<PAGE>   1



                                                                   EXHIBIT 10.17

                          REGISTRATION RIGHTS AGREEMENT

         This REGISTRATION RIGHTS AGREEMENT (this "Agreement"), dated as of
January __, 2001, is made and entered into by and between PracticeWorks, Inc., a
Delaware corporation (the "Company"), and Crescent International Ltd., an entity
organized and existing under the laws of Bermuda (the "Investor").

         WHEREAS, the Company and the Investor have entered into that certain
Stock Purchase Agreement, dated as of January __, 2001 (the "Stock Purchase
Agreement"), pursuant to which the Company will issue to the Investor, and the
Investor shall purchase, 100,000 shares of Series C Convertible Preferred Stock,
par value $.01 per share, of the Company (the "Preferred Stock"); and

         WHEREAS, pursuant to the terms of, and in partial consideration for,
the Investor's agreement to enter into the Stock Purchase Agreement, the Company
has agreed to provide the Investor with certain registration rights as described
herein;

         NOW, THEREFORE, in consideration of the premises, representations,
warranties, covenants and agreements contained herein and in the Stock Purchase
Agreement, and for other good and valuable consideration, the receipt and
sufficiency of which is hereby acknowledged, intending to be legally bound
hereby, the parties hereto agree as follows (capitalized terms used herein and
not defined herein shall have the respective meanings ascribed to them in the
Stock Purchase Agreement):

                                    ARTICLE I
                               REGISTRATION RIGHTS

         Section 1.1.      REGISTRATION STATEMENTS.

         a. Filing of Registration Statement. The Company shall register for
resale all Conversion Shares issued or issuable to the Investor upon conversion
of the Preferred Stock. Subject to the terms and conditions of this Agreement,
the Company shall effect such registration in the manner provided below. The
Company shall file with the SEC on or before the end of a 385 calendar day
period immediately following the Closing Date, a registration statement (the
"Registration Statement") on such form promulgated by the SEC for which the
Company qualifies, that counsel for the Company shall deem appropriate and which
form shall be available for the sale of all Conversion Shares issued or issuable
pursuant to the terms of the Certificate of Designations and the Stock Purchase
Agreement, in accordance with the intended method of distribution of such
securities. The aggregate number of shares to be registered under the



<PAGE>   2



Registration Statement shall be equal to $5,000,000 divided by the Minimum
Conversion Price (as such term is defined in the Certificate of Designations).

         b. Effectiveness of the Registration Statement. The following
conditions for effectiveness shall apply to the Registration Statement required
to be filed by the Company with the SEC pursuant to paragraph (a) above, without
limiting the Company's obligation to file such Registration Statement. The
Company shall use its best efforts to have the Registration Statement declared
effective by the SEC in no event later than 14 calendar months after the Closing
Date. The Company shall ensure that the Registration Statement and any
amendments thereto remain in effect for a period ending on the date all
Registrable Securities issued or issuable to the Investor pursuant to the
Certificate of Designations and the Stock Purchase Agreement may be sold by the
Investor without registration and without any time, volume or manner limitations
pursuant to Rule 144(k) (or any similar provision then in effect) under the
Securities Act; provided that such period shall be extended one day for each day
after the applicable Effective Date that any Registration Statement covering
Registrable Securities is not effective during the period such Registration
Statement is required to be effective pursuant to this Agreement; and provided
further that the Company shall not be required to ensure that any Registration
Statement covering Registrable Securities remain in effect for such period if
the shares registered thereunder shall have become freely tradable pursuant to
Rule 144(k) of the Securities Act as such Rule may be amended from time to time,
or have otherwise been sold.

         c.       Failure to Obtain or Maintain Effectiveness of Registration
Statements.

                  (i)      In the event the Company fails for any reason to
obtain the effectiveness of the Registration Statement within the time period
set forth in Section 1.1(b) (a "Tardy Registration Statement"), or in the event
that the Company fails for any reason to maintain the effectiveness of the
Registration Statement (or the underlying prospectus) covering Registrable
Securities for the time period set forth in Section 1.1(b) (an "Ineffective
Registration Statement" together with a Tardy Registration Statement, a "Failed
Registration Statement"), (unless the Registrable Securities covered by such
Registration Statement shall have become freely tradable pursuant to Rule 144(k)
of the Securities Act or have been otherwise sold) then, in either event, an
amount equal to two percent (2.0%) of the aggregate purchase price of all of the
Registrable Securities covered by any such Failed Registration Statement then
held by the Investor for each calendar month and for each portion of a calendar
month, pro rata (the "Failed Registration Statement Fee"), during any period of
such ineffectiveness (an "Ineffective Period"), shall become due and payable to
Investor.

                  (ii)     If Failed Registration Statement Fees accrue with
respect to any Ineffective Registration Statement, payment of such Failed
Registration Statement Fees shall be made on the first Trading Day after the
earlier to occur of (1) the expiration of the applicable Ineffective Period and
(2) the last day of each calendar month during an Ineffective Period.

         d. Failure to Register Sufficient Number of Shares. If the number of
Conversion Shares included in the Registration Statement is insufficient to
permit the conversion in full of the Preferred Stock (such deficit in the number
of shares is referred to herein as the "Deficit



                                       2
<PAGE>   3



Shares"), then (i) the Company shall immediately amend such Registration
Statement (or file a new Registration Statement) to cover the Deficit Shares
(such amended or new Registration Statement is referred to herein as a "Deficit
Shares Registration Statement") and (ii) the Company shall pay to the Investor
in immediately available funds into an account designated by the Investor an
amount equal to 1.5% of the product of (x) the number of Deficit Shares
multiplied by (y) the Closing Bid Price (as such term is term is defined in the
Certificate of Designations) of the Common Stock on the applicable Effective
Date, for each calendar month and for each portion of a calendar month, pro
rata, during the period from the Effective Date of the applicable Registration
Statement to the Effective Date of the applicable Deficit Shares Registration
Statement.

