News Release

Contacts:

Integra LifeSciences Holdings Corporation

John Bostjancic                            Maria Platsis
Vice President, Corporate Controller       Senior Director of Investor Relations
(609) 936-2239                             and Corporate Development
jbostjancic@Integra-LS.com                 (609) 936-2333
                                           mplatsis@Integra-LS.com


              Integra LifeSciences Reports Fourth Quarter and
                     Full Year 2004 Financial Results


Plainsboro,   New  Jersey,  March  13,  2005  -  Integra  LifeSciences  Holdings
Corporation (NASDAQ:  IART) today reported its fourth quarter and full year 2004
revenues and earnings. Product revenues in the fourth quarter of 2004 were $61.8
million,  reflecting  an  increase  of $14.9  million,  or 32%,  over the fourth
quarter of 2003.  Product  revenues  for the full year ended  December  31, 2004
increased by $61.8  million to $228.5  million,  a 37%  increase  over the prior
year.

Excluding recently acquired product lines,  fourth quarter 2004 product revenues
increased by $9.2  million,  or 20%,  over the prior year period,  and full year
2004 product revenues increased by $32.7 million, or 23%, over the prior year.

Total  revenues  for the  quarter  increased  over the prior year period by $2.8
million to $61.8  million.  Total  revenues for the full year ended December 31,
2004 increased by $44.2 million to $229.8 million.

We reported  net income of $9.8  million,  or $0.30 per diluted  share,  for the
fourth  quarter of 2004,  compared to net income of $9.2  million,  or $0.28 per
diluted  share in the  fourth  quarter  of 2003.  Net  income for the year ended
December 31, 2004 was $17.2  million,  or $0.55 per diluted  share,  compared to
$26.9 million, or $0.86 per diluted share, for the year ended December 31, 2003.

"We are very  pleased  with our  performance  in the fourth  quarter and for the
year," said Stuart M. Essig,  Integra's  President and Chief Executive  Officer.
"Organic  revenue  growth  exceeded  our  long-term  objective  of 18%,  and our
corporate gross margin continued to build in keeping with our expectations. More
importantly,  we  transformed  Integra  LifeSciences  this  year in the  area of
information technology.  Our continuing implementation of an enterprise business
system  will  streamline  our  ability  to grow  both  organically  and  through
acquisitions  and strategic  partnerships.  We have made good on our ambition to
accelerate  product  development,  having  launched  significant new products in
dural regeneration, adhesion prevention, nerve repair, neuromonitoring,  cranial
reconstruction and shunting for normal pressure  hydrocephalus.  We continued to
cut costs and improve margins  through plant  consolidations.  Finally,  we have
focused our Reconstructive Surgery sales force on the extremities, with exciting
new products in the treatment of wounds and the surgical  reconstruction  of the
foot and ankle."

This quarter,  as required by the recently  adopted  Emerging  Issues Task Force
(EITF) Issue No. 04-08,  The Effect of Contingently  Convertible Debt on Diluted
Earnings per Share, we treated the unissued shares  underlying our  contingently
convertible  notes  issued  in March  2003 as if such  shares  were  issued  and
outstanding,  using the  "if-converted"  accounting  method, for the purposes of
calculating  earnings  per share.  As also  required by EITF 04-08,  we restated
diluted  earnings  per share for all prior  periods back to the issuance of this
debt to conform to this new accounting standard.

<page>

The  adoption of EITF 04-08  reduced  earnings per share by $0.01 for the fourth
quarter ended  December 31, 2004,  and by $0.02 for both the fourth  quarter and
year ended  December  31,  2003.  It had no impact on earnings per share for the
full year 2004.

Our revenues for the periods were as follows:


<table>
<caption>
                                           Three Months                     Year
                                        Ended December 31,           Ended December 31,
                                       2004           2003        2004             2003
                                       ----           ----        ----             ----

         <s>                         <c>           <c>           <c>               <c>
         Product Revenue:
         Monitoring products         $12,517       $11,466       $48,217        $44,229
         Implants                     19,851        14,325        78,418         53,301
         Instruments                  22,685        15,422        77,667         47,168
         Private label products        6,709         5,648        24,188         21,997
                                      ------        ------       -------         ------
            Total Product Revenue     61,762        46,861       228,490        166,695

         Other revenue                    49        12,164         1,335         18,904
                                      ------        ------       -------        -------
            Total Revenue            $61,811       $59,025      $229,825       $185,599

</table>

Increased sales of our drainage  systems and intracranial  monitoring  products,
including our Camino(R) and LICOX(R)  monitoring  systems,  provided most of the
year-over-year growth in monitoring product revenues.

