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                                                                   EXHIBIT 10.48

                                                                     EXHIBIT B-2

NEITHER THIS WARRANT NOR THE SHARES ISSUABLE UPON EXERCISE HEREOF HAVE BEEN
REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE "SECURITIES ACT")
OR ANY OTHER APPLICABLE SECURITIES LAWS IN RELIANCE UPON AN EXEMPTION FROM THE
REGISTRATION REQUIREMENTS OF THE SECURITIES ACT AND SUCH OTHER SECURITIES LAWS.
NEITHER THIS WARRANT NOR THE SHARES ISSUABLE UPON EXERCISE HEREOF MAY BE SOLD,
PLEDGED, TRANSFERRED, ENCUMBERED OR OTHERWISE DISPOSED OF EXCEPT PURSUANT TO AN
EFFECTIVE REGISTRATION STATEMENT UNDER THE SECURITIES ACT OR IN A TRANSACTION
WHICH IS EXEMPT FROM REGISTRATION UNDER THE PROVISIONS OF THE SECURITIES ACT.

                             STOCK PURCHASE WARRANT

                  To Purchase XX,000 Shares of Common Stock of

                     DENTAL/MEDICAL DIAGNOSTIC SYSTEMS, INC.

            THIS CERTIFIES that, for value received, ____________________ (the
"Holder"), is entitled, upon the terms and subject to the conditions hereinafter
set forth, at any time on or after February 29, 2000 (the "Initial Exercise
Date") and on or prior to the close of business on November 30, 2000 (the
"Termination Date") but not thereafter, to subscribe for and purchase from
Dental/Medical Diagnostic Systems, Inc., a corporation incorporated in Delaware
(the "Company"), up to XX Thousand (XX,000) shares (the "Warrant Shares") of
Common Stock, $.01 par value, of the Company (the "Common Stock"). The purchase
price of one share of Common Stock (the "Exercise Price") under this Warrant
shall be $3.50. The Exercise Price and the number of shares for which the
Warrant is exercisable shall be subject to adjustment as provided herein. In the
event of any conflict between the terms of this Warrant and the Exchangeable
Preferred Stock and Warrants Purchase Agreement dated as of February 24, 2000
pursuant to which this Warrant has been issued (the "Purchase Agreement") the
Purchase Agreement shall control. Capitalized terms used and not otherwise
defined herein shall have the meanings set forth for such terms in the Purchase
Agreement.

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            1. Title to Warrant. Prior to the Termination Date and subject to
compliance with applicable laws and the terms of this Warrant, this Warrant and
all rights hereunder are transferable, in whole or in part, at the office or
agency of the Company by the holder hereof in person or by duly authorized
attorney, upon surrender of this Warrant together with the Assignment Form
annexed hereto properly endorsed.

            2. Authorization of Shares. The Company covenants that all shares of
Common Stock which may be issued upon the exercise of rights represented by this
Warrant will, upon exercise of the rights represented by this Warrant, be duly
authorized, validly issued, fully paid and nonassessable and free from all
taxes, liens and charges in respect of the issue thereof (other than taxes in
respect of any transfer occurring contemporaneously with such issue).

            3. Exercise of Warrant. Except as provided in Section 4 herein,
exercise of the purchase rights represented by this Warrant may be made at any
time or times on or after the Initial Exercise Date, and before the close of
business on the Termination Date by the surrender of this Warrant and the Notice
of Exercise Form annexed hereto duly executed, at the office of the Company (or
such other office or agency of the Company as it may designate by notice in
writing to the registered holder hereof at the address of such holder appearing
on the books of the Company) and upon payment of the Exercise Price of the
shares thereby purchased by wire transfer or cashier's check drawn on a United
States bank, the holder of this Warrant shall be entitled to receive a
certificate for the number of shares of Common Stock so purchased. Certificates
for shares purchased hereunder shall be delivered to the holder hereof within
five (5) Trading Days after the date on which this Warrant shall have been
exercised as aforesaid. This Warrant shall be deemed to have been exercised and
such certificate or certificates shall be deemed to have been issued, and Holder
or any other person so designated to be named therein shall be deemed to have
become a holder of record of such shares for all purposes, as of the date the
Holder faxes a Notice of Exercise to the Company, provided that such fax notice
is followed by delivery of the original notice and payment to the Company of the
Exercise Price and all taxes required to be paid by Holder, if any, pursuant to
Section 5 prior to the issuance of such shares, have been paid within three (3)
Trading Days of such fax notice. If this Warrant shall have been exercised in
part, the Company shall, at the time of delivery of the certificate or
certificates representing Warrant Shares, deliver to Holder a new Warrant
evidencing the rights of Holder to purchase the unpurchased shares of Common
Stock called for by this Warrant, which new Warrant shall in all other respects
be identical with this Warrant. If there is no registration in effect permitting
the resale by the Holder of the Warrant Shares at any time from and after
September 30, 2000, then the Holder shall have the right to a "cashless
exercise" in which the Holder shall be entitled to receive a certificate for the
number of shares equal to the quotient obtained by dividing [(A-B) (X)] by (A),
where:

(A) = the average of the high and low trading prices per share of Common Stock
on the Trading Day preceding the date of such election;

(B) = the Exercise Price of the Warrant; and

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(X) = the number of shares issuable upon exercise of the Warrant in accordance
with the terms of this Warrant.

            4. No Fractional Shares or Scrip. No fractional shares or scrip
representing fractional shares shall be issued upon the exercise of this
Warrant. As to any fraction of a share which Holder would otherwise be entitled
to purchase upon such exercise, the Company shall pay a cash adjustment in
respect of such final fraction in an amount equal to the Exercise Price.

            5. Charges, Taxes and Expenses. Issuance of certificates for shares
of Common Stock upon the exercise of this Warrant shall be made without charge
to the holder hereof for any issue or federal or state transfer tax or other
incidental expense in respect of the issuance of such certificate, all of which
taxes and expenses shall be paid by the Company, and such certificates shall be
issued in the name of the holder of this Warrant or in such name or names as may
be directed by the holder of this Warrant; provided, however, that in the event
certificates for shares of Common Stock are to be issued in a name other than
the name of the holder of this Warrant, this Warrant when surrendered for
exercise shall be accompanied by the Assignment Form attached hereto duly
executed by the holder hereof; and the Company may require, as a condition
thereto, the payment of a sum sufficient to reimburse it for any transfer tax
incidental thereto.

            6. Closing of Books. The Company will not close its shareholder
books or records in any manner which prevents the timely exercise of this
Warrant.