         e. Liquidated Damages. The Company and the Investor hereby acknowledge
and agree that the sums payable under subsections 1.1(c) and 1.1(e) hereof shall
constitute liquidated damages and not penalties. The parties further acknowledge
that (i) the amount of loss or damages likely to be incurred is incapable or is
difficult to estimate precisely, (ii) the amounts specified in such subsections
bear a reasonable proportion and are not plainly or grossly disproportionate to
the probable loss likely to be incurred in connection with any failure by the
Company to obtain or maintain the effectiveness of the Registration Statement,
(iii) one of the reasons for the Company and the Investor reaching an agreement
as to such amounts was the uncertainty and cost of litigation regarding the
question of actual damages, and (iv) the Company and the Investor are
sophisticated business parties and have been represented by sophisticated and
able legal and financial counsel and negotiated this Agreement at arm's length.

         f. Piggyback Registrations. If, at any time prior to the Effective Date
of the Registration Statement filed pursuant to Section 1.1(a) of this
Agreement, the Company shall determine to register for sale with the SEC any of
its Common Stock or securities convertible into, or exchangeable or exercisable
for, shares of its Common Stock other than for resale by the Investor (a
"Piggyback Registration"), the Company shall give the Investor written notice
thereof (a "Notice of Piggyback Registration") 30 calendar days prior to the
filing of a registration statement relating to such Piggyback Registration,
which notice shall include a description of (i) the intended method of
distribution of such Common Stock and such other securities, (ii) the number of
shares of Common Stock and such other securities the Company intends to
register, and (iii) such other Persons who will or have a right to participate
in the Piggyback Registration. Upon the written request of the Investor made
within 20 days after receipt of a Notice of Piggyback Registration (which
request shall specify the Registrable Securities intended to be disposed of by
the Investor and the intended method of distribution thereof), the Company shall
include in the registration statement relating to such Piggyback Registration
all Registrable Securities that the Company has been so requested to register by
the Investor. If the Piggyback Registration for which the Company gives a Notice
of Piggyback Registration is a registered public offering involving an
underwriting, and the underwriters selected by the Company advise the Company in
writing that marketing factors require a limitation on the number of shares of
Common Stock or other securities to be underwritten, the Company shall reduce
the number of shares of Common Stock or other securities included in such
registration (1) first, by reducing the number of shares of Common Stock or
other securities to be registered for resale by all Persons other than the
Investor, allocated among such Persons in accordance with the priorities



                                       3
<PAGE>   4



then existing among the Company and such Persons and (2) second, by reducing the
number of shares of Registrable Securities requested to be included by the
Investor. Any other shares of Common Stock, Registrable Securities, or other
securities of the Company so excluded shall be withdrawn from and shall not be
included in such Piggyback Registration.

         g. Holdback Provisions. If, at any time after the Effective Date of the
Registration Statement filed pursuant to Section 1.1(a) of this Agreement, the
Company shall, in connection with either an underwritten or non-underwritten
public offering, determine to register for sale with the SEC any of its Common
Stock or securities convertible into, or exchangeable or exercisable for, shares
of its Common Stock other than for resale by the Investor (a "Post-Effective
Public Offering"):

                  (i)      the Company shall give the Investor written notice
thereof (a "Notice of Post-Effective Public Offering") at least 20 calendar
days' prior to the filing of a registration statement relating to such
Post-Effective Public Offering, which notice shall include a description of the
intended method of distribution of such Common Stock and other securities, the
number of shares of Common Stock and any other securities the Company intends to
register, and such other Persons who will, or have a right to, participate in
such Post-Effective Public Offering;

                  (ii)     if requested in writing by the Investor within 10
calendar days after receipt of a Notice of Post-Effective Public Offering, the
Company shall include, or if such Post-Effective Public Offering is an
underwritten offering of securities the Company shall use its best efforts to
cause the underwriters selected by the Company to include, in such
Post-Effective Public Offering such number of Registrable Securities requested
in writing by the Investor, and the Company will make any filings and amendments
or supplements to any registration statement necessary to effect the foregoing;

                  (iii)    if the underwriters selected by the Company advise
the Company in writing or the Company determines that marketing factors require
a limitation on the number of shares of Common Stock or any other securities to
be offered, the Company shall reduce the number of shares of Common Stock or any
other securities included in such registration (1) first, by reducing the number
of shares of Common Stock or any other securities to be registered for resale by
all Persons other than the Investor, allocated among such Persons in accordance
with the priorities then existing among the Company and such Persons and (2)
second, by reducing the number of shares of Registrable Securities requested to
be included by the Investor. Any other shares of Common Stock, Registrable
Securities, or other securities of the Company so excluded shall be withdrawn
from and shall not be included in such Post-Effective Public Offering.

                  (iv)     Upon receipt of a Notice of Post-Effective Public
Offering, the Investor agrees not to effect any public sale of the Conversion
Shares, other than through the proposed Post-Effective Public Offering, during
the 30 day period beginning on the effective date of the registration statement
relating to such Post-Effective Public Offering ("Holdback Period"), only if and
to the extent requested in writing by the underwriter or the Company;



                                       4
<PAGE>   5



provided that the foregoing shall not in any way limit the Investor's right to
sell any Registrable Securities prior to the effective date of such registration
statement; provided, further, that if the giving of a Notice of Post-Effective
Public Offering would cause the aggregate length of all Holdback Periods,
together with all Blackout Periods (defined below), in any twelve calendar month
period to exceed 120 calendar days, then the applicable Holdback Period shall be
shortened (but to no less than zero days) to avoid any such excess.

