Patent ID: 8679185
Filing Date: 2014-03-25
Classification: A61F

Abstract:
1. A prosthesis assembly, comprising: a stem configured to be implanted in bone, said stem including a receptacle extending from an open proximal end to a closed distal end, said receptacle having a tapered portion interposed between said open proximal end and said closed distal end, and said tapered portion being defined by a tapered wall structure; a head having a bearing surface configured to mate with at least one of a natural opposing joint component and a prosthetic opposing joint component, said head further having a coupling portion; and a mounting element including (i) a proximal portion positioned in mating relationship with said coupling portion of said head, and (ii) a solid frusto-spherical distal portion positioned in contact with said tapered wall structure; wherein said mounting element is mechanically locked in fixed relation to said stem by said solid frusto-spherical distal portion being positioned in friction fit engagement with said tapered wall structure and contacting said receptacle only along an inwardly tapered portion of said receptacle.