Document:

<PAGE>

                                 EXHIBIT 10.28

THIS WARRANT AND THE SECURITIES ISSUABLE UPON EXERCISE OF THIS WARRANT HAVE NOT
BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR APPLICABLE
STATE SECURITIES LAWS. THIS WARRANT AND THE SECURITIES ISSUABLE UPON EXERCISE OF
THIS WARRANT MAY NOT BE OFFERED FOR SALE, SOLD, TRANSFERRED OR ASSIGNED (I) IN
THE ABSENCE OF AN EFFECTIVE REGISTRATION STATEMENT FOR THE SECURITIES UNDER THE
SECURITIES ACT OF 1933, AS AMENDED, OR APPLICABLE STATE SECURITIES LAWS, OR AN
OPINION OF COUNSEL, IN A GENERALLY ACCEPTABLE FORM, THAT REGISTRATION IS NOT
REQUIRED UNDER SAID ACT OR APPLICABLE STATE SECURITIES LAWS OR (II) UNLESS SOLD
PURSUANT TO EITHER RULE 144A UNDER SAID ACT TO A QUALIFIED INSTITUTIONAL BUYER
OR RULE 144 UNDER SAID ACT. NOTWITHSTANDING THE FOREGOING, THE SECURITIES MAY BE
PLEDGED IN CONNECTION WITH A BONA FIDE MARGIN ACCOUNT OR OTHER LOAN SECURED BY
THE SECURITIES. COPIES OF THE AGREEMENT COVERING THE PURCHASE OF THESE
SECURITIES AND RESTRICTING THEIR TRANSFER OR SALE MAY BE OBTAINED AT NO COST BY
WRITTEN REQUEST MADE BY THE HOLDER OF RECORD HEREOF TO THE SECRETARY OF THE
COMPANY AT THE PRINCIPAL EXECUTIVE OFFICES OF THE COMPANY.

                       WARRANT TO PURCHASE COMMON STOCK
                                      of
                               BriteSmile, Inc.

Warrant No._____________                              Number of Shares:_________
Date of Issuance: June 29, 2000                               Void June 29, 2005

THIS CERTIFIES THAT, for value received, __________________________ (the
"Holder") is entitled, subject to the terms set forth below, to purchase from
BriteSmile, Inc., a Utah corporation (the "Company"), ______________ shares (the
"Shares") of the Company's Common Stock, par value $.001 per share (the "Common
Stock"). The warrant exercise price (the "Exercise Price") per share of Common
Stock shall be 140% of the Market Price (as defined below) of the Common Stock
as of June 28, 2000 (the "Pricing Date"). The number of Shares and the Exercise
Price are subject to adjustment as provided below. The term "Warrant" as used
herein shall include this Warrant and any warrants delivered in substitution or
exchange therefor as provided herein. "Market Price" shall mean, with respect to
any security, that price which shall be computed as the arithmetic average of
the Closing Bid Prices for such security during the ten (10) consecutive trading
days immediately preceding such date of determination as quoted on the Principal
Market or any other exchange or quotation service on which the security is then
listed or traded. This Warrant is issued in connection with that certain
Securities
<PAGE>

Purchase Agreement dated as of June 27, 2000 (the "Securities Purchase
Agreement"). Capitalized terms used but not specifically defined in this Warrant
shall have the meanings set forth in the Securities Purchase Agreement. The
terms "Closing Bid Price" and "Principal Market" shall have the meanings set
forth in the 5% Convertible Subordinated Notes due 2005 (the "Notes") issued
pursuant to the Securities Purchase Agreement.

     1.   Term of Warrant.
          ---------------

          a.   Except as otherwise provided herein, this Warrant shall be
exercisable, in whole or in part, during the term commencing on the date hereof
(the "Issuance Date") and ending at 5:00 p.m., Pacific Time, on June 29, 2005,
and shall be void thereafter.

     2.   Exercise Of Warrants.
          --------------------

          a.   Cash Exercise; Exercise Procedures. The purchase rights set forth
               ----------------------------------
in this Warrant are exercisable by the Holder, in whole or in part, at any time,
or from time to time commencing on the Issuance Date, prior to the expiration of
the term set forth in Section 1 above, by the tender to the Company at its
principal office of a notice of exercise in the form attached hereto as Exhibit
                                                                        -------
A (the "Notice of Exercise"), duly completed and executed on behalf of the
-
Holder and the payment to the Company by certified, cashier's or other check
acceptable to the Company or by wire transfer of immediately available funds to
such account as may be designated by the Company, of the aggregate Exercise
Price of the Shares being purchased (the "Aggregate Exercise Price") or by
notifying the Company that this Warrant is being exercised pursuant to a
Cashless Exercise (as defined below in Section 2(c)). In the event of any
exercise of the rights represented by this Warrant in compliance with this
Section 2(a), the Company shall on the second (2nd) Business Day (the "Share
Delivery Date") following the date of its receipt of the Notice of Exercise and
the Aggregate Exercise Price (or notice of Cashless Exercise) (the "Exercise
Delivery Documents"), (A) provided the Company's transfer agent is participating
in The Depository Trust Company ("DTC") Fast Automated Securities Transfer
Program and provided that the holder is eligible to receive shares through DTC,
credit such aggregate number of shares of Common Stock to which the holder shall
be entitled to the holder's or its designee's balance account with DTC through
its Deposit Withdrawal Agent Commission system or (B) issue and deliver to the
address as specified in the Exercise Delivery Documents, a certificate,
registered in the name of the holder or its designee, for the number of shares
of Common Stock to which the holder shall be entitled. Upon delivery of the
Notice of Exercise and Aggregate Exercise Price referred to in clause (ii)(A)
above or notification to the Company of a Cashless Exercise referred to in
Section 2(e), the holder of this Warrant shall be deemed for all corporate
purposes to have become the holder of record of the Shares with respect to which
this Warrant has been exercised, irrespective of the date of delivery of this
Warrant as required by clause (iii) above or the certificates evidencing such
Shares. In the case of a dispute as to the determination of the Exercise Price,
the Market Price of a security or the arithmetic calculation of the number of
Shares, the Company shall

                                       2
<PAGE>

promptly issue to the holder the number of shares of Common Stock that is not
disputed and shall submit the disputed determinations or arithmetic calculations
to the holder via facsimile within one (1) Business Day of receipt of the
Exercise Delivery Documents. If the holder and the Company are unable to agree
upon the determination of the Exercise Price, the Market Price or arithmetic
calculation of the number of Shares within one (1) Business Day of such disputed
determination or arithmetic calculation being submitted to the holder, then the
Company shall immediately submit via facsimile (i) the disputed determination of
the Exercise Price or the Market Price to an independent, reputable investment
banking firm or (ii) the disputed arithmetic calculation of the number of Shares
to its independent, outside accountant. The Company shall cause the investment
banking firm or the accountant, as the case may be, to perform the
determinations or calculations and notify the Company and the holder of the
results no later than two (2) Business Days from the time it receives the
disputed determinations or calculations. Such investment banking firm's or
accountant's determination or calculation, as the case may be, shall be deemed
conclusive absent manifest error.

          b.   Failure to Deliver Certificates. If the Company shall fail for
               -------------------------------
any reason or for no reason to issue to the holder, within three (3) Business
Days of receipt of the Exercise Delivery Documents, a certificate for the number
of shares of Common Stock to which the holder is entitled or to credit the
holder's balance account with DTC for such number of shares of Common Stock to
which the holder is entitled upon the holder's exercise of this Warrant, the
Company shall, in addition to any other remedies under this Warrant or the
Securities Purchase Agreement or otherwise available to such holder, including
any indemnification under Section 3.18 of the Securities Purchase Agreement, pay
as additional damages in cash to such holder on each day after the Share
Delivery Date such exercise is not timely effected in an amount equal to 0.5% of
the product of (I) the sum of the number of shares of Common Stock not issued to
the holder on or prior to the Share Delivery Date and to which such holder is
entitled and (II) the Closing Bid Price of the Common Stock on the Share
Delivery Date.

          c.   Cashless Exercise. Notwithstanding the payment provisions set
               -----------------
forth in Section 2(a) above, if the Shares to be issued upon exercise of this
Warrant are not registered and available for resale pursuant to a registration
statement in accordance with the Registration Rights Agreement between the
Company and the Holder, dated June 27, 2000, the Holder may elect to receive
Shares equal to the value of this Warrant (or of any portion thereof remaining
unexercised) by surrender of this Warrant at the principal office of the Company
together with the properly endorsed Notice of Exercise and notice of such
election, in which event the Company shall issue to the Holder that number of
Shares computed using the following formula ("Cashless Exercise"):

                                 X =    Y(A-B)
                                       --------
                                          A
          Where:

          X =  the number of Shares to be issued to the Holder;

                                       3
<PAGE>

          Y =  the number of Shares purchasable under this Warrant or, if only a
               portion of the Warrant is being exercised, the portion of the
               Warrant being exercised;
          A =  the Market Price of one share of the Shares (at the date of such
               exercise); and
          B =  the Exercise Price (as adjusted to the date of such
               calculation).

          d.   Exercise at Option of Company. At any time from and after the
               -----------------------------
second anniversary of the Issuance Date, provided that the Conditions to
Company's Exercise Option (as defined below) are satisfied as of the Company's
Exercise Option Date (as defined below), the Company shall have the right to
elect to have the Holder exercise all or any portion of this Warrant then
unexercised (the "Company's Exercise Option"), provided that the Closing Bid
Price of the Common Stock shall be at least two hundred percent (200%) of an
amount equal to the product of (A) 150% and (B) the Market Price of the Common
Stock on the Pricing Date for at least fifteen (15) out of any twenty (20)
consecutive trading days (each rolling 20-day period referred to hereafter as a.
"Company's Exercise Option Measuring Period"). The Company shall exercise the
Company's Exercise Option, if at all, by providing each holder of Warrants
written notice ("Company's Exercise Election Notice") by facsimile and overnight
courier within two (2) trading days after the last day of any Company's Exercise
Option Measuring Period. The date on which each of such holders of the Warrants
actually receives the Company's Exercise Election Notice is referred to herein
as the "Company's Exercise Election Notice Date." If the Company elects to
require the exercise of some, but not all, of the Warrants then outstanding, the
Company shall require exercise of an amount from each holder of such Warrants
equal to the product of (I) the total number of Warrants which the Company has
elected to exercise multiplied by (II) a fraction, the numerator of which is the
number of Warrants initially purchased by such holder and the denominator of
which is the total number of Warrants purchased on the Date of Issuance (such
fraction with respect to each holder being referred to as its "Allocation
Percentage", and such amount with respect to each holder being referred to
herein as its "Pro Rata Exercise Amount"). In the event that any initial holder
of the Warrants shall sell or otherwise transfer any of such holder's Warrants,
the transferee shall be allocated a pro rata portion of such holder's Allocation
Percentage. The Company's Exercise Election Notice shall indicate (x) the
aggregate number of such Warrants the Company has selected for exercise, (y) the
date selected by the Company for exercise ("Company's Election Exercise Date"),
which date shall be not less than twenty (20) Business Days or more than sixty
(60) Business Days after the Company's Exercise Election Notice Date, and (z)
each holder's Pro Rata Exercise Amount. Subject to the satisfaction of all the
conditions of this Section 2(d) except to the extent restricted by Section 2(g),
on the Company's Election Exercise Date each holder of Warrants selected for
exercise will be deemed to have submitted an Exercise Notice in accordance with
Section 2(a) for a number of Warrants equal to the result of (a) such holder's
Pro Rata Exercise Amount, minus (b) the number of such Warrants converted by
such holder during the Company's Mandatory Exercise Period. "Company's Mandatory
Exercise Period" means, with respect to any Company's Exercise Election, the
period beginning on and including the Company's Exercise Election Notice Date
and ending on and including the Company's Election

