Patent ID: 7678150

Claim:
A total shoulder prosthesis comprising: a glenoid component including a metal convex articular surface, the glenoid component adapted for implantation proximate a glenoid cavity; a humeral component comprising a stem portion and a metaphyseal portion, the metaphyseal portion comprising a recess surrounded by a peripheral edge; a first insert comprising a first metal concave articular surface adapted to cooperate with the convex articular surface of the glenoid component, at least a portion of the first metal concave articular surface located within the recess when engaged with the metaphyseal portion, the metal concave articular surface on the first insert comprising a first configuration with respect to the metaphyseal portion; a second insert comprising a second metal concave articular surface adapted to cooperate with the convex articular surface of the glenoid component, at least a portion of the second metal concave articular surface located within the recess when engaged with the metaphyseal portion, the metal concave articular surface on the second insert comprising a second configuration with respect to the metaphyseal portion, wherein the first configuration is different from the second configuration; and a first feature on a peripheral edge of at least one of the inserts and a second feature provided on a top surface of the peripheral edge of the metaphyseal portion, the first and second features cooperating to immobilize the inserts from rotating relative to the metaphyseal portion.