Document:

Exhibit 4.1.6

                         AMENDMENT AGREEMENT NO. 4

                  AMENDMENT AGREEMENT NO. 4 dated as of June 15, 2000 (this
"Agreement"), to the AMENDED AND RESTATED CREDIT AGREEMENT, dated as of June 15,
1999 (as heretofore amended and as may be further amended, modified or
supplemented from time to time the "Credit Agreement"), among GENTLE DENTAL
SERVICE CORPORATION, a Washington corporation ("Dental Service"), GENTLE DENTAL
MANAGEMENT, INC., a Delaware corporation ("Dental Management") and DENTAL CARE
ALLIANCE, INC., a Delaware corporation ("DCA"; DCA, Dental Service and Dental
Management, each a "Borrower" and collectively, the "Borrowers"), the Guarantors
named therein, the financial institutions from time to time party thereto
(collectively, the "Lenders"), UNION BANK OF CALIFORNIA, N.A., as administrative
agent for the Lenders (in such capacity, the "Administrative Agent") and THE
CHASE MANHATTAN BANK ("Chase") , as syndication agent for the Lenders (in such
capacity, the "Syndication Agent").

                  WHEREAS, the Borrowers, the Guarantors and the Lenders desire
to amend certain provisions of the Credit Agreement as set forth herein;

                  NOW, THEREFORE, the Borrowers, the Guarantors, the Lenders,
the Administrative Agent and the Syndication Agent hereby agree as follows:

SECTION 1 CAPITALIZED TERMS. Capitalized terms used herein and not defined shall
have the respective meanings assigned to such terms in the Credit Agreement.

SECTION 2 AMENDMENTS TO THE CREDIT AGREEMENT. Upon the fulfillment of the
conditions set forth in Section 4 hereof the Credit Agreement is hereby amended
as follows:

2.1  Section 1.01 of the Credit Agreement is hereby amended by adding the
     following definitions in the appropriate alphabetical order:

                           "`Senior Subordinated Note' shall mean the Borrowers'
                  Senior Subordinated Note due September 30, 2005 in the
                  original principal amount of $25,500,000, and all instruments
                  or documents related thereto, including, without limitation,
                  the Securities Purchase Agreement referred to therein, in each
                  case as amended, modified or supplemented from time to time in
                  accordance with their respective terms and the limitations set
                  forth in Section 7.17 hereof and the Subordination Agreement.

<PAGE>

                           `Subordination Agreement' shall mean the
                  Subordination Agreement made as of June 15, 2000 among the
                  Administrative Agent, the holder of the Senior Subordinated
                  Note, the Borrowers and Holdings."

2.2      The definition of "Adjusted Total Funded Debt" contained in Section
         1.01 of the Credit Agreement is hereby amended by adding the phrase
         "but shall include the Senior Subordinated Note" at the end of the
         proviso in the first sentence thereof.

2.3  Clause (i)(x) of the definition of "Fixed Charge Coverage Ratio" contain in
     Section 1.01 of the Credit Agreement is hereby amended in its entirety to
     read as follows:

                           "(i) the sum of (x) Funds Flow from Operations of
                           such person for such period plus the unused (treating
                           Letter of Credit usage as usage) availability under
                           the Total Revolving Credit Commitment and the `Total
                           Revolving Credit Commitment' under the 2000 Credit
                           Agreement as of the date of determination less"

2.4      The definition of "Subordinated Indebtedness" contained in Section1.01
         of the Credit Agreement is hereby amended by adding the phrase "and the
         Senior Subordinated Note" immediately following the term "Convertible
         Subordinated Notes" referred to therein.

2.5  Article VII of the Credit Agreement is hereby amended by adding a new
     Section 7.21 at the end thereof to read in its entirety as follows:

                           "Section 7.21. Minimum Annual EBITDA. Permit for each
                  of the Fiscal Years listed in the table below, EBITDA of
                  Holdings and its subsidiaries on a Consolidated basis to be
                  less than the total amount set forth opposite such Fiscal
                  Year:

                           Fiscal Year Ending:         Minimum Annual EBITDA
                           ------------------          ---------------------

                           December 31, 2001                $26,450,000

                           December 31, 2002                 29,900,000

                           December 31, 2003                 33,810,000

                           December 31, 2004                 38,180,000

2.6  The first parenthetical of clause (g) of Article VIII of the Credit
     Agreement is hereby amended in its entirety to read as follows:

<PAGE>

                    "(excluding Indebtedness outstanding hereunder or under the
                           Senior Subordinated Note.)"

2.7  Article VIII of the Credit Agreement is hereby amended by (i) adding an
     "or" at the end of clause (n) thereof and (ii) adding a new clause (o) at
     the end thereof to read as follows:

                                    "(o) default shall be made with respect to
                  any Indebtedness or obligations under the Senior
                  Subordinated Note;"

2.8  Clause (iii) of Section 11.08(b) of the Credit Agreement is hereby amended
     by adding the following parenthetical after the word "Collateral:"

                           "(or grant any other Lien on any of the Collateral)"

SECTION 3 CONFIRMATION OF LOAN DOCUMENTS. Each Loan Party, by its execution and
delivery of this Agreement, irrevocably and unconditionally ratifies and
confirms in favor of the Administrative Agent that it consents to the terms and
conditions of the Credit Agreement as it has been amended by this Agreement and
that notwithstanding this Agreement, each Loan Document to which such Loan Party
is a party shall continue in full force and effect in accordance with its terms,
as it has been amended on the date hereof, and is and shall continue to be
applicable to all of the Obligations.

SECTION 4 CONDITIONS PRECEDENT. This Agreement shall become effective upon the
execution and delivery of counterparts hereof by the Borrowers, the Guarantors,
the Required Lenders and each of the Agents to the Administrative Agent and the
fulfillment of the following conditions:

4.1  All legal matters in connection with this Agreement shall be satisfactory
     to the Agents and their respective counsel in their sole discretion.

4.2      The Administrative Agent shall have received a certificate signed by a
         Financial Officer of each Borrower and Guarantor that (i) both before
         and after giving effect to the transactions contemplated herein all
         representations and warranties contained in this Agreement or otherwise
         made in writing to the Administrative Agent in connection herewith
         shall be true and correct in all material respects on and as of the
         date hereof (except insofar as such representations and warranties
         relate expressly to an earlier date) and (ii) both before and after
         giving effect to the transactions contemplated herein there exists no
         unwaived Default or Event of Default.