            7. Transfer, Division and Combination. (a) the Holder (and its
transferees and assigns), by acceptance of this Warrant, covenants and agrees
that it is acquiring the Warrants evidenced hereby, and, upon exercise hereof,
the Warrant Shares, for its own account as an investment and not with a view to
distribution thereof. The Warrant Shares have not been registered under the
Securities Act or any state securities laws and no transfer of any Warrant
Shares shall be permitted unless the Company has received notice of such
transfer, at the address of its principal office set forth in the Purchase
Agreement, in the form of assignment attached hereto, accompanied by an opinion
of counsel reasonably satisfactory to the Company that an exemption from
registration of such Warrants or Warrant Shares under the Securities Act is
available for such transfer, except that no such opinion shall be required after
the registration for resale by the Holder of the Warrant Shares, as contemplated
by the Registration Rights Agreement. Upon any exercise of the Warrants,
certificates representing the Warrant Shares shall bear a restrictive legend
substantially identical to that set forth on the face of this Warrant
certificate. Any purported transfer of any Warrant or Warrant Shares not in
compliance with the provisions of this section shall be null and void.

                (b) This Warrant may be divided or combined with other Warrants
upon presentation hereof at the aforesaid office of the Company, together with a
written notice specifying the names and denominations in which new Warrants are
to be issued, signed by Holder or its agent or attorney. Subject to compliance
with Section 7(a), as to any transfer which may be involved in such division or
combination, the Company shall execute and deliver a new Warrant or Warrants in
exchange for the Warrant or Warrants to be divided or combined in accordance
with such notice.

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                (c) The Company shall prepare, issue and deliver at its own
expense (other than transfer taxes) the new Warrant or Warrants under this
Section 7.

                (d) The Company agrees to maintain, at its aforesaid office,
books for the registration and the registration of transfer of the Warrants.

            8. No Rights as Shareholder until Exercise. This Warrant does not
entitle the holder hereof to any voting rights or other rights as a shareholder
of the Company prior to the exercise hereof. Upon the surrender of this Warrant
and the payment of the aggregate Exercise Price, the Warrant Shares so purchased
shall be and be deemed to be issued to such holder as the record owner of such
shares as of the close of business on the later of the date of such surrender or
payment.

            9. Loss, Theft, Destruction or Mutilation of Warrant. The Company
covenants that upon receipt by the Company of evidence reasonably satisfactory
to it of the loss, theft, destruction or mutilation of this Warrant certificate
or any stock certificate relating to the Warrant Shares, and in case of loss,
theft or destruction, of indemnity or security reasonably satisfactory to it
(which shall not exceed that customarily charged by the Company's transfer
agent), and upon surrender and cancellation of such Warrant or stock
certificate, if mutilated, the Company will make and deliver a new Warrant or
stock certificate of like tenor and dated as of such cancellation, in lieu of
such Warrant or stock certificate.

            10. Saturdays, Sundays, Holidays, etc. If the last or appointed day
for the taking of any action or the expiration of any right required or granted
herein shall be a Saturday, Sunday or a legal holiday, then such action may be
taken or such right may be exercised on the next succeeding day not a Saturday,
Sunday or legal holiday.

            11. Adjustments of Exercise Price and Number of Warrant Shares. (a)
Stock Splits, etc. The number and kind of securities purchasable upon the
exercise of this Warrant and the Exercise Price shall be subject to adjustment
from time to time upon the happening of any of the following. In case the
Company shall (i) pay a dividend in shares of Common Stock or make a
distribution in shares of Common Stock to holders of its outstanding Common
Stock, (ii) subdivide its outstanding shares of Common Stock into a greater
number of shares of Common Stock, (iii) combine its outstanding shares of Common
Stock into a smaller number of shares of Common Stock or (iv) issue any shares
of its capital stock in a reclassification of the Common Stock, then the number
of Warrant Shares purchasable upon exercise of this Warrant immediately prior
thereto shall be adjusted so that the holder of this Warrant shall be entitled
to receive the kind and number of Warrant Shares or other securities of the
Company which he would have been entitled to receive had such Warrant been
exercised in advance thereof. Upon each such adjustment of the kind and number
of Warrant Shares or other securities of the Company which are purchasable
hereunder, the holder of this Warrant shall thereafter be entitled to purchase
the number of Warrant Shares or other securities resulting from such adjustment
at an Exercise Price per Warrant Share or other security obtained by multiplying
the Exercise Price in effect immediately prior to such adjustment by the number
of Warrant Shares purchasable pursuant hereto immediately prior to such
adjustment and dividing by the number of Warrant Shares or other securities of
the Company resulting from such adjustment. An adjustment made pursuant to this
paragraph shall become effective immediately after the effective date of such
event

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retroactive to the record date, if any, for such event.(b) Reorganization,
Reclassification, Merger, Consolidation or Disposition of Assets. In case the
Company shall reorganize its capital, reclassify its capital stock, consolidate
or merge with or into another corporation (where the Company is not the
surviving corporation or where there is a change in or distribution with respect
to the Common Stock of the Company), or sell, transfer or otherwise dispose of
all or substantially all its property, assets or business to another corporation
and, pursuant to the terms of such reorganization, reclassification, merger,
consolidation or disposition of assets, shares of common stock of the successor
or acquiring corporation, or any cash, shares of stock or other securities or
property of any nature whatsoever (including warrants or other subscription or
purchase rights) in addition to or in lieu of common stock of the successor or
acquiring corporation ("Other Property"), are to be received by or distributed
to the holders of Common Stock of the Company, then Holder shall have the right
thereafter to receive, upon exercise of this Warrant, the number of shares of
common stock of the successor or acquiring corporation or of the Company, if it
is the surviving corporation, and Other Property receivable upon or as a result
of such reorganization, reclassification, merger, consolidation or disposition
of assets by a holder of the number of shares of Common Stock for which this
Warrant is exercisable immediately prior to such event. In case of any such
reorganization, reclassification, merger, consolidation or disposition of
assets, the successor or acquiring corporation (if other than the Company) shall
expressly assume the due and punctual observance and performance of each and
every covenant and condition of this Warrant to be performed and observed by the
Company and all the obligations and liabilities hereunder, subject to such
modifications as may be deemed appropriate (as determined in good faith by
resolution of the Board of Directors of the Company) in order to provide for
adjustments of shares of Common Stock for which this Warrant is exercisable
which shall be as nearly equivalent as practicable to the adjustments provided
for in this Section 11. For purposes of this Section 11, "common stock of the
successor or acquiring corporation" shall include stock of such corporation of
any class which is not preferred as to dividends or assets over any other class
of stock of such corporation and which is not subject to redemption and shall
also include any evidences of indebtedness, shares of stock or other securities
which are convertible into or exchangeable for any such stock, either
immediately or upon the arrival of a specified date or the happening of a
specified event and any warrants or other rights to subscribe for or purchase
any such stock. The foregoing provisions of this Section 11 shall similarly
apply to successive reorganizations, reclassifications, mergers, consolidations
or disposition of assets.

            12. Voluntary Adjustment by the Company. The Company may at any time
during the term of this Warrant, reduce the then current Exercise Price to any
amount and for any period of time deemed appropriate by the Board of Directors
of the Company.

