Buttress for circular eea staplers

An apparatus for joining two hollow organ sections with an annular array of surgical staples comprising:

• a staple cartridge assembly configured to support the annular array of surgical staples therein, the staple cartridge assembly including pushers configured to eject the respective surgical staples from the staple cartridge assembly, and an outer wall defining a cavity and having a finger deflectably extending over the cavity;
• an anvil assembly movable relative to the staple cartridge assembly between spaced apart and approximated positions to adjustably clamp the two hollow organ sections between the staple cartridge and anvil assemblies;
• and
• a buttress material including an annular body dimensioned to be mounted on a distal surface of the staple cartridge assembly, and a tab extending proximally from the annular body such that at least a portion of the tab is wrapped around the finger of the outer wall of the staple cartridge assembly, wherein the pushers are movable between a first position in which one of the pushers engages the finger such that the tab of the buttress material wrapped around the finger is secured against the pusher, and a second position in which the one of the pushers is disengaged from the finger such that the at least a portion of the tab of the buttress material wrapped around the finger is released from the one of the pushers.