<PAGE>

4.3      Messrs. Kaye, Scholer, Fierman, Hays & Handler, LLP and Buchalter,
         Nemer, Fields & Younger, counsel to the Agents, shall have received
         payment in full for all unpaid legal fees charged, and all costs and
         expenses incurred, by such counsel through the date hereof and all
         legal fees charged, and all costs and expenses incurred, by such
         counsel in connection with the transactions contemplated under this
         Agreement and the other Loan Documents and instruments in connection
         herewith and therewith.

4.4  The Administrative Agent shall have received such other documents as the
     Agents or their counsel shall reasonably deem necessary.

SECTION 5         MISCELLANEOUS.
                  --------------

5.1      Each Borrower and each Guarantor reaffirms and restates the
         representations and warranties set forth in Article IV of the Credit
         Agreement, as amended by this Agreement and after giving effect to the
         transactions contemplated herein, and all such representations and
         warranties shall be true and correct in all material respects on and as
         of the date hereof (except insofar as such representations and
         warranties relate expressly to an earlier date). Each Loan Party
         represents and warrants (which representations and warranties shall
         survive the execution and delivery hereof) to the Agent that:

                  (a) It has the corporate power and authority to execute,
         deliver and carry out the terms and provisions of this Agreement and
         the transactions contemplated hereby and has taken or caused to be
         taken all necessary corporate action to authorize the execution,
         delivery and performance of this Agreement and the transactions
         contemplated hereby;

                  (b) No consent of any other person (including, without
         limitation, shareholders or creditors of any Loan Party), and no action
         of, or filing with any governmental or public body or authority is
         required to authorize, or is otherwise required in connection with the
         execution, delivery and performance of this Agreement;

                  (c) This Agreement has been duly executed and delivered on
         behalf of each Loan Party by a duly authorized officer, and constitutes
         a legal, valid and binding obligation of each Loan Party enforceable in
         accordance with its terms, subject to bankruptcy, reorganization,
         insolvency, moratorium and other similar laws affecting the enforcement
         of creditors' rights generally and the exercise of judicial discretion
         in accordance with general principles of equity; and

<PAGE>

                  (d) The execution, delivery and performance of this Agreement
         will not violate any law, statute or regulation, or any order or decree
         of any court or governmental instrumentality, or conflict with, or
         result in the breach of, or constitute a default under any contractual
         obligation of any Loan Party.

5.2      Except, as herein expressly amended, the Credit Agreement is ratified
         and confirmed in all respects and shall remain in full force and effect
         in accordance with its terms.

5.3      All references to the Credit Agreement contained in the Credit
         Agreement and the other Loan Documents and the other documents and
         instruments delivered pursuant to or in connection therewith shall mean
         the Credit Agreement, as amended hereby and as may in the future be
         amended, restated, supplemented or modified from time to time.

5.4      This Agreement may be executed by the parties hereto individually or in
         combination, in one or more counterparts, each of which shall be an
         original and all of which shall constitute one and the same agreement.

5.5      Delivery of an executed counterpart of a signature page to this
         Agreement by telecopier shall be effective as delivery of a
         manually executed counterpart of this Agreement.

5.6      THIS AGREEMENT SHALL BE GOVERNED BY, AND CONSTRUED AND INTERPRETED IN
         ACCORDANCE WITH, THE LAWS OF THE STATE OF CALIFORNIA WITHOUT REGARD TO
         CHOICE OR CONFLICT OF LAW PRINCIPLES THEREOF.

5.7      The parties hereto shall, at any time and from time to time following
         the execution of this Agreement, execute and deliver all such further
         instruments and take all such further actions as may be reasonably
         necessary or appropriate in order to carry out the provisions of this
         Agreement.

<PAGE>

                  IN WITNESS WHEREOF, the Borrowers, Guarantors, the
Administrative Agent, the Syndication Agent and the Required Lenders have caused
this Agreement to be duly executed by their respective authorized officers as of
the day and year first above written.

                                   GENTLE DENTAL SERVICE CORPORATION,
as a Borrower

                                   By:                  MICHAEL THOMAS FIORE
                                                        --------------------
                                            Name:  Michael T. Fiore
                                            Title:     President

                                   GENTLE DENTAL MANAGEMENT, INC.,
                                   as a Borrower

                                   By:                  MICHAEL THOMAS FIORE
                                                        --------------------
                                            Name:  Michael T. Fiore
                                            Title:     President

                                   DENTAL CARE ALLIANCE, INC.,
                                   as a Borrower

                                   By:                 DAVID P. NICHOLS
                                                       ----------------
                                            Name: David P. Nichols
                                            Title:    Chief Financial Officer

                                   GMS HAWAII ACQUISITION COMPANY, as aGuarantor

                                   By:                  MICHAEL THOMAS FIORE
                                                        --------------------
                                            Name:  Michael T. Fiore
                                            Title:     President

<PAGE>

                                   GMS DENTAL GROUP MANAGEMENT OF HAWAII, INC.,
                                      as a Guarantor

                                   By:                  MICHAEL THOMAS FIORE
                                                        --------------------
                                            Name:  Michael T. Fiore
                                            Title:     President

                                   GMS DENTAL GROUP MANAGEMENT OF SOUTHERN
                                      CALIFORNIA, INC., as a Guarantor

                                   By:                  MICHAEL THOMAS FIORE
                                                        --------------------
                                            Name:  Michael T. Fiore
                                            Title:     President

                                   GMS DENTAL GROUP MANAGEMENT OF THE MOUNTAIN
                                       STATES, INC., as a Guarantor

                                   By:                  MICHAEL THOMAS FIORE
                                                        --------------------
                                            Name:  Michael T. Fiore
                                            Title:     President

                                   GENTLE DENTAL MANAGEMENT - PACIFIC NORTHWEST,
                                          INC., as a Guarantor

                                   By:                  MICHAEL THOMAS FIORE
                                                        --------------------
                                            Name:  Michael T. Fiore
                                            Title:     President

                                   GENTLE DENTAL OF IRVINE, as a  Guarantor

                                   By:                  MICHAEL THOMAS FIORE
                                                        --------------------
                                            Name:  Michael T. Fiore
                                            Title:     President