                                       4
<PAGE>

Exercise Date. "Conditions to Company's Exercise Option" means the following
conditions: (i) during the period beginning on the Issuance Date and ending on
and including the Company's Election Exercise Date, the Company shall have
delivered all shares of Common Stock issuable upon conversion of the Notes to
the holders of the Notes, and all shares of Common Stock issuable upon exercise
of the Warrants, on a timely basis as set forth in the Notes and in this
Warrant; (ii) on each day during the period beginning on and including the date
the Registration Statement is declared effective by the SEC and ending on and
including the Company's Election Exercise Date, the Registration Statement shall
be effective and available for the sale of at least all of the Registrable
Securities (as defined in the Registration Rights Agreement); (iii) on each day
during the period beginning on the Issuance Date and ending on and including the
Company's Election Exercise Date, the Common Stock is designated for quotation
on the Nasdaq National Market or listed on The New York Stock Exchange, is not
suspended from trading and neither delisting nor suspension by such exchange or
market shall have been threatened either (A) in writing by such exchange or
market or (B) by falling below the minimum listing maintenance requirements of
such exchange or market; (iv) during the period beginning on the Issuance Date
and ending on and including the Company's Election Exercise Date, there shall
not have occurred a Triggering Event (as defined in the Notes) or an event that
with the passage of time and without being cured would constitute a Triggering
Event; (v) during the period beginning on the Issuance Date and ending on and
including the Company's Exercise Option Date, there shall not have occurred the
consummation of a Change of Control (as defined in the Notes) or the public
announcement of a pending, proposed or intended Change of Control which has not
been terminated; (vi) on the earlier to occur of (A) the Shareholder Meeting
Deadline (as defined in the Securities Purchase Agreement) and (B) the date on
which the Company holds its first meeting of shareholders after the Issuance
Date, the Company shall have received the Shareholder Approval (as defined in
the Securities Purchase Agreement); (vii) on each trading day during the
Company's Mandatory Exercise Period, the Closing Bid Price of the Common Stock
shall be at least two hundred percent (200%) of an amount equal to the product
of (A) 150% and (B) the Market Price of the Common Stock on the Pricing Date;
and (viii) the Company otherwise has satisfied its obligations in all material
respects and is not in default in any material respect under this Warrant, the
Securities Purchase Agreement, the Notes and the Registration Rights Agreement.

          d.   Stock Certificates. This Warrant shall be deemed to have been
               ------------------
exercised immediately prior to the close of business on the date of its tender
for exercise as provided above, or in the case of the Company's exercise of the
Company's Exercise Option, on the day prior to the Company's receipt of the
payment specified in the Company's Exercise Notice, and the persons entitled to
receive the Shares issuable upon such exercise shall be treated for all purposes
as the holder of record of such Shares as of the close of business on such date.
As promptly as practicable on or after such date and in any event within ten
(10) days thereafter, the Company, at its expense, shall deliver to the person
or persons entitled to receive the same a certificate or certificates for that
number of shares issuable upon such exercise. In the event that this Warrant is
exercised in part, the Company shall, at its expense, execute and deliver a new
Warrant with the same terms and conditions for the number of Shares that remain
subject to this Warrant.

                                       5
<PAGE>

          e.   Taxes. The issuance of the Shares upon the exercise of this
               -----
Warrant, and the delivery of certificates or other instruments representing such
Shares, shall be made without charge to the Holder for any tax or other charge
in respect of such issuance. The Company shall not, however, be required to pay
any tax which may be payable in respect of any transfer involved in the issue
and delivery of any certificate in a name other than that of the Holder and the
Company shall not be required to issue or deliver any such certificate unless
and until the person or persons requesting the issue thereof shall have paid to
the Company the amount of such tax or shall have established to the satisfaction
of the Company that such tax has been paid.

     3.   No Fractional Shares or Scrip. No fractional shares or scrip
          -----------------------------
representing fractional shares shall be issued upon the exercise of this
Warrant. In lieu of such fractional share to which the Holder would otherwise be
entitled, the Company shall make a cash payment equal to the Exercise Price
multiplied by such fraction.

     4.   No Rights As Shareholders. This Warrant does not entitle the Holder to
          -------------------------
any voting right or other rights as a shareholder of the Company prior to the
exercise of the Holder's rights to purchase the Shares as provided for herein.

     5.   Transfer of Warrants.
          --------------------

          a.   Warrant Register. The Company shall maintain a register (the
               ----------------
"Warrant Register") containing the names and addresses of the Holder or Holders.
Any Holder of this Warrant or any portion thereof may change its address as
shown on the Warrant Register by written notice to the Company requesting such
change. Any notice or written communication required or permitted to be given to
the Holder may be delivered or given by mail to such Holder as shown on the
Warrant Register and at the address shown on the Warrant Register. Until this
Warrant is transferred on the Warrant Register, the Company may treat the Holder
as shown on the Warrant Register as the absolute owner of this Warrant for all
purposes, notwithstanding any notice to the contrary.

          b.   Transferability and Non-negotiability of Warrant. This Warrant
               ------------------------------------------------
may not be transferred or assigned in whole or in part without compliance with
all applicable federal and state securities laws by the transferor and the
transferee (including the delivery of investment representation letters and
legal opinions reasonably satisfactory to the Company, if such are requested by
the Company); provided, however, that this Warrant may be assigned by the Holder
to any person or entity affiliated with or established by the Holder. Subject to
the provisions of this Warrant with respect to compliance with the Securities
Act of 1933, as amended (the "Securities Act"), title to this Warrant may be
transferred by endorsement (by the Holder executing the assignment form (the
"Assignment Form") attached hereto as Exhibit B) and delivery in the same manner
                                      ---------
as a negotiable instrument transferable by endorsement and delivery.

                                       6
<PAGE>

          c.   Exchange of Warrant Upon a Transfer. On surrender of this Warrant
               -----------------------------------
for exchange, properly endorsed on the Assignment Form and subject to the
provisions of this Warrant with respect to compliance with the Securities Act
and with the limitations on assignments and transfers contained in this Section
5, the Company, at its expense, shall issue to or on the order of the Holder a
new warrant or warrants with the same terms and conditions, in the name of the
Holder or as the Holder (on payment by the Holder of any applicable transfer
taxes) may direct, for the number of shares issuable upon exercise thereof.

          d.   Compliance with Securities Laws.
               -------------------------------

               (i)  The Holder of this Warrant, by acceptance hereof,
acknowledges that this Warrant and the Shares to be issued upon exercise hereof
are being acquired solely for the Holder's own account and not as a nominee for
any other party, and for investment, and that the Holder will not offer, sell or
otherwise dispose of this Warrant or any Shares to be issued upon exercise
hereof except under circumstances that will not result in a violation of the
Securities Act or any state securities laws. Upon exercise of this Warrant,
whether by the Holder or by the Company, the Holder shall, if requested by the
Company, confirm in writing, in a form satisfactory to the Company, that the
Shares so purchased are being acquired solely for the Holder's own account and
not as a nominee for any other party, for investment, and not with a view toward
distribution or resale; provided, however, that the Holder shall be able to
transfer such Warrant or Shares (x) as provided in subparagraph (b) above and
(y) in such other transactions as may be effected without registration pursuant
to the Securities Act or qualification pursuant to any relevant state securities
laws and shall confirm such other matters related thereto as may be reasonably
requested by the Company.

               (ii) This Warrant and all Shares issued upon exercise hereof or
conversion thereof shall be stamped or imprinted with a legend in substantially
the following form:

     THIS WARRANT AND THE SECURITIES ISSUABLE UPON EXERCISE OF THIS
     WARRANT HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS
     AMENDED, OR APPLICABLE STATE SECURITIES LAWS. THIS WARRANT AND THE
     SECURITIES ISSUABLE UPON EXERCISE OF THIS WARRANT MAY NOT BE OFFERED
     FOR SALE, SOLD, TRANSFERRED OR ASSIGNED (I) IN THE ABSENCE OF AN
     EFFECTIVE REGISTRATION STATEMENT FOR THE SECURITIES UNDER THE
     SECURITIES ACT OF 1933, AS AMENDED, OR APPLICABLE STATE SECURITIES
     LAWS, OR AN OPINION OF COUNSEL, IN A GENERALLY ACCEPTABLE FORM, THAT
     REGISTRATION IS NOT REQUIRED UNDER SAID ACT OR APPLICABLE STATE
     SECURITIES LAWS OR (II) UNLESS SOLD PURSUANT TO EITHER RULE 144A
     UNDER SAID ACT TO A QUALIFIED

                                       7
<PAGE>

     INSTITUTIONAL BUYER OR RULE 144 UNDER SAID ACT. NOTWITHSTANDING THE
     FOREGOING, THE SECURITIES MAY BE PLEDGED IN CONNECTION WITH A BONA
     FIDE MARGIN ACCOUNT OR OTHER LOAN SECURED BY THE SECURITIES. COPIES
     OF THE AGREEMENT COVERING THE PURCHASE OF THESE SECURITIES AND
     RESTRICTING THEIR TRANSFER OR SALE MAY BE OBTAINED AT NO COST BY
     WRITTEN REQUEST MADE BY THE HOLDER OF RECORD HEREOF TO THE SECRETARY
     OF THE COMPANY AT THE PRINCIPAL EXECUTIVE OFFICES OF THE COMPANY.

     6.   Representations and Warranties by the Holder. The Holder represents
          --------------------------------------------
and warrants to the Company as follows:

          a.   Investment Intent. Such Holder is acquiring this Warrant, and
               -----------------
upon exercise of this Warrant, will acquire the Shares, for its own account for
investment only and not with a view towards, or for resale in connection with,
the public sale or distribution thereof, except pursuant to sales registered or
exempted under the Securities Act; provided, however, that by making the
representations contained in this Section 6(a), such Holder does not agree to
hold this Warrant or any of the Shares for any minimum or other specific term
and reserves the right to dispose of this Warrant or the Shares at any time in
accordance with or to the extent allowed by this Warrant, the Registration
Rights Agreement, and the Securities Act.

          b.   Accredited Status. As of the date hereof and as of the date of
               -----------------
any exercise of this Warrant, such Holder is and will be, an "accredited
investor" as defined in Rule 501(a) under the Securities Act.

          c.   Financial Risk. The Holder has such knowledge and experience in
               --------------
financial and business matters as to be capable of evaluating the merits and
risks of the Holder's investment and has the ability to bear the economic risks
of the Holder's investment.

          d.   Risk of No Registration. The Holder understands that if the
               -----------------------
Company's Common Stock ceases to be registered with the Securities and Exchange
Commission pursuant to Section 12 of the Securities Exchange Act of 1934, as
amended (the "Exchange Act"), or if the Company ceases to file the reports
required under the Exchange Act, or if a registration statement covering the
securities under the Securities Act is not in effect when the Holder desires to
resell (i) this Warrant or (ii) the Shares issuable upon exercise of this
Warrant, the Holder may be required to hold such securities for an indefinite
period. The Holder is aware of the provisions of Rule 144 promulgated under the
Securities Act.

          e.   Transfer or Resale. Such Holder understands that except as
               ------------------
provided in the Registration Rights Agreement: (i) this Warrant and the Shares
have not been and are not being registered under the Securities Act or any state
securities laws,

                                       8
<PAGE>

and may not be offered for sale, sold, assigned or transferred unless (A)
subsequently registered under the Securities Act and applicable state securities
laws, (B) such Holder shall have delivered to the Company an opinion of counsel,
in a generally acceptable form, to the effect that such securities to be sold,
assigned or transferred may be sold, assigned or transferred pursuant to an
exemption from such registration, (C) such Holder provides the Company with
reasonable assurance that such securities can be sold, assigned or transferred
pursuant to Rule 144 promulgated under the Securities Act (or a successor rule
thereto) ("Rule 144") or (D) transferred in accordance with Rule 144A under the
Securities Act (or any successor rule thereto) ("Rule 144A") to a qualified
institutional buyer (as such term is defined in Rule 144A); (ii) any sale of
this Warrant or the Shares made in reliance on Rule 144 may be made only in
accordance with the terms of Rule 144 and further, if Rule 144 is not
applicable, any resale of such securities under circumstances in which the
seller (or the person through whom the sale is made) may be deemed to be an
underwriter (as that term is defined in the Securities Act) may require
compliance with some other exemption under the Securities Act or the rules and
regulations of the SEC thereunder; and (iii) neither the Company nor any other
person is under any obligation to register such securities under the Securities
Act or any state securities laws or to comply with the terms and conditions of
any exemption thereunder. Notwithstanding the foregoing, this Warrant and the
Shares may be pledged in connection with a bona fide margin account or other
loan secured by the Securities.

