US Patent 10052104 Staple cartridge comprising a tissue thickness compensator

A staple cartridge is disclosed. The staple cartridge comprises a cartridge body comprising a deck and a bottom surface, and a plurality of staple cavities. Each staple cavity extends into the cartridge body from the deck to the bottom surface. The staple cartridge further comprises a plurality of wells. Each well comprises sidewalls and a lowermost surface. The sidewalls of each well extend into the cartridge body from the deck to the lowermost surface. The plurality of wells comprises a first well and a second well laterally offset with respect to the first well. The staple cartridge further comprises a plurality of staples removably positioned in the staple cavities and a tissue thickness compensator releasably secured to the cartridge body. The tissue thickness compensator comprises a compensator body and a plurality of extensions. The plurality of extensions comprises a first extension compressed between the sidewalls of the first well.