SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  SCHEDULE 13G
                                 (Rule 13d-102)

           INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO
      RULES 13d-1(b) (c), AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO
                                 RULE 13d-2(b)
                               (Amendment No. 2)1

                         Regeneration Technologies, Inc.
--------------------------------------------------------------------------------
                                (Name of Issuer)

                                  Common Stock
--------------------------------------------------------------------------------
                         (Title of Class of Securities)

                                   75886N 10 0
--------------------------------------------------------------------------------
                                 (CUSIP Number)

                               December 31, 2004
--------------------------------------------------------------------------------
             (Date of Event Which Requires Filing of this Statement)


Check  appropriate  box to designate the rule pursuant to which this Schedule is
filed:

[ ]  Rule 13d-1(b)

[X]  Rule 13d-1(c)

[ ]  Rule 13d-1(d)




---------------

     1The  remainder  of this cover  page  shall be filled  out for a  reporting
person's  initial  filing on this  form with  respect  to the  subject  class of
securities,  and for any subsequent amendment containing information which would
alter the disclosures provided in a prior cover page.

     The  information  required in the remainder of this cover page shall not be
deemed to be "filed"  for the purpose of Section 18 of the  Securities  Exchange
Act of 1934 ("Act") or otherwise  subject to the  liabilities of that section of
the Act but shall be subject to all other  provisions of the Act  (however,  see
the Notes).





--------------------------                              ------------------------

CUSIP NO. 75886N 10 0                                    Page  2  of  7  Pages
          -----------                                         --      -       
--------------------------                              ------------------------

--------------------------------------------------------------------------------
1                                     NAME OF REPORTING PERSON
                                      S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE
                                      PERSON (ENTITIES ONLY)

                                      Neil Gagnon
--------------------------------------------------------------------------------
2                                     CHECK THE APPROPRIATE BOX IF A MEMBER OF A
                                      GROUP*
                                                (a) [ ]
                                                (b) [X]
--------------------------------------------------------------------------------
3                                     SEC USE ONLY

--------------------------------------------------------------------------------
4                                     CITIZENSHIP OR PLACE OF ORGANIZATION

                                      United States of America
--------------------------------------------------------------------------------
                       5              SOLE VOTING POWER

                                      721,860
                       ---------------------------------------------------------
      NUMBER OF        6              SHARED VOTING POWER
       SHARES
    BENEFICIALLY                      398,068
      OWNED BY         ---------------------------------------------------------
        EACH           7              SOLE DISPOSITIVE POWER
      REPORTING
       PERSON                         669,650
        WITH           ---------------------------------------------------------
                       8              SHARED DISPOSITIVE POWER

                                      1,481,348
--------------------------------------------------------------------------------
9                      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH
                       REPORTING PERSON

                       2,150,998
--------------------------------------------------------------------------------
10                     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES
                       CERTAIN SHARES* [ ]
--------------------------------------------------------------------------------
11                     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

                       8.0%
--------------------------------------------------------------------------------




--------------------------------------------------------------------------------
12                     TYPE OF REPORTING PERSON*

                       IN
--------------------------------------------------------------------------------

                      *SEE INSTRUCTION BEFORE FILLING OUT!





Item 1(a)    Name of Issuer:

         Regeneration Technologies, Inc.

Item 1(b)    Address of Issuer's Principal Executive Offices:

         11621 Research Circle
         Alachua, Florida 32615

Item 2(a)    Name of Person Filing:

         Neil Gagnon

Item 2(b)    Address of Principal Business Office or, if none, Residence:

         1370 Avenue of the Americas
         Suite 2002
         New York, NY 10019

Item 2(c)    Citizenship:

         United States of America

Item 2(d)    Title of Class of Securities:

         Common Stock

Item 2(e)    CUSIP Number:

         75886N 10 0

Item 3       If this Statement is Filed Pursuant to Rule 13d-1(b), or 13d-2(b)
             or (c), Check Whether the Person Filing is a:

         Not Applicable

Item 4   Ownership.