     7.   Reservation of Stock. The Company covenants that during the term this
          --------------------
Warrant is exercisable, the Company will reserve from its authorized and
unissued Common Stock a sufficient number of shares to provide for the issuance
of the Shares upon the exercise of this Warrant and, from time to time, will
take all steps necessary to amend its Articles of Incorporation (the "Articles")
to provide sufficient reserves of shares of Common Stock issuable upon exercise
of the Warrant. The Company further covenants that all Shares that may be issued
upon the exercise of rights represented by this Warrant and payment of the
Exercise Price, all as set forth herein, will be free from all taxes, liens and
charges in respect of the issue thereof (other than taxes in respect of any
transfer occurring contemporaneously or otherwise specified herein). The Company
agrees that its issuance of this Warrant shall constitute full authority of its
officers who are charged with the duty of executing stock certificates to
execute and issue the necessary certificates for the Shares upon the exercise of
this Warrant.

     8.   Adjustment Rights.   The Exercise Price and the number of shares
          -----------------
purchasable hereunder are subject to adjustment from time to time, as follows:

          a.   Adjustment of Exercise Price upon Issuance of Common Stock. If
               ----------------------------------------------------------
and whenever on or after the date of issuance of this Warrant, the Company
issues or sells, or in accordance with this Section 8(a) is deemed to have
issued or sold, any shares of Common Stock (including the issuance or sale of
shares of Common Stock owned or held by or for the account of the Company, but
excluding but excluding (A) shares of Common Stock deemed to have been issued by
the Company in connection with an Approved Stock Plan, (B) shares of Common
Stock issued upon conversion of the Notes or exercise of the Warrants, (C)
shares of Common Stock issued upon the conversion or

                                       9
<PAGE>

exercise of any options or warrants issued other than under an Approved Stock
Plan outstanding as of the date hereof provided the terms of such securities are
not amended after the date hereof, or (D) up to 1,250,000 shares of Common Stock
issued at a purchase price of not less than $4.00 per share in connection with
any strategic partnership or joint venture (the primary purpose of which is not
to raise equity capital) with any entity whose primary business is not investing
or advising other entities) for a consideration per share less than a price (the
"Applicable Price") equal to the Exercise Price in effect immediately prior to
such time, then immediately after such issue or sale, the Exercise Price then in
effect shall be reduced to an amount equal to the consideration, if any,
received by the Company upon such issue or sale. "Approved Stock Plan" means any
employee benefit plan which has been approved by the Board of Directors of the
Company, pursuant to which the Company's securities may be issued to any
employee, officer or director for services provided to the Company. For purposes
of determining the adjusted Exercise Price under this Section 8(a), the
following shall be applicable:

               (i)  Issuance of Options. If the Company in any manner grants or
                    -------------------
sells any Options and the lowest price per share for which one share of Common
Stock is issuable upon the exercise of any such Option or upon conversion,
exchange or exercise of any Convertible Securities issuable upon exercise of
such Option is less than the Applicable Price, then such share of Common Stock
shall be deemed to be outstanding and to have been issued and sold by the
Company at the time of the granting or sale of such Option for such price per
share. For purposes of this Section 8(a)(i), the "lowest price per share for
which one share of Common Stock is issuable upon the exercise of any such Option
or upon conversion, exchange or exercise of any Convertible Securities issuable
upon exercise of such Option" shall be equal to the sum of the lowest amounts of
consideration (if any) received or receivable by the Company with respect to any
one share of Common Stock upon granting or sale of the Option, upon exercise of
the Option and upon conversion, exchange or exercise of any Convertible Security
issuable upon exercise of such Option. No further adjustment of the Exercise
Price shall be made upon the actual issuance of such Common Stock or of such
Convertible Securities upon the exercise of such Options or upon the actual
issuance of such Common Stock upon conversion, exchange or exercise of such
Convertible Securities.

               (ii) Issuance of Convertible Securities. If the Company in any
                    ----------------------------------
manner issues or sells any Convertible Securities and the lowest price per share
for which one share of Common Stock is issuable upon such conversion, exchange
or exercise thereof is less than the Applicable Price, then such share of Common
Stock shall be deemed to be outstanding and to have been issued and sold by the
Company at the time of the issuance of sale of such Convertible Securities for
such price per share. For the purposes of this Section 8(a)(ii), the "1owest
price per share for which one share of Common Stock is issuable upon such
conversion, exchange or exercise" shall be equal to the sum of the lowest
amounts of consideration (if any) received or receivable by the Company with
respect to any one share of Common Stock upon the issuance or sale of the
Convertible Security and upon the conversion, exchange or exercise of such

                                       10
<PAGE>

Convertible Securities, and if any such issue or sale of such Convertible
Securities is made upon exercise of any Options for which adjustment of the
Exercise Price had been or are to be made pursuant to other provisions of this
Section 8(a), no further adjustment of the Exercise Price shall be made by
reason of such issue or sale.

          (iii) Change in Option Price or Rate of Conversion. If the purchase or
                --------------------------------------------
exercise price provided for in any Options, the additional consideration, if
any, payable upon the issue, conversion, exchange or exercise of any Convertible
Securities, or the rate at which any Convertible Securities are convertible into
or exchangeable or exercisable for Common Stock changes at any time, the
Exercise Price in effect at the time of such change shall be adjusted to the
Exercise Price which would have been in effect at such time had such Options or
Convertible Securities provided for such changed purchase price, additional
consideration or changed conversion rate, as the case may be, at the time
initially granted, issued or sold. For purposes of this Section 8(a)(iii), if
the terms of any Option or Convertible Security that was outstanding as of the
date of issuance of the Notes are changed in the manner described in the
immediately preceding sentence, then such Option or Convertible Security and the
Common Stock deemed issuable upon exercise, conversion or exchange thereof shall
be deemed to have been issued as of the date of such change. No adjustment shall
be made if such adjustment would result in an increase of the Exercise Price
then in effect.

          (iv)  Calculation of Consideration Received. In case any Option is
                -------------------------------------
issued in connection with the issue or sale of other securities of the Company,
together comprising one integrated transaction in which no specific
consideration is allocated to such Options by the parties thereto, the Options
will be deemed to have been issued for a consideration of $0.01. If any Common
Stock, Options or Convertible Securities are issued or sold or deemed to have
been issued or sold for cash, the consideration received therefor will be deemed
to be the gross amount received by the Company therefor, less expenses in excess
of five percent (5%) of the gross amount received. If any Common Stock, Options
or Convertible Securities are issued or sold for a consideration other than
cash, the amount of the consideration other than cash received by the Company
will be the fair value of such consideration, except where such consideration
consists of marketable securities, in which case the amount of consideration
received by the Company will be the arithmetic average of the closing bid prices
of such securities during the ten (10) consecutive trading days ending on the
date of receipt of such securities. If any Common Stock, Options or Convertible
Securities are issued to the owners of the non-surviving entity in connection
with any merger in which the Company is the surviving entity, the amount of
consideration therefor will be deemed to be the fair value of such portion of
the net assets and business of the non-surviving entity as is attributable  to
such Common Stock, Options or Convertible Securities, as the case may be. The
fair value of any consideration other than cash or securities will be determined
jointly by the Company and the holders of the Warrants. If such parties are
unable to reach agreement within ten (10) days after the occurrence of an event
requiring valuation (the "Valuation Event"), the fair value of such
consideration will be determined within five (5) Business Days after the tenth
(10th) day following the Valuation Event by an independent, reputable appraiser
agreed to by the Company and the holders of a majority of the

                                       11
<PAGE>

principal amount of the Notes on or prior to the Issuance Date. The
determination of such appraiser shall be deemed binding upon all parties absent
manifest error and the fees and expenses of such appraiser shall be borne by the
Company.

          (v)   Record Date. If the Company takes a record of the holders of
                -----------
Common Stock for the purpose of entitling them (1) to receive a dividend or
other distribution payable in Common Stock, Options or Convertible Securities,
or (2) to subscribe for or purchase Common Stock, Options or Convertible
Securities, then such record date will be deemed to be the date of the issue or
sale of the shares of Common Stock deemed to have been issued or sold upon the
declaration of such dividend or the making of such other distribution or the
date of the granting of such right of subscription or purchase, as the case may
be.

     b.   Adjustment of Exercise Price Upon Subdivision or Combination of
          ---------------------------------------------------------------
Common Stock.  If the Company at any time subdivides (by any stock split, stock
------------
dividend, recapitalization or otherwise) one or more classes of its outstanding
shares of Common Stock into a greater number of shares, the Exercise Price in
effect immediately prior to such subdivision will be proportionately reduced and
the number of shares of Common Stock obtainable upon exercise of this Warrant
will be proportionately increased. If the Company at any time combines (by
combination, reverse stock split or otherwise) one or more classes of its
outstanding shares of Common Stock into a smaller number of shares, the Exercise
Price in effect immediately prior to such combination will be proportionately
increased and the number of shares of Common Stock obtainable upon exercise of
this Warrant will be proportionately decreased.

     c.   Distribution of Assets.  If the Company shall declare or make any
          ----------------------
dividend or other distribution of its assets (or rights to acquire its assets)
to holders of Common Stock, by way of return of capital or otherwise (including,
without limitation, any distribution of cash, stock or other securities,
property or options by way of a dividend, spin off, reclassification, corporate
rearrangement or other similar transaction) (a "Distribution"), at any time
after the issuance of this Warrant, then, in each such case:

          (i)   the Exercise Price in effect immediately prior to the close of
business on the record date fixed for the determination of holders of Common
Stock entitled to receive the Distribution shall be reduced, effective as of the
close of business on such record date, to a price determined by multiplying such
Exercise Price by a fraction of which (A) the numerator shall be the Closing Bid
Price of the Common Stock on the trading day immediately preceding such record
date minus the value of the Distribution (as determined in good faith by the
Company's Board of Directors) applicable to one share of Common Stock, and (B)
the denominator shall be the Closing Bid Price of the Common Stock on the
trading day immediately preceding such record date; and

          (ii)  either (A) the number of Warrant Shares obtainable upon exercise
of this Warrant shall be increased to a number of shares equal to the number of
shares of Common Stock obtainable immediately prior to the close of business on
the

                                       12
<PAGE>

record date fixed for the determination of holders of Common Stock entitled to
receive the Distribution multiplied by the reciprocal of the fraction set forth
in the immediately preceding clause (i), or (B) in the event that the
Distribution is of common stock of a company whose common stock is traded on a
national securities exchange or a national automated quotation system, then the
holder of this Warrant shall receive an additional warrant to purchase Common
Stock, the terms of which shall be identical to those of this Warrant, except
that such warrant shall be exercisable into the amount of the assets that would
have been payable to the holder of this Warrant pursuant to the Distribution had
the holder exercised this Warrant immediately prior to such record date and with
an exercise price equal to the amount by which the exercise price of this
Warrant was decreased with respect to the Distribution pursuant to the terms of
the immediately preceding clause (i).

          d.   Other Events. If any event occurs of the type contemplated by the
               ------------
provisions of this Section 8 but not expressly provided for by such provisions
(including, without limitation, the granting of stock appreciation rights,
phantom stock rights or other rights with equity features), then the Company's
Board of Directors will make an appropriate adjustment in the Exercise Price so
as to protect the rights of the holders of the Warrants; provided that no such
adjustment will increase the Exercise Price as otherwise determined pursuant to
this Section 8.

          e.   Notices.
               -------

               (i)   Immediately upon any adjustment of the Exercise Price, the
Company will give written notice thereof to the holder of this Warrant setting
forth in reasonable detail, and certifying, the calculation of such adjustment.

               (ii)  The Company will give written notice to each holder of the
Warrants at least ten (10) Business Days prior to the date on which the Company
closes its books or takes a record (I) with respect to any dividend or
distribution upon the Common Stock, (II) with respect to any pro rata
subscription offer to holders of Common Stock or (III) for determining rights to
vote with respect to any Organic Change (as defined in Section 9(b)),
dissolution or liquidation, provided that such information shall be made known
to the public prior to or in conjunction with such notice being provided to such
holder.

