#$%^&*AU2014200109A120140821.pdf#####CIRCULAR STAPLING DEVICE INCLUDING BUTTRESS MATERIAL ABSTRACT An anvil assembly (200) includes a circular anvil head (210) that supports a crush ring (240), an anvil cap (220) that supports an o-ring (215), and a circular anvil buttress member (230). The cap (220) connects to the head (210) and is movable relative to the head (210) between approximated and unapproximated positions. The crush ring (240) is spaced from the cap (220) when the cap (220) is in the approximated position and movable into engagement with the cap (220) to move the cap (220) to the unapproximated position. The buttress member (230) includes a body portion (232) and an extension portion (234). The body portion (232) is supported on the head (210) and the extension portion (234) is secureable between the o-ring (215) and the head (210) when the cap (220) is in the approximated position. The extension portion (234) is releasable from between the o-ring (215) and the head (210) when the cap (220) is disposed in the unapproximated position so that the body portion (232) separates from the head (210).1/5 CN CI CJN CJ cnv cv,, C=J
