Patent ID: 7766969

Claim:
An implant for mounting on a resected articulation surface of a bone, the implant comprising: a tray having a top surface and an opposing bone apposition surface with a perimeter edge extending therebetween, an opening extending completely through the tray between the top surface and the bone apposition surface, and a first passageway extending from the perimeter edge to the opening; a bearing member mounted on the top surface of the tray, the bearing member having a top articular surface; an anchor projecting away from the bone apposition surface of the tray, the anchor comprising: a keel having a top surface and a bottom surface, an opening extending through the keel between the top surface and bottom surface, and a keel passageway extending transversely through the keel; and an elongated stem releasably attached to the keel, the elongated stem being adapted to engage the bone, and the anchor being configured so that the entire anchor can pass completely through the opening of the tray; and a fastener sized to pass into the first passageway and into the keel passageway when the keel is disposed in the opening of the tray, so that the fastener removably secures the tray to the anchor.