasury |   |  | CommonStock |     | AdditionalPaid-InCapital |   | RetainedEarnings |  | TreasuryStock atCost |        |  | TotalStockholdersEquity
|Balance at December 31, 2003                                                           |  | 11,612            |  | (582                   | ) |  | $           | 116 |                          | $ | 48,796           |  | $                    | 28,854 |  | $                        | (3,874 | ) |  | $ | 73,892 
|Issuance of common stock for employee stock purchase plan                              |  | 46                |  | -                      |   |  |             | 1   |                          |   | 261              |  |                      | -      |  |                          | -      |   |  |   | 262    
|Issuance of common stock for exercised stock options, including tax benefit of $2,406  |  | 747               |  | -                      |   |  |             | 7   |                          |   | 4,527            |  |                      | -      |  |                          | -      |   |  |   | 4,534  
|Net earnings                                                                           |  | -                 |  | -                      |   |  |             | -   |                          |   | -                |  |                      | 8,519  |  |                          | -      |   |  |   | 8,519  
|                                                                                       |  |                   |  |                        |   |  |             |     |                          |   |                  |  |                      |        |  |                          |        |   |  |   |        
|Balance at December 31, 2004                                                           |  | 12,405            |  | (582                   | ) |  |             | 124 |                          |   | 53,584           |  |                      | 37,373 |  |                          | (3,874 | ) |  |   | 87,207 
|Issuance of common stock for employee stock purchase plan                              |  | 35                |  | -                      |   |  |             | -   |                          |   | 364              |  |                      | -      |  |                          | -      |   |  |   | 364    
|Issuance of common stock for exercised stock options, including tax benefit of $2,079  |  | 400               |  | -                      |   |  |             | 4   |                          |   | 4,029            |  |                      | -      |  |                          | -      |   |  |   | 4,033  
|Net earnings                                                                           |  | -                 |  | -                      |   |  |             | -   |                          |   | -                |  |                      | 10,291 |  |                          | -      |   |  |   | 10,291 
|                                                                                       |  |                   |  |                        |   |  |             |     |                          |   |                  |  |                      |        |  |                          |        |   |  |   |        
|Balance at December 31, 2005                                                           |  | 12,840            |  | (582                   | ) |  |             | 128 |                          |   | 57,977           |  |                      | 47,664 |  |                          | (3,874 | ) |  |   | 101,895
|Issuance of common stock for employee stock purchase plan including tax benefit of $14 |  | 35                |  | -                      |   |  |             | 1   |                          |   | 486              |  |                      | -      |  |                          | -      |   |  |   | 487    
|Issuance of common stock for exercised stock options, including tax benefit of $565    |  | 116               |  | -                      |   |  |             | 1   |                          |   | 1,431            |  |                      | -      |  |                          | -      |   |  |   | 1,432  
|Stock-based compensation expense                                                       |  |                   |  |                        |   |  |             |     |                          |   | 1,363            |  |                      |        |  |                          |        |   |  |   | 1,363  
|Net earnings                                                                           |  | -                 |  | -                      |   |  |             | -   |                          |   | -                |  |                      | 11,134 |  |                          | -      |   |  |   | 11,134 
|                                                                                       |  |                   |  |                        |   |  |             |     |                          |   |                  |  |                      |        |  |                          |        |   |  |   |        
|Balance at December 31, 2006                                                           |  | 12,991            |  | (582                   | ) |  | $           | 130 |                          | $ | 61,257           |  | $                    | 58,798 |  | $                        | (3,874 | ) |  | $ | 116,311
|                                                                                       |  |                   |  |                        |   |  |             |     |                          |   |                  |  |                      |        |  |                          |        |   |  |   |        

See accompanying notes to consolidated financial statements.



43



---

##### Table of Contents

AMERICAN DENTAL PARTNERS, INC.

CONSOLIDATED STATEMENTS OF CASH FLOWS



|                                                                                    |  |                          |         |   |      |   |         |      |  |   |         |  
|----------------------------------------------------------------------------------- |  | ------------------------ | ------- | - | ---- | - | ------- | ---- |  | - | ------- | -
|                                                                                    |  | Years Ended December 31, |        
|                                                                                    |  | 2006                     |         |   | 2005 |   |         | 2004 | 
|                                                                                    |  | (In thousands)           |        
|Cash flows from operating activities:                                               |  |                          |         |   |      |   |         |      |  |   |         |  
|Net earnings                                                                        |  | $                        | 11,134  |   |      | $ | 10,291  |      |  | $ | 8,519   |  
|Adjustments to reconcile net earnings to net cash provided by operating activities: |  |                          |         |   |      |   |         |      |  |   |         |  
|Depreciation                                                                        |  |                          | 7,845   |   |      |   | 7,001   |      |  |   | 5,934   |  
|Stock-based compensation                                                            |  |                          | 1,363   |   |      |   | -       |      |  |   | -       |  
|Tax benefit realized on exercise of stock options                                   |  |                          | -       |   |      |   | 2,079   |      |  |   | 2,406   |  
|Minority interest                                                                   |  |                          | 54      |   |      |   | -       |      |  |   | -       |  
|Amortization of intangible assets                                                   |  |                          | 5,358   |   |      |   | 5,007   |      |  |   | 4,408   |  
|Other amortization                                                                  |  |                          | 165     |   |      |   | 222     |      |  |   | 224     |  
|Deferred income tax provision/(benefit)                                             |  |                          | (501    | ) |      |   | (384    | )    |  |   | 1,807   |  
|(Gain)/loss on disposal of property and equipment                                   |  |                          | (1      | ) |      |   | 60      |      |  |   | 99      |  
|Changes in assets and liabilities, net of acquisitions and affiliations:            |  |                          |         |   |      |   |         |      |  |   |         |  
|Accounts receivable, net                                                            |  |                          | 929     |   |      |   | (1,015  | )    |  |   | 3,161   |  
|Other current assets                                                                |  |                          | (350    | ) |      |   | 165     |      |  |   | 305     |  
|Accounts payable and accrued expenses                                               |  |                          | 3,745   |   |      |   | 14      |      |  |   | (385    | )
|Accrued compensation and benefits                                                   |  |                          | 541     |   |      |   | 1,585   |      |  |   | 174     |  
|Income taxes payable/refundable, net                                                |  |                          | 650     |   |      |   | 402     |      |  |   | (1,313  | )
|Other, net                                                                          |  |                          | 118     |   |      |   | 25      |      |  |   | 66      |  
|                                                                                    |  |                          |         |   |      |   |         |      |  |   |         |  
|Net cash provided by operating activities                                           |  |                          | 31,050  |   |      |   | 25,452  |      |  |   | 25,405  |  
|                                                                                    |  |                          |        
|Cash flows from investing activities:                                               |  |                          |         |   |      |   |         |      |  |   |         |  
|Cash paid for affiliation transactions                                              |  |                          | (25,852 | ) |      |   | (15,941 | )    |  |   | (3,239  | )
|Capital expenditures, net                                                           |  |                          | (7,243  | ) |      |   | (11,068 | )    |  |   | (9,657  | )
|Proceeds from the sale of property and equipment                                    |  |                          | -       |   |      |   | 121     |      |  |   | 36      |  
|Contingent and deferred payments                                                    |  |                          | (474    | ) |      |   | (4,848  | )    |  |   | (163    | )
|Payment of affiliation costs                                                        |  |                          | (333    | ) |      |   | (264    | )    |  |   | (86     | )
|                                                                                    |  |                          |         |   |      |   |         |      |  |   |         |  
|Net cash used for investing activities                                              |  |                          | (33,902 | ) |      |   | (32,000 | )    |  |   | (13,109 | )
|                                                                                    |  |                          |        
|Cash flows from financing activities:                                               |  |                          |         |   |      |   |         |      |  |   |         |  
|Borrowings under revolving line of credit, net of repayments                        |  |                          | 1,850   |   |      |   | 4,900   |      |  |   | (12,475 | )
|Repayments of debt                                                                  |  |                          | (123    | ) |      |   | (1,279  | )    |  |   | (2,710  | )
|Proceeds from shares issued under employee stock purchase plan                      |  |                          | 473     |   |      |   | 364     |      |  |   | 263     |  
|Proceeds from issuance of common stock for exercise of stock options                |  |                          | 867     |   |      |   | 1,953   |      |  |   | 2,128   |  
|Tax benefit on exercise of stock options                                            |  |                          | 565     |   |      |   | -       |      |  |   | -       |  
|Tax benefit on disqualified dispositions                                            |  |                          | 14      |   |      |   | -       |      |  |   | -       |  
|Payment of debt issuance costs                                                      |  |                          | -       |   |      |   | (176    | )    |  |   | (19     | )
|                                                                                    |  |                          |         |   |      |   |         |      |  |   |         |  
|Net cash provided by (used for) financing activities                                |  |                          | 3,646   |   |      |   | 5,762   |      |  |   | (12,813 | )
|                                                                                    |  |                          |         |   |      |   |         |      |  |   |         |  
|                                                                                    |  |                          |        
|Increase (decrease) in cash and cash equivalents                                    |  |                          | 794     |   |      |   | (786    | )    |  |   | (517    | )
|Cash and cash equivalents at beginning of period                                    |  |                          | 592     |   |      |   | 1,378   |      |  |   | 1,895   |  
|                                                                                    |  |                          |         |   |      |   |         |      |  |   |         |  
|Cash and cash equivalents at end of period                                          |  | $                        | 1,386   |   |      | $ | 592     |      |  | $ | 1,378   |  
|                                                                                    |  |                          |         |   |      |   |         |      |  |   |         |  
|Supplemental disclosure of cash flow information                                    |  |                          |         |   |      |   |         |      |  |   |         |  
|Cash paid during the period for interest                                            |  | $                        | 1,737   |   |      | $ | 1,480   |      |  | $ | 1,558   |  
|                                                                                    |  |                          |         |   |      |   |         |      |  |   |         |  
|Cash paid during the period for income taxes, net                                   |  | $                        | 6,490   |   |      | $ | 4,461   |      |  | $ | 2,734   |  
|                                                                                    |  |                          |         |   |      |   |         |      |  |   |         |  
|Outstanding checks in excess of deposits in transit                                 |  | $                        | 2,694   |   |      | $ | 1,311   |      |  | $ | 2,948   |  
|                                                                                    |  |                          |         |   |      |   |         |      |  |   |         |  
|Non-cash investing activities:                                                      |  |                          |         |   |      |   |         |      |  |   |         |  
|Capital expenditures and intangible assets accrued for, not paid                    |  | $                        | 1,411   |   |      | $ | 265     |      |  | $ | 5,365   |  
|                                                                                    |  |                          |         |   |      |   |         |      |  |   |         |  

See accompanying notes to consolidated financial statements.



44



---

##### Table of Contents

AMERICAN DENTAL PARTNERS, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

For the Years Ended December 31, 2006, 2005 and 2004

(1) Description of Business

American Dental Partners, Inc. (the Company) is a leading provider of business services to
multidisciplinary dental group practices in selected markets throughout the United States. The Company customarily acquires selected assets of the dental practices with which it affiliates and enters into long-term service agreements with
professional corporations, professional associations or service corporations which are not owned by the Company. The Company is responsible for providing all services necessary for the administration of the non-clinical aspects of the dental
operations, while the affiliated dental practices are responsible for providing dental care to patients. Services provided to the affiliated practices include providing assistance with organizational planning and development; recruiting, retention
and training programs; quality assurance initiatives; facilities development and management; employee benefits administration; procurement; information systems; marketing and payor relations; and financial planning, reporting and analysis. The
Company operates in one segment.

(2) Summary of Significant Accounting Policies

Basis of Presentation and Principles of Consolidation

The accompanying consolidated financial statements have been
prepared in accordance with accounting principles generally accepted in the United States of America and include the accounts of American Dental Partners, Inc., its wholly-owned subsidiaries and its Arizonas Tooth Doctor for Kids (Tooth
Doctor) subsidiary which is owned 85% by the company (see Note 4: Acquisitions and Affiliations.) All material intercompany balances and transactions have been eliminated in consolidation. Management has determined that, based on the
provisions of its service agreements, the Company is not required to consolidate the financial statements of the affiliated practices, which are affiliated with the Company by means of a long-term service agreement, with its own, except for Tooth
Doctor.

Use of Estimates

The preparation of these
consolidated financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the
date of the consolidated financial statements and the reported amounts of revenue and expenses during the reporting period. The Companys carrying amount of accounts receivable, net, requires management to make estimates and assumptions
regarding the collectability of fees from affiliates that affect the consolidated financial statements. The Companys affiliation and acquisition transactions typically result in goodwill and other intangible assets, which affect the amount of
future period amortization expense and possible impairment expense that the Company will incur. The determination of the value of such intangible assets requires management to make estimates and assumptions that affect the consolidated financial
statements. The Company and the affiliated practices maintain insurance coverage for various business activities. Certain of the coverages have retentions which require the Company to make estimates and assumptions regarding losses below applicable
retention levels. There can be no assurance that actual results will not differ from those estimates.

Reclassifications

Amounts due from affiliated practices of $14,751,000 for 2005 are now reflected under accounts receivable, net. Accounts receivable, net, of $404,000 of the
Companys dental laboratory and dental benefits third party administrator (TPA) for 2005 have been reclassified from prepaid expenses and other current assets to accounts receivable, net, to conform to 2006 presentation.



