Shoulder implant assembly

Abstract

An implant assembly and associated method for selectively performing reverse and traditional arthroplasty for a shoulder joint that includes a humerus and a glenoid. The implant assembly may include a head, a cup, a humeral stem and an adaptor. The method includes inserting the humeral stem to the humerus and connecting a male taper of the adaptor to a female taper of the head. For reverse arthroplasty, the method includes attaching the adaptor to the glenoid and the cup to the stem. For traditional arthroplasty, the method includes attaching the adaptor to the humeral stem and the cup to the glenoid. The method also includes articulating the head with the cup.

What is claimed is: 
     
         1 . An assembly of implant components for a shoulder joint having a humerus and a glenoid, the assembly comprising:
 a head having a convex surface;   a cup configured to articulate with the convex surface of the head;   a humeral stem; and   a glenoid adaptor configured to connect the head to the glenoid when the cup is connected to the humeral stem, and the glenoid adaptor further configured to connect the cup to the glenoid when the head is connected to the humerus, said glenoid adaptor having a coupling peg defining a through bore, said through bore defining a coupling taper and a central screw bearing surface.