            13. Notice of Adjustment. Whenever the number of Warrant Shares or
number or kind of securities or other property purchasable upon the exercise of
this Warrant or the Exercise Price is adjusted, as herein provided, the Company
shall promptly mail by registered or certified mail, return receipt requested,
to the holder of this Warrant notice of such adjustment or adjustments setting
forth the number of Warrant Shares (and other securities or property)
purchasable upon the exercise of this Warrant and the Exercise Price of such
Warrant Shares (and other securities or property) after such adjustment, setting
forth a brief statement of the facts requiring such adjustment and setting forth
the computation by which such adjustment was

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made. Such notice, in the absence of manifest error, shall be conclusive
evidence of the correctness of such adjustment.

            14. Notice of Corporate Action. If at any time:

                (a) the Company shall take a record of the holders of its Common
Stock for the purpose of entitling them to receive a dividend or other
distribution, or any right to subscribe for or purchase any evidences of its
indebtedness, any shares of stock of any class or any other securities or
property, or to receive any other right, or

                (b) there shall be any capital reorganization of the Company,
any reclassification or recapitalization of the capital stock of the Company or
any consolidation or merger of the Company with, or any sale, transfer or other
disposition of all or substantially all the property, assets or business of the
Company to, another corporation or,

                (c) there shall be a voluntary or involuntary dissolution,
liquidation or winding up of the Company;

then, in any one or more of such cases, the Company shall give to Holder (i) at
least 10 days' prior written notice of the record date for such dividend,
distribution or right or for determining rights to vote in respect of any such
reorganization, reclassification, merger, consolidation, sale, transfer,
disposition, liquidation or winding up, and (ii) in the case of any such
reorganization, reclassification, merger, consolidation, sale, transfer,
disposition, dissolution, liquidation or winding up, at least 10 days' prior
written notice of the date when the same shall take place. Such notice in
accordance with the foregoing clause also shall specify (i) the date on which
any such record is to be taken for the purpose of such dividend, distribution or
right, the date on which the holders of Common Stock shall be entitled to any
such dividend, distribution or right, and the amount and character thereof, and
(ii) the date on which any such reorganization, reclassification, merger,
consolidation, sale, transfer, disposition, dissolution, liquidation or winding
up is to take place and the time, if any such time is to be fixed, as of which
the holders of Common Stock shall be entitled to exchange their shares of Common
Stock for securities or other property deliverable upon such disposition,
dissolution, liquidation or winding up. Each such written notice shall be
sufficiently given if addressed to Holder at the last address of Holder
appearing on the books of the Company and delivered in accordance with Section
16(d).

            15. Authorized Shares. The Company covenants that during the period
the Warrant is outstanding, it will reserve from its authorized and unissued
Common Stock a sufficient number of shares to provide for the issuance of the
Warrant Shares upon the exercise of any purchase rights under this Warrant. The
Company further covenants that its issuance of this Warrant shall constitute
full authority to its officers who are charged with the duty of executing stock
certificates to execute and issue the necessary certificates for the Warrant
Shares upon the exercise of the purchase rights under this Warrant. The Company
will take all such reasonable action as may be necessary to assure that such
Warrant Shares may be issued as provided herein without violation of any
applicable law or regulation, or of any requirements of the Principal Market
upon which the Common Stock may be listed.

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                The Company shall not by any action, including, without
limitation, amending its certificate of incorporation or through any
reorganization, transfer of assets, consolidation, merger, dissolution, issue or
sale of securities or any other voluntary action, avoid or seek to avoid the
observance or performance of any of the terms of this Warrant, but will at all
times in good faith assist in the carrying out of all such terms and in the
taking of all such actions as may be necessary or appropriate to protect the
rights of Holder against impairment. Without limiting the generality of the
foregoing, the Company will (a) not increase the par value of any shares of
Common Stock receivable upon the exercise of this Warrant above the amount
payable therefor upon such exercise immediately prior to such increase in par
value, (b) take all such action as may be necessary or appropriate in order that
the Company may validly and legally issue fully paid and nonassessable shares of
Common Stock upon the exercise of this Warrant, and (c) use its best efforts to
obtain all such authorizations, exemptions or consents from any public
regulatory body having jurisdiction thereof as may be necessary to enable the
Company to perform its obligations under this Warrant.

                Before taking any action which would cause an adjustment
reducing the current Exercise Price below the then par value, if any, of the
shares of Common Stock issuable upon exercise of the Warrants, the Company shall
take any corporate action which may be necessary in order that the Company may
validly and legally issue fully paid and non-assessable shares of such Common
Stock at such adjusted Exercise Price.

                Before taking any action which would result in an adjustment in
the number of shares of Common Stock for which this Warrant is exercisable or in
the Exercise Price, the Company shall obtain all such authorizations or
exemptions thereof, or consents thereto, as may be necessary from any public
regulatory body or bodies having jurisdiction thereof.

            16. Miscellaneous.

                (a) Jurisdiction. This Warrant shall be binding upon any
successors or assigns of the Company. This Warrant shall constitute a contract
under the laws of Delaware without regard to its conflict of law, principles or
rules, and be subject to arbitration pursuant to the terms set forth in the
Purchase Agreement.

                (b) Restrictions. The holder hereof acknowledges that the
Warrant Shares acquired upon the exercise of this Warrant, if not registered,
will have restrictions upon resale imposed by state and federal securities laws.

                (c) Nonwaiver and Expenses. No course of dealing or any delay or
failure to exercise any right hereunder on the part of Holder shall operate as a
waiver of such right or otherwise prejudice Holder's rights, powers or remedies,
notwithstanding all rights hereunder terminate on the Termination Date. If the
Company fails to comply with any provision of this Warrant, the Company shall
pay to Holder such amounts as shall be sufficient to cover any costs and
expenses including, but not limited to, reasonable attorneys' fees, including
those of appellate proceedings, incurred by Holder in collecting any amounts due
pursuant hereto or in otherwise enforcing any of its rights, powers or remedies
hereunder.

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                (d) Notices. Any notice, request or other document required or
permitted to be given or delivered to the holder hereof by the Company shall be
delivered in accordance with the notice provisions of the Purchase Agreement.

                (e) Limitation of Liability. No provision hereof, in the absence
of affirmative action by Holder to purchase shares of Common Stock, and no
enumeration herein of the rights or privileges of Holder hereof, shall give rise
to any liability of Holder for the purchase price of any Common Stock or as a
stockholder of the Company, whether such liability is asserted by the Company or
by creditors of the Company.

                (f) Remedies. Holder, in addition to being entitled to exercise
all rights granted by law, including recovery of damages, will be entitled to
specific performance of its rights under this Warrant. The Company agrees that
monetary damages would not be adequate compensation for any loss incurred by
reason of a breach by it of the provisions of this Warrant and hereby agrees to
waive the defense in any action for specific performance that a remedy at law
would be adequate.

                (g) Successors and Assigns. Subject to applicable securities
laws, this Warrant and the rights and obligations evidenced hereby shall inure
to the benefit of and be binding upon the successors of the Company and the
successors and permitted assigns of Holder. The provisions of this Warrant are
intended to be for the benefit of all Holders from time to time of this Warrant
and shall be enforceable by any such Holder or holder of Warrant Shares.

