A surgical stapling apparatus including a releasable buttress material, the surgical stapling apparatus comprising a cartridge assembly including a plurality of staples and a tissue contacting surface defining staple retaining slots, the cartridge assembly including a swaged outer edge an anvil assembly including a tissue contacting surface defining staple pockets for forming staples expelled from the staple retaining slots of the cartridge assembly and a buttress material including an outer portion retained within the swaged outer edge of the cartridge assembly.