               (iii) The Company will also give written notice to each holder of
this Warrant at least ten (10) Business Days prior to the date on which any
Organic Change, dissolution or liquidation will take place, provided that such
information shall be made known to the public prior to or in conjunction with
such notice being provided to such holder.

     9.   Purchase Rights; Reorganization, Reclassification, Consolidation,
          -----------------------------------------------------------------
Merger or Sale.
--------------

                                       13
<PAGE>

          a.   In addition to any adjustments pursuant to Section 8 above, if at
any time the Company grants, issues or sells any Options, convertible securities
or rights to purchase stock, warrants, securities or other property pro rata to
all of the record holders of any class of Common Stock (the "Purchase Rights"),
then the holder of this Warrant will be entitled to acquire, upon the terms
applicable to such Purchase Rights, the aggregate Purchase Rights which such
holder could have acquired if such holder had held the number of shares of
Common Stock acquirable upon complete exercise of this Warrant immediately
before the date on which a record is taken for the grant, issuance or sale of
such Purchase Rights, or, if no such record is taken, the date as of which the
record holders of Common Stock are to be determined for the grant, issue or sale
of such Purchase Rights.

          b.   Any recapitalization, reorganization, reclassification,
consolidation, merger, sale of all or substantially all of the Company's assets
to any individual, limited liability company, partnership, joint venture,
corporation, trust, unincorporated organization or government or any department
or agency thereof (each, a "Person") or other transaction which is effected in
such a way that holders of Common Stock are entitled to receive (either directly
or upon subsequent liquidation) stock, securities or assets with respect to or
in exchange for Common Stock is referred to herein as "Organic Change." Prior to
the consummation of any (i) sale of all or substantially all of the Company's
assets to an acquiring Person or (ii) other Organic Change following which the
Company is not a surviving entity, the Company will secure from the Person
purchasing such assets or the successor resulting from such Organic Change (in
each case, the "Acquiring Entity") written acknowledgment (in form and substance
satisfactory to the holders of Warrants representing two thirds (2/3) of the
shares of Common Stock obtainable upon exercise of the Warrants then
outstanding) to deliver to each holder of Warrants in exchange for such
Warrants, a security of the Acquiring Entity evidenced by a written instrument
substantially similar in form and substance to this Warrant and satisfactory to
the holders of the Warrants (including, an adjusted warrant exercise price equal
to the value for the Common Stock reflected by the terms of such consolidation,
merger or sale, and exercisable for a corresponding number of shares of Common
Stock acquirable and receivable upon exercise of the Warrants (without regard to
any limitations on exercises), if the value so reflected is less than the
Exercise Price in effect immediately prior to such consolidation, merger or
sale). Prior to the consummation of any other Organic Change, the Company shall
make appropriate provision (in form and substance reasonably satisfactory to the
holders of the Warrants representing at least two-thirds (2/3) of the shares of
Common Stock obtainable upon exercise of the Warrants then outstanding) to
insure that each of the holders of the Warrants will thereafter have the right
to acquire and receive in lieu of or in addition to (as the case may be) the
shares of Common Stock immediately theretofore acquirable and receivable upon
the exercise of such holder's Warrants (without regard to any limitations on
exercises), such shares of stock, securities or assets that would have been
issued or payable in such Organic Change with respect to or in exchange for the
number of shares of Common Stock which would have been acquirable and receivable
upon the exercise of such holder's Warrant as of the date of such Organic Change
(without taking into account any limitations or restrictions on the
exerciseability of this Warrant).

                                       14
<PAGE>

     10.  Limitation on Number of Shares.  The Company shall not be obligated to
          ------------------------------
issue any Shares upon exercise of this Warrant if the issuance of such shares of
Common Stock would cause the Company to exceed that number of shares of Common
Stock which the Company may issue upon exercise of this Warrant (the "Exchange
Cap") without breaching the Company's obligations under the rules or regulations
of the Principal Market, except that such limitation shall not apply in the
event that the Company (a) obtains the approval of its stockholders as required
by the Principal Market (or any successor rule or regulation) for issuances of
Common Stock in excess of such amount or (b) obtains a written opinion from
outside counsel to the Company that such approval is not required, which opinion
shall be reasonably satisfactory to the holders of Warrants representing at
least two-thirds (2/3) of the Shares then issuable upon exercise of outstanding
Warrants.  Until such approval or written opinion is obtained, the holder of
this Warrant shall not be issued, upon exercise of this Warrant, Shares in an
amount greater than such holder's Cap Allocation Amount (as defined in the
Notes).  In the event the Company is prohibited from issuing Warrant Shares as a
result of the operation of this Section 10, the Company shall redeem for cash
those Shares which can not be issued, at a price equal to the difference between
the Closing Bid Price of the Common Stock and the Exercise Price of such Shares
as of the date of the attempted exercise.

     11.  Miscellaneous.
          -------------

          a.   Effective Date. The provisions of this Warrant shall be construed
               --------------
and shall be given effect in all respects as if it had been executed and
delivered by the Company on the Issuance Date hereof. This Warrant shall be
binding upon any successors or assigns of the Company.

          b.   Attorneys' Fees.  In any litigation, arbitration or court
               ---------------
proceeding between the Company and the Holder relating hereto, the prevailing
party shall be entitled to attorneys' fees and expenses and all costs of
proceedings incurred in enforcing this Warrant.

          c.   Governing Law. This Warrant shall be governed by and construed
               -------------
for all purposes under and in accordance with the laws of the State of New York,
without regard to conflicts of law principles.

          d.   Titles and Subtitles. The titles of the paragraphs and
               --------------------
subparagraphs of this Warrant are for convenience and are not to be considered
in construing this Agreement.

          e.   Notices. Any notice required or permitted hereunder shall be
               -------
given in writing and shall be deemed effectively given upon personal delivery or
upon deposit in the United States mail, by registered or certified mail,
addressed (i) to the Holder at the address set forth on the signature page
hereof, and (ii) to the Company at 490 North Wiget Lane, Walnut Creek,
California  94598, Attn: Paul A. Boyer, Chief Financial

                                       15
<PAGE>

Officer, or at such other address as any such party may subsequently designate
by written notice to the other party.

          f.   Survival. The representations, warranties, covenants and
               --------
conditions of the respective parties contained herein or made pursuant to this
Warrant shall survive the execution and delivery of this Warrant.

          g.   Amendments. Any provision of this Warrant may be amended by a
               ----------
written instrument signed by the Company and by the Holder.

                 [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]

                     [SIGNATURE PAGE FOLLOWS IMMEDIATELY]

                                       16
<PAGE>

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

BRITESMILE, INC.

By:_____________________________________
     Its:_______________________________

                                       17
<PAGE>

                                                                       EXHIBIT A

                              NOTICE OF EXERCISE

     (1)  The undersigned Holder hereby [check one]:

          elects to purchase ________ shares of the Common Stock of BriteSmile,
          Inc., pursuant to Section 2(a) of the Warrant dated the ___ day of
          June, 2000 (the "Warrant") between BriteSmile, Inc., and the Holder,
          and tenders herewith payment of the Exercise Price (as defined in the
          Warrant) for such shares in full, together with all applicable
          transfer taxes, if any; or

          elects to purchase ________ shares of the Common Stock of BriteSmile,
          Inc., pursuant to the terms of Section 2(c) of the Warrant dated the
          ___ day of June, 2000 (the "Warrant") between BriteSmile, Inc., and
          the Holder, upon which election, the Holder shall receive a total of
          _________ shares of Common Stock and tenders herewith payment of all
          applicable transfer taxes, if any.

     (2)  In exercising its rights to purchase the Common Stock of BriteSmile,
Inc., the undersigned hereby confirms and acknowledges the investment
representations and warranties made in Section 6 of the Warrant, and agrees that
such representations and warranties are true and correct as of the date hereof.

     (3)  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:_______________________________________

                                   Signature:__________________________________

     (4)  Please issue a new Warrant for the unexercised portion of the attached
Warrant in the name of the undersigned or in such other name as is specified
below:

Name:____________________________     Date:______________________________

Signature:_______________________

                                       18
<PAGE>

                                                                       EXHIBIT B

                                ASSIGNMENT FORM

     FOR VALUE RECEIVED, the undersigned registered owner of this Warrant hereby
sells, assigns and transfers unto the Assignee named below all of the rights of
the undersigned under this Warrant, with respect to the number of shares of
Common Stock set forth below:

Name of Assignee               Address                   No. of Shares

________________________       _____________________     _____________

                               _____________________

                               _____________________

and does irrevocably constitute and appoint Paul A. Boyer to make such transfer
on the books of BriteSmile, Inc., maintained for the purpose, with full power of
substitution in the premises.

     The undersigned also represents that, by assignment hereof, the Assignee
acknowledges that this Warrant and the shares of Common Stock to be issued upon
exercise hereof or conversion thereof are being acquired for investment and that
the Assignee will not offer, sell or otherwise dispose of this Warrant or any
shares of Common Stock to be issued upon exercise hereof or conversion thereof
except under circumstances which will not result in a violation of the
Securities Act of 1933, as amended, or any state securities laws. Further, the
Assignee has acknowledged that upon exercise of this Warrant, the Assignee
shall, if requested by the Company, confirm in writing, in a form satisfactory
to the Company, that the shares of Common Stock so purchased are being acquired
for investment and not with a view toward distribution or resale in violation of
the Securities Act of 1933, as amended, or any applicable state securities law.

Dated: ______________________

Signature of Holder:

___________________________________

                                       19<PAGE>

                                 EXHIBIT 10.29

                         REGISTRATION RIGHTS AGREEMENT

     REGISTRATION RIGHTS AGREEMENT (this "Agreement"), dated as of June 27,
2000, is made by and among BRITESMILE, INC., a Utah corporation with
headquarters located at 490 North Wiget Lane, Walnut Creek, California 94598
(the "Company"), the undersigned Purchasers (individually a "Purchaser" and
collectively the "Purchasers"), and FLEETBOSTON ROBERTSON STEPHENS, INC. with
its principal place of business at 555 California Street, 20/th/ Floor, San
Francisco, California 94104 ("Placement Agent").

                                    Recitals

     A.  In connection with the Securities Purchase Agreement by and among the
parties hereto of even date herewith (the "Purchase Agreement"), the Company has
agreed, upon the terms and subject to the conditions of the Purchase Agreement,
to issue and sell to the Purchasers (i) $15,583,333 aggregate principal amount
of the Company's 5% Convertible Subordinated Notes Due 2005 (the "Notes"), which
will be convertible into shares (as converted, the "Conversion Shares") of the
Company's common stock, par value $0.001 per share (the "Common Stock"), in
accordance with the terms of the Notes and (ii) warrants to purchase shares of
Common Stock (the "Warrants" and, as exercised, the "Warrant Shares").

     B.  In connection with the closing of the transactions contemplated by the
Purchase Agreement, and as compensation to the Placement Agent, the Company has
agreed to issue a warrant to the Placement Agent (the "Placement Agent Warrant"
and, as exercised, the "Placement Agent Warrant Shares").

     C.  To induce the Purchasers to execute and deliver the Purchase Agreement,
and the Placement Agent to perform its services in connection with the Purchase
Agreement, the Company has agreed to provide certain registration rights under
the Securities Act of 1933, as amended, and the rules and regulations
thereunder, or any similar successor statute (collectively, the "Securities
Act"), and applicable state securities laws.

