Patent ID: 7740661

Claim:
An implant for engaging a radius bone and a humerus bone, the implant comprising: (a) a head portion comprising an upper surface for articular engagement with a capitulum of a humerus bone and a lower surface; (b) a stem portion for engagement with a radius bone and defining an axial opening; (c) a shaft having an upper shaft portion for engagement within an area of engagement in the lower surface of the head portion, the shaft having a lower, elongated shaft portion for slidable engagement with the stem portion by the elongated shaft portion fitting into the axial opening of the stem portion whereby the elongated shaft portion is axially movable within the axial opening of the stem portion; (d) a collar at a proximal end of the stem portion defining an opening with an axis at least generally perpendicular to an axis of the axial opening of the stem portion, the opening of the collar being configured to receive a screw for preventing the shaft from sliding within the axial opening of the stem portion; and (e) wherein the head portion comprises an outer shell and an inner insert, and wherein the area of the head portion for engagement with the upper shaft portion is a recessed area within the inner insert.