45



---

##### Table of Contents

AMERICAN DENTAL PARTNERS, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS  (Continued)

For the Years
Ended December 31, 2006, 2005 and 2004

(2) Summary of Significant Accounting Policies  (Continued)



Cash and Cash Equivalents

The Company considers all highly liquid instruments with an original maturity of three months or less to be cash equivalents.

Fair Value of Financial Instruments

The Company believes the
carrying amount of cash and cash equivalents, accounts receivable, accounts payable and accrued expenses approximate fair value because of the short-term nature of these items. The carrying amount of long-term debt approximates fair value because
the interest rates are approximate rates at which similar types of borrowing arrangements could be obtained by the Company.

Net Revenue

The Companys net revenue represents primarily reimbursement of expenses and fees charged to affiliated practices pursuant to the terms of the service
agreements. Under certain service agreements, the Companys service fee consists of a monthly fee which is based upon a specified percentage of the amount by which the affiliated practices patient revenue exceeds expenses. Under a certain
service agreement, the Companys service fee consists of (i) a monthly fee for the first six months of the year equal to the prior year service fee and an additional performance fee based upon a percentage of the increase of the amount by
which the affiliated practices patient revenue exceeds expenses as compared to the prior year and (ii) a monthly fee for the second six months of the year which is based upon a specified percentage of the amount by which the affiliated
practices patient revenue exceeds expenses. Under certain service agreements, the Companys service fee consists entirely of a fixed monthly fee determined by agreement of the Company and the affiliated practice in a formal planning
process. Under a certain service agreement, the Companys service fee consists of a fixed monthly fee and an additional performance fee based upon a percentage of the amount by which the affiliated practices patient revenue exceeds
expenses as compared to the planned amount for the current year. In all instances, the service fee is negotiated as fair market value for services provided by the Company to the affiliated practices. Additionally, the Companys net revenue
includes amounts from patient revenue of Tooth Doctor, TPA fees and dental laboratory fees.

Inventories

Inventories consist primarily of dental supplies and are stated at the lower of cost or market, with cost being determined under the weighted average method.

Property and Equipment

Property and equipment are stated at
cost. Depreciation and amortization are recorded using the straight-line method over the estimated useful lives of the related assets which are 30-40 years for buildings, 3-12 years for equipment and 5-7 years for furniture and fixtures, and the
remaining life of the lease for leasehold improvements. Development costs incurred for computer software development or obtained for internal use are capitalized and amortized in accordance with Statement of Position No. 98-1,
Accounting for the Costs of Computer Software Developed for Internal Use.



46



---

##### Table of Contents

AMERICAN DENTAL PARTNERS, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS  (Continued)

For the Years
Ended December 31, 2006, 2005 and 2004



(2) Summary of Significant
Accounting Policies  (Continued)



Goodwill

Goodwill results from the excess of the purchase price of an acquisition over the estimated fair value of the tangible and intangible assets acquired and liabilities
assumed. Prior to 2004, management performed an impairment test on goodwill on an annual basis during the Companys first quarter or on an interim basis if an event or circumstance indicated that it is more likely than not that an impairment
loss had been incurred. During 2004, the Company changed the timing of the annual impairment test to the fourth quarter. The Company determines impairment by comparing the fair value to the carrying value of each reporting unit based on discounted
future cash flows using a discount rate reflecting the Companys average cost of funds. If impairment were determined, an appropriate adjustment to goodwill to reduce the assets carrying value would be made. The Company has not recorded
any impairment charges on goodwill as of December 31, 2006.

Service Agreements and Other Intangible Assets

The Companys affiliations with dental group practices by means of service agreements are not business combinations, and as such, do not result in recognition of
goodwill. The Company recognizes capitalized service agreement costs which are accounted for as definite-lived intangible assets acquired in other than a business combination, and recorded at fair value. In determining the fair value of a service
agreement recognized in connection with an affiliation, management estimates the timing, amount and value of future expected cash flows.

These service
agreements have contractual terms of 40 years but the asset is generally amortized on a straight-line basis over a period of 25 years. Customer relationship intangible assets associated with the acquisition of dental laboratories are amortized on a
straight-line basis over 15 years. In the event a service agreement is terminated, the related affiliated practice is required, at the Companys option in nearly all instances, to purchase the remaining unamortized balance of intangible assets
at the current book value, purchase other assets at the greater of fair value or book value, and assume leases and other liabilities related to the performance of the Companys obligations under the service agreement.

Management performs an impairment test on definite-lived intangible assets when facts and circumstances exist which would suggest that the intangible assets may be
impaired, by comparing the undiscounted net cash flows of the asset to its carrying value. If impairment were determined, an appropriate adjustment to the intangible asset would be made to reduce the assets carrying value to fair value. Fair
value is determined by calculating the projected discounted operating net cash flows of the asset using a discount rate reflecting the Companys average cost of funds. The Company has not recorded any impairment charges or write-downs on
definite-lived intangibles as of December 31, 2006.

Based on an evaluation of historical financial trends, the Company determined that the intangible
assets associated with certain in-market affiliations which were combined with existing affiliated practices were expected to generate future cash flows for a longer period than previously estimated and, accordingly, increased the amortization
period relating to these intangible assets. As a result, the amortization period for certain previously completed in-market affiliations were increased to 25 years in 2005. This change in estimate impacted 5% of the Companys intangible assets
and had the effect of reducing amortization expense by approximately $92,000 and $46,000, net of tax, in 2006 and 2005, respectively.



47



---

##### Table of Contents

AMERICAN DENTAL PARTNERS, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS  (Continued)

For the Years
Ended December 31, 2006, 2005 and 2004

(2) Summary of Significant Accounting Policies  (Continued)



Insurance

The Company maintains various insurance coverages for our business, including property-casualty, business interruption, workers compensation and general liability, among others. In addition, the affiliated practices
are required to maintain, or cause to be maintained, professional liability insurance with the Company as a named insured. Beginning in 2007, certain of the Companys insurances will be reinsured by a wholly-owned captive insurance company
licensed in the state of Vermont. Several of these insurance programs have retention levels in which the Company and its captive insurance company are financially obligated for insured losses below certain financial thresholds before the insurer is
financially obligated for insured losses. The Company and its captive insurance company maintain reserves for certain of these programs, which are based upon estimates provided by third-party actuaries or by individual case-basis valuations. Amounts
accrued for workers compensation insurance, including estimates for losses below retention levels, were $1,600,000 for 2006 and $1,300,000 for 2005. Changes in trends of loss severity or loss frequency may affect the calculation of these estimates
and create the need for subsequent adjustments to estimated loss reserves.

Income Taxes

Deferred income taxes are recognized for the tax consequences of temporary differences by applying enacted statutory tax rates applicable to future years to differences
between the consolidated financial statement carrying amounts and the tax basis of existing assets and liabilities. The effect on deferred taxes of changes in the tax rate is recognized in operations in the period that includes the enactment date.

Stock Option Plans

On January 1, 2006, the
Company adopted Statement of Financial Accounting Standards (SFAS) No. 123(R), Share Based Payments, which revises SFAS 123, Accounting for Stock-Based Compensation. Prior to January 1,
2006, SFAS No. 123, as amended by SFAS No. 148 Accounting for Stock-Based Compensation-Transition and Disclosure-an amendment to FASB Statement No. 123, allowed companies to recognize expense for the fair value of
stock-based awards or to continue to apply the provisions of Accounting Principles Board (APB) Opinion No. 25, Accounting for Stock Issued to Employees, and disclose the effects of SFAS No. 123 as if the
fair-value-based method defined in SFAS No. 123 had been applied. Under APB Opinion No. 25, compensation expense is recognized if on the measurement date the fair value of the underlying stock exceeds the exercise price. The Company had
elected to apply the provisions of APB Opinion No. 25 and provide the pro forma disclosure provisions of SFAS No. 123 and No. 148. Because the Company granted stock options to employees at exercise prices equal to the fair market
value on the date of grant, no stock-based compensation was recognized in periods prior to January 1, 2006.



48



---

##### Table of Contents

AMERICAN DENTAL PARTNERS, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS  (Continued)

For the Years
Ended December 31, 2006, 2005 and 2004

(2) Summary of Significant Accounting Policies  (Continued)



The following table illustrates the effect on net income and earnings per share as if the
Company had applied the fair value recognition provisions of SFAS No. 123, as amended by SFAS No. 148, Accounting for Stock-Based Compensation  Transition and Disclosurefor the year ended December 31 (in
thousands, except per share amounts):



|                                                                                                                             |  |      |        |   |      |   |       |  
|---------------------------------------------------------------------------------------------------------------------------- |  | ---- | ------ | - | ---- | - | ----- | -
|                                                                                                                             |  | 2005 |        |   | 2004 |  
|Net earnings, as reported                                                                                                    |  | $    | 10,291 |   |      | $ | 8,519 |  
|Deduct: Total stock-based compensation expense determined under fair value method for all awards, net of related tax effects |  |      | (847   | ) |      |   | (896  | )
|                                                                                                                             |  |      |        |   |      |   |       |  
|Net earnings, proforma                                                                                                       |  | $    | 9,444  |   |      | $ | 7,623 |  
|                                                                                                                             |  |      |        |   |      |   |       |  
|Earnings per share:                                                                                                          |  |      |        |   |      |   |       |  
|Basic, as reported                                                                                                           |  | $    | 0.86   |   |      | $ | 0.75  |  
|                                                                                                                             |  |      |        |   |      |   |       |  
|Basic, pro forma                                                                                                             |  | $    | 0.79   |   |      | $ | 0.67  |  
|                                                                                                                             |  |      |        |   |      |   |       |  
|Diluted, as reported                                                                                                         |  | $    | 0.81   |   |      | $ | 0.70  |  
|                                                                                                                             |  |      |        |   |      |   |       |  
|Diluted, pro forma                                                                                                           |  | $    | 0.74   |   |      | $ | 0.63  |  
|                                                                                                                             |  |      |        |   |      |   |       |  

See Note 11, Stock-based Compensation for further detail on the Companys stock-based
compensation and stock option plans.

Earnings per Share

Earnings per share are computed based on SFAS No. 128 Earnings per Share. SFAS No. 128 requires presentation of basic earnings per share (Basic EPS) and diluted earnings per share (Diluted
EPS) by all entities that have publicly traded common stock or potential common stock (options, warrants, convertible securities or contingent stock arrangements). Basic EPS is computed by dividing income available to common stockholders by
the weighted average number of common shares outstanding during the period. Diluted EPS gives effect to all dilutive potential common shares outstanding during the period. The computation of Diluted EPS does not assume conversion, exercise or
contingent exercise of securities that would have an antidilutive effect on earnings.

Recent Accounting Pronouncements

In July 2006, the Financial Accounting Standards Board (FASB) issued FASB Interpretation No. 48, Accounting for Uncertainty in Income
Taxes  an interpretation of FASB Statement No. 109 (FIN 48), which clarifies the accounting and disclosure for uncertainty in tax positions, as defined. FIN 48 seeks to reduce the diversity in practice
associated with certain aspects of the recognition and measurement related to accounting for income taxes. This interpretation is effective for fiscal years beginning after December 15, 2006. The Company does not expect the interpretation will
have a material impact on its results from operations or financial position.

In September 2006, the FASB issued statement No. 157, Fair Value
Measurements,(SFAS 157). SFAS 157 defines fair value, establishes a framework for measuring fair value in accordance with accounting principles generally accepted in the United States, and expands disclosures
about fair value measurements. SFAS 157 is effective for fiscal years beginning after November 15, 2007, with earlier application encouraged. Any amounts



49



---

##### Table of Contents

AMERICAN DENTAL PARTNERS, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS  (Continued)

For the Years
Ended December 31, 2006, 2005 and 2004

(2) Summary of Significant Accounting Policies  (Continued)



recognized upon adoption as a cumulative effect adjustment will be recorded to the opening balance of retained earnings in the year of adoption. The Company
has not yet determined the impact of this Statement on its financial condition and results of operations.