                (h) Indemnification. The Company agrees to indemnify and hold
harmless Holder from and against any liabilities, obligations, losses, damages,
penalties, actions, judgments, suits, claims, costs, attorneys' fees, expenses
and disbursements of any kind which may be imposed upon, incurred by or asserted
against Holder in any manner relating to or arising out of any failure by the
Company to perform or observe in any material respect any of its covenants,
agreements, undertakings or obligations set forth in this Warrant; provided,
however, that the Company will not be liable hereunder to the extent that any
liabilities, obligations, losses, damages, penalties, actions, judgments, suits,
claims, costs, attorneys' fees, expenses or disbursements are found in a final
non-appealable judgment by a court to have resulted from Holder's negligence,
bad faith or willful misconduct.

                (i) Amendment. This Warrant may be modified or amended or the
provisions hereof waived with the written consent of the Company and the Holder.

                (j) Severability. Wherever possible, each provision of this
Warrant shall be interpreted in such manner as to be effective and valid under
applicable law, but if any provision of this Warrant shall be prohibited by or
invalid under applicable law, such provision shall be ineffective to the extent
of such prohibition or invalidity, without invalidating the remainder of such
provisions or the remaining provisions of this Warrant.

                (k) Headings. The headings used in this Warrant are for the
convenience of reference only and shall not, for any purpose, be deemed a part
of this Warrant.

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            IN WITNESS WHEREOF, the Company has caused this Warrant to be
executed by its officer thereunto duly authorized.

Dated: February 24, 2000

                                     DENTAL/MEDICAL DIAGNOSTIC SYSTEMS, INC.

                                     By:  /s/  ROBERT H. GUREVITCH
                                         -----------------------------------
                                         Robert H. Gurevitch, President

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                               NOTICE OF EXERCISE

To:     Dental/Medical Diagnostic Systems, Inc.

            (1) The undersigned hereby elects to purchase ________ shares of
Common Stock (the "Common Stock"), of Dental/Medical Diagnostic Systems, Inc.
pursuant to the terms of the attached Warrant, and tenders herewith payment of
the exercise price in full, together with all applicable transfer taxes, if any.

            (2) Please issue a certificate or certificates representing said
shares of Common Stock in the name of the undersigned or in such other name as
is specified below:

                --------------------------------------
                (Name)

                --------------------------------------
                (Address)
                --------------------------------------

Dated:

                                                   -----------------------------
                                                   Signature

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                                 ASSIGNMENT FORM
                    (To assign the foregoing warrant, execute
                   this form and supply required information.
                 Do not use this form to exercise the warrant.)

            FOR VALUE RECEIVED, the foregoing Warrant and all rights evidenced
thereby are hereby assigned to

_______________________________________________ whose address is

________________________________________________________________________.

_________________________________________________________________________

                                            Dated:  ______________, _______

                      Holder's Signature:   _____________________________

                      Holder's Address:     _____________________________

                                            _____________________________

Signature Guaranteed:  __________________________________________________

NOTE: The signature to this Assignment Form must correspond with the name as it
appears on the face of the Warrant, without alteration or enlargement or any
change whatsoever, and must be guaranteed by a bank or trust company. Officers
of corporations and those acting in an fiduciary or other representative
capacity should file proper evidence of authority to assign the foregoing
Warrant.<PAGE>   1
                                                                   EXHIBIT 10.49

                                                                       EXHIBIT C

                          REGISTRATION RIGHTS AGREEMENT

            THIS REGISTRATION RIGHTS AGREEMENT, dated as of February 24, 2000,
between the investor or investors signatory hereto (each an "Investor" and
together the "Investors"), and Dental/Medical Diagnostic Systems, Inc. a
Delaware corporation (the "Company").

            WHEREAS, simultaneously with the execution and delivery of this
Agreement, the Investors are purchasing from the Company, pursuant to an
Exchangeable Preferred Stock and Warrants Purchase Agreement dated the date
hereof (the "Purchase Agreement"), up to Two Million Seven Hundred Fifty
Thousand Dollars ($2,750,000) Stated Value of Exchangeable Preferred Stock and
B-1 Warrants to purchase up to 275,000 shares of Common Stock and B-2 Warrants
to purchase up to 550,000 shares of Common Stock (terms not defined herein shall
have the meanings ascribed to them in the Purchase Agreement); and

            WHEREAS, the Company desires to grant to the Investors the
registration rights set forth herein with respect to the Exchange Shares of
Common Stock issuable upon exchange of or as dividends upon the Exchangeable
Preferred Stock purchased pursuant to the Purchase Agreement and shares of
Common Stock issuable upon exercise of the Warrants (hereinafter referred to as
the "Stock" or "Securities" of the Company).

            NOW, THEREFORE, the parties hereto mutually agree as follows:

            Section 1. Registrable Securities. As used herein the term
"Registrable Security" means the Securities until (i) the Registration Statement
has been declared effective by the Commission, and all Securities have been
disposed of pursuant to the Registration Statement, (ii) all Securities have
been sold under circumstances under which all of the applicable conditions of
Rule 144 (or any similar provision then in force) under the Securities Act
("Rule 144") are met, (iii) all Securities have been otherwise transferred to
holders who may trade such Securities without restriction under the Securities
Act, and the Company has delivered a new certificate or other evidence of
ownership for such Securities not bearing a restrictive legend or (iv) such time
as, in the opinion of counsel to the Company, all Securities may be sold without
any time, volume or manner limitations pursuant to Rule 144(k) (or any similar
provision then in effect) under the Securities Act. The term "Registrable
Securities" means any and/or all of the securities falling within the foregoing
definition of a "Registrable Security." In the event of any merger,
reorganization, consolidation, recapitalization or other change in corporate
structure affecting the Common Stock, such adjustment shall be deemed to be made
in the definition of "Registrable Security" as is appropriate in order to
prevent any dilution or enlargement of the rights granted pursuant to this
Agreement.

            Section 2. Restrictions on Transfer. Each Investor acknowledges and
understands that prior to the registration of the Securities as provided herein,
the Securities are "restricted securities" as defined in Rule 144 promulgated
under the Act. Each Investor understands that no disposition or transfer of the
Securities may be made by Investor in the

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absence of (i) an opinion of counsel to the Investor, in form and substance
reasonably satisfactory to the Company, that such transfer may be made without
registration under the Securities Act or (ii) such registration.

                With a view to making available to the Investors the benefits of
Rule 144 under the Securities Act or any other similar rule or regulation of the
Commission that may at any time permit the Investors to sell securities of the
Company to the public without registration ("Rule 144"), the Company agrees to:

                (a) comply with the provisions of paragraph (c)(1) of Rule 144;
and

                (b) file with the Commission in a timely manner all reports and
other documents required to be filed with the Commission pursuant to Section 13
or 15(d) under the Exchange Act by companies subject to either of such sections,
irrespective of whether the Company is then subject to such reporting
requirements.