                                   Agreement

     NOW, THEREFORE, in consideration of the premises and the mutual covenants
contained herein and other good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, the Company and each of the
Purchasers hereby agree as follows:

     1.   Definitions. As used in this Agreement, the following terms shall have
          -----------
the following meanings:
<PAGE>

          a.   "Investor" means a Purchaser, the Placement Agent and any
transferee or assignee thereof about whom the Purchaser or the Placement Agent
provides notice to the Company in accordance with Section 9 and to whom a
Purchaser or the Placement Agent assigns its rights under this Agreement and who
agrees to become bound by the provisions of this Agreement in accordance with
Section 9 and any transferee or assignee thereof to whom a transferee or
assignee assigns its rights under this Agreement and who agrees to become bound
by the provisions of this Agreement in accordance with Section 9.

          b.   "Person" means a corporation, a limited liability company, an
association, a partnership, an organization, a business, an individual, a
governmental or political subdivision thereof or a governmental agency.

          c.   "Register," "registered," and "registration" refer to a
registration effected by preparing and filing one or more Registration
Statements (as defined below) in compliance with the Securities Act and pursuant
to Rule 415 under the Securities Act or any successor rule providing for
offering securities on a continuous or delayed basis ("Rule 415"), and the
declaration or ordering of effectiveness of such Registration Statement(s) by
the United States Securities and Exchange Commission (the "SEC").

          d.   "Registrable Securities" means (i) the Conversion Shares issued
or issuable upon conversion of the Notes, (ii) the Warrant Shares issued or
issuable upon exercise of the Warrants, (iii) the Placement Agent Warrant Shares
issued or issuable upon exercise of the Placement Agent Warrant and (iv) any
shares of capital stock issued or issuable with respect to the Conversion
Shares, the Notes, the Warrant Shares, the Placement Agent Warrant Shares, the
Warrants or the Placement Agent Warrant as a result of any stock split, stock
dividend, recapitalization, exchange or similar event or otherwise, without
regard to any limitations on conversions of the Notes or exercises of Warrants.

          e.   "Registration Statement" means a registration statement or
registration statements of the Company filed under the Securities Act covering
the Registrable Securities.

     Capitalized terms used herein and not otherwise defined herein shall have
the respective meanings set forth in the Purchase Agreement and its exhibits,
schedules and attachments.

     2.   Registration.
          ------------

          a.   Mandatory Registration. The Company shall prepare, and, as soon
               ----------------------
as practicable, but in no event later than the first Business Day after the date
which is forty-five (45) days after the Closing Date (as defined in the Purchase
Agreement) (the "Filing Deadline") file with the SEC a Registration Statement or
Registration Statements (as necessary) on Form S-3 covering the resale of the
Registrable Securities as provided for in this Section 2(a). In the event that
Form S-3 is unavailable for such a registration,

                                      -2-
<PAGE>

the Company shall use such other form as is available for such a registration,
subject to the provisions of Section 2(d). The initial Registration Statement
prepared pursuant hereto shall register for resale at least that number of
shares of Common Stock equal to the sum of (A) (i) $23,375,000 divided by (ii)
the product of (y) 75% and (z) the Market Price (as defined in the Notes) on the
Pricing Date (as defined in the Notes) plus (B) 100% of the number of Warrant
Shares issuable upon exercise of the Warrants (without regard to any limitations
on exercise) as of the trading day immediately preceding the date the
Registration Statement is initially filed with the SEC. The Company shall use
its best efforts to cause such Registration Statement to be declared effective
by the SEC as soon as practicable, but in no event later than the date which is
One Hundred Twenty (120) days after the Closing Date (the "Effectiveness
Deadline")

          b.   Allocation of Registrable Securities.  The initial number of
               ------------------------------------
Registrable Securities included in any Registration Statement and each increase
in the number of Registrable Securities included therein shall be allocated pro
rata among the Investors based on the number of Registrable Securities held by
each Investor at the time the Registration Statement covering such initial
number of Registrable Securities or increase thereof is declared effective by
the SEC.  In the event that an Investor sells or otherwise transfers any of such
Investor's Registrable Securities, each transferee shall be allocated a pro rata
portion of the then remaining number of Registrable Securities included in such
Registration Statement for such transferor.  Any shares of Common Stock included
in a Registration Statement and which remain allocated to any Person which
ceases to hold any Registrable Securities covered by such Registration Statement
shall be allocated to the remaining Investors, pro rata based on the number of
Registrable Securities then held by such Investors which are covered by such
Registration Statement.

          c.   Legal Counsel. Subject to Section 5 hereof, the Purchasers
               -------------
holding at least two thirds (2/3) of the Registrable Securities shall have the
right to select one legal counsel to review and oversee any offering pursuant to
this Section 2 ("Legal Counsel"). The Company shall reasonably cooperate with
Legal Counsel in performing the Company's obligations under this Agreement.

          d.   Ineligibility for Form S-3.  In the event that Form S-3 is not
               --------------------------
available for any registration of Registrable Securities hereunder, the Company
shall (i) register the sale of the Registrable Securities on another appropriate
form and (ii) undertake to register the Registrable Securities on Form S-3 as
soon as such form is available, provided that the Company shall maintain the
effectiveness of the Registration Statement then in effect until such time as a
Registration Statement on Form S-3 covering the Registrable Securities has been
declared effective by the SEC.

          e.   Sufficient Number of Shares Registered. In the event the number
               --------------------------------------
of shares available under a Registration Statement filed pursuant to Section
2(a) is insufficient to cover all of the Registrable Securities required to be
covered by such Registration Statement or an Investor's allocated portion of the
Registrable Securities pursuant to Section 2(b), the Company shall amend the
Registration Statement, or file a new Registration Statement (on the short form
available therefor, if applicable), or both,

                                      -3-
<PAGE>

so as to cover at least 200% of the number of such Registrable Securities as of
the trading day immediately preceding the date of the filing of such amendment
or new Registration Statement, in each case, as soon as practicable, but in any
event not later than fifteen (15) days after the necessity therefor arises. The
Company shall use it best efforts to cause such amendment and/or new
Registration Statement to become effective as soon as practicable following the
filing thereof. For purposes of the foregoing provision, the number of shares
available under a Registration Statement shall be deemed "insufficient to cover
all of the Registrable Securities" if at any time after (i) an adjustment to the
Conversion Price (as defined in the Notes) pursuant to Section 2(f)(i) of the
Notes or (ii) an adjustment to the Exercise Price (as defined in the Warrants)
pursuant to Section 8(a) of the Warrants, the number of Registrable Securities
issued or issuable upon conversion of the Notes and exercise of the Warrants
covered by such Registration Statement is greater than the quotient determined
by dividing (i) the number of shares of Common Stock available for resale under
such Registration Statement by (ii) 1.5. The calculation set forth in the
foregoing sentence shall be made without regard to any limitations on the
conversion of the Notes or exercise of the Warrants and such calculation shall
assume that the Notes and the Warrants are then convertible and exercisable,
respectively, into shares of Common Stock at the then prevailing Conversion Rate
(as defined in the Notes) and Exercise Price (as defined in the Warrants),
respectively, if applicable.

          f.   Effect of Failure to File and Obtain and Maintain Effectiveness
               ---------------------------------------------------------------
of Registration Statement.
-------------------------

               (i)   Failure to File and Obtain Effectiveness. If a
                     ----------------------------------------
Registration Statement covering all the applicable Registrable Securities and
required to be filed by the Company pursuant to this Agreement is not (A) filed
with the SEC on or before the Filing Deadline or (B) declared effective by the
SEC on or before the Effectiveness Deadline, then, as partial relief for the
damages to any holder (which remedy shall not be exclusive of any other remedies
available at law or in equity), the Company shall pay to each holder of the
Notes an amount in cash equal to the product of (i) the aggregate Conversion
Amount of Notes held by such holder of Notes multiplied by (ii) the sum of (A)
0.01, if the Registration Statement is not filed by the Filing Deadline, plus
(B) 0.01, if the Registration Statement is not declared effective by the
Effectiveness Deadline, plus (C) the product of (I) 0.0005 multiplied by (II)
the sum of (x) the number of days after the Filing Deadline that such
Registration Statement is not filed with the SEC, plus (y) the number of days
after the Effectiveness Deadline that such Registration Statement is not
declared effective by the SEC.

               (ii)   Failure to Maintain Effectiveness. If on any day after a
                      ---------------------------------
Registration Statement has been declared effective by the SEC, sales of all the
Registrable Securities required to be included on such Registration Statement
cannot be made pursuant to such Registration Statement for any reason
(including, without limitation, because of a failure to keep the Registration
Statement effective, to disclose such information as is necessary for sales to
be made (other than during an Allowable Grace Period (as defined below))
pursuant to such Registration Statement or to have registered a sufficient
number of shares of Common Stock), then, as partial relief for the

                                      -4-
<PAGE>

damages to any holder (which remedy shall not be exclusive of any other remedies
available at law or in equity), the Company shall pay to each holder of the
Notes an amount in cash equal to: (A) the product of (i) the aggregate
Conversion Amount of Notes held by such holder of Notes and (ii) the product of
(I) 0.01 and (II) the number of days after effectiveness of a Registration
Statement that it has lapsed or is unavailable (as described above) (other than
during an Allowable Grace Period).

               (iii)  Date of Payment. The payments to which a holder shall be
                      ---------------
entitled pursuant to this Section 2(d) are referred to herein as "Registration
Delay Payments." Registration Delay Payments shall be paid on the earlier of (I)
the last day of the calendar month during which such Registration Delay Payments
are incurred and (II) the third business day after the event or failure giving
rise to the Registration Delayed Payments is cured. In the event the Company
fails to make Registration Delay Payments in a timely manner, such Registration
Delay Payments shall bear interest at the rate of 1.5% per month (prorated for
partial months) until paid in full.

     3.   Related Obligations.  At such time as the Company is obligated to file
          -------------------
a Registration Statement with the SEC pursuant to Section 2(a) or 2(e), the
Company will use its best efforts to effect the registration of the Registrable
Securities in accordance with the intended method of disposition thereof and,
pursuant thereto, the Company shall have the following obligations:

          a.   The Company shall promptly prepare and file with the SEC a
Registration Statement with respect to the Registrable Securities (but in no
event later than the Filing Deadline) and use its best efforts to cause such
Registration Statement relating to the Registrable Securities to become
effective as soon as possible after such filing (but in no event later than the
Effectiveness Deadline) and keep such Registration Statement effective pursuant
to Rule 415 at all times until the earlier of (i) the date as of which the
Investors may sell all of the Registrable Securities without restriction
pursuant to Rule 144(k) promulgated under the Securities Act (or successor
thereto) or (ii) the date on which (A) the Investors shall have sold all the
Registrable Securities and (B) none of the Notes or Warrants or the Placement
Agent Warrant is outstanding (the "Registration Period"), which Registration
Statement (including any amendments or supplements thereto and prospectuses
contained therein) shall not contain any 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 in which they were
made, not misleading. The term "best efforts" as used in the first sentence of
this Section 3(a) shall mean, among other things, that the Company shall submit
to the SEC, within three (3) business days after the Company learns that no
review of a particular Registration Statement will be made by the staff of the
SEC or that the staff has no further comments on the Registration Statement, as
the case may be, a request for acceleration of effectiveness of such
Registration Statement to a time and date not later than forty-eight (48) hours
after the submission of such request.

          b.   The Company shall prepare and file with the SEC such amendments
(including post-effective amendments) and supplements to a Registration

                                      -5-
<PAGE>

Statement and the prospectus used in connection with such Registration
Statement, which prospectus is to be filed pursuant to Rule 424 promulgated
under the  Securities Act, as may be necessary to keep such Registration
Statement effective at all times during the Registration Period, and, during
such period, comply with the provisions of the  Securities Act with respect to
the disposition of all Registrable Securities of the Company covered by such
Registration Statement until such time as all of such Registrable Securities
shall have been disposed of in accordance with the intended methods of
disposition by the seller or sellers thereof as set forth in such Registration
Statement.  In the case of amendments and supplements to a Registration
Statement which are required to be filed pursuant to this Agreement (including
pursuant to this Section 3(b)) by reason of the Company filing a report on Form
10-K, Form 10-Q or Form 8-K or any analogous report under the Securities
Exchange Act of 1934, as amended (the "1934 Act"), the Company shall file such
amendments or supplements with the SEC on the same day on which the 1934 Act
report is filed which created the requirement for the Company to amend or
supplement the Registration Statement.

          c.   The Company shall (a) permit Legal Counsel to review and comment
upon a Registration Statement and all amendments and supplements thereto at
least five (5) Business Days prior to their filing with the SEC and (b) not file
any document in a form to which Legal Counsel reasonably objects, provided that
notwithstanding anything to the contrary in this Agreement, the Company shall
suffer no adverse consequence from any delay in the filing of a Registration
Statement if such delay is caused by any delay in review of or comment on such
Registration Statement by Legal Counsel. The Company shall not submit a request
for acceleration of the effectiveness of a Registration Statement or any
amendment or supplement thereto without the prior approval of Legal Counsel,
which consent shall not be unreasonably withheld. The Company shall promptly
furnish to Legal Counsel, without charge, (i) any correspondence from the SEC or
the staff of the SEC to the Company or its representatives relating to any
Registration Statement, (ii) promptly after the same is prepared and filed with
the SEC, one copy of any Registration Statement and any amendment(s) thereto,
including financial statements and schedules, and all exhibits and (iii) upon
the effectiveness of any Registration Statement, one copy of the prospectus
included in such Registration Statement and all amendments and supplements
thereto. The Company shall reasonably cooperate with Legal Counsel in performing
the Company's obligations pursuant to this Section 3.

          d.   The Company shall furnish to each Investor whose Registrable
Securities are included in any Registration Statement, without charge, (i)
promptly after the same is prepared and filed with the SEC, at least one copy of
such Registration Statement and any amendment(s) thereto, including financial
statements and schedules, and all exhibits, (ii) upon the effectiveness of any
Registration Statement, ten (10) copies of the prospectus included in such
Registration Statement and all amendments and supplements thereto (or such other
number of copies as such Investor may reasonably request) and (iii) such other
documents, including copies of any preliminary or final prospectus, as such
Investor may reasonably request from time to time in order to facilitate the
disposition of the Registrable Securities owned by such Investor.