(3) Accounts Receivable, net and Net Revenue

Accounts receivable, net

Accounts receivable,
net, reflects receivables due from affiliated dental practices that represent amounts due pursuant to the terms of the service agreements, and other receivables, which are trade receivables, net of any allowances for doubtful accounts, for the
Companys affiliated dental practice, dental lab and TPA. The following table lists receivables due from affiliated practices and other receivables for the years ended December 31 (in thousands):



|                                          |  |              |        |      |   |       
|----------------------------------------- |  | ------------ | ------ | ---- | - | ------
|                                          |  | December 31,
|                                          |  | 2006         |        | 2005
|Receivables due from affiliated practices |  | $            | 14,000 |      | $ | 14,751
|Other receivables, net                    |  |              | 2,373  |      |   | 404   
|                                          |  |              |        |      |   |       
|Accounts receivable, net                  |  | $            | 16,373 |      | $ | 15,155
|                                          |  |              |        |      |   |       

Net revenue

For the years ended December 31, 2006, 2005 and 2004, net revenue consisted of the following (in thousands):



|                                                                  |  |      |         |      |   |         |  |   |        
|----------------------------------------------------------------- |  | ---- | ------- | ---- | - | ------- |  | - | -------
|                                                                  |  | 2006 |         | 2005 |   | 2004   
|Reimbursement of expenses:                                        |  |      |         |      |   |         |  |   |        
|Salaries and benefits                                             |  | $    | 76,154  |      | $ | 68,800  |  | $ | 63,020 
|Lab and dental supplies                                           |  |      | 37,250  |      |   | 33,791  |  |   | 30,340 
|Office occupancy expenses                                         |  |      | 24,371  |      |   | 21,282  |  |   | 19,326 
|Other operating expenses                                          |  |      | 15,485  |      |   | 14,705  |  |   | 13,044 
|Depreciation expense                                              |  |      | 6,672   |      |   | 6,021   |  |   | 5,016  
|                                                                  |  |      |         |      |   |         |  |   |        
|Total reimbursement of expenses                                   |  |      | 159,932 |      |   | 144,599 |  |   | 130,746
|Business service fees                                             |  |      | 51,945  |      |   | 47,380  |  |   | 42,714 
|                                                                  |  |      |         |      |   |         |  |   |        
|Revenue earned under service agreements                           |  |      | 211,877 |      |   | 191,979 |  |   | 173,460
|Patient revenue, professional services and dental laboratory fees |  |      | 6,040   |      |   | 4,949   |  |   | 5,094  
|                                                                  |  |      |         |      |   |         |  |   |        
|Net revenue                                                       |  | $    | 217,917 |      | $ | 196,928 |  | $ | 178,554
|                                                                  |  |      |         |      |   |         |  |   |        

Net revenue derived from the Companys service agreement with PDG, P.A., the affiliated practice at Park
Dental, represented approximately 29%, 31%, and 32% of the Companys consolidated net revenue for 2006, 2005 and 2004, respectively. Net revenue from the Companys service agreement with Wisconsin Dental Group, S.C., the affiliated
practice at Forward Dental, represented approximately 13% of the Companys consolidated net revenue for each of the years 2006, 2005 and 2004. No other service agreement or customers accounted for greater than 10% of the Companys
consolidated net revenue.



50



---

##### Table of Contents

AMERICAN DENTAL PARTNERS, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS  (Continued)

For the Years
Ended December 31, 2006, 2005 and 2004



(4) Acquisitions and Affiliations

During the year ended December 31, 2006, the Company completed thirteen acquisition and affiliation transactions. The Company acquired selected assets of eleven dental practices, ten that joined existing
affiliated practices and one platform affiliation in Wisconsin, which included execution of a new service agreement between the Company and the affiliated practice. In another transaction, the Company developed de novo dental facilities in
Minnesota, rather than acquiring selected clinical assets, and executed a service agreement between the Company and the affiliated practice. Finally, the Company acquired the assets of Arizonas Tooth Doctor for Kids (Tooth Doctor),
the assets of Tooth Doctor being contributed to a newly created subsidiary which is owned 85% by the Company, which became a new platform affiliation in Arizona. The Company did not execute a new service agreement as Tooth Doctor employs dentists.
Please see detailed discussion of acquisition of Tooth Doctor in the last section of this footnote. All transactions completed in 2006 are referred to as 2006 Transactions. The aggregate purchase price paid in connection with these
transactions consisted of approximately $25,750,000 in cash and a $50,000 deferred payment that was accrued at the transaction date and will be paid in the first quarter of 2007. Excluding Tooth Doctor, contingent payments associated with five 2006
Transactions are based on revenue, for an agreed upon period after the transaction, meeting or exceeding a predetermined threshold, and in total cannot exceed $255,000. The Company records contingent payments in the period they are resolved.

During the year ended December 31, 2005, the Company completed ten acquisition and affiliation transactions. The Company acquired selected assets of
ten dental practices, nine that joined existing affiliated practices and one platform affiliation in Missouri, which included execution of a new service agreement between the Company and the affiliated practice. All transactions completed in 2005
are referred to as 2005 Transactions. The aggregate purchase price paid in connection with these transactions consisted of approximately $15,941,000 in cash. Contingent payments of $1,292,000 associated with two 2005 Transactions were
resolved and accrued for on December 31, 2006. They will be paid in the first quarter of 2007. Contingent payments associated with three 2005 Transactions are based on revenue, for an agreed upon period after the transaction, meeting or
exceeding a predetermined threshold, and in total cannot exceed $340,000.



51



---

##### Table of Contents

AMERICAN DENTAL PARTNERS, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS  (Continued)

For the Years
Ended December 31, 2006, 2005 and 2004

(4) Acquisitions and Affiliations  (Continued)



The 2006 and 2005 Transactions are as follows:



|               |  |                                   |  |                         
|-------------- |  | --------------------------------- |  | ------------------------
|Date           |  | Affilated Practice                |  | Location(s)             
|December 2006  |  | Arizonas Tooth Doctor for Kids   |  | Phoenix/Globe, AZ       
|December 2006  |  | Gregory A. Wadleigh, D.D.S., M.S. |  | Sun Prarie/Middleton, WI
|October 2006   |  | John E. Moser, D.D.S.             |  | Brookfield, WI          
|July 2006      |  | Dental-Net, Inc.                  |  | Tucson/Glendale, AZ     
|June 2006      |  | Gary R. Ricketts, D.D.S.          |  | Houston, TX             
|June 2006      |  | Fred J. Leydecker, D.D.S.         |  | Blasdell, NY            
|June 2006      |  | Michael E. Grady, D.D.S.          |  | Milwaukee, WI           
|June 2006      |  | Associated Dental Care            |  | Albertville/Blaine, MN  
|May 2006       |  | J. Mark LaVoy, D.D.S.             |  | Glendale, AZ            
|April 2006     |  | Deerwood Orthodontics             |  | Franklin, WI            
|March 2006     |  | Complete Dental Care              |  | Madison Heights, MI     
|February 2006  |  | Kenneth E. Miller, D.D.S.         |  | Oklahoma City, OK       
|January 2006   |  | Michael A. Talluto, D.D.S.        |  | Seneca, NY              
|December 2005  |  | Mark M.Ortinau, D.D.S.            |  | Ellisville, MO          
|October 2005   |  | Harold S. Marks, D.D.S.           |  | Eldersburg, MD          
|September 2005 |  | Kerry J. Neal, D.D.S.             |  | Austin, TX              
|September 2005 |  | Newburgh Heights Dental           |  | Plymouth, MI            
|August 2005    |  | Desert Dental Specialty           |  | Palm Desert, CA         
|July 2005      |  | Dental Associates of Rochester    |  | Rochester, NY           
|April 2005     |  | Karen L. Robinette, D.D.S.        |  | Oklahoma City, OK       
|April 2005     |  | Thomas G. Hartnett, D.D.S.        |  | Hamburg, NY             
|February 2005  |  | Premier Dental Partners           |  | St. Louis, MO           
|January 2005   |  | James D. Hera, D.D.S.             |  | Minneapolis, MN         

The accompanying consolidated financial statements include the results of operations under the service agreements
from the date of affiliation. The following tables show total consideration paid, the estimated fair value of net assets acquired and intangible assets associated with 2006 and 2005 Transactions, excluding Tooth Doctor (in thousands):



|                                                                   |  |      |       |      |   |       
|------------------------------------------------------------------ |  | ---- | ----- | ---- | - | ------
|                                                                   |  | 2006 |       | 2005
|Total consideration paid                                           |  | $    | 7,056 |      | $ | 16,741
|Fair value of net tangible assets acquired and liabilities assumed |  |      | 530   |      |   | 3,139 
|                                                                   |  |      |       |      |   |       
|Intangible assets                                                  |  | $    | 6,526 |      | $ | 13,602
|                                                                   |  |      |       |      |   |       

The Company affiliated with Desert Dental Specialty in 2005. In connection with the Desert Dental Specialty
transaction, the asset purchase agreement between the Company and Desert Dental Specialty included a future contingent payment based on a multiple of earnings before interest and taxes in excess of a predetermined threshold for the year ending
December 31, 2006, less capital expenditures incurred from the date of affiliation. The amount of the contingent payment was $1,192,000 which was accrued as of December 31, 2006 in accrued expenses and will be paid in the first quarter of
2007.

The Company affiliated with 1stAdvantage Dental Management, L.L.C. (1stAdvantage) in 2002. In connection with the 1stAdvantage transaction, the asset
purchase agreement between the Company and 1stAdvantage



52



---

##### Table of Contents

AMERICAN DENTAL PARTNERS, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS  (Continued)

For the Years
Ended December 31, 2006, 2005 and 2004

(4) Acquisitions and Affiliations  (Continued)



included a future contingent payment based on a multiple of earnings before interest and taxes in excess of a predetermined threshold for the year ending
December 31, 2004, less capital expenditures incurred from the date of affiliation. The amount of the contingent payment was $4,790,000 which was accrued as of December 31, 2004 and was paid in 2005.

On December 1, 2006, the Company completed its acquisition of the assets of Tooth Doctor. The assets were contributed to a newly created subsidiary that is 85%
owned by the Company. The results of Tooth Doctors operations have been included in the consolidated financial statements since that date. Tooth Doctor is a dental group practice with six locations in metropolitan Phoenix and Globe, Arizona.
Tooth Doctor provides the Company with expertise and entrance in a rapidly growing area of dentistry, providing dental care to children who have historically had limited access to dental care. The aggregate purchase price was $18,700,000 in cash. No
common shares or debt were issued in connection with the acquisition. The following table summarizes the estimated fair value of the assets acquired and liabilities assumed at the date of the acquisition (in thousands):



|                              |  |                  |        |  
|----------------------------- |  | ---------------- | ------ | -
|                              |  | December 1, 2006 |       
|Current assets                |  | $                | 2,106  |  
|Property, plant and equipment |  |                  | 975    |  
|Intangible assets             |  |                  | 1,275  |  
|Goodwill                      |  |                  | 17,996 |  
|                              |  |                  |        |  
|Total assets acquired         |  |                  | 22,352 |  
|                              |  |                  |        |  
|Current liabilities           |  |                  | (3,652 | )
|                              |  |                  |        |  
|Total liabilities assumed     |  |                  | (3,652 | )
|                              |  |                  |        |  
|Net assets acquired           |  | $                | 18,700 |  
|                              |  |                  |        |  

The acquired intangible asset of $1,275,000 was classified as a trade name intangible, is not subject to
amortization and is expected to be deductible for tax purposes. Goodwill of $17,996,000 is expected to be deductible for tax purposes. The Company is in the process of obtaining third-party valuations of certain intangible assets, and therefore, the
allocation of the purchase is subject to adjustment.

In addition, the acquisition agreement between the Company and former owners of Tooth Doctor includes
a future contingent payment based on a multiple of earnings before interest and taxes in excess of a predetermined threshold for the year ending December 31, 2007, less capital expenditures incurred from the date of the acquisition, to be paid
in the first quarter of 2008. After the fifth anniversary of the transaction, the Company will have the option to purchase the 15% minority interest and the minority owners will have the option to sell their ownership in Tooth Doctor to the Company
at a value based on a multiple of Earnings before Interest, Taxes, Depreciation and Amortization (EBITDA), subject to certain adjustments.

The following
unaudited pro forma financial information presents results as if the Tooth Doctor acquisition had occurred at the beginning of the respective periods:



|                           |  |              |         |      |   |        
|-------------------------- |  | ------------ | ------- | ---- | - | -------
|                           |  | December 31,
|                           |  | 2006         |         | 2005
|Net revenue                |  | $            | 236,000 |      | $ | 215,961
|Net income                 |  |              | 12,054  |      |   | 11,252 
|Earnings per share-basic   |  |              | 0.98    |      |   | 0.94   
|Earnings per share-diluted |  |              | 0.93    |      |   | 0.88   



53



---

##### Table of Contents

AMERICAN DENTAL PARTNERS, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS  (Continued)

For the Years
Ended December 31, 2006, 2005 and 2004

(4) Acquisitions and Affiliations  (Continued)



These pro forma results have been prepared for comparative purposes only and include certain
adjustments such as additional amortization expense as a result of identifiable intangible assets arising from the acquisition and from increased interest expense on acquisition debt. The pro forma results are not necessarily indicative either of
the results of operations that actually would have resulted had the acquisition been in effect at the beginning of the respective periods or of future results.

(5) Property and Equipment

Property and equipment consisted of the following at December 31 (in thousands):



|                                  |  |      |         |   |      |   |         |  
|--------------------------------- |  | ---- | ------- | - | ---- | - | ------- | -
|                                  |  | 2006 |         |   | 2005 |  
|Land and buildings                |  | $    | 767     |   |      | $ | 761     |  
|Equipment                         |  |      | 47,899  |   |      |   | 41,621  |  
|Furniture and fixtures            |  |      | 9,743   |   |      |   | 8,549   |  
|Leasehold improvements            |  |      | 37,742  |   |      |   | 36,787  |  
|                                  |  |      |         |   |      |   |         |  
|Total property and equipment      |  |      | 96,151  |   |      |   | 87,718  |  
|Less accumulated depreciation     |  |      | (49,691 | ) |      |   | (42,534 | )
|                                  |  |      |         |   |      |   |         |  
|Total property and equipment, net |  | $    | 46,460  |   |      | $ | 45,184  |  
|                                  |  |      |         |   |      |   |         |  

Since 2002,the Company has been developing Improvis, a proprietary practice management system intended to
replace Comdent, the system currently used by many of the affiliated practices. Improvis has been designed to include expanded clinical, managerial, and financial capabilities. As of December 31, 2006, seven affiliated practices, comprising 40
dental facilities, were using Improvis. The Company has recorded aggregate capitalized software costs amounting to $1,693,000, which includes approximately $101,000 in capitalized interest, in connection with this project as of December 31,
2006, of which $898,000 relates to the first development phase. The Company began to amortize costs associated with the first development phase in October 2005 and has recognized approximately $112,000 in amortization costs as of December 31,
2006. These costs will be amortized over ten years.