                                   ARTICLE II
                             REGISTRATION PROCEDURES

         Section 2.1.      FILINGS; INFORMATION. The Company will effect the
registration of the Registrable Securities in accordance with the intended
methods of disposition thereof as furnished to the Company by any proposed
seller of such Registrable Securities. Without limiting the foregoing, the
Company in each such case will do the following as expeditiously as possible,
but in no event later than the deadline, if any, prescribed therefor in this
Agreement:

                  a. The Company shall (i) prepare and file with the SEC the
Registration Statement covering the shares as described in subsection 1.1(a)
above; (ii) use its best efforts to cause such filed Registration Statement to
become and remain effective (pursuant to Rule 415 under the Securities Act or
otherwise) for the period prescribed by Section 1.1(b); (iii) prepare and file
with the SEC such amendments and supplements to the Registration Statement and
the prospectus used in connection therewith as may be necessary to keep the
Registration Statement effective for the time period prescribed by Section
1.1(b); and (iv) comply with the provisions of the Securities Act with respect
to the disposition of all securities covered by the Registration Statement
during such period in accordance with the intended methods of disposition by the
Investor set forth in the Registration Statement.

                  b. The Company shall file all necessary amendments to the
Registration Statement in order to effectuate the purpose of this Agreement, the
Stock Purchase Agreement and the Certificate of Designations.

                  c. Five Trading Days prior to filing the Registration
Statement or prospectus, or any amendment or supplement thereto (excluding
amendments deemed to result from the filing of documents incorporated by
reference therein), the Company shall deliver to the Investor and one firm of
counsel representing the Investor, in accordance with the notice provisions of
Section 4.8, copies of such Registration Statement as proposed to be filed,
together with exhibits thereto, which documents will be subject to review and
comment by the Investor and such counsel, and thereafter deliver to the Investor
and such counsel, in accordance with the notice provisions of Section 4.8, such
number of copies of such Registration Statement, each amendment and supplement
thereto (in each case including all exhibits thereto), the prospectus included
in such Registration Statement (including each preliminary prospectus) and such
other documents or information as the Investor or counsel reasonably may request
in order to facilitate the disposition of the Registrable Securities.



                                       5
<PAGE>   6



                  d. The Company shall deliver, in accordance with the notice
provisions of Section 4.8, to each broker as directed by the Investor such
number of conformed copies of such Registration Statement and of each amendment
and supplement thereto (in each case including all exhibits and documents
incorporated by reference), such number of copies of the prospectus contained in
such Registration Statement (including each preliminary prospectus and any
summary prospectus) and any other prospectus filed under Rule 424 promulgated
under the Securities Act relating to the Registrable Securities, and such other
documents, as may be reasonably requested to facilitate the disposition of the
Registrable Securities.

                  e. After the filing of each Registration Statement, the
Company shall promptly notify the Investor of any stop order issued or
threatened by the SEC in connection therewith and take all commercially
reasonable actions required to prevent the entry of such stop order or to remove
it if entered.

                  f. The Company shall use its best efforts to (i) register or
qualify the Registrable Securities under such other securities or blue sky laws
of such jurisdictions in the United States as the Investor reasonably (in light
of its intended plan of distribution) may request, and (ii) cause the
Registrable Securities to be registered with or approved by such other
governmental agencies or authorities in the United States as may be necessary by
virtue of the business and operations of the Company and do any and all other
acts and things that may be reasonably necessary or advisable to enable the
Investor to consummate the disposition of the Registrable Securities; provided,
however, that the Company will not be required to qualify generally to do
business in any jurisdiction where it would not otherwise be required to qualify
but for this paragraph (f), subject itself to taxation in any such jurisdiction,
or consent or subject itself to general service of process in any such
jurisdiction.

                  g. The Company shall immediately notify the Investor, but in
no event later than two (2) business days by facsimile and by overnight courier,
upon the occurrence of any of the following events in respect of the
Registration Statement or related prospectus in respect of an offering of
Registrable Securities: (i) receipt of any request for additional information by
the SEC or any other federal or state governmental authority during the period
of effectiveness of the Registration Statement for amendments or supplements to
the Registration Statement or related prospectus; (ii) the issuance by the SEC
or any other federal or state governmental authority of any stop order
suspending the effectiveness of the Registration Statement or the initiation of
any proceedings for that purpose; (iii) receipt of any notification with respect
to the suspension of the qualification or exemption from qualification of any of
the Registrable Securities for sale in any jurisdiction or the initiation or
threatening of any proceeding for such purpose; (iv) the happening of any event
that makes any statement made in such Registration Statement or related
prospectus or any document incorporated or deemed to be incorporated therein by
reference untrue in any material respect or that requires the making of any
changes in the Registration Statement, related prospectus or documents so that,
in the case of the Registration Statement, it will not contain any untrue
statement of a material fact or omit to state any material fact required to be
stated therein or necessary to make the statements therein not misleading, and
that in the case of the related prospectus, it will not contain any untrue
statement of a material fact or omit to state any material fact required to be
stated therein or necessary to make the statements



                                       6
<PAGE>   7


therein, in the light of the circumstances under which they were made, not
misleading; (v) the declaration by the SEC of the effectiveness of the
Registration Statement; and (vi) the Company's reasonable determination that a
post-effective amendment to the Registration Statement would be appropriate, and
the Company promptly shall make available to the Investor any such supplement or
amendment to the related prospectus.

