Patent ID: 8870962

Claim:
A glenosphere for a reverse shoulder prosthesis comprising: a glenosphere body having an articular surface configured to interface with a humeral liner, an anterior side configured to interface with a glenoid bone, a posterior side configured to interface with the glenoid bone, a superior side configured to interface with the glenoid bone, and an inferior side configured to interface with the glenoid bone, wherein the articular surface is generally spherical where the articular surface interfaces with the humeral liner, wherein the anterior side and the posterior side are each chamfered, wherein the chamfered anterior side and the chamfered posterior side results in a non-spherical face to interface with the glenoid bone, wherein the non-spherical face has an anterior-posterior axis length that is smaller than a superior-inferior axis length, and wherein the chamfered anterior side and the chamfered posterior side are designed so that the non-spherical face of the glenosphere that interfaces with the glenoid bone: i) resembles that of the glenoid bone and ii) allows the glenosphere to sit flush on a resected surface of the glenoid bone when the glenosphere is disposed adjacent a glenoid plate and the glenoid plate is affixed to the glenoid bone.