The Company is obligated under non-cancelable operating leases for premises and equipment expiring in
various years through the year 2025. Rent expense for the years ended December 31, 2006, 2005 and 2004 amounted to $19,560,000, $17,580,000, and $16,130,000, respectively, of which $18,055,000, $16,399,000 and $14,924,000 were reimbursed under
service agreements.



54



---

##### Table of Contents

AMERICAN DENTAL PARTNERS, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS  (Continued)

For the Years
Ended December 31, 2006, 2005 and 2004

(5) Property and Equipment  (Continued)



Minimum future rental payments under non-cancelable operating leases and amounts to be
reimbursed under service agreements as of December 31, 2006 are as follows (in thousands):



|                             |  |                 |        |                                                       |   |            |  |   |      
|---------------------------- |  | --------------- | ------ | ----------------------------------------------------- | - | ---------- |  | - | -----
|                             |  | Total AmountDue |        | AmountsSubject toReimbursementUnder ServiceAgreements |   | Net Amount
|2007                         |  | $               | 15,367 |                                                       | $ | 14,017     |  | $ | 1,350
|2008                         |  |                 | 13,716 |                                                       |   | 12,546     |  |   | 1,170
|2009                         |  |                 | 11,660 |                                                       |   | 10,721     |  |   | 939  
|2010                         |  |                 | 9,852  |                                                       |   | 8,922      |  |   | 930  
|2011                         |  |                 | 7,708  |                                                       |   | 6,878      |  |   | 830  
|Thereafter                   |  |                 | 27,014 |                                                       |   | 23,911     |  |   | 3,103
|                             |  |                 |        |                                                       |   |            |  |   |      
|Total minimum lease payments |  | $               | 85,317 |                                                       | $ | 76,995     |  | $ | 8,322
|                             |  |                 |        |                                                       |   |            |  |   |      

(6) Intangible Assets

Intangible assets consisted of the following as of December 31, 2006 and 2005 (in thousands):



|                       |  |                     |         |                         |   |         |     |  |   |        
|---------------------- |  | ------------------- | ------- | ----------------------- | - | ------- | --- |  | - | -------
|                       |  | GrossCarryingAmount |         | AccumulatedAmortization |   |         | Net
|December 31, 2006      |  |                     |         |                         |   |         |     |  |   |        
|Service agreements     |  | $                   | 135,782 |                         | $ | (36,086 | )   |  | $ | 99,696 
|Trade name             |  |                     | 1,275   |                         |   | -       |     |  |   | 1,275  
|Customer relationships |  |                     | 205     |                         |   | (63     | )   |  |   | 142    
|                       |  |                     |         |                         |   |         |     |  |   |        
|                       |  | $                   | 137,262 |                         | $ | (36,149 | )   |  | $ | 101,113
|                       |  |                     |         |                         |   |         |     |  |   |        
|December 31, 2005      |  |                     |         |                         |   |         |     |  |   |        
|Service agreements     |  | $                   | 127,846 |                         | $ | (30,741 | )   |  | $ | 97,105 
|Customer relationships |  |                     | 205     |                         |   | (50     | )   |  |   | 155    
|                       |  |                     |         |                         |   |         |     |  |   |        
|                       |  | $                   | 128,051 |                         | $ | (30,791 | )   |  | $ | 97,260 
|                       |  |                     |         |                         |   |         |     |  |   |        

Intangible asset amortization expense for 2006, 2005 and 2004 was $5,358,000, $5,007,000, and $4,408,000,
respectively. Annual amortization expense for each of the next five fiscal years will be approximately $5,500,000. The weighted average amortization period for service agreements and customer relationships is 25 years. Based on an evaluation of
historical financial trends, the Company determined that the intangible assets associated with certain in-market affiliations which were combined with existing affiliated practices were expected to generate future cash flows for a longer period than
previously estimated and, accordingly, in 2005 the Company increased the amortization period relating to these intangible assets. As a result, the amortization period for certain previously completed in-market affiliations were increased to 25
years. This change in estimate impacted 5% of the Companys intangible assets at that time and had the effect of reducing amortization expense by approximately $92,000 and $46,000, net of tax, in 2006 and 2005, respectively.



55



---

##### Table of Contents

AMERICAN DENTAL PARTNERS, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS  (Continued)

For the Years
Ended December 31, 2006, 2005 and 2004



(7) Income Taxes

Income tax expense for the years ended December 31 consists of the following (in thousands):



|                   |  |      |       |   |      |   |       |      |  |   |      
|------------------ |  | ---- | ----- | - | ---- | - | ----- | ---- |  | - | -----
|                   |  | 2006 |       |   | 2005 |   |       | 2004
|Current:           |  |      |       |   |      |   |       |      |  |   |      
|Federal            |  | $    | 6,854 |   |      | $ | 6,222 |      |  | $ | 2,950
|State              |  |      | 754   |   |      |   | 754   |      |  |   | 778  
|                   |  |      |       |   |      |   |       |      |  |   |      
|Total current      |  |      | 7,608 |   |      |   | 6,976 |      |  |   | 3,728
|                   |  |      |      
|Deferred:          |  |      |       |   |      |   |       |      |  |   |      
|Federal            |  |      | (634  | ) |      |   | (552  | )    |  |   | 1,792
|State              |  |      | 172   |   |      |   | 170   |      |  |   | 71   
|                   |  |      |       |   |      |   |       |      |  |   |      
|Total deferred     |  |      | (462  | ) |      |   | (382  | )    |  |   | 1,863
|                   |  |      |       |   |      |   |       |      |  |   |      
|Total income taxes |  | $    | 7,146 |   |      | $ | 6,594 |      |  | $ | 5,591
|                   |  |      |       |   |      |   |       |      |  |   |      

The tax effects of temporary differences that give rise to significant portions of deferred tax assets and
deferred tax liabilities as of December 31 are as follows (in thousands):



|                                       |  |      |         |   |      |   |         |  
|-------------------------------------- |  | ---- | ------- | - | ---- | - | ------- | -
|                                       |  | 2006 |         |   | 2005 |  
|Deferred tax assets:                   |  |      |         |   |      |   |         |  
|Operating loss and other carryforwards |  | $    | 594     |   |      | $ | 529     |  
|Organization and start-up costs        |  |      | 23      |   |      |   | 29      |  
|Accrued expenses and other liabilities |  |      | 2,583   |   |      |   | 1,743   |  
|Other                                  |  |      | 9       |   |      |   | -       |  
|                                       |  |      |         |   |      |   |         |  
|Gross deferred tax assets              |  |      | 3,209   |   |      |   | 2,301   |  
|Net valuation allowance                |  |      | (483    | ) |      |   | (315    | )
|                                       |  |      |         |   |      |   |         |  
|Net deferred tax assets                |  | $    | 2,726   |   |      | $ | 1,986   |  
|                                       |  |      |         |   |      |   |         |  
|Deferred tax liabilities:              |  |      |         |   |      |   |         |  
|Intangibles                            |  | $    | (14,951 | ) |      | $ | (14,292 | )
|Property and equipment                 |  |      | (996    | ) |      |   | (1,547  | )
|Software costs                         |  |      | (719    | ) |      |   | (589    | )
|                                       |  |      |         |   |      |   |         |  
|Total deferred tax liabilities         |  |      | (16,666 | ) |      |   | (16,428 | )
|                                       |  |      |         |   |      |   |         |  
|Net deferred tax liabilities           |  | $    | (13,940 | ) |      | $ | (14,442 | )
|                                       |  |      |         |   |      |   |         |  

The Company has a valuation allowance against a portion of its deferred tax assets related to its state tax
attributes. Based upon the Companys current structure, it is more likely than not that this deferred tax asset will not be realized. The valuation allowance for deferred tax assets was $483,000 and $315,000 as of December 31, 2006 and
2005, respectively. The change in the valuation allowance for the years ended December 31, 2006 and 2005 was $168,000 and $269,000 respectively. The initial recognition (that is, by elimination of the valuation allowance) of the state tax
benefits in the future will be primarily recorded to additional paid-in capital, not consolidated statements of income.

Tax benefits associated with tax
deductions for stock option exercises were credited to additional paid-in capital in the amounts of $579,000 and $2,079,000 for the years ended December 31, 2006 and 2005, respectively.



56



---

##### Table of Contents

AMERICAN DENTAL PARTNERS, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS  (Continued)

For the Years
Ended December 31, 2006, 2005 and 2004

(7) Income Taxes  (Continued)



The net deferred tax assets and liabilities consisted of the following at December 31 (in thousands):



|                               |  |         |         |   |       |   |        |       |  |   |         |   |  |       |         |   |       |   |        |   |  |   |         |  
|------------------------------ |  | ------- | ------- | - | ----- | - | ------ | ----- |  | - | ------- | - |  | ----- | ------- | - | ----- | - | ------ | - |  | - | ------- | -
|                               |  | 2006    |         |   | 2005  |  
|                               |  | Federal |         |   | State |   |        | Total |  |   | Federal |   |  | State |         |   | Total |  
|Deferred tax assets:           |  |         |         |   |       |   |        |       |  |   |         |   |  |       |         |   |       |   |        |   |  |   |         |  
|Current                        |  | $       | 1,655   |   |       | $ | 280    |       |  | $ | 1,935   |   |  | $     | 1,303   |   |       | $ | 440    |   |  | $ | 1,743   |  
|Non-current                    |  |         | 233     |   |       |   | 558    |       |  |   | 791     |   |  |       | (95     | ) |       |   | 338    |   |  |   | 243     |  
|                               |  |         |         |   |       |   |        |       |  |   |         |   |  |       |         |   |       |   |        |   |  |   |         |  
|Total deferred tax assets      |  |         | 1,888   |   |       |   | 838    |       |  |   | 2,726   |   |  |       | 1,208   |   |       |   | 778    |   |  |   | 1,986   |  
|                               |  |         |         |   |       |  
|Deferred tax liabilities:      |  |         |         |   |       |   |        |       |  |   |         |   |  |       |         |   |       |   |        |   |  |   |         |  
|Current                        |  |         | -       |   |       |   | -      |       |  |   | -       |   |  |       | -       |   |       |   | -      |   |  |   | -       |  
|Non-current                    |  |         | (13,243 | ) |       |   | (3,423 | )     |  |   | (16,666 | ) |  |       | (13,175 | ) |       |   | (3,253 | ) |  |   | (16,428 | )
|                               |  |         |         |   |       |   |        |       |  |   |         |   |  |       |         |   |       |   |        |   |  |   |         |  
|Total deferred tax liabilities |  |         | (13,243 | ) |       |   | (3,423 | )     |  |   | (16,666 | ) |  |       | (13,175 | ) |       |   | (3,253 | ) |  |   | (16,428 | )
|                               |  |         |         |   |       |   |        |       |  |   |         |   |  |       |         |   |       |   |        |   |  |   |         |  
|Net deferred tax liabilities   |  | $       | (11,355 | ) |       | $ | (2,585 | )     |  | $ | (13,940 | ) |  | $     | (11,967 | ) |       | $ | (2,475 | ) |  | $ | (14,442 | )
|                               |  |         |         |   |       |   |        |       |  |   |         |   |  |       |         |   |       |   |        |   |  |   |         |  

The Company has state net operating loss carryforwards of $11,923,000 as of December 31, 2006 which expire at
various times from 2007 through 2025.

The following table reconciles the Federal statutory income tax rate to the Companys effective income tax rate
for the years ended December 31:



|                                                         |  |      |   |  |      |   |  |      |  
|-------------------------------------------------------- |  | ---- | - |  | ---- | - |  | ---- | -
|                                                         |  | 2006 |   |  | 2005 |   |  | 2004 |  
|Income taxes at Federal statutory rate                   |  | 35.0 | % |  | 35.0 | % |  | 35.0 | %
|Differential due to graduated rate                       |  | 0.0  |   |  | (0.2 | ) |  | (0.7 | )
|State taxes, net of Federal benefit                      |  | 3.3  |   |  | 3.6  |   |  | 6.4  |  
|SFAS No. 123(R) expense for employee stock purchase plan |  | 0.4  |   |  | 0.0  |   |  | 0.0  |  
|Other permanent differences                              |  | 0.4  |   |  | 0.7  |   |  | (1.1 | )
|                                                         |  |      |   |  |      |   |  |      |  
|Effective income tax rate                                |  | 39.1 | % |  | 39.1 | % |  | 39.6 | %
|                                                         |  |      |   |  |      |   |  |      |  

In the Companys opinion, adequate tax liabilities have been established for all years. Federal tax years
prior to 2003 are closed.