                Section 3. Registration Rights With Respect to the Securities.

                (a) The Company agrees that it will prepare and file with the
Securities and Exchange Commission ("Commission"), within forty-five (45) days
after the Closing Date a registration statement (on Form S-3, or other
appropriate registration statement form) under the Securities Act (the
"Registration Statement"), at the sole expense of the Company (except as
provided in Section 3(c) hereof), in respect of the Investors, so as to permit a
public offering and resale of the Securities under the Act by the Investors as
selling stockholders and not as underwriters.

                The Company shall use its best efforts to cause such
Registration Statement to become effective within ninety (90) days from the
Closing Date (or 120 days from the Closing Date if the SEC makes a "full review"
of the Registration Statement) or, if earlier, within five (5) days of SEC
clearance to request acceleration of effectiveness. The number of shares
designated in the Registration Statement to be registered shall include the
Warrant Shares, at least 175% of the number of shares issuable upon exchange of
the Exchangeable Preferred Stock assuming exchange in full on the day prior to
filing date of the Registration Statement, and such number of shares as the
Company deems prudent for the purpose of issuing shares of Common Stock as
dividends on the Exchangeable Preferred Stock, and shall include appropriate
language regarding reliance upon Rule 416 to the extent permitted by the
Commission. The Company will notify the Investors of the effectiveness of the
Registration Statement within one Trading Day of such event. In the event that
the number of shares so registered shall be less than 125% of the number of
shares of Registrable Securities remaining unsold (using the Exchange Price of
the Exchangeable Preferred Stock from time to time), or if the SEC does not
permit the registration of the Exchange Shares issuable upon exchange of the
Optional Exchangeable Preferred Stock in the initial Registration Statement,
then the Company shall be obligated to file, within thirty (30) days of such
event (in the case of insufficient shares) or within 30 days of demand by any
Investor who purchases Optional Exchangeable Preferred Stock, a further
Registration Statement registering such remaining shares and shall use its best
efforts to cause

                                       2
<PAGE>   3

such additional Registration Statement to become effective within ninety (90)
days of the date of such event.

                (b) The Company will maintain the Registration Statement or
post-effective amendment filed under this Section 3 effective under the
Securities Act until the earlier of (i) the date that none of the Securities
covered by such Registration Statement are or may become issued and outstanding,
(ii) the date that all of the Securities have been sold pursuant to such
Registration Statement, (iii) the date the Investors receive an opinion of
counsel to the Company, which counsel shall be reasonably acceptable to the
Investors, that the Securities may be sold under the provisions of Rule 144
without limitation as to volume, (iv) all Securities have been otherwise
transferred to persons who may trade such shares without restriction under the
Securities Act, and the Company has delivered a new certificate or other
evidence of ownership for such securities not bearing a restrictive legend, or
(v) all Securities may be sold without any time, volume or manner limitations
pursuant to Rule 144(k) or any similar provision then in effect under the
Securities Act in the opinion of counsel to the Company, which counsel shall be
reasonably acceptable to the Investor (the "Effectiveness Period").

                (c) All fees, disbursements and out-of-pocket expenses and costs
incurred by the Company in connection with the preparation and filing of the
Registration Statement under subparagraph 3(a) and in complying with applicable
securities and Blue Sky laws (including, without limitation, all attorneys' fees
of the Company) shall be borne by the Company. The Investors shall bear the cost
of underwriting and/or brokerage discounts, fees and commissions, if any,
applicable to the Securities being registered and the fees and expenses of their
counsel. The Investors and their counsel shall have a reasonable period, not to
exceed five (5) Trading Days, to review the proposed Registration Statement or
any amendment thereto, prior to filing with the Commission, and the Company
shall provide each Investor with copies of any comment letters received from the
Commission with respect thereto within two (2) Trading Days of receipt thereof.
The Company shall qualify any of the Securities for sale in such states as any
Investor reasonably designates and shall furnish indemnification in the manner
provided in Section 6 hereof. However, the Company shall not be required to
qualify in any state which will require an escrow or other restriction relating
to the Company and/or the sellers, or which will require the Company to qualify
to do business in such state or require the Company to file therein any general
consent to service of process. The Company at its expense will supply the
Investors with copies of the applicable Registration Statement and the
prospectus included therein and other related documents in such quantities as
may be reasonably requested by the Investors.

                (d) The Company shall not be required by this Section 3 to
include any Investor's Securities in any Registration Statement which is to be
filed if, in the opinion of counsel to the Company, the proposed offering or
other transfer as to which such registration is requested is exempt from
applicable federal and state securities laws and would result in all purchasers
or transferees obtaining securities which are not "restricted securities", as
defined in Rule 144 under the Securities Act.

                (e) In the event that (i) the Registration Statement to be filed
by the Company pursuant to Section 3(a) above is not filed with the Commission
within forty-five (45)

                                       3
<PAGE>   4

days from the Closing Date, (ii) such Registration Statement is not declared
effective by the Commission within the earlier of ninety (90) days from the
Closing Date (or 120 days from the Closing Date if the Commission makes a "full
review" of the Registration Statement) or five (5) days of clearance by the
Commission to request effectiveness, (iii) such Registration Statement is not
maintained as effective by the Company for the period set forth in Section 3(b)
above or (iv) the additional Registration Statement referred to in Section 3(a)
is not filed within thirty (30) days or declared effective within ninety (90)
days as set forth therein (each a "Registration Default") then the Company will
pay Investor (pro rated on a daily basis), as liquidated damages for such
failure and not as a penalty one percent (1%) of the aggregate market value of
shares of Common Stock purchased from the Company (including the Exchange Shares
which would be issuable upon Exchange of the Exchangeable Preferred Stock on any
date of determination, and whether or not the Exchangeable Preferred Stock are
then exchangeable pursuant to their terms) and held by the Investor for each
week until such Registration Statement has been filed, and in the event of late
effectiveness (in case of clause (ii) above) or lapsed effectiveness (in the
case of clause (iii) above), one percent (1%) of the aggregate market value of
shares of Common Stock purchased from the Company and held by the Investor
(including the Exchange Shares which would be issuable upon exchange of the
Exchangeable Preferred Stock on any date of determination, and whether or not
the Exchangeable Preferred Stock are then exchangeable pursuant to their terms)
for each week (regardless of whether one or more such Registration Defaults are
then in existence) until such Registration Statement has been declared
effective. Such payment of the liquidated damages shall be made to the Investors
in cash, within five (5) calendar days of demand, provided, however, that the
payment of such liquidated damages shall not relieve the Company from its
obligations to register the Securities pursuant to this Section. The market
value of the Common Stock for this purpose shall be the closing price (or last
trade, if so reported) on the Principal Market for each day during such
Registration Default. Notwithstanding anything to the contrary contained herein,
a failure to obtain or maintain the effectiveness of a filed Registration
Statement or the ability of an Investor to use an otherwise effective
Registration Statement to effect resales of Securities during the period after
45 days and within 90 days from the end of the Company's fiscal year resulting
solely from the need to update the Company's financial statements contained or
incorporated by reference in such Registration Statement shall not constitute a
Registration Default and shall not trigger the accrual of liquidated damages
hereunder.