<PAGE>

                                   GDSC OF PIEDMONT, INC., as a Guarantor

                                   By:                  MICHAEL THOMAS FIORE
                                                        --------------------
                                            Name:  Michael T. Fiore
                                            Title:     President

                                   GENTLE DENTAL LEGACY, INC.,
                                   as a Guarantor

                                   By:                  MICHAEL THOMAS FIORE
                                                        --------------------
                                            Name:  Michael T. Fiore
                                            Title:     President

                                   DENTAL CARE ALLIANCE OF FLORIDA, INC., as a
                                     Guarantor

                                   By:                 DAVID P. NICHOLS
                                                       ----------------
                                            Name: David P. Nichols
                                            Title:     Chief Financial Officer

                                   DENTAL CARE ALLIANCE OF MICHIGAN, INC., as a
                                       Guarantor

                                   By:                 DAVID P. NICHOLS
                                                       ----------------
                                            Name: David P. Nichols
                                            Title:     Chief Financial Officer

                                   DENTAL CARE ALLIANCE OF GEORGIA, INC., as a
                                     Guarantor

                                   By:                 DAVID P. NICHOLS
                                                       ----------------
                                            Name: David P. Nichols
                                            Title:     Chief Financial Officer

<PAGE>

                                   DENTAL CARE ALLIANCE OF INDIANA, INC.,
                                       as a Guarantor

                                   By:                 DAVID P. NICHOLS
                                                       ----------------
                                            Name: David P. Nichols
                                            Title:     Chief Financial Officer

                                   DENTAL ONE ASSOCIATES, INC., as a Guarantor

                                   By:                 DAVID P. NICHOLS
                                                       ----------------
                                            Name: David P. Nichols
                                            Title:     Chief Financial Officer

                                   DENTAL CARE ALLIANCE OF PENNSYLVANIA, INC.,
                                     as a Guarantor

                                   By:                 DAVID P. NICHOLS
                                                       ----------------
                                            Name: David P. Nichols
                                            Title:     Chief Financial Officer

                                   SERRA PARK DENTAL SERVICES, INCORPORATED,
                                     as a Guarantor

                                   By:                  MICHAEL THOMAS FIORE
                                                        --------------------
                                            Name:  Michael T. Fiore
                                            Title:     President

                                   SPDS DMI, INCORPORATED, as a Guarantor

                                   By:                  MICHAEL THOMAS FIORE
                                                        --------------------
                                            Name:  Michael T. Fiore
                                            Title:     President

<PAGE>

                                   UNION BANK OF CALIFORNIA, N.A., as
                                      Administrative Agent and as a Lender

                                   By:                 NANCY PERKINS
                                                       -------------
                                            Name: Nancy A. Perkins
                                            Title:    Vice President

                                   THE CHASE MANHATTAN BANK, as Syndication
                                       Agent and as a Lender

                                   By:                 CAROL EDKINS
                                                       ------------
                                            Name: Carol A. Edkins
                                            Title:    Vice President

                                   U.S. BANK NATIONAL ASSOCIATION, as a Lender

                                   By:                 MARK OLAN
                                                       ---------
                                            Name: Mark. R. Olan
                                            Title:    Sr. Vice President

                                   FLEET CAPITAL CORPORATION, as a Lender

                                   By:
                                      ----------------------------------
                                            Name:
                                            Title:

                                   BANK OF AMERICA, N.A. (successor by merger
                                     to NationsBank, N. A.), as a Lender

                                   By:__________________________________
                                            Name:
                                            Title:

<PAGE>

                                   FIRST NATIONAL BANK, as a Lender

                                   By:                 DAVID S. WALTERS
                                                       ----------------
                                            Name: David S. Walters
                                            Title:    Vice President

                                   CITIZENS BANK OF MASSACHUSETTS,
                                   as a Lender

                                   By:                 MICHAEL OVELLET
                                                       ---------------
                                            Name: Michael Ovellet
                                            Title:    Asst. Vice President

                                   SOVEREIGN BANK, as a Lender

                                   By:                 J BECKER
                                                       --------
                                            Name: J Becker
                                            Title:    Sr. Vice President

Solely as to Sections 3 and 5:   INTERDENT, INC., as a Guarantor

                                   By:                  MICHAEL THOMAS FIORE
                                                        --------------------
                                            Name:  Michael T. Fiore
                                            Title:     PresidentAMENDMENT AGREEMENT NO. 8

         AMENDMENT AGREEMENT NO. 8, effective as of April 15, 2002 (this
"Amendment"), to the AMENDED AND RESTATED CREDIT AGREEMENT, dated as of June 15,
1999 (as heretofore amended and as may be further amended, modified or
supplemented from time to time the "Credit Agreement"), among GENTLE DENTAL
SERVICE CORPORATION, a Washington corporation ("Dental Service"), GENTLE DENTAL
MANAGEMENT, INC., a Delaware corporation ("Dental Management"; Dental Service
and Dental Management, each a "Borrower" and collectively, the "Borrowers"), the
Guarantors named therein, the financial institutions from time to time party
thereto (collectively, the "Lenders"), UNION BANK OF CALIFORNIA, N.A., as
administrative agent for the Lenders (in such capacity, the "Administrative
Agent"), and JPMORGAN CHASE BANK, formerly known as THE CHASE MANHATTAN BANK, as
syndication agent for the Lenders (in such capacity, the "Syndication Agent").

         WHEREAS, the Borrowers have requested that the Lenders amend, and the
Lenders have agreed to amend, the Credit Agreement in certain respects;

         NOW, THEREFORE, the Borrowers, the Guarantors, the Lenders, the
Administrative Agent and the Syndication Agent hereby agree as follows:

SECTION 1. CAPITALIZED TERMS. Capitalized terms used herein and not defined
shall have the respective meanings assigned to such terms in the Credit
Agreement.

SECTION 2. AMENDMENTS TO THE CREDIT AGREEMENT. Upon the fulfillment of the
conditions set forth in Section 5 hereof, the Credit Agreement is hereby amended
as follows:

         DEFINITIONS. 1. Section 1.01 of the Credit Agreement is hereby amended
by adding the following definitions:

         "Amendment Fee" shall mean the fees earned by the Lenders pursuant to
Section 2.06(a).

         "Amendment Fee Date" shall mean July 1, 2002 or October 1, 2002 or such
         later Repayment Date on which a portion of the Amendment Fee is
         scheduled to be earned pursuant to Section 2.06(a).