                  h. The Company shall enter into customary agreements and take
such other actions as are reasonably required in order to expedite or facilitate
the disposition of such Registrable Securities (whereupon the Investor, at its
option, may require that any or all of the representations, warranties and
covenants of the Company also be made to and for the benefit of the Investor).

                  i. The Company shall make available to the Investor (and will
deliver to Investor's counsel), subject to restrictions imposed by the United
States government or any agency or instrumentality thereof, copies of all
correspondence between the SEC and the Company, concerning the Registration
Statement, and also will make available for inspection by the Investor and any
attorney, accountant or other professional retained by the Investor
(collectively, the "Inspectors"), all financial and other records, pertinent
corporate documents and properties of the Company (collectively, the "Records")
as shall be reasonably necessary to enable them to exercise their due diligence
responsibility, and cause the Company's officers and employees to supply all
information reasonably requested by any Inspectors in connection with any
Registration Statement. Records that the Company determines, in good faith, to
be confidential and that it notifies the Inspectors are confidential shall not
be disclosed by the Inspectors unless (i) the disclosure of such Records is
necessary to avoid or correct a misstatement or omission in any Registration
Statement or (ii) the disclosure or release of such Records is requested or
required pursuant to oral questions, interrogatories, requests for information
or documents or a subpoena or other order from a court of competent jurisdiction
or other process; provided, however, that prior to any disclosure or release
pursuant to clause (ii), the Inspectors shall provide the Company with prompt
notice of any such request or requirement so that the Company may seek an
appropriate protective order or waive such Inspectors' obligation not to
disclose such Records; and, provided, further, that if failing the entry of a
protective order or the waiver by the Company permitting the disclosure or
release of such Records, the Inspectors, upon advice of counsel, are compelled
to disclose such Records, the Inspectors may disclose that portion of the
Records that counsel has advised the Inspectors that the Inspectors are
compelled to disclose. The Investor agrees that information obtained by it
solely as a result of such inspections (not including any information obtained
from a third party who, insofar as is known to the Investor after reasonable
inquiry, is not prohibited from providing such information by a contractual,
legal or fiduciary obligation to the Company) shall be deemed confidential and,
if material non-public information, the Investor shall not while in possession
of such information engage in market transactions in the securities of the
Company or its Affiliates unless and until such information is made generally
available to the public. The Investor further agrees that, upon learning that
disclosure of such Records is sought in a court of competent jurisdiction, it
will give notice to the Company and allow the Company, at its expense, to
undertake appropriate action to prevent disclosure of the Records deemed
confidential.



                                       7
<PAGE>   8


                  j. To the extent required by law or reasonably necessary to
effect a sale of Registrable Securities in accordance with prevailing business
practices at the time of any sale of Registrable Securities pursuant to the
Registration Statement, the Company shall deliver to the Investor a signed
counterpart, addressed to the Investor, of (1) an opinion or opinions of counsel
to the Company and (2) a comfort letter or comfort letters from the Company's
independent public accountants, each in customary form and covering such matters
of the type customarily covered by opinions of comfort letters, as the case may
be, as the Investor therefor reasonably requests.

                  k. The Company otherwise shall comply with all applicable
rules and regulations of the SEC, including, without limitation, compliance with
applicable reporting requirements under the Exchange Act.

                  l. The Company shall appoint a transfer agent and registrar
for all of the class that includes the Registrable Securities covered by the
Registration Statement not later than the Effective Date of the Registration
Statement.

                  m. The Company may require the Investor to furnish promptly in
writing to the Company such information as may be legally required in connection
with any registration including, without limitation, all such information as may
be requested by the SEC or the National Association of Securities Dealers, Inc.
(the "NASD"). The Investor agrees to provide such information requested in
connection with any registration within ten Trading Days after receiving such
written request, and the Company shall not be responsible for any delays in
obtaining or maintaining the effectiveness of a Registration Statement caused by
the Investor's failure to timely provide such information. Each seller of
Registrable Securities shall notify the Company as promptly as practicable of
any inaccuracy or change in information previously furnished by such seller to
the Company or of the occurrence of any event, in either case as a result of
which any prospectus relating to the Registrable Securities contains or would
contain an untrue statement of a material fact regarding such seller or its
intended method of disposition of such Registrable Securities or omits to state
any material fact regarding such seller or such seller's intended method of
disposition of such Registrable Securities required to be stated therein or
necessary to make the statements therein, in the light of the circumstances
under which they were made, not misleading, and promptly furnish to the Company
any additional information required to correct and update any previously
furnished information or required so that such prospectus shall not contain,
with respect to such seller or the disposition of such Registrable Securities,
an untrue statement of a material fact or omit to state a material fact required
to be stated therein or necessary to make the statements therein, in the light
of the circumstances under which they were made, not misleading.

