JOINT FILING AGREEMENT

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/Xxxxxxx X. Xxxxxxx
	Name: Xxxxxxx X. Xxxxxxx
	Title: Attorney-in-fact for Xxxxxxx X. Xxxxxxxxxx, Chief Financial Officer
	KKR BIOMET LLC
	By:	/s/Xxxxxxx X. Xxxxxxx
	Name: Xxxxxxx X. Xxxxxxx
	Title: Attorney-in-fact for Xxxxxxx X. Xxxxxxxxxx, 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/Xxxxxxx X. Xxxxxxx
	Name: Xxxxxxx X. Xxxxxxx
	Title: Attorney-in-fact for Xxxxxxx X. Xxxxxxxxxx, 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/Xxxxxxx X. Xxxxxxx
	Name: Xxxxxxx X. Xxxxxxx
	Title: Attorney-in-fact for Xxxxxxx X. Xxxxxxxxxx, 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/Xxxxxxx X. Xxxxxxx
	Name: Xxxxxxx X. Xxxxxxx
	Title: Attorney-in-fact for Xxxxxxx X. Xxxxxxxxxx, Chief Financial Officer
	KKR PARTNERS III, L.P.
	By: KKR III GP LLC, its sole general partner
	By:	/s/Xxxxxxx X. Xxxxxxx
	Name: Xxxxxxx X. Xxxxxxx
	Title: Attorney-in-fact for Xxxxx X. Xxxxxx, Manager

2

13G

	KKR ASSOCIATES 2006 L.P.
	By: KKR 2006 GP LLC, its sole general partner
	By:	/s/Xxxxxxx X. Xxxxxxx
	Name: Xxxxxxx X. Xxxxxxx
	Title: Attorney-in-fact for Xxxxxxx X. Xxxxxxxxxx, Chief Financial Officer
	KKR 2006 GP LLC
	By:	/s/Xxxxxxx X. Xxxxxxx
	Name: Xxxxxxx X. Xxxxxxx
	Title: Attorney-in-fact for Xxxxxxx X. Xxxxxxxxxx, Chief Financial Officer
	KKR PEI ASSOCIATES, L.P.
	By: KKR PEI GP Limited, its sole general partner
	By:	/s/Xxxxxxx X. Xxxxxxx
	Name: Xxxxxxx X. Xxxxxxx
	Title: Attorney-in-fact for Xxxxxxx X. Xxxxxxxxxx, Director
	KKR PEI GP LIMITED
	By:	/s/Xxxxxxx X. Xxxxxxx
	Name: Xxxxxxx X. Xxxxxxx
	Title: Attorney-in-fact for Xxxxxxx X. Xxxxxxxxxx, Director

3

13G

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

4

13G

	KKR GROUP LIMITED
	By:	/s/Xxxxxxx X. Xxxxxxx
	Name: Xxxxxxx X. Xxxxxxx
	Title: Attorney-in-fact for Xxxxxxx X. Xxxxxxxxxx, Director
	KKR & CO. L.P.
	By: KKR Management LLC, its general partner
	By:	/s/Xxxxxxx X. Xxxxxxx
	Name: Xxxxxxx X. Xxxxxxx
	Title: Attorney-in-fact for Xxxxxxx X. Xxxxxxxxxx, Chief Financial Officer
	KKR MANAGEMENT LLC
	By:	/s/Xxxxxxx X. Xxxxxxx
	Name: Xxxxxxx X. Xxxxxxx
	Title: Attorney-in-fact for Xxxxxxx X. Xxxxxxxxxx, Chief Financial Officer

5

13G

	KKR III GP LLC
	By:	/s/Xxxxxxx X. Xxxxxxx
	Name: Xxxxxxx X. Xxxxxxx
	Title: Attorney-in-fact for Xxxxx X. Xxxxxx, Manager
	XXXXX X. XXXXXX
	By:	/s/Xxxxxxx X. Xxxxxxx
	Name: Xxxxxxx X. Xxxxxxx
	Title: Attorney-in-fact
	XXXXXX X. XXXXXXX
	By:	/s/Xxxxxxx X. Xxxxxxx
	Name: Xxxxxxx X. Xxxxxxx
	Title: Attorney-in-fact

6