         "Eighth Amendment Date" shall mean April 15, 2002.

         "Fee" shall mean the fees specified in Section 2.06, including the
Amendment Fee.

         "PIK Amounts" shall mean all PIK Fees and PIK Interest.

         "PIK Fee" shall mean the fees that are paid-in-kind pursuant to
Sections 2.06 and 2.17.

         "PIK Interest" shall mean interest accrued on the Loans at the PIK
         Interest Rate, which shall be paid-in-kind pursuant to Section 2.05(c).

         "PIK Interest Rate" shall mean the incremental rate at which interest
         (to be paid-in-kind) shall accrue on the Loans equal to 1.00% from the
         Eighth Amendment Date through March 31, 2003 and 2.00% from April 1,
         2003 through the Final Maturity Date.

         "Quarterly Amount" shall mean an amount equal to $6,428,571.42 for each
Repayment Date.

         "Seller/Earnout Payments" shall mean cash payments in respect of Seller
         Notes and Earnout Arrangements made during the period from April 8,
         2002 through April 30, 2003.

A. Section 1.01 of the Credit Agreement is hereby amended by deleting the
definition of the terms `Adjusted Senior Debt', `Bank Loans', `EBITDA',
`Interest Margin', `Leverage Ratio' and `Term Loan' and inserting the following
in lieu thereof:

         "Adjusted Senior Debt" shall mean, at any date, (i) the outstanding
         principal amount of Bank Loans, exclusive of PIK Amounts and "PIK
         Amounts", as defined in the 2000 Credit Agreement, plus (ii)
         Capitalized Lease Obligations.

         "Bank Loans" shall mean Loans, including PIK Amounts that have accrued
         and been earned pursuant hereto, and "Loans", as defined in the 2000
         Credit Agreement, including "PIK Amounts", as defined in the 2000
         Credit Agreement, that have accrued and been earned pursuant to the
         2000 Credit Agreement.

         "EBITDA" shall mean, with respect to any person for any period, without
         duplication, the sum of (i) Net Income, (ii) Interest Expense, (iii)
         depreciation and amortization and other non-cash items (other than any
         provision for bad debt) properly deducted in determining Net Income and
         (iv) federal, state and local income taxes, in each case of such person
         for such period minus interest income, calculated in accordance with
         GAAP.

         "Interest Margin" shall mean, effective on the Eighth Amendment Date,
         with respect to any Eurodollar Loan, 7.50% or, with respect to any
         Alternative Base Loan, 5.75% plus in each case the PIK Interest Rate.
         Notwithstanding the foregoing, effective on October 1, 2002, each of
         the foregoing Interest Margins shall be increased by 1.00%.

         "Leverage Ratio" shall mean, with respect to any person for any period,
         the ratio of (i) Adjusted Senior Debt as at the date of determination
         to (ii) EBITDA of such person for such period. For purposes of
         calculating the Leverage Ratio for the period ending March 31, 2002,
         EBITDA for the fiscal quarter then ended shall be multiplied by 4; for
         purposes of calculating the Leverage Ratio for the period ending June
         30, 2002, EBITDA for the two fiscal quarters then ended shall be
         multiplied by 2; for purposes of calculating the Leverage Ratio for the
         period ending September 30, 2002, EBITDA for the three fiscal quarters
         then ended shall be multiplied by 1.33; and for purposes of calculating
         the Leverage Ratio for all subsequent periods EBITDA for the four
         fiscal quarters then ended shall be used.

          "Term Loan" shall mean the Term Loan made on the Conversion Date
         pursuant to Sections 2.01(b) and 2.02 hereof, and shall include PIK
         Amounts that have accrued and been earned pursuant hereto.

                  THE LOANS.

B. Section 2.04(c) of the Credit Agreement is hereby amended by deleting it in
its entirety and inserting the following in lieu thereof:

                  "(c) Subject to Section 2.09(g), the aggregate principal
         amount of the Term Loan, as evidenced by the Term Notes, shall be
         payable in consecutive quarterly installments on the first Business Day
         of each October, January, April and July of each year and the Final
         Maturity Date (the date of each such installment, a "Repayment Date").
         Commencing July 1, 2002, such installments shall be in the amounts set
         forth opposite each Repayment Date in the table below:

Date                                          Amount*
----                                          -------
July 1, 2002                                  $267,326.73
October 1, 2002                                267,326.73
January 1, 2003                                267,326.73
April 1, 2003                                6,428,571.42
July 1, 2003                                 6,428,571.42
September 30, 2003                          57,055,162.46
-------------------
* Amount shown does not include PIK Amounts.

                  Such payments shall be distributed ratably among the Lenders
         in accordance with their pro rata share of the Term Loan.
         Notwithstanding anything herein to the contrary, the final installment
         under each Term Note shall be in the amount of the unpaid principal
         balance of such Term Note and shall be payable on the Final Maturity
         Date.

                  To the extent not previously paid, the Term Loan, including
         all PIK Amounts, shall be due and payable in cash on the Final Maturity
         Date. Each Term Note shall evidence PIK Amounts accruing with respect
         to the Term Loan of such Lender and shall bear interest from its date
         on the outstanding principal balance thereof (including any accrued PIK
         Amounts), as provided in Section 2.05. All principal payments in
         respect of the Term Loan shall be accompanied by accrued interest on
         the principal amount being repaid to the date of payment. No scheduled
         payment of principal in respect of the Term Loan shall be made to the
         extent that a lesser principal payment would result in the payment in
         full of the outstanding amount of the Term Loan (including PIK
         Amounts), and such lesser amount is paid."

C. Section 2.05(c) of the Credit Agreement is hereby amended by deleting the
first sentence thereof and inserting the following in lieu thereof:

                  "Interest on the Term Loan shall be payable in arrears in cash
         on each applicable Interest Payment Date and on the Final Maturity
         Date, as applicable, except that PIK Interest shall be paid-in-kind on
         the first Business Day of each month and the Final Maturity Date."

D. Section 2.05 of the Credit Agreement is further amended by adding the
following as Section 2.05(d):

                  "(d) Interest on PIK Amounts shall accrue at the Alternate
Base Rate plus the Interest Margin."