Continued  strong  year-over-year  growth in sales of our DuraGen(R) Dural Graft
Matrix,  DuraGen  Plus(TM)  Dural  Regeneration  Matrix,  and our CSF management
products,  and direct selling of the INTEGRA(R) Dermal Regeneration Template and
INTEGRA(TM)  Bilayer Matrix Wound Dressing accounted for most of the increase in
implant product revenues.

Sales of  recently  acquired  product  lines  contributed  $5.7  million  of the
year-over-year increase in instrument revenues for the fourth quarter. Increased
sales of our JARIT(R) and  Ruggles(TM)  surgical  instrument  lines provided the
remainder of the growth in instrument product revenues.

The increase in revenues  attributable to our remaining  private label products,
including the Absorbable  Collagen  Sponge that we supply for use in Medtronic's
INFUSE(TM) bone graft product, more than offset the removal of INTEGRA(R) Dermal
Regeneration Template revenues from our private label products category.

Changes in foreign  currency  exchange  rates  contributed  $0.7  million to our
quarterly year-over-year product revenue growth.

Gross margin on product  revenues in the fourth  quarter of 2004 was 62.4%.  Our
gross margin was positively  affected by changes in the mix of our products sold
during the  quarter  and by the  resumption  of direct  sales of the  INTEGRA(R)
Dermal Regeneration Template in 2004.

Research  and  development  expense  decreased  from $4.8  million in the fourth
quarter of 2003 to $3.6  million in the  current  period.  Selling,  general and
administrative  expense increased by $0.9 million to $20.3 million in the fourth
quarter of 2004,  but decreased as a percentage of product  revenues to 33% from
41% in the prior year period. Selling, general and administrative expense in the
fourth  quarter  of 2004  included  costs  associated  with the  closing  of our
distribution  facility in New Jersey and the transfer of distribution  functions
to Nevada,  and  additional  spending on Integra's  enterprise  business  system
implementation and Sarbanes-Oxley 404 compliance activities.

<page>

We reported net  interest  income of $95,000 in the fourth  quarter of 2004,  as
compared  to net  interest  income of $81,000 in the prior  year  period.  Other
income in the  fourth  quarter  of 2004 was $2.3  million  and  included  a $1.4
million  gain  related to the change in the fair value of the  foreign  exchange
collar  contract we executed in November 2004 upon  agreeing to acquire  Newdeal
Technologies SA.

Our cash and investments totaled $196.0 million at December 31, 2004.

We are updating our expectations  for total revenues,  gross margin and earnings
per share for 2005 and  providing  our initial  guidance for 2006. In accordance
with  our  usual  practice,   our  expectations  for  2005  and  2006  financial
performance  do not  include  the  impact  of  acquisitions  or other  strategic
corporate transactions that have not yet closed.

Total revenues in 2005 are expected to be between $290 million and $300 million.
Total revenues in 2006 are expected to be between $345 million and $355 million.
Consolidated  gross  margin  is  expected  to  increase  to 64% and 66% of total
revenues in 2005 and 2006, respectively. Earnings per diluted share are expected
to be within a range of $1.38 to $1.42 per share in 2005.  Earnings  per diluted
share are expected to be within a range of $1.65 to $1.75 per share in 2006. Our
guidance for the first quarter of 2005 is for total revenues in the range of $65
million to $68 million and  earnings  per diluted  share of $0.29 to $0.31.  Our
expectation ranges for full year 2005 and 2006 earnings per share do not reflect
the  impact  of  expensing  stock  options  beginning  July 1,  2005  under  the
accounting standard recently issued by the Financial  Accounting Standards Board
(FASB).

We have scheduled a conference call for 9:00 am EST tomorrow, March 14, 2005, to
discuss the financial results for the fourth quarter of 2004 and forward-looking
financial guidance.  The call is open to all listeners and will be followed by a
question  and answer  session.  Access to the live call is  available by dialing
(973) 935-8511 or through a listen-only  webcast via a link provided on the home
page of Integra's website at www.Integra-LS.com. A replay of the conference call
will be accessible  starting one hour  following  the live event.  Access to the
replay is available  through  March 28, 2005 by dialing (973)  341-3080  (access
code 5630772) or through the webcast accessible on our home page.