(8) Debt

Long-term debt
obligations consist of the following at December 31 (in thousands):



|                                                                                                                                                                             |  |      |        |      |   |       
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |  | ---- | ------ | ---- | - | ------
|                                                                                                                                                                             |  | 2006 |        | 2005
|Revolving line of credit advances, collateralized by substantially all assets of the Company, LIBOR-based and prime interest rates ranging
from approximately 6.35% to 8.25% |  | $    | 33,700 |      | $ | 31,850
|Subordinated notes payable to stockholders and former owners, bearing interest at 7%, maturing through 2010                                                                  |  |      | 188    |      |   | 312   
|                                                                                                                                                                             |  |      |        |      |   |       
|Total long-term debt                                                                                                                                                         |  |      | 33,888 |      |   | 32,162
|Less current maturities                                                                                                                                                      |  |      | 81     |      |   | 123   
|                                                                                                                                                                             |  |      |        |      |   |       
|Long-term debt, non-current portion                                                                                                                                          |  | $    | 33,807 |      | $ | 32,039
|                                                                                                                                                                             |  |      |        |      |   |       



57



---

##### Table of Contents

AMERICAN DENTAL PARTNERS, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS  (Continued)

For the Years
Ended December 31, 2006, 2005 and 2004

(8) Debt  (Continued)



Annual maturities of long-term debt as of December 31, 2006 are as follows (in thousands):



|               |  |               |       
|-------------- |  | ------------- | ------
|               |  | Long-termDebt
|2007           |  | $             | 81    
|2008 (1)       |  |               | 33,736
|2009           |  |               | 36    
|2010           |  |               | 35    
|2011           |  |               | -     
|Thereafter     |  |               | -     
|               |  |               |       
|Total payments |  | $             | 33,888
|               |  |               |       

(1) On February 21, 2007, the Company amended its facility extending its maturity date to
February 2012.

Revolving Line of Credit

The Company
has a $70,000,000 revolving credit facility that is used for general corporate purposes, including working capital, acquisitions and affiliations and capital expenditures. The facility had an original maturity date of February 2008 and maximum
borrowings under the line were scheduled to decrease to $65,000,000 in February 2007. The outstanding balance under this line as of December 31, 2006 was $33,700,000, and the Company had a stand-by letter of credit amounting to $650,000 at
December 31, 2006. The unused balance under this line as of December 31, 2006 was $36,300,000 and based on borrowing covenants, reduced by the stand-by letter of credit, $35,462,000 was available for borrowing. On February 21, 2007,
the Company amended its credit facility and extended the maturity to February 2012. Amendments to the original facility included an increase in the facility capacity to $75,000,000, a decrease in the interest margin and a decrease in the
Companys commitment fees. Borrowings under the amended credit facility bear interest at either prime or LIBOR plus a margin, at the Companys option. The margin is based upon the Companys debt coverage ratio and ranges from 0.0% to
0.875% for prime borrowings and 0.875% to 1.875% for LIBOR borrowings. At December 31, 2006, the LIBOR interest rate under the credit facility, including borrowing margin, was approximately 6.35% and the prime interest rate under the credit
facility was 8.25%. In addition, the Company pays a commitment fee on the unused balance of the credit facility ranging from 0.20% to 0.50%. Borrowings are limited to an availability formula based on earnings before income taxes, depreciation and
amortization, adjusted for certain items, and is collateralized by a first lien on substantially all of the Companys assets, including a pledge of the stock of its subsidiaries. The Company is also required to comply with financial and other
covenants, including minimum net worth, leverage and fixed charge coverage ratios and maximum capital expenditures as defined by the credit agreement. The Company was in compliance with its covenants as of December 31, 2006.

(9) Related Party Transactions

The Company affiliated with 1stAdvantage Dental Management, L.L.C.
(1stAdvantage) in 2002. In connection with the 1stAdvantage transaction, the Company entered into a subordinated note agreement with the owners of 1stAdvantage, including an individual who became an executive officer of the Company. During 2004, the executive officers portion of subordinated note
payments made by the Company to 1stAdvantage was $61,000. In addition, the asset purchase agreement between the
Company and 1stAdvantage included a future contingent payment based on a multiple of earnings before interest and
taxes in excess of a predetermined threshold for the



58



---

##### Table of Contents

AMERICAN DENTAL PARTNERS, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS  (Continued)

For the Years
Ended December 31, 2006, 2005 and 2004

(9) Related Party Transactions  (Continued)



year ending December 31, 2004, less capital expenditures incurred from the date of affiliation. The amount of the contingent payment was $4,790,000
which was accrued as of December 31, 2004 and paid in 2005. Of the total contingent payment, the executive officer received approximately $714,000. The subordinated note and service agreement are on substantially the same terms and conditions
as all of the Companys other subordinated notes and service agreements.

(10) Stockholders Equity

Stock Dividend

On September 8, 2005, the Board of Directors
approved a three-for-two split of the Companys common stock, effected in the form of a 50% stock dividend payable October 14, 2005 to stockholders of record as of September 20, 2005. The Company issued 4,017,067 shares of common
stock in connection with this transaction and recorded a charge to additional paid in capital equal to the par value of shares issued. The accompanying consolidated financial statements and earnings per share data have been restated to reflect this
stock split for all periods presented.

Preferred Stock

The Company is authorized to issue up to 1,000,000 shares of Preferred Stock, $0.01 par value.

Preferred Stock may be issued in one or more
series as determined by the Board of Directors without further stockholder approval, and the Board of Directors is authorized to fix and determine the terms, limitations and relative rights and preferences of such Preferred Stock, and to fix and
determine the variations among series of Preferred Stock. Any new Preferred Stock issued would have priority over the Common Stock with respect to dividends and other distributions, including the distribution of assets upon liquidation and
dissolution. Such Preferred Stock may be subject to repurchase or redemption by the Company. The Board of Directors, without stockholder approval, could issue Preferred Stock with voting and conversion rights that could adversely affect the voting
power of the holders of Common Stock and the issuance of which could be used by the Board of Directors in defense of a hostile takeover of the Company. As of December 31, 2006 and 2005, there were no shares of Preferred Stock issued or
outstanding.

Common Stock

The Company is authorized
to issue up to 25,000,000 shares of Common Stock, $0.01 par value. As of December 31, 2006, 12,991,137 shares were issued and 12,408,637 shares were outstanding. As of December 31, 2005, 12,840,004 shares were issued and 12,257,504 shares
were outstanding.

Treasury Stock

On
December 16, 1999, the Board of Directors authorized the Company to repurchase up to $5,000,000 of its Common Stock in the open market. Under this plan, the Company has repurchased 582,500 shares of its Common Stock through December 31,
2006 at a cost of $3,874,000. The Companys 2005 stock dividend was not paid on the repurchased shares of Common Stock.



59



---

##### Table of Contents

AMERICAN DENTAL PARTNERS, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS  (Continued)

For the Years
Ended December 31, 2006, 2005 and 2004

(10) Stockholders Equity  (Continued)



Cash Dividends

The Company has the ability to pay cash dividends on its Common Stock but has not done so to date. The terms of the Companys credit facility allow the Company to pay dividends without the lenders consent
up to certain maximums and compliance with certain covenants.

(11) Stock-based Compensation

Options granted under the following plans generally have a ten-year term and generally have a vesting period of four years. At December 31, 2006, options for
1,294,261 shares were vested and 617,000 shares were available for future grants under the 2005 Equity Incentive Plan and the 2005 Directors Stock Option Plan. The Company issues new shares upon stock option exercises. No restricted shares have been
awarded.

On January 1, 2006, the Company adopted Statement of Financial Accounting Standards (SFAS) No. 123(R), Share Based
Payments, which revises SFAS 123, Accounting for Stock-Based Compensation. Prior to January 1, 2006, SFAS No. 123, as amended by SFAS No. 148 Accounting for Stock-Based Compensation-Transition and
Disclosure-an amendment to FASB Statement No. 123, allowed companies to recognize expense for the fair value of stock-based awards or to continue to apply the provisions of Accounting Principles Board (APB) Opinion
No. 25, Accounting for Stock Issued to Employees, and disclose the effects of SFAS No. 123 as if the fair-value-based method defined in SFAS No. 123 had been applied. Under APB Opinion No. 25, compensation
expense is recognized if on the measurement date the fair value of the underlying stock exceeds the exercise price. The Company had elected to apply the provisions of APB Opinion No. 25 and provide the pro forma disclosure provisions of SFAS
No. 123 and No. 148. Because the Company granted stock options to employees and directors at exercise prices equal to the fair market value on the date of grant, no stock-based compensation was recognized in periods prior to
January 1, 2006.

Under SFAS No. 123(R), the Company is required to select a valuation technique or option-pricing model that meets the criteria
as stated by the standard, which includes a binomial model and the Black-Scholes model. At the present time, the Company is using the Black-Scholes model. The adoption of SFAS No. 123(R), applying the modified prospective method, as
elected by the Company, requires the Company to estimate forfeitures in calculating the expense related to stock-based compensation as opposed to only recognizing those forfeitures and the corresponding reduction in expense as they occur. The
Company has chosen to use the short-cut method to determine the pool of windfall tax benefits as of the adoption of SFAS No. 123(R). In addition, SFAS No. 123(R) requires the Company to reflect tax savings resulting from the
tax deductions in excess of expense as a financing cash flow in its statement of cash flows rather than as an operating cash flow as reflected prior to the adoption of SFAS No. 123(R).

The Company recognized stock-based compensation expense for options granted and its employee stock purchase plan (ESPP) of $1,363,000 during the year ended
December 31, 2006, and this expense was recorded within general corporate expense on the Companys consolidated statements of income. In addition, the Company recorded a deferred tax benefit associated with stock-based compensation for
options grants of $447,745 for the year ended December 31, 2006, and no amounts were capitalized. The remaining unrecognized stock-based compensation expense for unvested stock option awards as of December 31, 2006 was approximately
$3,200,000, and the weighted average period of time over which this cost will be recognized is 3.0 years.



60



---

##### Table of Contents

AMERICAN DENTAL PARTNERS, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS  (Continued)

For the Years
Ended December 31, 2006, 2005 and 2004

(11) Stock-based Compensation  (Continued)



The fair value for these options and employee stock purchase rights granted was estimated at
the date of grant using the Black-Scholes option pricing model with the following weighted average assumptions for the years ended December 31:



|                                                                                |  |              |      |   |      |   |      |              |  |   |      |   |  |              |      |   |      |   |      |   |  |   |      |  
|------------------------------------------------------------------------------- |  | ------------ | ---- | - | ---- | - | ---- | ------------ |  | - | ---- | - |  | ------------ | ---- | - | ---- | - | ---- | - |  | - | ---- | -
|                                                                                |  | 2006         |      |   | 2005 |   |      | 2004         | 
|                                                                                |  | StockOptions |      |   | ESPP |   |      | StockOptions |  |   | ESPP |   |  | StockOptions |      |   | ESPP |  
|Risk-free interest rate                                                         |  |              | 4.6  | % |      |   | 4.9  | %            |  |   | 3.7  | % |  |              | 4.0  | % |      |   | 2.6  | % |  |   | 1.6  | %
|Expected dividend yield                                                         |  |              | 0.0  | % |      |   | 0.0  | %            |  |   | 0.0  | % |  |              | 0.0  | % |      |   | 0.0  | % |  |   | 0.0  | %
|Expected volatility                                                             |  |              | 42   | % |      |   | 41   | %            |  |   | 36   | % |  |              | 35   | % |      |   | 61   | % |  |   | 43   | %
|Expected life (years)                                                           |  |              | 6.25 |   |      |   | 0.5  |              |  |   | 4.0  |   |  |              | 0.5  |   |      |   | 4.0  |   |  |   | 0.5  |  
|Weighted average fair value of options/ purchase rights granted during the year |  | $            | 6.91 |   |      | $ | 4.59 |              |  | $ | 5.29 |   |  | $            | 3.40 |   |      | $ | 6.45 |   |  | $ | 3.34 |  

The Company calculated the volatility assumption using a blend of a historical volatility rate for a period equal
to the expected term and an expected volatility rate based on more recent activity. The Company estimated the expected life of its stock options using the simplified method for determining the expected term as prescribed by the Securities and
Exchange Commissions Staff Accounting Bulletin No. 107, Share-based Payment.Expected life of the Companys ESPP purchase rights reflects the length of each period (six months) an employee can participate in at the
end of which shares are purchased.

