Abstract: An end effector for a surgical stapling apparatus includes a cartridge assembly and an anvil assembly. The cartridge assembly supports staples. Each staple includes a backspan, a first leg, and a second leg. The first and second legs extend from the backspan. The anvil assembly is coupled to the cartridge assembly. The anvil assembly includes an anvil having opposed side surfaces. The anvil defines a knife slot and biased staple-forming pockets disposed between the opposed side surfaces of the anvil. Each biased staple-forming pocket is positioned to form the first and second legs of a respective staple on one side of the backspan of the respective staple. The one side of the backspan is positioned toward the knife slot of the anvil relative to the opposed side surfaces of the anvil.

Abstract: A loading unit for use with a surgical instrument includes a body configured for coupling to a surgical instrument and defining a longitudinal axis and having proximal and distal ends, and an end effector coupled to the distal end of the body. The end effector includes a staple cartridge assembly having a staple cartridge and an anvil assembly having an anvil plate. A drive assembly is at least partially disposed within the body. The drive assembly includes an actuator member having a roller engageable with at least one of the staple cartridge assembly or the anvil assembly. The roller is configured to rotate upon longitudinal movement of the drive assembly to facilitate movement of the drive assembly and relative movement of the staple cartridge assembly and the anvil assembly between open and approximated conditions.