Shoulder arthroplasty system

Abstract

An implant system for total shoulder arthroplasties, hemi shoulder arthroplasties, and “reverse” total shoulder arthroplasties including a humeral stem having an enlarged head portion with interfaces adapted to removably receive various modular interchangeable components, such as articulating liners, spacers, and adapter inserts. The humeral stem functions as a universal platform that may be used in either conventional or “reverse” total shoulder arthroplasties, as well as hemi shoulder arthroplasties, and may remain implanted in place during a revision in which the implant system is converted between the foregoing configurations, for example.

What is claimed is: 
     
         1 . A humeral implant component for use in a total shoulder arthroplasty or a hemi shoulder arthroplasty, comprising:
 a stem portion extending toward a distal end thereof;   a head portion at a proximal end thereof, said head portion including an internal cavity having first engagement structure and a first tapered bore; and   a second component received within said internal cavity and including a first stem received within said first tapered bore.