                                      -6-
<PAGE>

          e.   The Company shall use reasonable efforts to (i) register and
qualify the Registrable Securities covered by a Registration Statement under
such other securities or "blue sky" laws of such jurisdictions in the United
States as Legal Counsel or any Investor reasonably requests, (ii) prepare and
file in those jurisdictions such amendments (including post- effective
amendments) and supplements to such registrations and qualifications as may be
necessary to maintain the effectiveness thereof during the Registration Period,
(iii) take such other actions as may be necessary to maintain such registrations
and qualifications in effect at all times during the Registration Period, and
(iv) take all other actions reasonably necessary or advisable to qualify the
Registrable Securities for sale in such jurisdictions; provided, however, that
the Company shall not be required in connection therewith or as a condition
thereto to (x) qualify to do business in any jurisdiction where it would not
otherwise be required to qualify but for this Section 3(e), (y) subject itself
to general taxation in any such jurisdiction, or (z) file a general consent to
service of process in any such jurisdiction. The Company shall promptly notify
Legal Counsel and each Investor who holds Registrable Securities of the receipt
by the Company of any notification with respect to the suspension of the
registration or qualification of any of the Registrable Securities for sale
under the securities or "blue sky" laws of any jurisdiction in the United States
or its receipt of actual notice of the initiation or threat of any proceeding
for such purpose.

          f.   As promptly as practicable after becoming aware of such event or
development, the Company shall notify Legal Counsel and each Investor in writing
of the happening of any event as a result of which the prospectus included in a
Registration Statement, as then in effect, includes an untrue statement of a
material fact or omission 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 (provided that such notice shall not
contain any material, nonpublic information), and promptly prepare a supplement
or amendment to such Registration Statement to correct such untrue statement or
omission, and deliver ten (10) copies of such supplement or amendment to Legal
Counsel and each Investor (or such other number of copies as Legal Counsel or
such Investor may reasonably request). The Company shall also promptly notify
Legal Counsel and each Investor in writing (i) when a prospectus or any
prospectus supplement or post-effective amendment has been filed, and when a
Registration Statement or any post-effective amendment has become effective
(notification of such effectiveness shall be delivered to Legal Counsel and each
Investor by facsimile on the same day of such effectiveness and by overnight
mail), (ii) of any request by the SEC for amendments or supplements to a
Registration Statement or related prospectus or related information, and (iii)
of the Company's reasonable determination that a post-effective amendment to a
Registration Statement would be appropriate.

          g.   The Company shall use its best efforts to prevent the issuance of
any stop order or other suspension of effectiveness of a Registration Statement,
or the suspension of the qualification of any of the Registrable Securities for
sale in any jurisdiction and, if such an order or suspension is issued, to
obtain the withdrawal of such order or suspension at the earliest possible
moment and to notify Legal Counsel and each

                                      -7-
<PAGE>

Investor who holds Registrable Securities being sold of the issuance of such
order and the resolution thereof or its receipt of actual notice of the
initiation or threat of any proceeding for such purpose.

          h.   At the reasonable request of any Purchaser, the Company shall
furnish to such Purchaser, on the date of the effectiveness of the Registration
Statement and thereafter from time to time upon any change or addition
(including by way of incorporation by reference) to the financial statements or
financial information included in the Registration Statement (i) a letter, dated
such date, from the Company's independent certified public accountants in form
and substance as is customarily given by independent certified public
accountants to underwriters in an underwritten public offering, addressed to
such Purchaser and the Company, and (ii) an opinion, dated as of such date, of
counsel representing the Company for purposes of such Registration Statement, in
form, scope and substance as is customarily given in an underwritten public
offering, addressed to such Purchaser.

          i.   The Company shall make available for inspection by (i) any
Investor, (ii) Legal Counsel and (iii) accountants or other agents retained by
the Investors (collectively, the "Inspectors") all pertinent financial and other
records, and pertinent corporate documents and properties of the Company
(collectively, the "Records"), as shall be reasonably deemed necessary by each
Inspector, and cause the Company's officers, directors and employees to supply
all information which any Inspector may reasonably request; provided, however,
that each Inspector shall hold in strict confidence and shall not make any
disclosure (except to an Investor) or use of any Record or other information
which the Company determines in good faith to be confidential, and of which
determination the Inspectors are so notified, unless (a) the disclosure of such
Records is necessary to avoid or correct a misstatement or omission in any
Registration Statement or is otherwise required under the Securities Act, (b)
the release of such Records is ordered pursuant to a final, non-appealable
subpoena or order from a court or government body of competent jurisdiction, or
(c) the information in such Records has been made generally available to the
public other than by disclosure in violation of this or any other agreement of
which the Inspector has knowledge. Each Investor agrees that it shall, upon
learning that disclosure of such Records is sought in or by a court or
governmental body of competent jurisdiction or through other means, give prompt
notice to the Company and allow the Company, at its expense, to undertake
appropriate action to seek to prevent disclosure of, or to seek to obtain a
protective order for, the Records deemed confidential.

          j.   The Company shall hold in confidence and not make any disclosure
of information concerning an Investor provided to the Company unless (i)
disclosure of such information is necessary to comply with federal or state
securities laws, (ii) the disclosure of such information is necessary to avoid
or correct a misstatement or omission in any Registration Statement, (iii) the
release of such information is ordered pursuant to a subpoena or other final,
non-appealable order from a court or governmental body of competent
jurisdiction, or (iv) such information has been made generally available to the
public other than by disclosure in violation of this Agreement or any other
agreement. The Company agrees that it shall, upon learning that

                                      -8-
<PAGE>

disclosure of such information concerning an Investor is sought in or by a court
or governmental body of competent jurisdiction or through other means, give
prompt written notice to such Investor and allow such Investor, at the
Investor's expense, to undertake appropriate action to seek to prevent
disclosure of, or to seek to obtain a protective order for, such information.

          k.   The Company shall use its best efforts either to (i) cause all
the Registrable Securities covered by a Registration Statement to be listed on
each securities exchange on which securities of the same class or series issued
by the Company are then listed, if any, if the listing of such Registrable
Securities is then permitted under the rules of such exchange, or (ii) secure
designation and quotation of all the Registrable Securities covered by the
Registration Statement on the Nasdaq National Market, The American Stock
Exchange, Inc., or The New York Stock Exchange, Inc., or (iii) if, despite the
Company's best efforts to satisfy the preceding clause (i) or (ii), the Company
is unsuccessful in satisfying the preceding clause (i) or (ii), to secure the
inclusion for quotation on The Nasdaq SmallCap Market for such Registrable
Securities and, without limiting the generality of the foregoing, to arrange for
at least two market makers to register with the National Association of
Securities Dealers, Inc. (the "NASD") as such with respect to such Registrable
Securities. The Company shall pay all fees and expenses in connection with
satisfying its obligation under this Section 3(k).

          l.   The Company shall cooperate with the Investors who hold
Registrable Securities being offered and, to the extent applicable, to
facilitate the timely preparation and delivery of certificates (not bearing any
restrictive legend, provided that the Investors shall have provided reasonably
sufficient representations to the Company that they have satisfied any
prospectus delivery requirement applicable under the Securities Act or under
applicable state securities laws) representing the Registrable Securities to be
offered pursuant to a Registration Statement and enable such certificates to be
in such denominations or amounts, as the case may be, as the Investors may
reasonably request and registered in such names as the Investors may request.

          m.   The Company shall provide a transfer agent and registrar of all
such Registrable Securities not later than the effective date of such
Registration Statement.

          n.   If requested by an Investor, the Company shall (i) immediately
incorporate in a prospectus supplement or post-effective amendment such
information as an Investor requests to be included therein relating to the sale
and distribution of Registrable Securities, including, without limitation,
information with respect to the number of Registrable Securities being offered
or sold, the purchase price being paid therefor and any other terms of the
offering of the Registrable Securities; (ii) make all required filings of such
prospectus supplement or post-effective amendment as soon as notified of the
matters to be incorporated in such prospectus supplement or post-effective
amendment; and (iii) supplement or make amendments to any Registration Statement
if requested by an Investor of such Registrable Securities.

                                      -9-
<PAGE>

          o.   The Company shall use its best efforts to cause the Registrable
Securities covered by the applicable Registration Statement to be registered
with or approved by such other governmental agencies or authorities as may be
necessary to consummate the disposition of such Registrable Securities.

          p.   The Company shall make generally available to its security
holders as soon as practical, but not later than ninety (90) days after the
close of the period covered thereby, an earnings statement (in form complying
with the provisions of Rule 158 under the Securities Act) covering a twelve-
month period beginning not later than the first day of the Company's fiscal
quarter next following the effective date of the Registration Statement.

          q.   The Company shall otherwise use its best efforts to comply with
all applicable rules and regulations of the SEC in connection with any
registration hereunder.

          r.   Within two (2) business days after a Registration Statement which
includes the Registrable Securities is ordered effective by the SEC, the Company
shall deliver, and shall cause legal counsel for the Company to deliver, to the
transfer agent for such Registrable Securities (with copies to the Investors
whose Registrable Securities are included in such Registration Statement)
confirmation that such Registration Statement has been declared effective by the
SEC in the form attached hereto as Exhibit A.

          s.   The Company shall take all other reasonable actions necessary to
expedite and facilitate disposition by the Investors of Registrable Securities
pursuant to a Registration Statement.

          t.   Notwithstanding anything to the contrary in this Agreement, at
any time after the applicable Registration Statement has been declared effective
by the SEC, the Company may delay the disclosure of material non-public
information concerning the Company the disclosure of which at the time is not,
in the good faith opinion of the Board of Directors of the Company, in the best
interest of the Company and, in the opinion of counsel to the Company, otherwise
required (a "Grace Period"); provided, that the Company shall promptly (i)
notify the Investors in writing of the existence of material non-public
information giving rise to a Grace Period (provided that in each notice the
Company will not disclose the content of such material non- public information
to the Investors) and the date on which the Grace Period will begin, and (ii)
notify the Investors in writing of the date on which the Grace Period ends; and,
provided further, that no Grace Period shall exceed 15 consecutive days and
during any consecutive 365 day period, such Grace Periods shall not exceed an
aggregate of 30 days and the first day of any Grace Period must be at least two
trading days after the last day of any prior Grace Period (an "Allowable Grace
Period"). For purposes of determining the length of a Grace Period above, the
Grace Period shall begin on and include the date the holders receive the notice
referred to in clause (i) and shall end on and include the later of the date the
holders receive the notice referred to in clause (ii) and the date referred to
in such notice. The provisions of Section 3(f) hereof shall not be applicable
during the period of

                                      -10-
<PAGE>

any Allowable Grace Period. Upon expiration of the Grace Period, the Company
shall again be bound by the first sentence of Section 3(f) with respect to the
information giving rise thereto unless such material non-public information is
no longer applicable.

