Exhibit A

13G

JOINT FILING AGREEMENT

This will confirm the agreement by and among the undersigned that the Schedule 13G filed with the Securities and Exchange Commission on or about the date hereof with respect to the beneficial ownership by the undersigned of the shares of Common Stock, par value $0.01, of LVB Acquisition, Inc., is being filed, and all amendments thereto will be filed, on behalf of each of the persons and entities named below in accordance with Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended. This Agreement may be executed in two or more counterparts, each of which shall be deemed an original, but all of which together shall constitute one and the same instrument.

Dated:  February 14, 2012

KKR 2006 FUND L.P.
By: KKR Associates 2006 L.P., its sole general partner
By: KKR 2006 GP LLC, its sole general partner
By:	/s/Richard J. Kreider
Name: Richard J. Kreider
Title: Attorney-in-fact for William J. Janetschek, Chief Financial Officer
KKR BIOMET LLC
By:	/s/Richard J. Kreider
Name: Richard J. Kreider
Title: Attorney-in-fact for William J. Janetschek, Vice President
KKR PEI INVESTMENTS, L.P.
By: KKR PEI Associates L.P., its sole general partner
By: KKR PEI GP Limited, its sole general partner
By:	/s/Richard J. Kreider
Name: Richard J. Kreider
Title: Attorney-in-fact for William J. Janetschek, Director

1

13G

8 NORTH AMERICA INVESTOR L.P.
By: KKR Associates 8 NA L.P., its sole general partner
By: KKR 8 NA Limited, its sole general partner
By:	/s/Richard J. Kreider
Name: Richard J. Kreider
Title: Attorney-in-fact for William J. Janetschek, Director
OPERF CO-INVESTMENT LLC
By: KKR Associates 2006 L.P., its sole general partner
By: KKR 2006 GP LLC, its sole general partner
By:	/s/Richard J. Kreider
Name: Richard J. Kreider
Title: Attorney-in-fact for William J. Janetschek, Chief Financial Officer
KKR PARTNERS III, L.P.
By: KKR III GP LLC, its sole general partner
By:	/s/Richard J. Kreider
Name: Richard J. Kreider
Title: Attorney-in-fact for Henry R. Kravis, Manager

2

13G

KKR ASSOCIATES 2006 L.P.
By: KKR 2006 GP LLC, its sole general partner
By:	/s/Richard J. Kreider
Name: Richard J. Kreider
Title: Attorney-in-fact for William J. Janetschek, Chief Financial Officer
KKR 2006 GP LLC
By:	/s/Richard J. Kreider
Name: Richard J. Kreider
Title: Attorney-in-fact for William J. Janetschek, Chief Financial Officer
KKR PEI ASSOCIATES, L.P.
By: KKR PEI GP Limited, its sole general partner
By:	/s/Richard J. Kreider
Name: Richard J. Kreider
Title: Attorney-in-fact for William J. Janetschek, Director
KKR PEI GP LIMITED
By:	/s/Richard J. Kreider
Name: Richard J. Kreider
Title: Attorney-in-fact for William J. Janetschek, Director

3

13G

KKR ASSOCIATES 8 NA L.P.
By: KKR 8 NA Limited, its sole general partner
By:	/s/Richard J. Kreider
Name: Richard J. Kreider
Title: Attorney-in-fact for William J. Janetschek, Director
KKR 8 NA LIMITED
By:	/s/Richard J. Kreider
Name: Richard J. Kreider
Title: Attorney-in-fact for William J. Janetschek, Director
KKR FUND HOLDINGS L.P.
By: KKR Fund Holdings GP Limited, its general partner
By:	/s/Richard J. Kreider
Name: Richard J. Kreider
Title: Attorney-in-fact for William J. Janetschek, Director
KKR FUND HOLDINGS GP LIMITED
By:	/s/Richard J. Kreider
Name: Richard J. Kreider
Title: Attorney-in-fact for William J. Janetschek, Director
KKR GROUP HOLDINGS L.P.
By: KKR Group Limited, its general partner
By:	/s/Richard J. Kreider
Name: Richard J. Kreider
Title: Attorney-in-fact for William J. Janetschek, Director

4

13G

KKR GROUP LIMITED
By:	/s/Richard J. Kreider
Name: Richard J. Kreider
Title: Attorney-in-fact for William J. Janetschek, Director
KKR & CO. L.P.
By: KKR Management LLC, its general partner
By:	/s/Richard J. Kreider
Name: Richard J. Kreider
Title: Attorney-in-fact for William J. Janetschek, Chief Financial Officer
KKR MANAGEMENT LLC
By:	/s/Richard J. Kreider
Name: Richard J. Kreider
Title: Attorney-in-fact for William J. Janetschek, Chief Financial Officer

5

13G

KKR III GP LLC
By:	/s/Richard J. Kreider
Name: Richard J. Kreider
Title: Attorney-in-fact for Henry R. Kravis, Manager
HENRY R. KRAVIS
By:	/s/Richard J. Kreider
Name: Richard J. Kreider
Title: Attorney-in-fact
GEORGE R. ROBERTS
By:	/s/Richard J. Kreider
Name: Richard J. Kreider
Title: Attorney-in-fact

6