         Section 2.2.      REGISTRATION EXPENSES.

                  a. In connection with the Registration Statement, the Company
shall pay all registration expenses incurred in connection with the registration
thereunder (the "Registration Expenses"), including, without limitation: (i) all
registration, filing, securities exchange listing and fees required by the NASD,
(ii) all registration, filing, qualification and other fees and



                                       8
<PAGE>   9


expenses of compliance with securities or blue sky laws (including reasonable
fees and disbursements of its counsel in connection with blue sky qualifications
of the Registrable Securities required hereby), (iii) all of the Company's word
processing, duplicating, printing, messenger and delivery expenses, (iv) the
Company's internal expenses (including, without limitation, all salaries and
expenses of its officers and employees performing legal or accounting duties),
(v) the fees and expenses incurred by the Company in connection with the listing
of the Registrable Securities, (vi) reasonable fees and disbursements of counsel
for the Company and the Investor, and customary fees and expenses for
independent certified public accountants retained by the Company (including the
expenses of any special audits or comfort letters or costs associated with the
delivery by independent certified public accountants of such special audit(s) or
comfort letter(s) requested pursuant to Section 2.1(j) hereof), (vii) the fees
and expenses of any special experts retained by the Company in connection with
such registration, (viii) premiums and other costs of policies of insurance
purchased at the discretion of the Company against liabilities arising out of
any public offering of the Registrable Securities being registered, and (ix) any
fees and disbursements of underwriters customarily paid by issuers or sellers of
securities, but such registration expenses shall specifically exclude
underwriting fees, discounts, transfer taxes or commissions, if any,
attributable to the sale of Registrable Securities, which shall be payable by
each holder of Registrable Securities pro rata on the basis of the number of
Registrable Securities of each such holder that are included in a registration
under this Agreement.

                  b. In addition, the Company shall pay all reasonable fees and
expenses of counsel for the Investor incurred in connection with the review of
and assistance in preparation of the Registration Statement, unless a greater
amount is required due to the nature of the review performed by Investor's
counsel or the extent of assistance provided by Investor's counsel (an estimate
of such greater fees and expenses of such firm of counsel to the Investor shall
be provided to the Company prior to the undertaking of such counsel's additional
review or assistance) provided that such fees shall be applied toward the
$50,000 maximum set forth in Section 10.1(b) of the Stock Purchase Agreement.

         Section 2.3.      BLACKOUT PERIOD. Upon receipt of a written notice
from the Company stating that an event of the kind described in Section
2.1(g)(iv) has occurred and the number of calendar days following the date of
the notice on or before which the Company shall deliver a supplemented or
amended prospectus contemplated by Section 2.1(g)(iv) (such number of days set
forth in such notice, the "Delivery Period"), the Investor shall discontinue the
Investor's offer of the Registrable Securities pursuant to the Registration
Statement relating to such Registrable Securities until the Investor shall have
received copies of the supplemented or amended prospectus contemplated by
Section 2.1(g)(iv) (the number of calendar days from and including the date of
delivery of such notice until delivery of such prospectuses, the "Blackout
Period") and, if so directed by the Company, will deliver to the Company (at the
Company's expense) all copies other than permanent file copies then in the
Investor's possession of the prospectus relating to such Registrable Securities
at the time of receipt of such notice. The Company may not deliver more than two
such notices during any twelve calendar month period. The Company shall set the
length of each Delivery Period such that the following sum shall not exceed 120
calendar days: (x) the number of days in all prior Blackout Periods in the
twelve



                                       9
<PAGE>   10


calendar month period ending on the last day of such proposed Delivery Period,
plus (y) the number of days in all Holdback Periods in the twelve calendar month
period ending on the last day of such proposed Delivery Period, plus (z) the
number of days in such proposed Delivery Period. If the Company shall fail to
deliver a supplemented or amended prospectus contemplated by Section 2.1(g)(iv)
before the expiration of the applicable Delivery Period, the Company shall pay
to the Investor an amount equal to two percent (2.0%) per calendar month (pro
rated for portions thereof) of the aggregate purchase price of all Registrable
Securities beginning on the first day following expiration of the applicable
Delivery Period and ending on the expiration date of the applicable Blackout
Period (the "Blackout Fee"). The Company shall pay Blackout Fees on the first
Trading Day after the earlier to occur of (1) the expiration of the applicable
Blackout Period and (2) the last day of each calendar month during a Blackout
Period. In the event that the Investor uses a prospectus in connection with the
offering and sale of any of the Registrable Securities covered by such
prospectus, the Investor will use only the latest version of such prospectus
provided by the Company to the Investor.

                                   ARTICLE III
                        INDEMNIFICATION AND CONTRIBUTION

         Section 3.1.      INDEMNIFICATION BY THE COMPANY.

                  a. The Company agrees to indemnify and hold harmless the
Investor, its partners, Affiliates, officers, directors, employees and duly
authorized agents, and each Person or entity, if any, who controls the Investor
within the meaning of Section 15 of the Securities Act or Section 20 of the
Exchange Act, together with the partners, Affiliates, officers, directors,
employees and duly authorized agents of such controlling Person or entity
(collectively, the "Investor Controlling Persons"), from and against any and all
losses, claims, damages, liabilities, costs and expenses (including, without
limitation, any and all reasonable attorneys' fees and disbursements and costs
and expenses of investigating and defending any such claim and any and all
amounts paid in settlement of, any action, suit or proceeding between any of the
indemnified parties and any indemnifying parties or between any indemnified
party and any third party, or otherwise, or any claim asserted) (collectively,
"Damages"), joint or several, and any action or proceeding in respect thereof to
which the Investor, its partners, Affiliates, officers, directors, employees and
duly authorized agents, and any Investor Controlling Person, becomes subject to
under the Securities Act, the Exchange Act or other federal or state statutory
law or regulation, at common law or otherwise, as and when incurred, insofar as
such Damages (or actions or proceedings in respect thereof) (i) arise out of, or
are based upon, any untrue statement or alleged untrue statement of a material
fact contained in any Registration Statement, or in any preliminary prospectus,
final prospectus, summary prospectus, documents filed under the Exchange Act and
deemed to be incorporated by reference into any Registration Statement,
application or other document executed by or on behalf of the Company or based
on written information furnished by or on behalf of the Company filed in any
jurisdiction in order to qualify the Registerable Securities under the
securities or blue sky laws thereof or filed with the SEC, amendment or
supplement relating to the Registerable Securities or (ii) arise out of, or are
based upon, any omission or alleged omission to state therein a material fact
required to be stated therein or necessary to make the statements therein not
misleading, and shall reimburse the Investor, its



