Variable Prosthesis

摘要

The present teachings are directed to a shoulder prosthesis having an adjustable radial offset and/or angular inclination provided by relative rotation of an adapter interdisposed between a stem and a head. In one example, a prosthesis has a stem having a first longitudinal axis. The prosthesis can also include an adaptor including a first taper. The first taper can have a first taper axis. The prosthesis can include a head supported by the adaptor. The head can be selectively oriented and then coupled to the first taper and the combination can be selectively orientated and the coupled to the stem.

主权项

1. A femoral prosthesis system, comprising:
a femoral head having an articulating surface, a head female taper formed into the femoral head, wherein a head center axis of the femoral head is offset a first radial distance from a head taper center axis of the head female taper; an adapter having a first side, an opposed second side, an outer surface defining an adapter male taper, an adapter female taper formed into the adapter through the first side, and a stem facing taper surface, wherein an adapter center axis of the adapter is offset a second radial distance from an adapter female taper axis; and a femoral stem having a body and a neck, wherein the neck has an outer surface that defines a neck male taper, wherein the femoral head, the adapter, and the neck are selectively connected to form a selected femoral head offset relative to the femoral stem, and wherein the stem facing taper surface of the adapter is configured to provide clearance between the adapter and the femoral stem.