Item 4(a)    Amount Beneficially Owned:

     As of December 31, 2004, Neil Gagnon beneficially owned 2,150,998 shares of
Common Stock of  Regeneration  Technologies,  Inc.,  which  amount  includes (i)
424,045  shares  beneficially  owned by Mr. Gagnon over which he has sole voting
and sole dispositive power; (ii) 49,765 shares  beneficially owned by Mr. Gagnon
over which he has sole voting power and shared dispositive






power;  (iii) 225,992 shares  beneficially  owned by Lois Gagnon,  Mr.  Gagnon's
wife, over which he has shared voting and shared  dispositive  power; (iv) 4,255
shares  beneficially  owed by Mr.  Gagnon and Mrs.  Gagnon as Joint Tenants with
Rights of Survivorship,  over which he has shared voting and shared  dispositive
power; (v) 87,130 shares held by the Lois E. and Neil E. Gagnon  Foundation (the
"Foundation"),  of which Mr.  Gagnon is a trustee  and over  which he has shared
voting and shared  dispositive  power;  (vi)  80,691  shares  held by the Gagnon
Family Limited  Partnership (the "Partnership") of which Mr. Gagnon is a partner
and over which he has shared voting and shared  dispositive  power; (vii) 65,448
shares  held by the  Gagnon  Grandchildren  Trust (the  "Trust")  over which Mr.
Gagnon has shared dispositive but no voting power; (viii) 242,523 shares held by
a hedge fund (of which Mr.  Gagnon is a general  partner)  over which Mr. Gagnon
has sole dispositive and sole voting power; (ix) 3,082 shares held by the Gagnon
Securities  LLC P/S Plan (the  "Plan") (of which Mr.  Gagnon is a Trustee)  over
which Mr. Gagnon has sole  dispositive  and sole voting power;  (x) 2,445 shares
held by the Plan,  over which Mr. Gagnon has shared  dispositive and sole voting
power; and (xi) 965,622 shares held for certain  customers of Gagnon  Securities
LLC (of which Mr. Gagnon is the Managing  Member and the  principal  owner) over
which Mr. Gagnon has shared dispositive but no voting power.

Item 4(b)    Percent of Class:

     8.0%  beneficially  owned  by Mr.  Gagnon.  Calculation  of  percentage  of
beneficial  ownership  is based on  26,634,763  shares of Issuer's  Common Stock
outstanding  on  November  1, 2004 as  reported  by the Issuer in its  Quarterly
Report filed on Form 10-Q for the period ended September 30, 2003.

Item 4(c) Number of shares as to which such person has:

     (i) sole power to vote or to direct the vote: 721,860

     (ii) shared power to vote or to direct the vote: 398,068

     (iii) sole power to dispose or to direct the disposition of: 669,650

     (iv) shared power to dispose or to direct the disposition of: 1,481,348

Items 5-9    Not applicable.

     Filing of this  statement  by the  Reporting  Person shall not be deemed an
admission that he  beneficially  owns the securities  reported herein as held in
customer  accounts  at  Gagnon   Securities  LLC  or  by  the  Foundation,   the
Partnership,  the Trust or the Plan. Mr. Gagnon expressly  disclaims  beneficial
ownership of all securities held in such customer accounts or by the Foundation,
the Partnership,  the Trust or the Plan. No single client's interest as reported
in the customer  accounts at Gagnon Securities LLC exceeds 5% of the outstanding
Common Stock.




Item 10      Certification.

     By signing  below I certify  that,  to the best of my knowledge and belief,
the  securities  referred  to above were not  acquired  and are not held for the
purpose of or with the effect of  changing  or  influencing  the  control of the
issuer of the  securities  and were not acquired and are not held in  connection
with or as a participant in any transaction having that purpose or effect.





                                    SIGNATURE

     After  reasonable  inquiry and to the best of my  knowledge  and belief,  I
certify that the information  set forth in this statement is true,  complete and
correct.


                                                     January 25, 2005
                                                     ---------------------------
                                                     Date


                                                     /s/ Neil Gagnon
                                                     ---------------------------
                                                     Neil Gagnon