E. Section 2.06 of the Credit Agreement is hereby amended to read in full as
follows:

                  "SECTION 2.06  Fees.
                                 ----

                  (a) Unless either (i) all Obligations have been paid in full
         on or before July 1, 2002 or (ii) an amount equal to the Quarterly
         Amount has been paid to the Lenders as a reduction in the principal
         amount of the Term Loans subsequent to the Eighth Amendment Date and on
         or prior to July 1, 2002, an Amendment Fee equal to $222,772.28 shall
         be earned on such date and paid-in-kind. Unless either (i) all
         Obligations have been paid in full on or before October 1, 2002 or (ii)
         an amount equal to the Quarterly Amount has been paid to the Lenders as
         a reduction in the principal amount of the Term Loans subsequent to the
         Eighth Amendment Date and on or prior to October 1, 2002, an additional
         Amendment Fee equal to $222,772.28 shall be earned on such date and
         paid-in-kind. If an amount equal to the Quarterly Amount is paid to the
         Lenders on or before an Amendment Fee Date, the portion of the
         Amendment Fee otherwise scheduled to be earned on such Amendment Fee
         Date shall be earned on the next Repayment Date for which an amount
         equal to the Quarterly Amount is not paid to the Lenders, and the
         portion of the Amendment Fee, if any, otherwise scheduled to be earned
         on such next Repayment Date shall be earned on the following Repayment
         Date for which an amount at least equal to the Quarterly Amount is not
         paid to the Lenders. If the Borrowers pay the Quarterly Amount on each
         Repayment Date, no Amendment Fee shall be earned.

                  (b) Each Lender shall earn a Fee (i) on the Eighth Amendment
         Date equal to one percent (1.00%) of its portion of the Term Loan
         outstanding on such date, (ii) on October 1, 2002 equal to two percent
         (2.00%) of its portion of the Term Loan outstanding on such date and
         (iii) on April 1, 2003 equal to three percent (3.00%) of its portion of
         the Term Loan outstanding on such date. Each fee shall be paid-in-kind.

                  (c) The Lenders and the "Lenders" under the 2000 Credit
         Agreement shall shall earn a Fee on each Repayment Date occurring after
         the date on which the Borrowers shall have made aggregate
         Seller/Earnout Payments in excess of $7,000,000. Such Fee shall equal
         one-half of the Seller/Earnout Payments paid in the fiscal quarter
         ended immediately prior to such Repayment Date, but only to the extent,
         in the case of the first such Fee to be earned, all Seller/Earnout
         Payments exceed $7,000,000 in the aggregate, and shall be paid-in-kind
         (for the ratable benefit of the Lenders hereunder and the "Lenders"
         under the 2000 Credit Agreement). The certificate of the Financial
         Officer of each Borrower pursuant to Section 6.05(e), commencing with
         the fiscal quarter ending June 30, 2002, shall show the amount of the
         Seller/Earnout Payments for such fiscal quarter and on a cumulative
         basis.

                   (d) Each Fee shall bear interest commencing on the date
         earned in the same manner as, and at the rate equal to the rate borne
         by, an Alternate Base Loan from time to time, and shall be payable to
         each Lender in an amount equal to each Lender's pro rata share of the
         outstanding principal balance of the Term Loans."

F. Section 2.09 of the Credit Agreement is hereby amended by deleting paragraph
(e) thereof.

G. Section 2.09 of the Credit Agreement is hereby amended by deleting paragraph
(g) thereof and inserting the following in lieu thereof:

                  "(g) Voluntary prepayments of the Term Loan shall be applied
         pro rata (based on the aggregate of the unpaid amount of the Term Loan
         under this Agreement and the unpaid principal amount of the Term Loan
         under the 2000 Credit Agreement) and, with respect to the portion being
         applied to the Term Loan under this Agreement, to the installments due
         on the next four consecutive Repayment Dates from receipt of the
         prepayment in direct order of maturity and then on a pro rata basis
         over the remaining Repayment Dates. Payments pursuant to paragraph (d)
         or (f) above or paragraph (k) below shall be applied pro rata (based on
         the aggregate of the unpaid principal amount of the Term Loan under
         this Agreement and the unpaid principal amount of the Term Loan under
         the 2000 Credit Agreement) and, (i) with respect to the portion of
         payments pursuant to paragraph (d) or (f) above being applied to the
         Term Loan under this Agreement to the installments due on the next four
         consecutive Repayment Dates from receipt of the prepayment in direct
         order of maturity and then on a pro rata basis over the remaining
         Repayment Dates to the extent of such prepayment, and (ii) with respect
         to the portion of payments pursuant to paragraph (k) below being
         applied to the Term Loan under this Agreement, to the amounts due on
         the Final Maturity Date. Any prepayments required by paragraphs (d),
         (f) and (k) shall be applied first to outstanding Alternate Base Loans
         and then to outstanding Eurodollar Loans. When making a prepayment,
         whether mandatory or otherwise, pursuant to paragraphs (a)-(f) above or
         paragraph (k) below, the Borrowers shall furnish to the Administrative
         Agent, not later than 11:00 A.M. (Los Angeles, California time) three
         (3) Business Days prior to the date of such payment or prepayment,
         written, telex or facsimile notice (promptly confirmed in writing) of
         such prepayment which shall specify the prepayment date and the
         principal amount of each Loan (or portion thereof) to be paid or
         prepaid, which notice shall be irrevocable and shall commit the
         Borrowers to make such payment or prepayment in the amount stated
         therein on the date stated therein. All prepayments of Loans shall be
         accompanied by accrued interest on the principal amount being prepaid
         to the date of prepayment."

H. Section 2.09 of the Credit Agreement is further amended by adding the
following as paragraph (k):

                  "(k) In addition to the mandatory prepayments required by
         other subsections of this Section 2.09, on each date by which the
         Borrowers are required to deliver financial statements to the
         Administrative Agent pursuant to Section 6.05(b), commencing with the
         quarter ending June 30, 2002, the Borrowers shall make a mandatory
         prepayment of the Bank Loans in an amount equal to the excess, if any,
         by which all cash and Cash Equivalents, as shown on the balance sheet
         of the Borrowers and their subsidiaries, as of the end of such quarter,
         exceeds the sum of $4,000,000 plus the amortization payment and cash
         interest payments due with respect to the Bank Loans on the first day
         of the subsequent quarter, such payment or prepayment to be applied as
         set forth in paragraph (g) above; provided that, in determining
         available cash and Cash Equivalents for purposes of this mandatory
         prepayment, Borrowers' usual and customary practices regarding payments
         to vendors shall be observed, and Borrowers shall not accelerate
         payments to vendors or any other party as a means of reducing the
         amount of such mandatory prepayment."

