[MILESTONE SCIENTIFIC LETTERHEAD]



September 3, 2003



Strider
106 Hart Road
Gaithersburg, MD 20878

Attn: Richard Brown


Dear Richard:

         This will confirm our agreement to pay you commissions for any future
sales made by us of products purchased from Da Vinci Systems ("Da Vinci")
including the "Nova Cordless Curing Light" (the "Products").

         1. In consideration for your assistance in reaching a distribution
agreement between Da Vinci and us, we hereby agree to pay you the following
commissions:

               1.1  We will pay 2% of net sales (less returns, discounts and
                    allowances) on all Products purchased from Da Vinci and
                    resold by us directly, or indirectly to dentists, hygienists
                    or other health care professionals providing dental services
                    ("Professional Dental Market"), including sales through
                    distributors, agents or wholesale suppliers.

               1.2  We will pay 5% of net sales (less returns, discounts and
                    allowances) on all Products purchased from Da Vinci and
                    resold by us directly, or indirectly for use in any other
                    market other than the Professional Dental Market, including
                    sales through distributors, agents or wholesale suppliers.

         2. In consideration for your assistance in financing the final
development of the whitening head product with Da Vinci and us, we hereby agree
to pay you the following:

               2.1  We will pay an additional 2% of net sales on Products
                    purchased from Da Vinci and resold by us directly, or
                    indirectly to dentists, hygienists or other health care
                    professionals providing dental services and 5% of net sales
                    on all Products purchased from Da Vinci and resold by us
                    directly, or indirectly for use in any other market other
                    than the Professional Dental Market until such time as a
                    total amount of $25,500 is attained.

Payments will be made within 30 days following the end of each calendar quarter,
with respect to all revenues collected by us from Product sales during the
previous calendar quarter.







                                                                     Page 2 of 2

[MILESTONE SCIENTIFIC LOGO]


     3.   The term of this agreement shall be for seven years beginning on the
          date hereof.


     4.   All notices or other communications given with respect to this
          agreement shall be in writing and shall be valid and sufficient if
          dispatched by registered mail, postage prepaid, addressed to the
          address indicated in this Agreement or to such other address as the
          addressee shall have theretofore furnished to the addressor as
          indicated below.

     5.   This agreement represents the entire agreement between the parties and
          may not be changed, amended or modified except by a writing signed by
          both parties.

     6.   In the event of any dispute between us, we agree that it shall be
          resolved through arbitration in New York under the regulations of the
          American Arbitration Association, within ninety (90) days following
          termination of this Agreement. Any award rendered shall be final and
          conclusive upon the parties. This Agreement shall be construed under
          the laws of the State of New York.



                                             Very truly yours,

                                             MILESTONE SCIENTIFIC INC.


                                             by: /s/ Leonard Osser
                                                 -----------------
                                             Leonard Osser, CEO


Accepted and agreed to the
8th day of September 2003

Strider
by: /s/ Richard Brown
    -----------------
        Richard Brown