Patent ID: 8062376

Claim:
An implant assembly for a shoulder joint having a humerus and a glenoid, the assembly comprising: a first head bounded by a first convex surface and a first base, the first base including a first coupling mechanism having a first diameter configured to mate the head to the glenoid; a second head bounded by a second convex surface and a second base, the second base having a second coupling mechanism having a second diameter; a humeral stem configured to be inserted in the humerus; a cup attachable to the stem and having a concave surface configured to articulate with the convex surface of the head, and a second adaptor disposed between the humeral stem and the cup; and a glenoid fixation component having a coupling surface configured to be mated with a prepared glenoid coupling surface, and an outward facing surface, defined on the outward facing surface is a boss portion defining an exterior locking taper and an interior locking taper, said glenoid fixation component defines a plurality of bone fixation holes, wherein one of the first head and the second head are selectively couplable to the glenoid fixation component, said first coupling mechanism is configured to be coupled to the exterior locking taper in a first configuration, said second coupling mechanism is configured to be coupled to the interior locking taper in a second configuration, and wherein the first head is configured to not engage the interior locking taper when in the first configuration.