     4.   Obligations Of The Investors.
          ----------------------------

     a.   At least seven (7) days prior to the first anticipated filing date of
a Registration Statement, the Company shall notify each Investor in writing of
the information the Company requires from each such Investor if such Investor
elects to have any of such Investor's Registrable Securities included in such
Registration Statement. It shall be a condition precedent to the obligations of
the Company to complete the registration pursuant to this Agreement with respect
to the Registrable Securities of a particular Investor that such Investor shall
furnish to the Company such information regarding itself, the Registrable
Securities held by it and the intended method of disposition of the Registrable
Securities held by it as shall be reasonably required to effect the registration
of such Registrable Securities and shall execute such documents in connection
with such registration as the Company may reasonably request.

     b.   Each Investor by such Investor's acceptance of the Registrable
Securities agrees to cooperate with the Company as reasonably requested by the
Company in connection with the preparation and filing of any Registration
Statement hereunder, unless such Investor has notified the Company in writing of
such Investor's election to exclude all of such Investor's Registrable
Securities from such Registration Statement.

     c.   Each Investor agrees that, upon receipt of any notice from the Company
of the happening of any event of the kind described in Section 3(g) or the first
sentence of 3(f), such Investor will immediately discontinue disposition of
Registrable Securities pursuant to any Registration Statement(s) covering such
Registrable Securities until such Investor's receipt of the copies of the
supplemented or amended prospectus contemplated by Section 3(g) or the first
sentence of 3(f) or receipt of notice that no supplement or amendment is
required.  Notwithstanding anything to the contrary, the Company shall cause its
transfer agent to deliver unlegended shares of Common Stock to a transferee of
an Investor in accordance with the terms of the Purchase Agreement in connection
with any sale of Registrable Securities with respect to which an Investor has
entered into a contract for sale prior to the Investor's receipt of a notice
from the Company of the happening of any event of the kind described in Section
3(f) or the first sentence of 3(h) and for which the Investor has not yet
settled.

     5.   Expenses Of Registration.  All reasonable expenses, other than
          ------------------------
underwriting discounts and brokerage commissions, incurred in connection with
registrations, filings or qualifications pursuant to Sections 2 and 3,
including, without limitation, all registration, listing and qualifications
fees, printers, legal and accounting fees shall be paid by the Company.  In
addition, the Company shall reimburse the Investors for the reasonable fees and
disbursements of Legal Counsel in connection with registrations, filings or
qualifications pursuant to Sections 2 and 3 of this Agreement

                                      -11-
<PAGE>

(other than Section 3(h)) which amount combined with expenses incurred by the
Purchasers pursuant to Section 3.7 of the Purchase Agreement shall not exceed
$50,000.

     6.   Indemnification.  In the event any Registrable Securities are included
          ---------------
in a Registration Statement under this Agreement:

          a.   Indemnification by the Company. The Company shall,
               ------------------------------
notwithstanding any termination of this Agreement and without limitation as to
time, indemnify and hold harmless each Investor, the officers, directors,
partners, members, agents (including any underwriters retained by such Investor
in connection with the offer and sale of Registrable Securities), each Person
who controls any such Investor (within the meaning of Section 15 of the
Securities Act or Section 20 of the Exchange Act) and the officers, directors,
agents and employees of each such controlling Person, to the fullest extent
permitted by applicable law, from and against any and all losses, claims,
damages, liabilities, costs (including, without limitation, costs of preparation
and attorneys' fees) and expenses (collectively, "Losses"), as incurred, arising
out of or relating to any untrue or alleged untrue statement of a material fact
contained in a Registration Statement, any Prospectus or any form of prospectus
or in any amendment or supplement thereto or in any preliminary prospectus, or
arising out of or relating to any omission or alleged omission of a material
fact required to be stated therein or necessary to make the statements therein
(in the case of any Prospectus or form of prospectus or supplement thereto, in
light of the circumstances under which they were made) not misleading, except to
the extent, but only to the extent, that such untrue statements or omissions are
based solely upon information regarding such Investor furnished in writing to
the Company by or on behalf of such Investor expressly for use therein, which
information was reasonably relied on by the Company for use therein or to the
extent that such information relates to such Investor or such Investor's
proposed method of distribution of Registrable Securities and was reviewed and
expressly approved in writing by such Investor expressly for use in the
Registration Statement, such Prospectus or such form of Prospectus or in any
amendment or supplement thereto.

          b.   Indemnification by Investors. In connection with any Registration
               ----------------------------
Statement in which an Investor is identified as a selling shareholder, each such
Investor shall, severally and not jointly, indemnify and hold harmless the
Company, the directors, officers, agents and employees, each Person who controls
the Company (within the meaning of Section 15 of the Securities Act and Section
20 of the Exchange Act), and the directors, officers, agents or employees of
such controlling Persons, to the fullest extent permitted by applicable law,
from and against all Losses (as determined by a court of competent jurisdiction
in a final judgment not subject to appeal or review) arising solely out of or
based solely upon any untrue statement of a material fact or alleged untrue
statement of material fact contained in the Registration Statement, any
Prospectus, or any form of prospectus, or arising solely out of or based solely
upon any omission or alleged omission of a material fact required to be stated
therein or necessary to make the statements therein not misleading to the
extent, but only to the extent, that such untrue statement or omission is
contained in any information so furnished in writing by such Investor to the
Company specifically for inclusion in the Registration Statement or such

                                      -12-
<PAGE>

Prospectus and that such information was reasonably relied upon by the Company
for use in the Registration Statement, such Prospectus or such form of
prospectus or to the extent that such information relates to such Investor or
such Investor's proposed method of distribution of Registrable Securities and
was reviewed and expressly approved in writing by such Investor expressly for
use in the Registration Statement, such Prospectus or such form of Prospectus.
Notwithstanding anything to the contrary in this Agreement, in no event shall
the liability of any selling Investor hereunder be greater in amount than the
dollar amount of the net proceeds received by such Investor upon the sale of the
Registrable Securities giving rise to such indemnification obligation.

          c.   Conduct of Indemnification Proceedings.
               --------------------------------------

               (i)   If any Proceeding shall be brought or asserted against any
Person entitled to indemnity hereunder (an "Indemnified Party"), such
Indemnified Party promptly shall notify the Person from whom indemnity is sought
(the "Indemnifying Party") in writing, and the Indemnifying Party shall assume
the defense thereof, including the employment of counsel reasonably satisfactory
to the Indemnified Party and the payment of all fees and expenses incurred in
connection with defense thereof; provided, that the failure of any Indemnified
Party to give such notice shall not relieve the Indemnifying Party of its
obligations or liabilities pursuant to this Agreement, except (and only) to the
extent that it shall be finally determined by a court of competent jurisdiction
(which determination is not subject to appeal or further review) that such
failure shall have proximately and materially adversely prejudiced the
Indemnifying Party.

               (ii)  An Indemnified Party shall have the right to employ
separate counsel in any such Proceeding and to participate in the defense
thereof, but the fees and expenses of such counsel shall be at the expense of
such Indemnified Party or Parties unless: (1) the Indemnifying Party has agreed
to pay such fees and expenses; or (2) the Indemnifying Party shall have failed
promptly to assume the defense of such Proceeding and to employ counsel
reasonably satisfactory to such Indemnified Party in any such Proceeding; or (3)
the named parties to any such Proceeding (including any impleaded parties)
include both such Indemnified Party and the Indemnifying Party, and such
Indemnified Party shall have been advised by counsel that a conflict of interest
is likely to exist if the same counsel were to represent such Indemnified Party
and the Indemnifying Party (in which case, if such Indemnified Party notifies
the Indemnifying Party in writing that it elects to employ separate counsel at
the expense of the Indemnifying Party, the Indemnifying Party shall not have the
right to assume the defense thereof and such counsel shall be at the expense of
the Indemnifying Party). The Indemnifying Party shall not be liable for any
settlement of any such Proceeding effected without its written consent, which
consent shall not be unreasonably withheld. No Indemnifying Party shall, without
the prior written consent of the Indemnified Party, effect any settlement of any
pending Proceeding in respect of which any Indemnified Party is a party, unless
such settlement includes an unconditional release of such Indemnified Party from
all liability on claims that are the subject matter of such Proceeding.

                                      -13-
<PAGE>

               (iii)  All fees and expenses of the Indemnified Party (including
reasonable fees and expenses to the extent incurred in connection with
investigating or preparing to defend such Proceeding in a manner not
inconsistent with this Section) shall be paid to the Indemnified Party, as
incurred, within ten (10) Business Days after written notice thereof to the
Indemnifying Party (regardless of whether it is ultimately determined that an
Indemnified Party is not entitled to indemnification hereunder; provided, that
the Indemnifying Party may require such Indemnified Party to undertake to
reimburse all such fees and expenses to the extent it is finally judicially
determined that such Indemnified Party is not entitled to indemnification
hereunder).

               (iv)   The Indemnified Party shall notify the Indemnifying Party
promptly of any Proceeding of which the Indemnified Party shall have been
notified in writing in connection with the transactions contemplated by this
Agreement and as to which the Indemnified Party believes it may be entitled to
indemnification hereunder. The failure of the Indemnified Party to so notify the
Indemnifying Party of such a Proceeding shall not impair or affect the
Indemnified Party's rights to indemnification hereunder except and only to the
extent that such failure is shown to be the proximate cause of additional Loss.

          d.   Contribution. If a claim for indemnification under Section 6(a)
               ------------
or 6(b) is unavailable to an Indemnified Party because of a failure or refusal
of a governmental authority to enforce such indemnification in accordance with
its terms (by reason of public policy or otherwise), then each 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 Losses, in
such proportion as is appropriate to reflect the relative fault of the
Indemnifying Party and Indemnified Party in connection with the actions,
statements or omissions that resulted in such Losses as well as any other
relevant equitable considerations. The relative fault of such Indemnifying Party
and Indemnified Party shall be determined by reference to, among other things,
whether any action in question, including any untrue or alleged untrue statement
of a material fact or omission or alleged omission of a material fact, has been
taken or made by, or relates to information supplied by, such Indemnifying Party
or Indemnified Party, and the parties' relative intent, knowledge, access to
information and opportunity to correct or prevent such action, statement or
omission. The amount paid or payable by a party as a result of any Losses shall
be deemed to include, subject to the limitations set forth in Section 6(c), any
attorneys' or other fees or expenses incurred by such party in connection with
any Proceeding to the extent such party would have been indemnified for such
fees or expenses if the indemnification provided for in this Section was
available to such party in accordance with its terms. The parties hereto agree
that it would not be just and equitable if contribution pursuant to this Section
6(d) were determined by pro rata allocation or by any other method of allocation
that does not take into account the equitable considerations referred to in the
immediately preceding paragraph. Notwithstanding the provisions of this Section
6(d), the Purchaser shall not be required to contribute, in the aggregate, any
amount in excess of the amount by which the proceeds actually received by the
Purchaser from the sale of the Registrable Securities subject to the Proceeding

                                      -14-
<PAGE>

exceeds the amount of any damages that the Purchaser 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 Per-son who was not guilty of such fraudulent
misrepresentation.

          e.   Cumulative. The indemnity and contribution agreements contained
               ----------
in this Section are in addition to any liability that the Indemnifying Parties
may have to the Indemnified Parties.

     7.   Reports Under The 1934 Act.  With a view to making available to the
          --------------------------
Investors the benefits of Rule 144 promulgated under the  Securities Act or any
other similar rule or regulation of the SEC 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.   make and keep public information available, as those terms are
understood and defined in Rule 144;

          b.   file with the SEC in a timely manner all reports and other
documents required of the Company under the Securities Act and the 1934 Act so
long as the Company remains subject to such requirements (it being understood
that nothing herein shall limit the Company's obligations under Section 3.3 of
the Purchase Agreement) and the filing of such reports and other documents is
required for the applicable provisions of Rule 144; and

          c.   furnish to each Investor so long as such Investor owns
Registrable Securities, promptly upon request, (i) a written statement by the
Company that it has complied with the reporting requirements of the 1934 Act or,
if applicable, that there is publicly available the information concerning the
Company described in Rule 144(C)(2), (ii) unless available on the EDGAR system,
a copy of the most recent annual or quarterly report of the Company and such
other reports and documents so filed by the Company, and (iii) such other
information as may be reasonably requested to permit the investors to sell such
securities pursuant to Rule 144 without registration.