Integra  LifeSciences  Holdings  Corporation is a diversified medical technology
company that develops,  manufactures,  and markets  medical devices for use in a
variety  of  applications.   The  primary  applications  for  our  products  are
neuro-trauma  and  neurosurgery,  reconstructive  surgery and  general  surgery.
Integra is a leader in  applying  the  principles  of  biotechnology  to medical
devices that improve patients'  quality of life. Our corporate  headquarters are
in Plainsboro, New Jersey, and we have research,  manufacturing and distribution
facilities located throughout the world. We have approximately  1,200 employees.
Please visit our website at (http://www.Integra-LS.com).

This news release contains forward-looking  statements within the meaning of the
Private  Securities  Litigation Reform Act of 1995.  Forward-looking  statements
include,  but  are  not  limited  to,  statements  concerning  future  financial
performance,  including  projections for revenues,  gross margins,  earnings per
share  and  cash  flows.  Such  forward-looking  statements  involve  risks  and
uncertainties  that  could  cause  actual  results  to  differ  materially  from
predicted  or  expected  results.  Among other  things,  our ability to maintain
relationships  with customers of acquired entities,  physicians'  willingness to
adopt our  recently  launched  and  planned  products  and our ability to secure
regulatory  approval for products in development may adversely affect our future
product  revenues;  our  ability  to  increase  sales and  product  volumes  may
adversely  affect our future gross  margins;  our ability to integrate  acquired
businesses,  increase product sales and gross margins,  and control  non-product
costs may affect our earnings per share;  and our future net income  results and
our ability to  effectively  manage  working  capital may affect our future cash
flows. In addition, the economic, competitive,  governmental,  technological and
other factors  identified  under the heading "Factors That May Affect Our Future
Performance" included in the Business section of Integra's Annual Report on Form
10-K  for the  year  ended  December  31,  2003  and  information  contained  in
subsequent  filings with the  Securities  and Exchange  Commission  could affect
actual results.

<page>

Regulation G,  "Conditions  for Use of Non-GAAP  Financial  Measures," and other
provisions  of the  Securities  Exchange  Act of 1934,  as  amended,  define and
prescribe the conditions for the use of certain non-GAAP financial  information.
In this news release,  we provide  "quarterly  year-over-year  growth in product
revenues excluding  recently acquired product lines" and "annual  year-over-year
growth in product revenues excluding recently acquired product lines", which are
non-GAAP  financial  measures.  A  reconciliation  of these  non-GAAP  financial
measures  to the most  comparable  GAAP  measures  is  provided in the tables of
financial information contained at the end of this news release.

Non-GAAP  financial  measures should not be relied upon to the exclusion of GAAP
financial  measures.  Management believes that these non-GAAP financial measures
are important supplemental  information to investors which reflect an additional
way of viewing aspects of our operations that, when viewed with our GAAP results
and the accompanying reconciliations,  provides a more complete understanding of
factors and trends  affecting our ongoing  business and  operations.  Management
strongly  encourages  investors  to review our  financial  statements  and filed
reports  in their  entirety  and to not rely on any  single  financial  measure.
Because non-GAAP financial measures are not standardized, it may not be possible
to compare these financial  measures with other  companies'  non-GAAP  financial
measures having the same or similar names.

<page>

                     INTEGRA LIFESCIENCES HOLDINGS CORPORATION
                      (In thousands, except per share data)
                                   (UNAUDITED)
<table>
STATEMENT OF OPERATIONS DATA:
<caption>

                                                         Three Months
                                                      Ended December 31,
                                                     2004            2003
                                                     ----            ----
          <s>                                     <c>             <c>
          Product revenue                         $61,762         $46,861
          Other revenue                                49          12,164
                                                   ------          ------
          Total revenue                            61,811          59,025

          Cost of product revenue                  23,221          20,935
          Research and development                  3,556           4,772
          Selling, general and administrative      20,264          19,354
          Amortization                              1,139             968
                                                   ------          ------
          Total costs and expenses                 48,180          46,029

