Modular shoulder prosthesis

A shoulder prosthesis comprising:

• a humeral stem having a proximal end and a distal end, said proximal end having a post extending therefrom, said post having tapered threads extending essentially from said proximal end of said humeral stem to an end of said post;
• a humeral head having an articulation surface and a bottom surface, and a mounting cavity in said bottom surface;
• and
• an expansion member configured to be received in said mounting cavity and having a threaded bore adapted to be received on said threaded post, said expansion member allowing humeral head angulation and fixing of a selected humeral head position when said expansion member is advanced onto said threaded bore such that expansion member expands.

A shoulder prosthesis comprising:

• a humeral stem having a proximal end and a distal end, said proximal end having an expansion cavity therein;
• a humeral head having an articulation surface and a bottom surface, and a mounting cavity in said bottom surface;
• and
• an expansion device configured to be received in said expansion cavity, said expansion device having an expansion member with a threaded bore and a mounting expander, said mounting expander having a head adapted to receive said mounting cavity of said humeral head and a threaded body adapted to receive said expansion member, said expansion device allowing humeral head angulation and fixing of a selected humeral head position when said mounting expander is advanced onto said threaded bore such that expansion member expands.