     9.   Assignment Of Registration Rights. The rights under this Agreement
          ---------------------------------
shall be automatically assignable by the Investors to any transferee of all or
any portion of Registrable Securities if: (i) the Investor agrees in writing
with the transferee or assignee to assign such rights, and a copy of such
agreement is furnished to the Company within a reasonable time after such
assignment; (ii) the Company is, within a reasonable time after such transfer or
assignment, furnished with written notice of (a) the name and address of such
transferee or assignee, and (b) the securities with respect to which such
registration rights are being transferred or assigned; (iii) immediately
following such transfer or assignment the further disposition of such securities
by the transferee or assignee is restricted under the  Securities Act and
applicable state securities laws; (iv) at or before the time the Company
receives the written notice contemplated by clause (ii) of this

                                      -15-
<PAGE>

sentence the transferee or assignee agrees in writing with the Company to be
bound by all of the provisions contained herein; and (v) such transfer shall
have been made in accordance with the applicable requirements of the Purchase
Agreement.

     10.  Amendment Of Registration Rights.  Provisions of this Agreement may be
          --------------------------------
amended and the observance thereof may be waived (either generally or in a
particular instance and either retroactively or prospectively), only with the
written consent of the Company and Investors who then hold two-thirds (2/3) of
the Registrable Securities.  Any amendment or waiver effected in accordance with
this Section 10 shall be binding upon each Investor and the Company. No such
amendment shall be effective to the extent that it applies to less than all of
the holders of the Registrable Securities. No consideration shall be offered or
paid to any Person to amend or consent to a waiver or modification of any
provision of any of this Agreement unless the same consideration also is offered
to all of the parties to this Agreement.

     11.  No Inconsistent Agreements.  Except as and to the extent specifically
          --------------------------
set forth in Schedule 11 attached hereto, the Company has not, as of the date
             -----------
hereof, nor shall the Company, on or after the date of this Agreement, enter
into any agreement with respect to its securities that is inconsistent with the
rights granted to the Investors in this Agreement or otherwise conflicts with
the provisions hereof.  Except and to the extent specifically set forth on

Schedule 11 attached hereto, neither the Company nor any of its subsidiaries has
-----------
previously entered into any agreement, which is still in effect, granting any
registration rights with respect to any of its securities to any Person.

     12.  Miscellaneous.
          -------------

          a.   A Person is deemed to be a holder of Registrable Securities
whenever such Person owns or is deemed to own of record such Registrable
Securities. If the Company receives conflicting instructions, notices or
elections from two or more Persons with respect to the same Registrable
Securities, the Company shall act upon the basis of instructions, notice or
election received from the registered owner of such Registrable Securities.

          b.   Any notices, consents, waivers or other communications required
or permitted to be given under the terms of this Agreement must be in writing
and will be deemed to have been delivered: (i) upon receipt, when delivered
personally; (ii) upon receipt, when sent by facsimile (provided confirmation of
transmission is mechanically or electronically generated and kept on file by the
sending party); or (iii) one business day after deposit with a nationally
recognized overnight delivery service, in each case properly addressed to the
party to receive the same. The addresses and facsimile numbers for such
communications shall be:

               If to the Company:

               BRITESMILE, INC.
               490 North Wiget Lane

                                      -16-
<PAGE>

               Walnut Creek, California  94598
               Facsimile No.: (925) 941-6266
               Attn: Paul A. Boyer, Chief Financial Officer

               With copies to:

               DURHAM JONES & PINEGAR, P.C.
               Broadway Centre, Suite 900
               111 East Broadway
               Salt Lake City, Utah  84111
               Facsimile No.:  (801) 415-3500
               Attn:  Jeffrey M. Jones

If to a Purchaser, to it at the address and facsimile number set forth below
adjacent to their names on Exhibit A hereto, with copies to such Purchaser's
                           ---------
representatives as set forth on Exhibit A, or at such other address and/or
                                ---------
facsimile number and/or to the attention of such other person as the recipient
party has specified by written notice given to each other party five days prior
to the effectiveness of such change.  Written confirmation of receipt (A) given
by the recipient of such notice, consent, waiver or other communication, (B)
mechanically or electronically generated by the sender's facsimile machine
containing the time, date, recipient facsimile number and an image of the first
page of such transmission or (C) provided by a nationally recognized overnight
delivery service shall be rebuttable evidence of personal service, receipt by
facsimile or receipt from a nationally recognized overnight delivery service in
accordance with clause (i), (ii) or (iii) above, respectively.

          c.   Failure of any party to exercise any right or remedy under this
Agreement or otherwise, or delay by a party in exercising such right or remedy,
shall not operate as a waiver thereof.

          d.   All questions concerning the construction, validity, enforcement
and interpretation of this Agreement shall be governed by the internal laws of
the State of New York, without giving effect to any choice of law or conflict of
law provision or rule (whether of the State of New York or any other
jurisdictions) that would cause the application of the laws of any jurisdictions
other than the State of New York. Each party hereby irrevocably submits to the
non-exclusive jurisdiction of the state and federal courts sitting in New York
City, Borough of Manhattan, State of New York, for the adjudication of any
dispute hereunder or in connection herewith or with any transaction contemplated
hereby or discussed herein, and hereby irrevocably waives, and agrees not to
assert in any suit, action or proceeding, any claim that it is not personally
subject to the jurisdiction of any such court, that such suit, action or
proceeding is brought in an inconvenient forum or that the venue of such suit,
action or proceeding is improper. Each party hereby irrevocably waives personal
service of process and consents to process being served in any such suit, action
or proceeding by mailing a copy thereof to such party at the address for such
notices to it under this Agreement and agrees that such service shall constitute
good and sufficient service of process and notice thereof. Nothing

                                      -17-
<PAGE>

contained herein shall be deemed to limit in any way any right to serve process
in any manner permitted by law. If any provision of this Agreement shall be
invalid or unenforceable in any jurisdiction, such invalidity or
unenforceability shall not affect the validity or enforceability of the
remainder of this Agreement in that jurisdiction or the validity or
enforceability of any provision of this Agreement in any other jurisdiction.
EACH PARTY HEREBY IRREVOCABLY WAIVES ANY RIGHT IT MAY HAVE, AND AGREES NOT TO
REQUEST, A JURY TRIAL FOR THE ADJUDICATION OF ANY DISPUTE HEREUNDER OR IN
CONNECTION HEREWITH OR ARISING OUT OF THIS AGREEMENT OR ANY TRANSACTION
CONTEMPLATED HEREBY.

          e.   This Agreement, the Purchase Agreement, the Warrants, the Notes
and the Placement Agent Warrant are the entire agreement among the parties
hereto with respect to the subject matter hereof and thereof. There are no
restrictions, promises, warranties or undertakings, other than those set forth
or referred to herein and therein. This Agreement, the Purchase Agreement, the
Warrants, the Placement Agent Warrant and the Notes supersede all prior
agreements and understandings among the parties hereto with respect to the
subject matter hereof and thereof.

          f.   Subject to the requirements of Section 9, this Agreement shall
inure to the benefit of and be binding upon the permitted successors and assigns
of each of the parties hereto.

          g.   The headings in this Agreement are for convenience of reference
only and shall not limit or otherwise affect the meaning hereof.

          h.   This Agreement may be executed in identical counterparts, each of
which shall be deemed an original but all of which shall constitute one and the
same agreement. This Agreement, once executed by a party, may be delivered to
the other party hereto by facsimile transmission of a copy of this Agreement
bearing the signature of the party so delivering this Agreement.

          i.   Each party shall do and perform, or cause to be done and
performed, all such further acts and things, and shall execute and deliver all
such other agreements, certificates, instruments and documents, as the other
party may reasonably request in order to carry out the intent and accomplish the
purposes of this Agreement and the consummation of the transactions contemplated
hereby.

          j.   All consents and other determinations to be made by the Investors
pursuant to this Agreement shall be made, unless otherwise specified in this
Agreement, by Investors holding a majority of the Registrable Securities,
determined as if all of the Notes and the Warrants then outstanding have been
converted into or exercised for Registrable Securities without regard to any
limitation on conversions of the Notes or exercises of the Warrants.

                                      -18-
<PAGE>

          k.   The language used in this Agreement will be deemed to be the
language chosen by the parties to express their mutual intent and no rules of
strict construction will be applied against any party.

                 [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]

                           [SIGNATURE PAGE FOLLOWS]

                                      -19-
<PAGE>

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

COMPANY:                                     PLACEMENT AGENT:

BRITESMILE, INC.                             FLEETBOSTON ROBERTSON
                                             STEPHENS

By: ____________________________             By: _________________________
     Name:                                        Name:
     Title:                                       Title:

Purchasers:

LCO INVESTMENTS LIMITED

By: ____________________________
     Its:_______________________

________________________________
ANDREW McKELVEY

PEQUOT PRIVATE EQUITY FUND II, L.P.

BY: PEQUOT CAPITAL MANAGEMENT, INC.
     ITS:  INVESTMENT MANAGER

By: ________________________________________
     Kevin E. O'Brien, General Counsel

<PAGE>

PEQUOT PARTNERS FUND, L.P.

BY: PEQUOT CAPITAL MANAGEMENT, INC.
     ITS:  INVESTMENT MANAGER

By: ________________________________________
     Kevin E. O'Brien, General Counsel

PEQUOT INTERNATIONAL FUND, INC.

BY: PEQUOT CAPITAL MANAGEMENT, INC.
     ITS:  INVESTMENT ADVISOR

By: ________________________________________
     Kevin E. O'Brien, General Counsel

__________________________________
JOHN REED

__________________________________
GASPER LAZZARA, JR., D.D.S.

                                      -21-
<PAGE>

CAPEX, L.P.

By  RBP, LLC
Its General Partner

By: ______________________________
     Evan Zucker
     Managing Partner

PACIFIC MEZZANINE FUND

By  PACIFIC PRIVATE CAPITAL

By: ____________________________________
     Nathan  W. Bell, Managing Partner

                                      -22-
<PAGE>

                                  Schedule 11
                           Other Registration Rights
                           -------------------------

                         REGISTRATION RIGHTS AGREEMENTS

1.   Registration Rights Agreement dated as of January 18, 2000 between the
     Company and the Pequot Capital investment funds (incorporated by reference
     to the Company's Current Report on Form 8-K dated January 18, 2000).

2.   Amendment No. 1 dated February 1, 2000 to Registration Rights Agreement
     dated as of June 3, 1999 between the Company and Quota Rabbico II, Ltd.,
     David E. Gerstenhaber and Argonaut Partnership, L.P., and between the
     Company and Andrew McKelvey.

3.   Registration Rights Agreement dated as of June 3, 1999 between the Company
     and certain non-management purchasers in the June 1999 Private Placement
     (incorporated by reference to the Company's Current Report on Form 8-K
     dated June 4, 1999).

4.   Amended and Restated Registration Rights Agreement dated as of June 3, 1999
     between the Company and certain management purchasers (incorporated by
     reference to the Company's Current Report on Form 8-K as filed June 4,
     1999).

5.   Amendment dated 12-7-98 to Registration Rights Agreement dated May 4, 1998
     between the Company and LCO Investments Limited (incorporated by reference
     to the Company's Current Report on Form 8-K filed December 22, 1998).

6.   Registration Rights Agreement dated as of May 4, 1998 between the Company
     and LCO Investments Limited (incorporated by reference to the Company's
     Annual Report on Form 10-KSB for the fiscal year ended March 31, 1998).

7.   Registration Rights Agreement dated May 8, 1997 among the Company, LCO
     Investments Limited, and Richard S. Braddock (incorporated by reference to
     the Company's Annual Report on Form 10-KSB for the fiscal year ended March
     31, 1997).

8.   Registration Rights Agreement dated April 1, 1996 between the Company, LCO
     Investments Limited, Richard S. Braddock, and Pinnacle Fund, L.P.
     (incorporated by reference to the Current Report on Form 8-K of the Company
     dated April 1, 1996).

                                      -23-

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00023-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00023-of-00352.parquet"}]]