US Patent 7476253 Humeral head preserving implant

A modular humeral implant and associated kit and method for implantation into a humerus that includes a natural humeral shaft and a natural humeral head. The modular implant includes a humeral stem for implantation into the natural humeral shaft, and an adapter. The adapter includes an anchoring projection and is operable for coupling to the humeral stem. The anchoring projection is adapted for insertion into an underside of the natural humeral head.