                If the Company does not remit the payment to the Investors as
set forth above, the Company will pay the Investors reasonable costs of
collection, including attorneys' fees, in addition to the liquidated damages.
The registration of the Securities pursuant to this provision shall not affect
or limit the Investors' other rights or remedies as set forth in this Agreement.

                (f) No provision contained herein shall preclude the Company
from selling securities pursuant to any Registration Statement in which it is
required to include Securities pursuant to this Section 3.

                (g) If at any time or from time to time after the effective date
of any Registration Statement, the Company notifies the Investors in writing of
the existence of a Potential Material Event (as defined in Section 3(h) below),
the Investors shall not offer or sell

                                       4
<PAGE>   5

any Securities or engage in any other transaction involving or relating to
Securities, from the time of the giving of notice with respect to a Potential
Material Event until the Investors receive written notice from the Company that
such Potential Material Event either has been disclosed to the public or no
longer constitutes a Potential Material Event; provided, however, that the
Company may not so suspend the right to such holders of Securities for more than
thirty (30) days in the aggregate (90 days in the case of an acquisition
requiring the filing of audited financial statements of the acquired business
under Form 8-K) during any twelve month period, during the period the
Registration Statement is required to be in effect, and if such period is
exceeded, such event shall be a Registration Default. If a Potential Material
Event shall occur prior to the date a Registration Statement is required to be
filed, then the Company's obligation to file such Registration Statement shall
be delayed without penalty for not more than twenty (20) days, and such delay or
delays shall not constitute a Registration Default. The Company must, if lawful,
give the Investors notice in writing at least two (2) Trading Days prior to the
first day of the blackout period.

                (h) "Potential Material Event" means any of the following: (a)
the possession by the Company of material information not ripe for disclosure in
a registration statement, as determined in good faith by the Chief Executive
Officer or the Board of Directors of the Company that disclosure of such
information in a Registration Statement would be detrimental to the business and
affairs of the Company; or (b) any material engagement or activity by the
Company which would, in the good faith determination of the Chief Executive
Officer or the Board of Directors of the Company, be adversely affected by
disclosure in a registration statement at such time.

            Section 4. Cooperation with Company. The Investors will cooperate
with the Company in all respects in connection with this Agreement, including
timely supplying all information and confirmations reasonably requested by the
Company or the Commission (which shall include all information regarding the
Investors and proposed manner of sale of the Registrable Securities required to
be disclosed in any Registration Statement) and executing and returning all
documents reasonably requested in connection with the registration and sale of
the Registrable Securities and entering into and performing their obligations
under any underwriting agreement, if the offering is an underwritten offering,
in usual and customary form, with the managing underwriter or underwriters of
such underwritten offering. Nothing in this Agreement shall obligate any
Investor to consent to be named as an underwriter in any Registration Statement.
The obligation of the Company to register the Registrable Securities shall be
absolute and unconditional as to those Securities which the Commission will
permit to be registered without naming the Investors as underwriters. Any delay
or delays caused by the Investors by failure to cooperate as required hereunder
shall not constitute a Registration Default.

            Section 5. Registration Procedures. If and whenever the Company is
required by any of the provisions of this Agreement to effect the registration
of any of the Registrable Securities under the Act, the Company shall (except as
otherwise provided in this Agreement), as expeditiously as possible, subject to
the Investors' assistance and cooperation as reasonably required with respect to
each Registration Statement:

                                       5
<PAGE>   6

                (a) (i)prepare and file with the Commission such amendments and
supplements to the Registration Statement and the prospectus used in connection
therewith as may be necessary to keep such Registration Statement effective and
to comply with the provisions of the Act with respect to the sale or other
disposition of all securities covered by such registration statement whenever
the Investors shall desire to sell or otherwise dispose of the same (including
prospectus supplements with respect to the sales of securities from time to time
in connection with a registration statement pursuant to Rule 415 promulgated
under the Act) and (ii) take all lawful action such that each of (A) the
Registration Statement and any amendment thereto does not, when it becomes
effective, contain 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 light of the circumstances under which they were made, not
misleading and (B) the prospectus forming part of the Registration Statement,
and any amendment or supplement thereto, does not at any time during the
Registration Period include 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 light of the circumstances under which they were made,
not misleading;

                (b) (i)prior to the filing with the Commission of any
Registration Statement (including any amendments thereto) and the distribution
or delivery of any prospectus (including any supplements thereto), provide draft
copies thereof to the Investors as required by Section 3(c) and reflect in such
documents all such comments as the Investors (and their counsel) reasonably may
propose respecting the Selling Shareholders and Plan of Distribution sections
(or equivalents) and (ii) furnish to each Investor such numbers of copies of a
prospectus including a preliminary prospectus or any amendment or supplement to
any prospectus, as applicable, in conformity with the requirements of the Act,
and such other documents, as such Investor may reasonably request in order to
facilitate the public sale or other disposition of the securities owned by such
Investor;

                (c) register and qualify the Registrable Securities covered by
the Registration Statement under such other securities or blue sky laws of such
jurisdictions as the Investors shall reasonably request (subject to the
limitations set forth in Section 3(c) above), and do any and all other acts and
things which may be necessary or advisable to enable each Investor to consummate
the public sale or other disposition in such jurisdiction of the securities
owned by such Investor;

                (d) list such Registrable Securities on the Principal Market, if
the listing of such Registrable Securities is then permitted under the rules of
such Principal Market;

                (e) notify each Investor at any time when a prospectus relating
thereto covered by the Registration Statement is required to be delivered under
the Act, of the happening of any event of which it has knowledge as a result of
which the prospectus included in the Registration Statement, as then in effect,
includes an untrue statement of a material fact or omits to state a material
fact required to be stated therein or necessary to make the statements therein
not misleading in the light of the circumstances then existing, and the Company
shall use its best efforts to prepare and file a curative amendment under
Section 5(a);

                                       6
<PAGE>   7

                (f) as promptly as practicable after becoming aware of such
event, notify each Investor who holds Registrable Securities being sold (or, in
the event of an underwritten offering, the managing underwriters) of the
issuance by the Commission of any stop order or other suspension of the
effectiveness of the Registration Statement at the earliest possible time and
take all lawful action to effect the withdrawal, recession or removal of such
stop order or other suspension;

                (g) cooperate with the Investors to facilitate the timely
preparation and delivery of certificates for the Registrable Securities to be
offered pursuant to the Registration Statement and enable such certificates for
the Registrable Securities to be in such denominations or amounts, as the case
may be, as the Investors reasonably may request and registered in such names as
the Investors may request; and, within three (3) Trading Days after a
Registration Statement which includes Registrable Securities is declared
effective by the Commission, deliver and cause legal counsel selected by the
Company to deliver to the transfer agent for the Registrable Securities (with
copies to the Investors) an appropriate instruction and, to the extent
necessary, an opinion of such counsel;

                (h) take all such other lawful actions reasonably necessary to
expedite and facilitate the disposition by the Investors of their Registrable
Securities in accordance with the intended methods therefor provided in the
prospectus which are customary for issuers to perform under the circumstances;

                (i) in the event of an underwritten offering, promptly include
or incorporate in a prospectus supplement or post-effective amendment to the
Registration Statement such information as the managers reasonably agree should
be included therein and to which the Company does not reasonably object and make
all required filings of such prospectus supplement or post-effective amendment
as soon as practicable after it is notified of the matters to be included or
incorporated in such Prospectus supplement or post-effective amendment; and

                      (j) maintain a transfer agent and registrar for its Common
Stock.