The following table summarizes the stock option transactions during the year ended December 31, 2006:



|                                 |  |                      |   |  |                               |       |                                                    |      |                                        |   |       
|-------------------------------- |  | -------------------- | - |  | ----------------------------- | ----- | -------------------------------------------------- | ---- | -------------------------------------- | - | ------
|                                 |  | Shares (inthousands) |   |  | Weighted-AverageExercisePrice |       | Weighted-AverageRemainingContractualTerm (inyears) |      | AggregateIntrinsic Value(in thousands)
|Outstanding at December 31, 2005 |  | 1,782                |   |  | $                             | 7.65  |                                                    | -    |                                        |   | -     
|Granted                          |  | 285                  |   |  |                               | 14.18 |                                                    | -    |                                        |   | -     
|Exercised                        |  | (116                 | ) |  |                               | 7.51  |                                                    | -    |                                        |   | -     
|Forfeited or expired             |  | (8                   | ) |  |                               | 11.09 |                                                    | -    |                                        |   | -     
|                                 |  |                      |   |  |                               |       |                                                    |      |                                        |   |       
|Outstanding at December 31, 2006 |  | 1,943                |   |  | $                             | 8.60  |                                                    | 6.59 |                                        | $ | 19,994
|                                 |  |                      |   |  |                               |       |                                                    |      |                                        |   |       
|Exercisable at December 31, 2006 |  | 1,294                |   |  | $                             | 6.53  |                                                    | 5.76 |                                        | $ | 16,001
|                                 |  |                      |   |  |                               |       |                                                    |      |                                        |   |       

Cash proceeds, tax benefits and intrinsic value related to total stock options exercised during the year ended
December 31 2006, 2005 and 2004 are provided in the following table (in thousands):



|                                               |  |      |       |      |   |       |  |   |      
|---------------------------------------------- |  | ---- | ----- | ---- | - | ----- |  | - | -----
|                                               |  | 2006 |       | 2005 |   | 2004 
|Proceeds from stock options exercised          |  | $    | 867   |      | $ | 1,953 |  | $ | 2,128
|Tax benefit related to stock options exercised |  | $    | 565   |      | $ | 2,079 |  | $ | 2,406
|Intrinsic value of stock options exercised     |  | $    | 1,205 |      | $ | 5,525 |  | $ | 6,539



61



---

##### Table of Contents

AMERICAN DENTAL PARTNERS, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS  (Continued)

For the Years
Ended December 31, 2006, 2005 and 2004

(11) Stock-based Compensation  (Continued)



Summaries of the Companys stock option plans as of December 31, 2006 are as
follows:

2005 Equity Incentive Plan

The
Companys 2005 Equity Incentive Plan, (the 2005 Plan), provides for the grant of stock options to key employees. The 2005 Plan permits the grant of options that qualify as incentive stock options and non-qualified options. The
exercise price of such options can be no less than the fair market value of the Common Stock at the time of grant. Options granted pursuant to the 2005 Plan generally vest over four years and expire ten years after the date of grant. At
December 31, 2006, 675,000 shares were authorized under the 2005 Plan, with 675,000 shares reserved for issuance and options for 233,000 shares outstanding. As part of the approval of the 2005 Plan, no further stock options will be granted by
the Company under the Amended and Restated 1996 Stock Option Plan and the 1999 Restricted Stock Plan has been terminated.

2005 Directors Stock Option
Plan

The Companys 2005 Directors Stock Option Plan, (the 2005 Directors Plan), provides for the granting of options to non-employee
directors. Only non-qualified options may be granted pursuant to the Directors Plan. The exercise price of such options can be no less than the fair market value of the Common Stock at the time of grant. Options granted pursuant to the 2005
Directors Plan generally vest over four years and expire ten years after the date of grant. At December 31, 2006, 225,000 shares were authorized under the Directors Plan, with 225,000 shares reserved for issuance and options for 50,000 shares
outstanding. As part of the approval of the 2005 Directors Plan, no further stock options will be granted under the Companys Amended and Restated 1996 Directors Stock Option Plan.

1996 Stock Option Plan

The Companys 1996 Stock Option Plan, as amended (the 1996 Plan), provides
for the grant of stock options to key employees. The 1996 Plan permits the granting of options that qualify as incentive stock options and non-qualified options. The exercise price of such options is no less than the fair market value of the Common
Stock at the time of grant. Options granted pursuant to the 1996 Plan generally vest over four years and expire ten years after the date of grant. At December 31, 2006, 2,359,869 shares were authorized under the 1996 Plan, with 1,345,440 shares
reserved for issuance and options for 1,345,440 shares outstanding. No further options will be granted under the 1996 Plan.

1996 Time Accelerated
Restricted Stock Option Plan

The Companys 1996 Time Accelerated Restricted Stock Option Plan, as amended (TARSOP Plan), provides for
the grant of stock options to key employees. Only non-qualified options may be granted pursuant to the TARSOP Plan. The exercise price of such options is no less than the fair market value of the Common Stock at the time of grant. Options granted
under this plan vest at the end of the nine years, subject to accelerated vesting based on achievement of certain performance measures, and generally expire after nine and a half years. In February 2003, the Companys Board of Directors
approved an amendment to prohibit future grants under the TARSOP Plan, except for options for 14,054 shares that were granted in July 2003 in connection with the Companys one-time stock option exchange program. At December 31, 2006,
options for 14,054 shares were outstanding under this Plan. All outstanding options to purchase such shares became exercisable at the completion of the IPO except for the options granted in July 2003 in connection with the Companys one-time
stock option exchange program. The TARSOP Plan expired on January 11, 2006.



62



---

##### Table of Contents

AMERICAN DENTAL PARTNERS, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS  (Continued)

For the Years
Ended December 31, 2006, 2005 and 2004

(11) Stock-based Compensation  (Continued)



1996 Affiliate Stock Option Plan

The Companys 1996 Affiliate Stock Option Plan, as amended (the Affiliate Plan), provides for the grant of stock options to certain persons associated
with the affiliated practices. Only non-qualified options may be granted pursuant to the Affiliate Plan. The exercise price of such options is no less than the fair market value of the Common Stock at the time of grant. Options granted pursuant to
the Affiliate Plan generally vest over four years and expire ten years after the date of grant. In February 2003, the Companys Board of Directors approved an amendment to prohibit future grants under the Affiliate Plan. At December 31,
2006, options for 33,660 shares were outstanding under the Affiliate Plan.

1996 Directors Stock Option Plan

The Companys 1996 Directors Stock Option Plan, as amended (the 1996 Directors Plan), provides for the granting of options to outside directors. Only
non-qualified options may be granted pursuant to the 1996 Directors Plan. The exercise price of such options is no less than the fair market value of the Common Stock at the time of grant. Options granted pursuant to the Directors Plan generally
vest over four years and expire ten years after the date of grant. At December 31, 2006, 577,500 shares were authorized under the 1996 Directors Plan, with 266,550 shares reserved for issuance and options for 266,550 shares outstanding. No
further options will be granted under the 1996 Directors Plan.

1997 Employee Stock Purchase Plan

The 1997 Employee Stock Purchase Plan, as amended (the Employee Stock Purchase Plan or ESPP), enables eligible employees to purchase shares of
Common Stock at a discount on a periodic basis through payroll deductions and is intended to meet the requirements of Section 423 of the Internal Revenue Code. Purchases occur at the end of option periods, each of six months duration. The
purchase price of Common Stock under the ESPP is 85% of the lesser of the value of the Common Stock at the beginning or the end of the option period. Prior to each option period, participants may elect to have from 2% to 10% of their compensation
withheld and applied to the purchase of shares at the end of the option period. The ESPP imposes a maximum of $12,500 on the amount that may be withheld from any participant in any option period. A total of 400,000 shares of Common Stock has been
reserved for issuance under the ESPP, of which 349,832 shares have been issued through 2006 and 20,403 shares were committed for issuance as of December 31, 2006.



63



---

##### Table of Contents

AMERICAN DENTAL PARTNERS, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS  (Continued)

For the Years
Ended December 31, 2006, 2005 and 2004

(11) Stock-based Compensation  (Continued)



Stock Option Activity

A summary of stock option activity under all the Companys stock option plans for the years ended December 31, 2006, 2005 and 2004 follows:



|                                 |  |           |   |      |                              |       |         |           |   |                              |   |         |  |           |                              |  |   |     
|-------------------------------- |  | --------- | - | ---- | ---------------------------- | ----- | ------- | --------- | - | ---------------------------- | - | ------- |  | --------- | ---------------------------- |  | - | ----
|                                 |  | 2006      |   | 2005 |                              | 2004 
|                                 |  | Options   |   |      | WeightedAverageExercisePrice |       | Options |           |   | WeightedAverageExercisePrice |   | Options |  |           | WeightedAverageExercisePrice
|Outstanding at beginning of year |  | 1,781,531 |   |      | $                            | 7.65  |         | 1,957,051 |   |                              | $ | 6.15    |  | 2,522,533 |                              |  | $ | 4.89
|Granted                          |  | 284,800   |   |      |                              | 14.17 |         | 240,150   |   |                              |   | 15.75   |  | 246,900   |                              |  |   | 8.90
|Exercised                        |  | (115,804  | ) |      |                              | 7.51  |         | (399,922  | ) |                              |   | 5.07    |  | (753,270  | )                            |  |   | 2.82
|Cancelled                        |  | (7,823    | ) |      |                              | 11.09 |         | (15,748   | ) |                              |   | 10.17   |  | (59,112   | )                            |  |   | 6.23
|                                 |  |           |   |      |                              |       |         |           |   |                              |   |         |  |           |                              |  |   |     
|Outstanding at end of year       |  | 1,942,704 |   |      | $                            | 8.60  |         | 1,781,531 |   |                              | $ | 7.65    |  | 1,957,051 |                              |  | $ | 6.15
|                                 |  |           |   |      |                              |       |         |           |   |                              |   |         |  |           |                              |  |   |     
|Exercisable at end of year       |  | 1,294,261 |   |      | $                            | 6.53  |         | 1,150,597 |   |                              | $ | 6.10    |  | 1,108,008 |                              |  | $ | 5.67
|                                 |  |           |   |      |                              |       |         |           |   |                              |   |         |  |           |                              |  |   |     

The following table summarizes information about stock options outstanding at December 31, 2006:



|                         |  |                     |  |                                                    |  |                               |       |                   |           |                               |   |      
|------------------------ |  | ------------------- |  | -------------------------------------------------- |  | ----------------------------- | ----- | ----------------- | --------- | ----------------------------- | - | -----
|                         |  | Options Outstanding |  | Options Exercisable                               
|Range of Exercise Prices |  | NumberOutstanding   |  | WeightedAverageRemainingContractualLife (in years) |  | WeightedAverageExercise Price |       | NumberExercisable |           | WeightedAverageExercise Price
|$ 4.41 - $ 5.23          |  | 333,286             |  | 4.35                                               |  | $                             | 4.93  |                   | 333,286   |                               | $ | 4.93 
|$ 5.25 - $ 5.98          |  | 113,146             |  | 4.74                                               |  |                               | 5.44  |                   | 104,532   |                               |   | 5.41 
|$ 5.99 - $ 5.99          |  | 386,261             |  | 6.50                                               |  |                               | 5.99  |                   | 365,712   |                               |   | 5.99 
|$ 6.00 - $ 6.04          |  | 55,350              |  | 6.07                                               |  |                               | 6.02  |                   | 54,263    |                               |   | 6.02 
|$ 6.67 - $ 6.67          |  | 300,000             |  | 6.76                                               |  |                               | 6.67  |                   | 249,750   |                               |   | 6.67 
|$ 8.67 - $ 8.67          |  | 3,750               |  | 1.16                                               |  |                               | 8.67  |                   | 3,750     |                               |   | 8.67 
|$ 8.90 - $ 8.90          |  | 199,238             |  | 7.10                                               |  |                               | 8.90  |                   | 89,446    |                               |   | 8.90 
|$ 9.45 - $ 9.45          |  | 39,060              |  | 0.58                                               |  |                               | 9.45  |                   | 39,060    |                               |   | 9.45 
|$ 13.80 - $ 13.80        |  | 261,000             |  | 9.14                                               |  |                               | 13.80 |                   | -         |                               |   | -    
|$ 15.70 - $ 19.45        |  | 251,613             |  | 8.30                                               |  |                               | 16.00 |                   | 54,462    |                               |   | 15.75
|                         |  |                     |  |                                                    |  |                               |       |                   |           |                               |   |      
|                         |  | 1,942,704           |  | 6.59                                               |  | $                             | 8.60  |                   | 1,294,261 |                               | $ | 6.53 
|                         |  |                     |  |                                                    |  |                               |       |                   |           |                               |   |      

(12) Employee Retirement Benefit Plans

The Company has a Savings and Retirement Plan (401(k) Plan), adopted October 1, 1996, which is the Companys principal defined contribution retirement plan. The plan provides for a match of up to 50% of
the first 6% of an employees eligible compensation, subject to IRS max/minimums. Total plan expense for the years ended December 31, 2006, 2005 and 2004 was $1,184,000, $1,002,000 and $995,000, respectively.