I. Section 2.17 of the Credit Agreement is hereby amended to read in full as
follows:

                  "SECTION 2.17 Incremental Fee. Upon execution of Amendment No.
         6 to this Agreement, the Lenders and the "Lenders" under the 2000
         Credit Agreement shall fully earn a fee equal to $2,000,000 (the
         "Incremental Fee"). The Incremental Fee shall be payable to the
         Administrative Agent (for the ratable benefit of the Lenders hereunder
         and the "Lenders" under the 2000 Credit Agreement) in the following
         manner: (i) $1,000,000 on September 30, 2001 and (ii) $1,000,000 on the
         Final Maturity Date; provided that the portion of the Incremental Fee
         due on September 30, 2001 shall be prepaid in whole or in part upon an
         asset sale or other disposition, a New Capital Transaction or receipt
         of a federal income tax refund as provided in Section 2.09; and
         provided further that the portion of the Incremental Fee referenced in
         clause (ii) above shall be paid-in-kind and bear interest commencing on
         the Eighth Amendment Date at a rate equal to the rate borne by
         Alternate Base Loans from time to time."

         AFFIRMATIVE COVENANTS. Section 6.16 of the Credit Agreement is hereby
amended to read in full as follows.

                  "SECTION 6.16 Assignment of Contract. By May 1, 2002, provide
         to Administrative Agent an updated schedule to the Assignment of
         Contract listing all Management Agreements and related agreements with
         each Affiliated Dental Practice, in a form satisfactory to
         Administrative Agent and counsel to the Lenders."

         NEGATIVE COVENANTS. 1. Section 7.08 of the Credit Agreement is hereby
amended, effective as of March 31, 2002, to read in full as follows:

                  "SECTION 7.08 Cash Flow. Permit Cash Flow at the end of the
         fiscal quarter ended March 31, 2002, the two-fiscal quarter period
         ending June 30, 2002, the three-fiscal quarter period ending September
         30, 2002 and any four-fiscal quarter period ending thereafter to be
         less than the amounts shown below opposite such quarter end date:

                     Quarter Ending                            Cash Flow
        ------------------------------------------          -----------------

                March 31, 2002                                   $2,600,000

                June 30, 2002                                     4,300,000

                September 30, 2002                                8,900,000

                December 31, 2002                                14,100,000

                March 31, 2003                                   16,300,000

                June 30, 2003 and thereafter                     19,800,000"

J. Section 7.09 of the Credit Agreement is hereby amended, effective as of March
31, 2002, to read in full as follows:

                  "SECTION 7.09 Leverage Ratio. Permit the Leverage Ratio of
         Holdings and its subsidiaries (on a Consolidated basis) at the end of
         any fiscal quarter to be greater than:

                      Quarter Ending                             Ratio
        -------------------------------------------         -----------------

                March 31, 2002                                  6.57:1.00

                June 30, 2002                                   7.08:1.00

                September 30, 2002                              5.54:1.00

                December 31, 2002                               4.80:1.00

                March 31, 2003                                  4.18:1.00

                June 30, 2003 and thereafter                    3.51:1.00"

K. Section 7.10 of the Credit Agreement is hereby amended, effective on the
Closing Date, to read in full as follows:

                  "SECTION 7.10 Liquidity. Permit the sum of (i) unused
         commitments under new debt financing ranked junior to the Obligations
         and junior to the 2000 Obligations plus (ii) cash on hand of the
         Borrowers, Holdings and other Guarantors on deposit with the
         Administrative Agent or subject to blocked account agreements, on the
         last day of each month ending after the Closing Date, to be less than
         $500,000."

EXHIBITS. Exhibit L to the Credit Agreement (Form of Covenant Compliance
Certificate) is hereby amended to read as set forth in Exhibit L hereto.

SECTION 3. WAIVER AND CONSENT. A. Subject to the terms and conditions set forth
herein, the Lenders hereby waive compliance with (i) Section 7.08 of the Credit
Agreement (as in effect prior to this Amendment) for the four fiscal quarter
period ended December 31, 2001 and with Section 7.09 of the Credit Agreement (as
in effect prior to this Amendment) for the quarter ended December 31, 2001 and
(ii) Section 6.01 of the Credit Agreement with respect to DentalCo Management
Services of Maryland, Inc., The Dental Center, Inc. and The Dental Center Adult,
Inc. (the "Dissolving Companies").

         B. Subject to the terms and conditions set forth herein, and
notwithstanding the provisions of Section 6.02 and Section 7.05 of the Credit
Agreement, the Lenders hereby consent to the dissolution of the Dissolving
Companies; provided that (i) no Default or Event of Default shall have occurred
and be continuing at the time of the dissolution of any of the Dissolving
Companies or shall result of any such dissolution, (ii) each such dissolution
results in the assets (if any) of the Dissolving Company being assumed by Dental
Service and (iii) simultaneously with each such dissolution, the Borrowers
deliver to the Administrative Agent an officer's certificate, from an officer of
the Dental Service, certifying (a) that (1) the assets (if any) of the
Dissolving Company have been assumed by Dental Service and (2) the security
interest of the Administrative Agent (for the ratable benefit of Lenders) in any
assets of the Dissolving Companies is the subject of an effective financing
statement in favor of the Administrative Agent and (b) balance sheets for Dental
Service and each Dissolving Company immediately prior to the dissolution of such
company and for Dental Service giving effect to such dissolution. Upon delivery
of evidence of the dissolution of each Dissolving Company in form and substance
satisfactory to the Administrative Agent and upon satisfaction of the provisions
of the foregoing sentence, such Dissolving Company shall cease to be a "Grantor"
under the Security Agreement and a Guarantor under the Credit Agreement and the
stock of such Dissolving Company shall no longer be considered "Pledged Stock"
or "Collateral" under the Pledge Agreement. Notwithstanding the foregoing, the
security interest of the Administrative Agent (for the ratable benefit of the
Lenders) in any assets of the Dissolving Companies shall continue.

