Patent ID: 8100981

Claim:
A tibial implant device useful in knee replacement surgery, the device comprising: a body having a concave proximal articulating region, a distal fixation region substantially opposing the proximal region and structured to interface with a resurfaced region of a tibia bone, and a peripheral sidewall between the proximal region and the distal region and including a curved sidewall portion and a substantially straight sidewall portion; a support region formed on said distal region, said support region including a plurality of distally extending projections which form a plurality of open channels for the passage of a flowable bone cement; and at least one port including an inlet, an outlet and a closed passageway there between in the device, the at least one port extending through an angled surface region, which angled surface region extends outwardly and distally from the proximal region, the at least one port being oriented so that the closed passageway slopes distally from the inlet to the outlet at an angle with respect to the support region, the at least one port being structured and positioned to allow flowable bone cement to be passed from outside the device through the closed passageway into the distal region after the device is placed in contact with a tibia bone; wherein the distal region further includes a distally extending sidewall at least partially circumscribing the support region, said distally extending sidewall including a flow control structure effective in controlling the flow of bone cement from the distal region; the flow control structure formed at least in part on the outer surface of the distally extending sidewall and including a plurality of spaced apart, open ended notches in the distally extending sidewall; wherein the device is single unitary structure, and is free of a through hole for inserting a bone screw through the device into a tibial bone.