64



---

##### Table of Contents

AMERICAN DENTAL PARTNERS, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS  (Continued)

For the Years
Ended December 31, 2006, 2005 and 2004



(13) Earnings Per Share

The following table provides a reconciliation of the numerators and denominators of the basic and diluted earnings per share computations for the years ended December 31 (in thousands, except per share amounts):



|                                              |  |      |        |      |   |        |  |   |       
|--------------------------------------------- |  | ---- | ------ | ---- | - | ------ |  | - | ------
|                                              |  | 2006 |        | 2005 |   | 2004  
|Basic Earnings Per Share:                     |  |      |        |      |   |        |  |   |       
|Net earnings available to common stockholders |  | $    | 11,134 |      | $ | 10,291 |  | $ | 8,519 
|                                              |  |      |        |      |   |        |  |   |       
|Weighted average common shares outstanding    |  |      | 12,301 |      |   | 12,006 |  |   | 11,372
|                                              |  |      |        |      |   |        |  |   |       
|Net earnings per share                        |  | $    | 0.91   |      | $ | 0.86   |  | $ | 0.75  
|                                              |  |      |        |      |   |        |  |   |       
|Diluted Earnings Per Share:                   |  |      |        |      |   |        |  |   |       
|Net earnings available to common stockholders |  |      | 11,134 |      | $ | 10,291 |  | $ | 8,519 
|                                              |  |      |        |      |   |        |  |   |       
|Weighted average common shares outstanding    |  |      | 12,301 |      |   | 12,006 |  |   | 11,372
|Add: Dilutive effect of options(1)            |  |      | 615    |      |   | 710    |  |   | 730   
|                                              |  |      |        |      |   |        |  |   |       
|Weighted average common shares as adjusted    |  |      | 12,916 |      |   | 12,716 |  |   | 12,102
|                                              |  |      |        |      |   |        |  |   |       
|Net earnings per share                        |  | $    | 0.86   |      | $ | 0.81   |  | $ | 0.70  
|                                              |  |      |        |      |   |        |  |   |       

(1)In 2006, 461,865 options were
excluded from the computation of diluted earnings per share due to their antidilutive effect.



65



---

##### Table of Contents

AMERICAN DENTAL PARTNERS, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS  (Continued)

For the Years
Ended December 31, 2006, 2005 and 2004



(14) Selected Quarterly Operating Results (unaudited)

The following table sets forth summary quarterly results of operations for the Company for the years ended December 31, 2006 and 2005 (in thousands, except per
share amounts):



|                                            |  |              |        |               |   |              |  |               |        |  |   |       
|------------------------------------------- |  | ------------ | ------ | ------------- | - | ------------ |  | ------------- | ------ |  | - | ------
|                                            |  | FirstQuarter |        | SecondQuarter |   | ThirdQuarter |  | FourthQuarter
|2006                                        |  |              |        |               |   |              |  |               |        |  |   |       
|Net revenue                                 |  | $            | 54,066 |               | $ | 55,078       |  | $             | 53,842 |  | $ | 54,931
|Operating expenses                          |  |              | 48,978 |               |   | 49,355       |  |               | 49,401 |  |   | 50,001
|Earnings from operations                    |  |              | 5,088  |               |   | 5,723        |  |               | 4,441  |  |   | 4,930 
|Earnings before income taxes                |  |              | 4,604  |               |   | 5,253        |  |               | 3,992  |  |   | 4,431 
|Income taxes                                |  |              | 1,813  |               |   | 2,070        |  |               | 1,578  |  |   | 1,685 
|Net earnings                                |  | $            | 2,791  |               | $ | 3,183        |  | $             | 2,414  |  | $ | 2,746 
|Net earnings per share (1):                 |  |              |        |               |   |              |  |               |        |  |   |       
|Basic                                       |  | $            | 0.23   |               | $ | 0.26         |  | $             | 0.20   |  | $ | 0.22  
|Diluted                                     |  | $            | 0.22   |               | $ | 0.25         |  | $             | 0.19   |  | $ | 0.21  
|Weighted average common shares outstanding: |  |              |        |               |   |              |  |               |        |  |   |       
|Basic                                       |  |              | 12,269 |               |   | 12,280       |  |               | 12,308 |  |   | 12,345
|Diluted                                     |  |              | 12,851 |               |   | 12,848       |  |               | 12,934 |  |   | 13,022
|                                            |  |              |        |              
|2005                                        |  |              |        |               |   |              |  |               |        |  |   |       
|Net revenue                                 |  | $            | 48,145 |               | $ | 49,427       |  | $             | 49,573 |  | $ | 49,783
|Operating expenses                          |  |              | 43,560 |               |   | 44,147       |  |               | 45,471 |  |   | 45,061
|Earnings from operations                    |  |              | 4,585  |               |   | 5,280        |  |               | 4,102  |  |   | 4,722 
|Earnings before income taxes                |  |              | 4,155  |               |   | 4,888        |  |               | 3,625  |  |   | 4,217 
|Income taxes                                |  |              | 1,646  |               |   | 1,934        |  |               | 1,437  |  |   | 1,577 
|Net earnings                                |  | $            | 2,509  |               | $ | 2,954        |  | $             | 2,188  |  | $ | 2,640 
|Net earnings per share (1):                 |  |              |        |               |   |              |  |               |        |  |   |       
|Basic                                       |  | $            | 0.21   |               | $ | 0.25         |  | $             | 0.18   |  | $ | 0.22  
|Diluted                                     |  | $            | 0.20   |               | $ | 0.23         |  | $             | 0.17   |  | $ | 0.21  
|Weighted average common shares outstanding: |  |              |        |               |   |              |  |               |        |  |   |       
|Basic                                       |  |              | 11,870 |               |   | 11,960       |  |               | 12,021 |  |   | 12,181
|Diluted                                     |  |              | 12,534 |               |   | 12,635       |  |               | 12,784 |  |   | 12,876



|(1) | The sum of the quarterly earnings per share may not equal the full-year earnings per share as the computations of the weighted average shares outstanding for each quarter and the
full year are made independently.
|--- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

(15) Subsequent Events

On January 1, 2007, the Company completed an affiliation with a general dentistry practice which joined the existing affiliated practice in Maryland. The Company acquired certain non-clinical assets and the
dental practice became subject to the existing service agreement at Greater Maryland Dental Partners. The dental practice is a two location practice serving the greater Maryland market.

On February 1, 2007, the Company completed an affiliation with a pediatric dentistry practice which joined the existing affiliated practice in Texas. The Company acquired certain non-clinical assets and the
dental practice



66



---

##### Table of Contents

AMERICAN DENTAL PARTNERS, INC.

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS  (Continued)

For the Years
Ended December 31, 2006, 2005 and 2004

(15) Subsequent Events  (Continued)



became subject to the existing service agreement at Longhorn Dental Associates. The dental practice is a two location practice serving the greater Austin,
Texas market.

On February 21, 2007, the Company amended its credit facility and extended the maturity to February 2012. Amendments to the original
facility included an increase in the facility capacity to $75,000,000, a decrease in the interest margin and a decrease in the Companys commitment fees. Borrowings under the amended credit facility bear interest at either prime or LIBOR plus a
margin, at the Companys option. The margin is based upon the Companys debt coverage ratio and ranges from 0.0% to 0.875% for prime borrowings and 0.875% to 1.875% for LIBOR borrowings. Borrowings are limited to an availability formula
based on earnings before income taxes, depreciation and amortization, adjusted for certain items, and is collateralized by a first lien on substantially all of the Companys assets, including a pledge of the stock of its subsidiaries. The
Company is also required to comply with financial and other covenants, including minimum net worth, leverage and fixed charge coverage ratios and maximum capital expenditures as defined by the credit agreement.



67



---

##### Table of Contents

ITEM 9.  CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND FINANCIAL DISCLOSURE

Not applicable.

ITEM 9A.  CONTROLS AND PROCEDURES

Disclosure Controls and Procedures

An evaluation was performed under the supervision and with the participation of the Companys management, including the Chief Executive Officer and Chief Financial
Officer, of the effectiveness of the Companys disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) of the Securities Exchange Act of 1934) as of December 31, 2006. Based on that evaluation, the Chief Executive
Officer and Chief Financial Officer have concluded that the Companys disclosure controls and procedures timely alert them to material information relating to the Company required to be included in this report and were effective as of
December 31, 2006.

Managements Report on Internal Control over Financial Reporting and Report of Independent Registered Public Accounting
Firm

The information required to be furnished pursuant to this item is set forth under the captions Managements Report on Internal Control
over Financial Reporting and Report of Independent Registered Public Accounting Firm included at Item 8. Financial Statements and Supplementary Data.

Changes in Internal Control over Financial Reporting

As required by Rule 13a-15(d) under the Exchange Act, the
Companys management, including the Companys Chief Executive Officer and Chief Financial Officer, has evaluated the Companys internal control over financial reporting to determine whether any changes occurred during the fourth
fiscal quarter covered by this annual report that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting. Based on that evaluation, there has been no such change during the fourth
fiscal quarter covered by this annual report.

ITEM 9B.  OTHER INFORMATION

None.



68



---

##### Table of Contents

PART III

ITEM 10.  DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE OF THE REGISTRANT

Information relating to the
executive officers of the Company is included under the caption Executive Officers and Senior Management of the Registrant in Part I of this Report.

The information set forth under the captions Elections of Directors, Section 16(a) Beneficial Ownership Reporting Compliance and Corporate Governance in the Companys Proxy Statement to be filed with
the Commission in connection with the 2007 Annual Meeting of Stockholders (the Proxy Statement) is incorporated herein by reference.

ITEM 11.  EXECUTIVE COMPENSATION

The information set forth under the caption Executive
Compensation in the Companys Proxy Statement is incorporated herein by reference.

ITEM 12.  SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT AND RELATED STOCKHOLDER MATTERS

A
summary of our stockholder approved and non-approved equity plans as of December 31, 2006 (in thousands, except per share amounts):



|                                                                             |  |                                                                                         |  |                                                                |      |                                                                                                                                       |    
|---------------------------------------------------------------------------- |  | --------------------------------------------------------------------------------------- |  | -------------------------------------------------------------- | ---- | ------------------------------------------------------------------------------------------------------------------------------------- | ---
|                                                                             |  | (a)                                                                                     |  | (b)                                                            |      | (c)                                                                                                                                  
|                                                                             |  | Number of securitiesto be issued uponexercise ofoutstanding options,warrants and
rights |  | Weighted-averageexercise price ofoutstanding optionsand rights |      | Number of securitiesremaining available forfuture issuance underequity compensationplans
(excludingsecurities reflected incolumn (a))
|Equity compensation plans approved by security shareholders (excluding ESPP) |  | 1,943                                                                                   |  | $                                                              | 8.60 |                                                                                                                                       | 617
|                                                                             |  |                                                                                         | 
|Equity compensation plans approved by security shareholders (ESPP only)      |  | N/A                                                                                     |  |                                                                | N/A  |                                                                                                                                       | 30 
|                                                                             |  |                                                                                         |  |                                                                |      |                                                                                                                                       |    
|Total all plans                                                              |  | 1,943                                                                                   |  | $                                                              | 8.60 |                                                                                                                                       | 647
|                                                                             |  |                                                                                         |  |                                                                |      |                                                                                                                                       |    

The information set forth under the caption Principal Stockholders in the Proxy Statement is
incorporated herein by reference.

ITEM 13.  CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS, AND DIRECTOR INDEPENDENCE

The information set forth
under the caption Certain Relationships and Related Transactions and the information set forth under the caption Election of Directors - Compensation Committee Interlocks in the Companys Proxy Statement are incorporated
herein by reference.

ITEM 14. PRINCIPAL ACCOUNTING FEES AND SERVICES

Information set forth under the caption Proposal 3 
Ratification of Independent Public Accountant  Independent Accountant Fees and Audit Committee Report in the Companys Proxy Statement is incorporated herein by reference.



69



---

##### Table of Contents

PART IV

ITEM 15.  EXHIBITS AND FINANCIAL STATEMENT SCHEDULES

The following documents are filed as part of this report:



|(a)(1) | Consolidated Financial Statements(See Item 8)
|------ | ---------------------------------------------



|(a)(2) | Financial Statement Schedules
|------ | -----------------------------

| | All schedules are omitted as the required information is not applicable or is included in the consolidated financial statements or related notes.
| | -------------------------------------------------------------------------------------------------------------------------------------------------



|(a)(3) | Exhibits
|------ | --------

| | The exhibits which are filed with this Form 10-K or which are incorporated herein by reference are set forth in the Exhibit Index which appears in this report beginning at page 72.
| | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



70



---

##### Table of Contents

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the Registrant
has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized, in the Town of Wakefield, Commonwealth of Massachusetts, on the 9thday of March, 2007.