                  C. Subject to the terms and conditions set forth herein and in
reliance on the representations and warranties of the Borrowers herein
contained, notwithstanding Section 7.17 of the Credit Agreement, the Lenders
hereby consent to the amendments to the Senior Subordinated Note reflected in
the amendment delivered pursuant to Section 5.8 hereof and the amendment to the
Senior Subordinated Note requiring an increase of the rate of interest thereon,
(i) during such time as interest is not paid in cash, to not more than 17%, and
(ii) during such time (after payment of the Obligations in full) as interest is
paid in cash, to not more than 13%, and payment of an amendment fee in the form
of an allonge to the Senior Subordinated Note in form and substance satisfactory
to the Administrative Agent and counsel to the Lenders in an amount not to
exceed $2,000,000.

SECTION 4. LIMITATION OF WAIVER AND CONSENT. Without limiting the generality of
the provisions of Section 11.08 of the Credit Agreement, the waiver and consent
set forth in Section 3 shall be limited precisely as written and is provided
solely with respect to (i) the noncompliance with Sections 6.01, 7.08 and 7.09
of the Credit Agreement as specified in Section 3, (ii) the dissolution of the
Dissolving Companies and (iii) the amendment to the Senior Subordinated Note.
Nothing in this Amendment shall be deemed to constitute (a) a waiver of
noncompliance with Sections 6.01, 7.08 or 7.09 of the Credit Agreement other
than as specified in Section 3, any dissolution of a Borrower or a Guarantor
other than the dissolution of the Dissolving Companies or any other amendment to
the Senior Subordinated Note, (b) a consent to or waiver of noncompliance with
any other term, provision or condition of the Credit Agreement or any other
instrument or agreement referred to therein or (c) a waiver of any other Event
of Default.

SECTION 5. CONDITIONS PRECEDENT. This Amendment shall become effective upon the
execution and delivery of counterparts hereof by the Borrowers, the Guarantors,
the Lenders and each of the Agents to the Administrative Agent and the
fulfillment of the following conditions:

                  The Administrative Agent shall have received evidence that
Amendment Agreement No. 5, dated as of April 15, 2002, to the 2000 Credit
Agreement has been executed and delivered by each of the parties thereto
concurrently with the execution and delivery of this Amendment and that all
conditions to the effectiveness thereof have been fulfilled.

                  The Administrative Agent shall have received a certificate
signed by a Financial Officer of each Borrower that (i) both before and after
giving effect to the transactions contemplated herein all representations and
warranties contained in this Amendment or otherwise made in writing to the
Administrative Agent in connection herewith shall be true and correct in all
material respects on and as of the date hereof (except insofar as such
representations and warranties relate expressly to an earlier date and except
with respect to the failure to maintain inactive subsidiaries in good standing)
and (ii) after giving effect to the transactions contemplated herein, there
exists no unwaived Default or Event of Default.

                  The Administrative Agent shall have received certified copies
of resolutions of the Board of Directors of each Borrower, approving and
authorizing the execution, delivery, and performance of this Amendment,
certified as of the date hereof by its corporate secretary or an assistant
secretary as being in full force and effect without modification or amendment.

                  The Administrative Agent shall have received an opinion of
Morrison & Foerster LLP, counsel to Borrowers, in form and substance
satisfactory to it.

                  The Administrative Agent shall have received an amendment fee
(which shall be in addition to the Amendment Fee referred to in Section 2.06(a)
of the Credit Agreement) equal to $445,544.55 for the account of the Lenders.

                  The Administrative Agent shall have received payment for fees
charged, and all costs and expenses incurred, by counsel to the Lenders that
have been invoiced through the date hereof.

                  The Administrative Agent shall have received an executed
amendment to the Assignment of Contract satisfactory in form and substance to
it.

                  The Administrative Agent shall have received a copy of an
executed amendment, in form and substance satisfactory to the Administrative
Agent, certified by an officer of each Borrower as being a true and correct copy
in full force and effect, to the Senior Subordinated Note providing, among other
things, that the financial covenants applicable to the Senior Subordinated Note
shall be revised so that the levels of the financial covenants applicable to the
Senior Subordinated Note shall not be more restrictive than 85% of the covenant
levels set forth in the Credit Agreement.

                  The Administrative Agent shall have received evidence that the
holders of the Senior Subordinated Note have waived all defaults (if any)
existing immediately prior to the Eighth Amendment Date.

                  The Administrative Agent shall have received signature and
incumbency certificates of the officers of each Borrower.

         The Administrative Agent shall have received from Dental Service and
The Dental Center Adult, Inc. an executed Joinder Agreement.

                  The Administrative Agent shall have received such other
documents as the Lenders or their counsel shall reasonably deem necessary.

SECTION 6. CONFIRMATION OF LOAN DOCUMENTS. Each Loan Party, by its execution and
delivery of this Amendment, irrevocably and unconditionally ratifies and
confirms in favor of the Administrative Agent that it consents to the terms and
conditions of the Credit Agreement as it has been amended by this Amendment and
that notwithstanding this Amendment, each Loan Document to which such Loan Party
is a party shall continue in full force and effect in accordance with its terms,
as it has been amended on the date hereof, and is and shall continue to be
applicable to all of the Obligations.

SECTION 7.        MISCELLANEOUS.
                  -------------

                  In order to induce the Lenders to enter into this Amendment,
each Borrower and each Guarantor, by its execution of a counterpart of this
Amendment, reaffirms and restates the representations and warranties set forth
in Article IV of the Credit Agreement, as amended by this Amendment and after
giving effect to the transactions contemplated herein, and all such
representations and warranties shall be true and correct in all material
respects on and as of the date hereof (except insofar as such representations
and warranties relate expressly to an earlier date and except with respect to
the failure to maintain inactive subsidiaries in good standing). To further
induce the Lenders into this Amendment, each Borrower and each Guarantor, by its
execution of a counterpart of this Amendment, represents and warrants (which
representations and warranties shall survive the execution and delivery hereof)
to the Administrative Agent that:

         It has the corporate power and authority to execute, deliver and carry
out the terms and provisions of this Amendment and the transactions contemplated
hereby and has taken or caused to be taken all necessary corporate action to
authorize the execution, delivery and performance of this Amendment and the
transactions contemplated hereby;

         No consent of any other person (including, without limitation,
shareholders or creditors of any Borrower or any Guarantor), and no action of,
or filing with any governmental or public body or authority is required to
authorize, or is otherwise required in connection with the execution, delivery
and performance of this Amendment;

         This Amendment has been duly executed and delivered on behalf of each
Borrower and each Guarantor by a duly authorized officer, and constitutes a
legal, valid and binding obligation of each Borrower and each Guarantor
enforceable in accordance with its terms, subject to bankruptcy, reorganization,
insolvency, moratorium and other similar laws affecting the enforcement of
creditors' rights generally and the exercise of judicial discretion in
accordance with general principles of equity;

         The execution, delivery and performance of this Amendment will not
violate any law, statute or regulation, or any order or decree of any court or
governmental instrumentality, or conflict with, or result in the breach of, or
constitute a default under any contractual obligation of any Borrower or any
Guarantor;

         Each of the Dissolving Companies has no material assets or liabilities;
and

         There are no defaults existing and continuing under the Senior
Subordinated Note and the Convertible Subordinated Notes, after giving effect to
the documents delivered pursuant to SECTION 5.