          Operating income                         13,631          12,996

          Interest income, net                         95              81
          Other income, net                         2,250           1,962
                                                   ------          ------

          Income before income taxes               15,976          15,039

          Provision for income taxes                6,137           5,867
                                                   ------          ------

          Net income                               $9,839          $9,172
                                                  =======         =======

          Diluted earnings per share                $0.30           $0.28

          Diluted weighted average
           common shares outstanding               34,842          34,174
</table>

<page>

                     INTEGRA LIFESCIENCES HOLDINGS CORPORATION
                      (In thousands, except per share data)
                                  (UNAUDITED)
<table>
STATEMENT OF OPERATIONS DATA:
<caption>

                                                               Year
                                                        Ended December 31,
                                                      2004              2003
                                                      ----              ----
          <s>                                     <c>               <c>
          Product revenue                         $228,490          $166,695
          Other revenue                              1,335            18,904
                                                   -------           -------
          Total revenue                            229,825           185,599

          Cost of product revenue                   87,299            70,598
          Research and development                  14,121            12,815
          Selling, general and administrative       99,360            59,459
          Amortization                               4,266             3,080
                                                   -------           -------
          Total costs and expenses                 205,046           145,952

          Operating income                          24,779            39,647

          Interest income, net                         555               471
          Other income, net                          2,674             3,071
                                                    ------            ------

          Income before income taxes                28,008            43,189

          Provision for income taxes                10,811            16,328
                                                   -------           -------

          Net income                               $17,197           $26,861
                                                   =======           =======

          Diluted earnings per share                 $0.55             $0.86

          Diluted weighted average
           common shares outstanding                31,102            33,104
</table>

<page>

                      INTEGRA LIFESCIENCES HOLDINGS CORPORATION
                       (In thousands, except per share data)
                                   (UNAUDITED)

<table>
CONDENSED BALANCE SHEET DATA:
<caption>

                                                   December 31,   December 31,
                                                       2004           2003
                                                       ----           ----

      <s>                                          <c>            <c>
      Cash and marketable securities,
         including non-current portion             $195,982       $206,743
      Accounts receivable, net                       46,765         28,936
      Inventory, net                                 55,947         41,046
      Total assets                                  456,713        412,526

      Current liabilities                            24,234         20,618
      Long-term debt                                118,900        119,257
      Total liabilities                             148,890        143,996
      Stockholders' equity                          307,823        268,530
</table>

<page>


RECONCILIATION OF NON-GAAP FINANCIAL MEASURE TO THE MOST COMPARABLE GAAP
MEASURE:


A.   Quarterly year-over-year growth in product revenues excluding recently
     acquired product lines

     Excluding recently acquired product lines, fourth quarter 2004 product
     revenues increased by $9.2 million, or 20%, over the prior year period.

<table>
<caption>
                                                     Quarter Ended
                                                      December 31,           Increase
                                                   2004          2003        $        %
                                                --------      --------   -------   -----
                                                             ($ in thousands)

     <s>                                        <c>           <c>        <c>        <c>
     Total product revenues, as reported        $ 61,762      $ 46,861   $14,901     32%
     Less: Product revenues acquired in 2004       5,249           --      5,249     N/A
           Product revenues acquired in 2003       1,158           721       437     61%
                                                --------      --------   -------   -----
     Product revenues excluding
          acquired products                     $ 55,355      $ 46,140   $ 9,215     20%

</table>


B.   Annual year-over-year growth in product revenues excluding recently
     acquired product lines

     Excluding recently acquired product lines, full year 2004 product revenues
     increased by $32.7 million, or 23%, over the prior year.

<table>
<caption>
                                                       Year Ended
                                                      December 31,           Increase
                                                  2004          2003        $        %
                                                --------      --------   -------   -----
                                                             ($ in thousands)

     <s>                                        <c>           <c>        <c>         <c>
     Total product revenues, as reported        $228,490      $166,695   $61,795     37%
     Less: Product revenues acquired in 2004      13,633           --     13,633     N/A
           Product revenues acquired in 2003      39,897        24,476    15,421     63%
                                                --------      --------   -------   -----
     Product revenues excluding
          acquired products                     $174,960      $142,219   $32,741     23%

</table>


Source: Integra LifeSciences Holdings Corporation