Patent ID: 7819923

Claim:
A shoulder prosthesis comprising: a stem having a rod portion and a proximal face; a humeral head having a head axis and a bottom surface opposite said articulation surface, said bottom surface being generally perpendicular to the head axis, said bottom surface defining a female taper having a female taper axis, said head axis being angularly inclined with respect to the female taper axis; and an adaptor interposed between said proximal face of said stem and said bottom surface of said humeral head, said adaptor being relatively and continuously rotationally positionable on said stem to provide a first adjustment and relatively positionable on said head to provide a second adjustment so as to couple said head to said stem in a fixed orientation within a range of orientations defined by said first and second adjustments, said adaptor having a first coupling taper having a first taper axis and a second coupling taper having a second taper axis, said first and second taper axis intersecting at a point within the adaptor, said adaptor allowing continuous selective rotational coupling engagement of the adaptor about the first axis.