         Except, as herein expressly amended, the Credit Agreement is ratified
and confirmed in all respects and shall remain in full force and effect in
accordance with its terms, including, without limitation, the provisions set
forth in Section 11.04 of the Credit Agreement.

                  All references to the Credit Agreement contained in the Credit
Agreement and the other Loan Documents and the other documents and instruments
delivered pursuant to or in connection therewith shall mean the Credit
Agreement, as amended hereby and as may in the future be amended, restated,
supplemented or modified from time to time.

                  This Amendment may be executed by the parties hereto
individually or in combination, in one or more counterparts, each of which shall
be an original and all of which shall constitute one and the same agreement.

                  Delivery of an executed counterpart of a signature page to
this Amendment by telecopier shall be effective as delivery of a manually
executed counterpart of this Amendment.

                  THIS AMENDMENT SHALL BE GOVERNED BY, AND CONSTRUED AND
INTERPRETED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK WITHOUT REGARD
TO CHOICE OR CONFLICT OF LAW PRINCIPLES THEREOF.

                  The parties hereto shall, at any time and from time to time
following the execution of this Amendment, execute and deliver all such further
instruments and take all such further actions as may be reasonably necessary or
appropriate in order to carry out the provisions of this Amendment.

<PAGE>

         IN WITNESS WHEREOF, the Borrowers, Guarantors, the Administrative
Agent, the Syndication Agent and the Lenders have caused this Amendment to be
duly executed by their respective authorized officers as of the day and year
first above written.

                      GENTLE DENTAL SERVICE CORPORATION, as a Borrower
                      By:         /s/ L.T. Van
                           -------------------
                      Eerden
                      ------
                      Name:    L.T. Van Eerden
                             -----------------
                      Title:
                      President
                      ---------
                      GENTLE DENTAL MANAGEMENT, INC., as a Borrower
                      By:         /s/ L.T. Van
                           -------------------
                      Eerden
                      ------
                      Name:    L.T. Van Eerden
                             -----------------
                      Title:
                      President
                      ---------

                      DENTALCO MANAGEMENT SERVICES OF MARYLAND, INC.,
                             as a Guarantor
                      By:         /s/ L.T. Van Eerden
                           --------------------------
                      Name:    L.T. Van Eerden
                      Title:
                      President

                      THE DENTAL CENTER, INC., as a Guarantor
                      By:         /s/ L.T. Van Eerden
                           --------------------------
                      Name:    L.T. Van Eerden
                      Title:
                      President

                      INTERDENT, INC., as a Guarantor

                   By:

                   /s/   H. Wayne Posey
                   -------------------------------------------
                   Name:      H. Wayne Posey
                   Title:    Chairman and Chief Executive Officer

Administrativ Agent:
                   UNION BANK OF CALIFORNIA, N.A.. as Administrative Agent and
                      Lender
                      By:            /s/ Nancy A. Perkins
                      Name:  Nancy A. Perkins
                      Title:    Vice President

<PAGE>

Lenders:              JPMORGAN CHASE BANK, formerly known as THE CHASE
                      MANHATTAN BANK, as Syndication Agent and as a Lender
                      By:           /s/ Eric
                           -----------------
                      Groberg
                      -------
                      Name:  Eric
                           ------
                      Groberg
                      -------
                      Title:    Vice
                              ------
                      President
                      ---------
                      U.S. BANK NATIONAL ASSOCIATION, as Lender
                      By:         /s/ Daniel J.
                           --------------------
                      Falstad
                      -------
                      Name:    Daniel J.
                             -----------
                      Falstad
                      -------
                      Title:      Vice
                                ------
                      President
                      ---------
                      FLEET CAPITAL CORPORATION, as a Lender
                      By:         /s/ Thomas P. Betournay
                           ------------------------------
                      Name:    Thomas P. Betournay
                             ---------------------
                      Title:      Vice
                                ------
                      President
                      ---------
                      ENDEAVOUR LLC, as a Lender
                      By:         /s/ Stuart J.
                           --------------------
                      Lissner
                      -------
                      Name:    Stuart J.
                             -----------
                      Lissner
                      -------
                      Title:      Managing
                                ----------
                      Director
                      --------
                      FIRST NATIONAL BANK, as a Lender
                      By:         /s/ Robert McNamara
                           --------------------------
                      Name:    Robert McNamara
                             -----------------
                      Title:      Vice
                                ------
                      President
                      ---------
                      B III-A CAPITAL PARTNERS, L.P.
                      By: GP III-A, LLC, its General Partner
                      By: DDJ Capital Management, LLC, Manager, as a Lender
                      By:         /s/ David J.
                           -------------------
                      Breazzano
                      ---------
                      Name:    David J. Breazzano
                             --------------------
                      Title:
                      Member
                      ------
                      STATE STREET BANK & TRUST, solely in its capacity as
                      Custodian for General Motors Employees Global Group
                      Pension Trust as directed by DDJ Capital Management,
                      LLC, and not in its individual capacity, as a Lender
                      By:         /s/ Andrew
                           -----------------
                      Hood
                      ----
                      Name:    Andrew
                             --------
                      Hood
                      ----
                      Title:
                      Officer
                      -------
                      PLEASANT STREET INVESTORS, LLC, as a Lender
                      By:
                      /s/
                      ---
                      Name:
                      Title:

<PAGE>

                      THE DENTAL CENTER ADULT, INC., as a Guarantor
                      By:         /s/ L.T. Van Eerden
                           --------------------------
                      Name:    L.T. Van Eerden
                      Title:
                      President

<PAGE>

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