                                       10
<PAGE>   11

partners, Affiliates, officers, directors, employees and duly authorized agents,
and each such Investor Controlling Person, for any legal and other expenses
reasonably incurred by the Investor, its partners, Affiliates, officers,
directors, employees and duly authorized agents, or any such Investor
Controlling Person, as incurred, in investigating or defending or preparing to
defend against any such Damages or actions or proceedings; provided, however,
that the Company shall not be liable to the extent that any such Damages arise
out of the Investor's failure to send or give a copy of the final prospectus or
supplement at or prior to the written confirmation of the sale of Registerable
Securities to the persons asserting an untrue statement or alleged untrue
statement or omission or alleged omission at or prior to the written
confirmation of the sale of Registrable Securities to such person if such
statement or omission was corrected in such final prospectus or supplement, and
provided that the Investor had been obligated under applicable law to deliver
such final prospectus or supplement to such person; provided, further, that the
Company shall not be liable to the extent that any such Damages arise out of or
are based upon an untrue statement or alleged untrue statement or omission or
alleged omission made in such Registration Statement, or any such preliminary
prospectus, final prospectus, summary prospectus, amendment or supplement in
reliance upon and in conformity with written information furnished to the
Company by the Investor or any other person who participates as a seller or as
an underwriter in the offering or sale of such securities, in either case, in
any questionnaire or other request by the Company, or otherwise specifically
stating that it is for use in the preparation thereof, provided that such
written information furnished to the Company by the Investor, or any other
person who participates as a seller or as an underwriter in the offering or sale
of such securities, is not materially altered by the Company.

                  b. The Investor agrees to indemnify and hold harmless the
Company, its Affiliates, officers, directors, employees, and duly authorized
agents, and each Person or entity, if any, who controls the Company within the
meaning of Section 15 of the Securities Act or Section 20 of the Exchange Act,
together with the Affiliates, officers, directors, employees and duly authorized
agents of such controlling Person or entity (collectively, the "Company
Controlling Persons") from and against any Damages, joint or several, and any
action in respect thereof to which the Company, its Affiliates, officers,
directors, employees, and duly authorized agents, and any Company Controlling
Person becomes subject to under the Securities Act, the Exchange Act or other
federal or state statutory law or regulation, at common law or otherwise, as and
when incurred, insofar as such Damages (or actions or proceedings in respect
thereof) arise out of an untrue statement or alleged untrue statement or
omission or alleged omission made in a Registration Statement, or any
preliminary prospectus, final prospectus, summary prospectus, amendment or
supplement in reliance upon and in conformity with written information furnished
to the Company by the Investor in any questionnaire or other request by the
Company, or otherwise specifically stating that it is for use in the preparation
thereof; provided, however, that such written information furnished to the
Company by the Investor is not materially altered by the Company.
Notwithstanding the foregoing, the Investor shall in no event be required to
indemnify the Company for any amount in excess of the amount by which the total
price at which the Registrable Securities of the Investor were sold to the
public (less underwriting discounts and commissions) exceeds the amount actually
paid by the Investor under the Stock Purchase Agreement for such Registrable
Securities sold to the public.



                                       11
<PAGE>   12

                  c. All claims for indemnification shall be asserted and
resolved as set forth in Section 9.2 of the Stock Purchase Agreement, except
that for the purposes of claims for indemnification pursuant to this Agreement
the last sentence of Section 9.2(a)(i) of the Stock Purchase Agreement shall
read as follows: "Notwithstanding the foregoing, the Indemnified Party may take
over the control of the defense or settlement of a Third Party Claim at any time
if it irrevocably waives its right to indemnity under Section 9.1 of this
Agreement and contribution under Section 3.4 of the Registration Rights
Agreement with respect to such Third Party Claim."

         Section 3.2.      ARBITRATION. Any controversy, claim or dispute
arising out of or in connection with this Agreement, including any question
regarding its existence, validity, interpretation, breach, or termination, shall
be referred to and finally resolved in accordance with Section 9.3 of the Stock
Purchase Agreement.

         Section 3.3.      OTHER INDEMNIFICATION. Indemnification similar to
that specified in the preceding paragraphs of this Article III (with appropriate
modifications) shall be given by the Company with respect to any required
registration or other qualification of securities under any federal or state law
or regulation of any governmental authority other than the Securities Act. The
provisions of this Article III shall be in addition to any other rights to
indemnification, contribution or other remedies which an Indemnified Party may
have pursuant to law, equity, contract or otherwise.

         Section 3.4.      CONTRIBUTION. If the indemnification and
reimbursement obligations provided for in any section of this Article III is
unavailable or insufficient to hold harmless the Indemnified Parties in respect
of any Damages referred to herein, then the Indemnifying Party, in lieu of
indemnifying such Indemnified Party, shall contribute to the amount paid or
payable by such Indemnified Party as a result of such Damages as between the
Company on the one hand and the Investor or seller on the other, in such
proportion as is appropriate to reflect the relative fault of the Company and of
the Investor or seller in connection with such statements or omissions, as well
as other equitable considerations. The relative fault of the Company on the one
hand and of the Investor or seller on the other shall be determined by reference
to, among other things, whether the untrue or alleged untrue statement of a
material fact or the omission or alleged omission to state a material fact
relates to information supplied by such party, and the parties' relative intent,
knowledge, access to information and opportunity to correct or prevent such
statement or omission.