AMERICAN DENTAL PARTNERS, INC.By:

/S/ GREGORY A. SERRAOGregory A. Serrao Chairman, President and Chief Executive Officer


Pursuant to the requirement of the Securities Act of 1934, this report has been signed below by the
following persons on behalf of the Registrant and in the capacities and on the dates indicated.



|                                              |  |                                                                                                |  |              
|--------------------------------------------- |  | ---------------------------------------------------------------------------------------------- |  | -------------
|Signature                                     |  | Capacity In Which Signed                                                                       |  | Date         
|                                              |  |                                                                                               
|/S/ GREGORY A. SERRAO Gregory A. Serrao       |  | Chairman, President and Chief Executive Officer and Director(principal executive officer)      |  | March 9, 2007
|                                              |  |                                                                                               
|/S/ BREHT T. FEIGH Breht T. Feigh             |  | Executive Vice President  Chief Financial Officer and Treasurer (principal financial officer) |  | March 9, 2007
|                                              |  |                                                                                               
|/S/ MARK W. VARGO Mark W. Vargo               |  | Vice President  Chief Accounting Officer (principal accounting officer)                       |  | March 9, 2007
|                                              |  |                                                                                               
|/S/ DR. ROBERT E. HUNTER Dr. Robert E. Hunter |  | Director                                                                                       |  | March 9, 2007
|                                              |  |                                                                                               
|/S/ JAMES T. KELLY James T. Kelly             |  | Director                                                                                       |  | March 9, 2007
|                                              |  |                                                                                               
|/S/ MARTIN J. MANNION Martin J. Mannion       |  | Director                                                                                       |  | March 9, 2007
|                                              |  |                                                                                               
|/S/ GERARD M. MOUFFLET Gerard M. Moufflet     |  | Director                                                                                       |  | March 9, 2007
|                                              |  |                                                                                               
|/S/ DERRIL W. REEVES Derril W. Reeves         |  | Director                                                                                       |  | March 9, 2007



71



---

##### Table of Contents

EXHIBIT INDEX



|              |  |                                                                                                                                                      
|------------- |  | -----------------------------------------------------------------------------------------------------------------------------------------------------
|ExhibitNumber |  | Exhibit Description                                                                                                                                  
|              | 
|3(a)          |  | Second Amended and Restated Certificate of Incorporation of American Dental Partners, Inc. (1)                                                       
|              | 
|3(b)          |  | Amended and Restated By-laws of American Dental Partners, Inc. (2)                                                                                   
|              | 
|4(a)          |  | Form of Stock Certificate (1)                                                                                                                        
|              | 
|10(b)         |  | American Dental Partners, Inc. Amended and Restated 1996 Stock Option Plan, as amended by Amendments No. 1, No. 2, No. 3 and No. 4 (4)               
|              | 
|10(d)         |  | Amendment No. 5 to American Dental Partners, Inc. Amended and Restated 1996 Stock Option Plan (5)                                                    
|              | 
|10(e)         |  | Amendment No. 6 to American Dental Partners, Inc. Amended and Restated 1996 Stock Option Plan (6)                                                    
|              | 
|10(f)         |  | American Dental Partners, Inc. 1996 Time Accelerated Stock Option Plan, as amended by Amendment No. 1 (2)                                            
|              | 
|10(g)         |  | American Dental Partners, Inc. Amended and Restated 1996 Affiliate Stock Option Plan, as amended by Amendments No.1, No. 2 and No. 3 (4)             
|              | 
|10(h)         |  | American Dental Partners, Inc. Amended and Restated 1996 Directors Stock Option Plan, as amended by Amendments No. 1, No. 2, No. 3 and No. 4 (4)     
|              | 
|10(i)         |  | Amendment No. 5 to Amended and Restated 1996 Directors Stock Option Plan (6)                                                                         
|              | 
|10(j)         |  | American Dental Partners, Inc. 1999 Restricted Stock Plan (7)                                                                                        
|              | 
|10(k)         |  | Amendment No. 1 to American Dental Partners, Inc. Amended and Restated 1999 Restricted Stock Plan (5)                                                
|              | 
|10(l)         |  | Amended and Restated Employment and Non-Competition Agreement dated January 2, 2001, between American Dental Partners, Inc. and Gregory A. Serrao (8)
|              | 
|10(t)         |  | Amendment No. 6 to American Dental Partners, Inc. Amended and Restated 1996 Stock Option Plan (11)                                                   
|              | 
|10(u)         |  | Amendment No. 4 to American Dental Partners, Inc. Amended and Restated 1996 Affiliate Stock Option Plan (11)                                         
|              | 
|10(v)         |  | Amendment No. 2 to American Dental Partners, Inc. 1996 Time Accelerated Stock Option Plan (11)                                                       
|              | 
|10(w)         |  | Amended Exhibit A-1 to Amended and Restated Service Agreement dated January 1, 2003, between PDHC, Ltd. and PDG, P.A. (12)                           
|              | 
|10(x)         |  | Credit Agreement dated October 16, 2003 among American Dental Partners, Inc., the Lenders Party Hereto and KeyBank National Association as Agent (13)
|              | 
|10(y)         |  | Amended Exhibit A-1 to Amended and Restated Service Agreement dated January 1, 2004, between PDHC, Ltd. and PDG, P.A. (14)                           
|              | 
|10(z)         |  | Amendment No. 7 to American Dental Partners, Inc. Amended and Restated 1996 Directors Stock Option Plan (14)                                         
|              | 
|10(aa)        |  | Amendment No. 7 to American Dental Partners, Inc. Amended and Restated 1996 Stock Option Plan (15)                                                   
|              | 
|10(bb)        |  | Amendment No. 4 to American Dental Partners, Inc. 1997 Employee Stock Purchase Plan (15)                                                             
|              | 
|10(cc)        |  | Amendment No. 2 to American Dental Partners, Inc. 1999 Restricted Stock Plan (15)                                                                    



72



---

##### Table of Contents

EXHIBIT INDEX (cont.)



|       |  |                                                                                                                                                                                                                                                                                                                                
|------ |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|10(dd) |  | Amended and Restated Credit Agreement dated February 22, 2005 among American Dental Partners, Inc., the Lenders Named Herein and KeyBank National Association as Agent (16)                                                                                                                                                    
|       | 
|10(ee) |  | Amended and Restated Subsidiary Guaranty dated February 22, 2005 between The Subsidiaries of American Dental Partners, Inc. and KeyBank National Association (16)                                                                                                                                                              
|       | 
|10(ff) |  | Amended and Restated Pledge and Security Agreement dated February 22, 2005 between American Dental Partners, Inc. and its subsidiaries and KeyBank National Association (16)                                                                                                                                                   
|       | 
|10(gg) |  | Amended and Restated Service Agreement dated January 1, 1999 between Smileage Dental Care, Inc. and Wisconsin Dental Group, S.C. (18).                                                                                                                                                                                         
|       | 
|10(hh) |  | Amendment No. 1 to Amended and Restated Service Agreement dated October 1, 2000 between Wisconsin Dental Group, S.C. and Northpark Dental Group, Inc. (18)                                                                                                                                                                     
|       | 
|10(ii) |  | Amendment No. 2 to Amended and Restated Service Agreement dated January 1, 2001 between Wisconsin Dental Group, S.C. and Northpark Dental Group, Inc. (18).                                                                                                                                                                    
|       | 
|10(jj) |  | Amendment No. 3 to Amended and Restated Service Agreement dated July 1, 2003 between Wisconsin Dental Group, S.C. and Northpark Dental Group, Inc. (18)                                                                                                                                                                        
|       | 
|10(kk) |  | Amended Exhibit A-1 to Amended and Restated Service Agreement dated January 1, 2004 between Wisconsin Dental Group, S.C. and Northpark Dental Group, Inc. (18)                                                                                                                                                                 
|       | 
|10(ll) |  | Amended 2005 Equity Incentive Plan (19)                                                                                                                                                                                                                                                                                        
|       | 
|10(mm) |  | Amended 2005 Directors Stock Option Plan (19)                                                                                                                                                                                                                                                                                  
|       | 
|10(nn) |  | Nonqualified Stock Option Agreement for 2005 Equity Incentive Plan (19)                                                                                                                                                                                                                                                        
|       | 
|10(oo) |  | Nonqualified Stock Option Agreement for 2005 Directors Stock Option Plan (19)                                                                                                                                                                                                                                                  
|       | 
|10(pp) |  | Written Description of the Companys Executive Bonus Plan (20)                                                                                                                                                                                                                                                                 
|       | 
|10(qq) |  | Second Amendment to Amended and Restated Service Agreement dated August 10, 2005 between PDHC, Ltd. and PDG, P.A (21)                                                                                                                                                                                                          
|       | 
|10(rr) |  | Fourth Amendment to Amended and Restated Service Agreement dated January 1, 2005 between Wisconsin Dental Group, S.C. and Northpark Dental Group, LLC (22)                                                                                                                                                                     
|       | 
|10(ss) |  | Contribution Agreement among Care for Kids  USA, LLC and the Tooth Doctor entities and owners dated October 25, 2006 (23)                                                                                                                                                                                                     
|       | 
|10(tt) |  | Limited Liability Company Agreement of Care for Kids  USA, LLC, dated December 1, 2006 (23)                                                                                                                                                                                                                                   
|       | 
|10(uu) |  | Omnibus Amendment Agreement and Waiver, dated as of January 24, 2007, by and among American Dental Partners, Inc. and its Subsidiaries, the lending institutions party to the Credit Agreement,
and KeyBank National Association, as administrative agent for the lenders (24)                                                 
|       | 
|10(vv) |  | Amendment No. 2 to Amended and Restated Credit Agreement dated as of February 21, 2007, by and among American Dental Partners, Inc. and its Subsidiaries, the lending institutions party to the
Credit Agreement and JP Morgan Chase Bank, N.A., and KeyBank National Association, as administrative agent for the lenders (25)
|       | 
|14.1   |  | American Dental Partners, Inc. Code of Business Conduct and Ethics (17)                                                                                                                                                                                                                                                        
|       | 
|21     |  | Subsidiaries of American Dental Partners, Inc., filed herewith.                                                                                                                                                                                                                                                                
|       | 
|23     |  | Consent of PricewaterhouseCoopers LLP, filed herewith.                                                                                                                                                                                                                                                                         
|       | 
|31.1   |  | Certification of Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002, filed herewith.                                                                                                                                                                                                            



73



---

##### Table of Contents

EXHIBIT INDEX (cont.)



|     |  |                                                                                                                    
|---- |  | -------------------------------------------------------------------------------------------------------------------
|31.1 |  | Certification of Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002, filed herewith.
|     | 
|32.1 |  | Certification of Chief Executive Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, filed herewith.
|     | 
|32.2 |  | Certification of Chief Financial Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, filed herewith.



|(1) | Incorporated by reference to Amendment No. 1 to the Companys Registration Statement on Form S-1 (Registration No. 333-39981) filed on December 31, 1997.
|--- | ---------------------------------------------------------------------------------------------------------------------------------------------------------

|(2) | Incorporated by reference to the Companys Registration Statement on Form S-1 (Registration No. 333-39981) filed on November 12, 1997.
|--- | --------------------------------------------------------------------------------------------------------------------------------------

|(3) | Incorporated by reference to the Companys Registration Statement on Form S-4 (Registration No. 333-56941) filed on June 16, 1998.
|--- | ----------------------------------------------------------------------------------------------------------------------------------

|(4) | Incorporated by reference to the Companys Form 10-K filed on March 16, 2000.
|--- | -----------------------------------------------------------------------------

|(5) | Incorporated by reference to the Companys Form 10-Q filed on November 13, 2001.
|--- | --------------------------------------------------------------------------------

|(6) | Incorporated by reference to the Companys Form 10-Q filed on August 12, 2002.
|--- | ------------------------------------------------------------------------------

|(7) | Incorporated by reference to the Companys Form 10-Q filed on November 10, 1999.
|--- | --------------------------------------------------------------------------------

|(8) | Incorporated by reference to the Companys Form 10-K filed on March 23, 2001.
|--- | -----------------------------------------------------------------------------

|(9) | Incorporated by reference to the Companys Form 10-Q filed on August 13, 2001.
|--- | ------------------------------------------------------------------------------

|(10) | Incorporated by reference to the Companys Form 10-K filed on March 20, 2003.
|---- | -----------------------------------------------------------------------------

|(11) | Incorporated by reference to the Companys Form 10-Q filed on May 15, 2003.
|---- | ---------------------------------------------------------------------------

|(12) | Incorporated by reference to the Companys Form 10-Q filed on August 8, 2003.
|---- | -----------------------------------------------------------------------------

|(13) | Incorporated by reference to the Companys Form 10-Q filed on November 5, 2003.
|---- | -------------------------------------------------------------------------------

|(14) | Incorporated by reference to the Companys Form 10-Q filed on May 13, 2004.
|---- | ---------------------------------------------------------------------------

|(15) | Incorporated by reference to the Companys Form 10-Q filed on August 11, 2004.
|---- | ------------------------------------------------------------------------------

|(16) | Incorporated by reference to the Companys Form 8-K filed on February 28, 2005.
|---- | -------------------------------------------------------------------------------

|(17) | Incorporated by reference to the Companys Form 10-K filed on March 17, 2004.
|---- | -----------------------------------------------------------------------------

|(18) | Incorporated by reference to the Companys Form 10-K filed on March 14, 2005.
|---- | -----------------------------------------------------------------------------

|(19) | Incorporated by reference to the Companys Form 8-K filed on July 18, 2005.
|---- | ---------------------------------------------------------------------------

|(20) | Incorporated by reference to the Companys Form 8-K filed on April 20, 2005.
|---- | ----------------------------------------------------------------------------

|(21) | Incorporated by reference to the Companys Form 8-K filed on August 16, 2005.
|---- | -----------------------------------------------------------------------------

|(22) | Incorporated by reference to the Companys Form 10-K filed on March 10, 2006.
|---- | -----------------------------------------------------------------------------

|(23) | Incorporated by reference to the Companys Form 8-K filed on December 4, 2006.
|---- | ------------------------------------------------------------------------------

|(24) | Incorporated by reference to the Companys Form 8-K filed on January 30, 2007.
|---- | ------------------------------------------------------------------------------

|(25) | Incorporated by reference to the Companys Form 8-K filed on February 22, 2007.
|---- | -------------------------------------------------------------------------------



74