            Section 6. Indemnification.

                (a) To the maximum extent permitted by law, the Company agrees
to indemnify and hold harmless the Investors and each person, if any, who
controls an Investor within the meaning of the Securities Act (each a
"Distributing Investor") against any losses, claims, damages or liabilities,
joint or several (which shall, for all purposes of this Agreement, include, but
not be limited to, all reasonable costs of defense and investigation and all
reasonable attorneys' fees and expenses), to which the Distributing Investor may
become subject, under the Securities Act or otherwise, insofar as such losses,
claims, damages or liabilities (or actions in respect thereof) arise out of or
are based upon any untrue statement or alleged untrue statement of any material
fact contained in any Registration Statement, or any related final prospectus or
amendment or supplement thereto, or arise out of or are based upon the omission
or alleged omission to state therein a material fact required to be stated
therein or necessary to make the statements therein not misleading; provided,
however, that the Company will not be liable in any such case to the extent, and
only to the extent, that any such loss, claim, damage or liability

                                       7
<PAGE>   8

arises out of or is based upon an untrue statement or alleged untrue statement
or omission or alleged omission made in such Registration Statement, preliminary
prospectus, final prospectus or amendment or supplement thereto in reliance
upon, and in conformity with, written information furnished to the Company by
the Distributing Investor, its counsel, affiliates or any underwriter,
specifically for use in the preparation thereof. This indemnity agreement will
be in addition to any liability which the Company may otherwise have.

                (b) To the maximum extent permitted by law, each Distributing
Investor agrees that it will indemnify and hold harmless the Company, and each
officer and director of the Company or person, if any, who controls the Company
within the meaning of the Securities Act, against any losses, claims, damages or
liabilities (which shall, for all purposes of this Agreement, include, but not
be limited to, all reasonable costs of defense and investigation and all
reasonable attorneys' fees and expenses) to which the Company or any such
officer, director or controlling person may become subject under the Securities
Act or otherwise, insofar as such losses, claims, damages or liabilities (or
actions in respect thereof) arise out of or are based upon any untrue statement
or alleged untrue statement of any material fact contained in any Registration
Statement, or any related final prospectus or amendment or supplement thereto,
or arise out of or are based upon the omission or the alleged omission to state
therein a material fact required to be stated therein or necessary to make the
statements therein not misleading, but in each case only to the extent that such
untrue statement or alleged untrue statement or omission or alleged omission was
made in such Registration Statement, final prospectus or amendment or supplement
thereto in reliance upon, and in conformity with, written information furnished
to the Company by such Distributing Investor, its counsel, affiliates or any
underwriter, specifically for use in the preparation thereof. This indemnity
agreement will be in addition to any liability which the Distributing Investor
may otherwise have.

                (c) Promptly after receipt by an indemnified party under this
Section 6 of notice of the commencement of any action against such indemnified
party, such indemnified party will, if a claim in respect thereof is to be made
against the indemnifying party under this Section 6, notify the indemnifying
party in writing of the commencement thereof; but the omission to so notify the
indemnifying party will not relieve the indemnifying party from any liability
which it may have to any indemnified party except to the extent the failure of
the indemnified party to provide such written notification actually prejudices
the ability of the indemnifying party to defend such action. In case any such
action is brought against any indemnified party, and it notifies the
indemnifying party of the commencement thereof, the indemnifying party will be
entitled to participate in, and, to the extent that it may wish, jointly with
any other indemnifying party similarly notified, assume the defense thereof,
subject to the provisions herein stated and after notice from the indemnifying
party to such indemnified party of its election so to assume the defense
thereof, the indemnifying party will not be liable to such indemnified party
under this Section 6 for any legal or other expenses subsequently incurred by
such indemnified party in connection with the defense thereof other than
reasonable costs of investigation, unless the indemnifying party shall not
pursue the action to its final conclusion. The indemnified parties as a group
shall have the right to employ one separate counsel in any such action and to
participate in the defense thereof, but the fees and expenses of such counsel
shall not be at the expense of the indemnifying party if the indemnifying party
has assumed the defense of the action with counsel reasonably satisfactory to
the indemnified party unless (i) the

                                       8
<PAGE>   9

employment of such counsel has been specifically authorized in writing by the
indemnifying party, or (ii) the named parties to any such action (including any
impleaded parties) include both the indemnified party and the indemnifying party
and the indemnified party shall have been advised by its counsel that there may
be one or more legal defenses available to the indemnifying party different from
or in conflict with any legal defenses which may be available to the indemnified
party or any other indemnified party (in which case the indemnifying party shall
not have the right to assume the defense of such action on behalf of such
indemnified party, it being understood, however, that the indemnifying party
shall, in connection with any one such action or separate but substantially
similar or related actions in the same jurisdiction arising out of the same
general allegations or circumstances, be liable only for the reasonable fees and
expenses of one separate firm of attorneys for the indemnified party, which firm
shall be designated in writing by the indemnified party). No settlement of any
action against an indemnified party shall be made without the prior written
consent of the indemnified party, which consent shall not be unreasonably
withheld so long as such settlement includes a full release of claims against
the indemnified party.

            Section 7. Contribution. In order to provide for just and equitable
contribution under the Securities Act in any case in which (i) the indemnified
party makes a claim for indemnification pursuant to Section 6 hereof but is
judicially determined (by the entry of a final judgment or decree by a court of
competent jurisdiction and the expiration of time to appeal or the denial of the
last right of appeal) that such indemnification may not be enforced in such case
notwithstanding the fact that the express provisions of Section 6 hereof provide
for indemnification in such case, or (ii) contribution under the Securities Act
may be required on the part of any indemnified party, then the Company and the
applicable Distributing Investor shall contribute to the aggregate losses,
claims, damages or liabilities to which they may be subject (which shall, for
all purposes of this Agreement, include, but not be limited to, all reasonable
costs of defense and investigation and all reasonable attorneys' fees and
expenses), in either such case (after contribution from others) on the basis of
relative fault as well as any other relevant equitable considerations. The
relative fault 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 the
Company on the one hand or the applicable Distributing Investor on the other
hand, and the parties' relative intent, knowledge, access to information and
opportunity to correct or prevent such statement or omission. The Company and
the Distributing Investor agree that it would not be just and equitable if
contribution pursuant to this Section 7 were determined by pro rata allocation
or by any other method of allocation which does not take account of the
equitable considerations referred to in this Section 7. The amount paid or
payable by an indemnified party as a result of the losses, claims, damages or
liabilities (or actions in respect thereof) referred to above in this Section 7
shall be deemed to include any legal or other expenses reasonably incurred by
such indemnified party in connection with investigating or defending any such
action or claim. 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.