         The Company and the Investor agree that it would not be just and
equitable if contribution pursuant to this Section 3.4 were determined by pro
rata allocation or by any other method of allocation that does not take account
of the equitable considerations referred to in the immediately preceding
paragraph. The amount paid or payable by an Indemnified Party as a result of the
Damages referred to in the immediately preceding paragraph shall be deemed to
include, subject to the limitations set forth above, any legal or other expenses
reasonably incurred by such Indemnified Party in connection with investigating
or defending any such action or claim. Notwithstanding the provisions of this
Section 3.4, the Investor or seller shall in no event be required to contribute
any amount in excess of the amount by which the total price at which the
Registrable Securities of the Investor were sold to the public (less
underwriting



                                       12
<PAGE>   13

discounts and commissions) and less the amount actually paid by the Investor
under the Stock Purchase Agreement for such Registrable Securities sold to the
public exceeds the amount of any damages which the Investor has otherwise been
required to pay by reason of such untrue or alleged untrue statement or omission
or alleged omission. No Person guilty of fraudulent misrepresentation (within
the meaning of Section 11(f) of the Securities Act) shall be entitled to
contribution from any Person who was not guilty of such fraudulent
misrepresentation.

                                   ARTICLE IV
                                  MISCELLANEOUS

         Section 4.1.      OUTSTANDING REGISTRATION RIGHTS. The Company
represents and warrants to the Investor that, except as set forth on Schedule
4.1 included in the Company Disclosure Letter attached hereto, there is not in
effect on the date hereof any agreement by the Company pursuant to which any
holders of securities of the Company have a right to cause the Company to
register or qualify such securities under the Securities Act or any securities
or blue sky laws of any jurisdiction. The Company hereby covenants and agrees
that until 60 calendar days after the Registration Statement has been declared
effective by the SEC it will not, without the prior written consent of the
Investor, enter into or amend any agreement by the Company pursuant to which any
holders of securities of the Company have a right to cause the Company to
register or qualify securities under the Securities Act or any securities or
blue sky laws of any jurisdiction; provided, however, that the foregoing shall
not apply to (i) a Sale to a Third Party (as such terms are defined in the Stock
Purchase Agreement) for which the Investor has elected not to exercise its right
of first refusal pursuant to Section 6.12 of the Stock Purchase Agreement or
(ii) in connection with an acquisition of another entity or assets related to
the Company's current or future business.

         Section 4.2.      TERM. The registration rights provided to the holders
of Registrable Securities hereunder shall terminate at such time as all
Registrable Securities have been issued and have ceased to be Registrable
Securities. Notwithstanding the foregoing, paragraph (c) of Section 1.1, Article
III, Section 4.8, and Section 4.9 shall survive the termination of this
Agreement.

         Section 4.3.      RULE 144. If the Company is required to file reports
under the Exchange Act, the Company will file in a timely manner, information,
documents and reports in compliance with the Securities Act and the Exchange Act
and, at its expense, promptly will take such further action as holders of
Registrable Securities reasonably may request to enable such holders of
Registrable Securities to sell Registrable Securities without registration under
the Securities Act within the limitation of the exemptions provided by (a) Rule
144 under the Securities Act ("Rule 144"), as such Rule may be amended from time
to time, or (b) any similar rule or regulation hereafter adopted by the SEC. If
at any time the Company is not required to file such reports, it will, at its
expense, forthwith upon the written request of any holder of Registrable
Securities who intends to make a sale under Rule 144, make available adequate
current public information with respect to the Company within the meaning of
paragraph (c)(2)



                                       13
<PAGE>   14

of Rule 144 or such other information as necessary to permit sales pursuant to
Rule 144. Upon the request of the Investor, the Company will deliver to the
Investor a written statement, signed by the Company's principal financial
officer, as to whether it has complied with such requirements. This Section 4.3
shall terminate at the same time as the registration rights as provided in
Section 4.2.

         Section 4.4.      CERTIFICATE. The Company will, at its expense,
promptly upon the request of any holder of Registrable Securities, deliver to
such holder a certificate, signed by the Company's principal financial officer,
stating (a) the Company's name, address and telephone number (including area
code), (b) the Company's Internal Revenue Service identification number, (c) the
Company's SEC file number, (d) the number of shares of each class of stock
outstanding as shown by the most recent report or statement published by the
Company, and (e) whether the Company has filed the reports required to be filed
under the Exchange Act for a period of at least ninety (90) days prior to the
date of such certificate and in addition has filed the most recent annual report
required to be filed thereunder.

         Section 4.5.      AMENDMENT AND MODIFICATION. Any provision of this
Agreement may be waived, provided that such waiver is set forth in a writing
executed by both parties to this Agreement. The provisions of this Agreement,
including the provisions of this sentence, may not be amended, modified or
supplemented, and waivers or consents to departures from the provisions hereof
may not be given, unless the Company has obtained the written consent of the
holders of a majority of the then outstanding Registrable Securities.
Notwithstanding the foregoing, the waiver of any provision hereof with respect
to a matter that relates exclusively to the rights of holders of Registrable
Securities whose securities are being sold pursuant to a Registration Statement
and does not directly or indirectly affect the rights of other holders of
Registrable Securities may be given by holders of at least a majority of the
Registrable Securities being sold by such holders; provided that the provisions
of this sentence may not be amended, modified or supplemented except in
accordance with the provisions of the immediately preceding sentence. No course
of dealing between or among any Person having any interest in this Agreement
will be deemed effective to modify, amend or discharge any part of this
Agreement or any rights or obligations of any person under or by reason of this
Agreement.

