#$%^&*AU2014200584B220151001.pdf#####INTERLOCKING BUTTRESS MATERIAL RETENTION SYSTEM Abstract A surgical stapler (10) comprising a first jaw having a staple cartridge (22) and a second jaw including an anvil (20), at least one of the first jaw and the second jaw defining a tissue contacting surface defining a tissue contacting plane and a recessed portion formed into the tissue contacting surface, the at least one of the first jaw and the second jaw including at least one projection； and a staple line buttress material (24, 26) disposed in the recessed portion of the at least one of the first jaw and the second jaw and engaging the at least one projection.