Notwithstanding any other provision of this Section 7, in no event shall any (i)
Investor be required to undertake liability to any person under this Section 7
for any amounts in excess of the

                                       9
<PAGE>   10

dollar amount of the proceeds received by such Investor from the sale of such
Investor's Registrable Securities (after deducting any fees, discounts and
commissions applicable thereto) pursuant to any Registration Statement under
which such Registrable Securities are registered under the Securities Act and
(ii) underwriter be required to undertake liability to any person hereunder for
any amounts in excess of the aggregate discount, commission or other
compensation payable to such underwriter with respect to the Registrable
Securities underwritten by it and distributed pursuant to such Registration
Statement.

            Section 8. Notices. All notices, demands, requests, consents,
approvals, and other communications required or permitted hereunder shall be in
writing and, unless otherwise specified herein, shall be (i) hand delivered,
(ii) deposited in the mail, registered or certified, return receipt requested,
postage prepaid, (iii) delivered by reputable air courier service with charges
prepaid, or (iv) transmitted by facsimile, addressed as set forth in the
Purchase Agreement 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 in the
Purchase Agreement (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 first business day following
the date of sending by reputable courier service, fully prepaid, addressed to
such address, or (c) upon actual receipt of such mailing, if mailed. Either
party hereto may from time to time change its address or facsimile number for
notices under this Section 8 by giving at least ten (10) days' prior written
notice of such changed address or facsimile number to the other party hereto.

            Section 9. Assignment. This Agreement is binding upon and inures to
the benefit of the parties hereto and their respective heirs, successors and
permitted assigns. The rights granted the Investors under this Agreement may be
assigned to any purchaser of substantially all of the Registrable Securities (or
the rights thereto) from an Investor, as otherwise permitted by the Purchase
Agreement.

            Section 10. Additional Covenants of the Company. The Company agrees
that at such time as it otherwise meets the requirements for the use of
Securities Act Registration Statement on Form S-3 for the purpose of registering
the Registrable Securities, it shall file all reports and information required
to be filed by it with the Commission in a timely manner and take all such other
action so as to maintain such eligibility for the use of such form.

            Section 11. Counterparts/Facsimile. This Agreement may be executed
in two or more counterparts, each of which shall constitute an original, but all
of which, when together shall constitute but one and the same instrument, and
shall become effective when one or more counterparts have been signed by each
party hereto and delivered to the other parties. In lieu of the original, a
facsimile transmission or copy of the original shall be as effective and
enforceable as the original.

                                       10
<PAGE>   11

            Section 12. Remedies. The remedies provided in this Agreement are
cumulative and not exclusive of any remedies provided by law. If any term,
provision, covenant or restriction of this Agreement is held by a court of
competent jurisdiction to be invalid, illegal, void or unenforceable, the
remainder of the terms, provisions, covenants and restrictions set forth herein
shall remain in full force and effect and shall in no way be affected, impaired
or invalidated, and the parties hereto shall use their best efforts to find and
employ an alternative means to achieve the same or substantially the same result
as that contemplated by such term, provision, covenant or restriction.

            Section 13. Conflicting Agreements. The Company shall not enter into
any agreement with respect to its securities that is inconsistent with the
rights granted to the holders of Registrable Securities in this Agreement or
otherwise prevents the Company from complying with all of its obligations
hereunder.

            Section 14. Headings. The headings in this Agreement are for
reference purposes only and shall not affect in any way the meaning or
interpretation of this Agreement.

            Section 15. Governing Law, Arbitration. This Agreement shall be
governed by and construed in accordance with the laws of the State of New York
applicable to contracts made in New York by persons domiciled in New York City
and without regard to its principles of conflicts of laws. Any dispute under
this Agreement shall be submitted to arbitration under the American Arbitration
Association (the "AAA") in New York City, New York, and shall be finally and
conclusively determined by the decision of a board of arbitration consisting of
three (3) members (hereinafter referred to as the "Board of Arbitration")
selected as according to the rules governing the AAA. The Board of Arbitration
shall meet on consecutive business days in New York City, New York, and shall
reach and render a decision in writing (concurred in by a majority of the
members of the Board of Arbitration) with respect to the amount, if any, which
the losing party is required to pay to the other party in respect of a claim
filed. In connection with rendering its decisions, the Board of Arbitration
shall adopt and follow the laws of the State of New York. To the extent
practical, decisions of the Board of Arbitration shall be rendered no more than
thirty (30) calendar days following commencement of proceedings with respect
thereto. The Board of Arbitration shall cause its written decision to be
delivered to all parties involved in the dispute. Any decision made by the Board
of Arbitration (either prior to or after the expiration of such thirty (30)
calendar day period) shall be final, binding and conclusive on the parties to
the dispute, and entitled to be enforced to the fullest extent permitted by law
and entered in any court of competent jurisdiction. The Board of Arbitration
shall be authorized and is hereby directed to enter a default judgment against
any party failing to participate in any proceeding hereunder within the time
periods set forth in the AAA rules. The non-prevailing party to any arbitration
(as determined by the Board of Arbitration) shall pay the expenses of the
prevailing party, including reasonable attorneys' fees, in connection with such
arbitration. Any party shall be entitled to obtain injunctive relief from a
court in any case where such relief is available. The non-prevailing party to
any injunctive proceeding (as determined by the court) shall pay the expenses of
the prevailing party, including reasonable attorney's fees, in connection with
such injunctive proceeding.

                                       11
<PAGE>   12

            IN WITNESS WHEREOF, the parties hereto have caused this Registration
Rights Agreement to be duly executed, on the day and year first above written.

                                     DENTAL/MEDICAL DIAGNOSTIC SYSTEMS, INC.

                                     By:  /s/  ROBERT H. GUREVITCH
                                        ----------------------------------------
                                        Robert H. Gurevitch, President

                                     INVESTORS:

                                     AMRO INTERNATIONAL, S.A.

                                     By:________________________________________
                                        H.U. Bachofen, Director

                                     ESQUIRE TRADE & FINANCE INC.

                                     By:________________________________________
                                        Roland Winiger, Authorized Signatory

                                     AUSTINVEST ANSTALT BALZERS

                                     By:________________________________________
                                        Dr. Walter Grill, Authorized Signatory

                                     LEVAL TRADING

                                     By:________________________________________
                                               , Authorized Signatory

                                     THE KESHET FUND, L.P.

                                     By:________________________________________
                                                , Authorized Signatory

                                       12

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