         Section 4.6.      SUCCESSORS AND ASSIGNS; ENTIRE AGREEMENT. This
Agreement and all of the provisions hereof shall be binding upon and inure to
the benefit of the parties hereto and their respective successors and assigns.
The Investor may assign its rights under this Agreement to any subsequent holder
of the Registrable Securities, provided that the Company shall have the right to
require any holder of Registrable Securities to execute a counterpart of this
Agreement and agree to be bound by the provisions of this Agreement as a
condition to such holder's claim to any rights hereunder. This Agreement,
together with the Stock Purchase Agreement, the Certificate of Amendment and the
exhibits and schedules to such agreements together set forth the entire
agreement and understanding between the parties as to the subject matter hereof
and merges and supersedes all prior discussions, agreements and understandings
of any and every nature among them.



                                       14
<PAGE>   15

         Section 4.7.      SEVERABILITY. In the event that any provision of this
Agreement or the application of any provision hereof is declared to be illegal,
invalid or otherwise unenforceable by a court of competent jurisdiction, the
remainder of this Agreement shall not be affected except to the extent necessary
to delete such illegal, invalid or unenforceable provision unless that provision
held invalid shall substantially impair the benefits of the remaining portions
of this Agreement.

         Section 4.8.      NOTICES. All notices, demands, requests, consents,
approvals, and other communications required or permitted hereunder shall be in
writing and shall be (i) deposited in the mail, registered or certified, return
receipt requested, postage prepaid, (ii) delivered by reputable air courier
service with charges prepaid, or (iii) transmitted by hand delivery, telegram or
facsimile, addressed as set forth below or to such other address as such party
shall have specified most recently by written notice. Any notice or other
communication required or permitted to be given hereunder shall be deemed
effective (a) upon hand delivery or delivery by facsimile, with accurate
confirmation generated by the transmitting facsimile machine, at the address or
number designated below (if delivered on a business day during normal business
hours where such notice is to be received), or the first business day following
such delivery (if delivered other than on a business day during normal business
hours where such notice is to be received) or (b) on the third business day
following the date of mailing by express courier service, fully prepaid,
addressed to such address, or upon actual receipt of such mailing, whichever
shall first occur. The addresses and facsimile numbers for such communications
shall be:

         If to the Company:

                                    PracticeWorks, Inc.
                                    1765 The Exchange, Suite 300
                                    Attention: Richard E. Perlman
                                    Telephone: (770) 850-5006
                                    Facsimile: (770) 857-1300

         with a copy (which shall not constitute notice) to:

                                    King & Spalding
                                    191 Peachtree Street
                                    Atlanta, GA 30303
                                    Attention: John J. Kelley III
                                    Telephone: (404) 572-4600
                                    Facsimile: (404) 572-5100



                                       15
<PAGE>   16

         if to the Investor:

                                    Crescent International Ltd.
                                    c/o GreenLight (Switzerland) SA
                                    84, av Louis-Casai
                                    1216 Geneva, Cointrin
                                    Switzerland
                                    Attention: Mel Craw/Maxi Brezzi
                                    Telephone: +41 22 791 71 69
                                    Facsimile: +41 22 929 53 94

         with a copy (which shall not constitute notice) to:

                                    Clifford Chance Rogers & Wells LLP
                                    200 Park Avenue
                                    New York, NY 10166
                                    Attention: Earl S. Zimmerman, Esq.
                                    Telephone: (212) 878-8000
                                    Facsimile: (212) 878-8375

     Either party hereto may from time to time change its address or facsimile
     number for notices under this Section 4.8 by giving at least 10 days' prior
     written notice of such changed address or facsimile number to the other
     party hereto.

         Section 4.9.      GOVERNING LAW. This Agreement shall be construed
under the laws of the State of New York.

         Section 4.10.     HEADINGS. The headings in this Agreement are for
convenience of reference only and shall not constitute a part of this Agreement,
nor shall they affect their meaning, construction or effect.

         Section 4.11.     COUNTERPARTS. This Agreement may be executed in
multiple counterparts, each of which shall be deemed to be an original
instrument and all of which together shall constitute one and the same
instrument.

         Section 4.12.     FURTHER ASSURANCES. Each party shall cooperate and
take such action as may be reasonably requested by another party in order to
carry out the provisions and purposes of this Agreement and the transactions
contemplated hereby.

         Section 4.13.     ABSENCE OF PRESUMPTION. This Agreement shall be
construed without regard to any presumption or rule requiring construction or
interpretation against the party drafting or causing any instrument to be
drafted.

         Section 4.14.     REMEDIES. In the event of a breach or a threatened
breach by any party to this Agreement of its obligations under this Agreement,
any party injured or to be injured by such breach will be entitled to specific
performance of its rights under this Agreement or to injunctive relief, in
addition to being entitled to exercise all rights provided in this Agreement



                                       16
<PAGE>   17

and granted by law. The parties agree that the provisions of this Agreement
shall be specifically enforceable, it being agreed by the parties that the
remedy at law, including monetary damages, for breach of any such provision may
be inadequate compensation for any loss.



                                       17
<PAGE>   18

         IN WITNESS WHEREOF, the parties hereto have caused this Registration
Rights Agreement to be executed by the undersigned, thereunto duly authorized,
as of the date first set forth above.

                      CRESCENT INTERNATIONAL LTD.


                      By:
                         -------------------------------------------------------
                          GreenLight (Switzerland) S.A. as Investor's manager
                          Name:
                          Title:

                      PRACTICEWORKS, INC.


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



                                       18