Patent ID: 7517364

Claim:
A prosthesis configured to be attached to a long bone, comprising: a first body having (i) a first exterior articulating surface configured to be generally hemispherically-shaped and defining a circular outer peripheral rim that includes a first outer periphery portion and a second outer periphery portion, and (ii) a concave first interior support surface opposed to the first exterior articulating surface, said concave first interior support surface defining a first cavity configured to receive a first portion of the long bone; and a second body having (i) a second exterior articulating surface extending from said first outer periphery portion of said circular outer peripheral rim of said first exterior articulating surface, and (ii) a second interior support surface opposed to the second exterior articulating surface, said second interior support surface defining a second cavity configured to receive a second portion of the long bone; and a stem having (i) a proximal end portion attached to said concave first interior support surface and defining a proximal outer stem periphery, wherein all of said proximal outer stem periphery is located within said first cavity, and (ii) a distal end portion defining a distal outer stem periphery, wherein all of said distal outer stem periphery is spaced apart from said first cavity, wherein no portion of said second exterior articulating surface extends from said second outer periphery portion of said circular outer peripheral rim of said first exterior articulating surface, wherein said first body defines a first body longitudinal centerline, wherein said stem defines a stem longitudinal centerline, wherein said first body longitudinal centerline and said stem longitudinal centerline are coincident, wherein said circular outer peripheral rim defines a first plane, wherein the second exterior articulating surface defines a peripheral edge; and wherein the peripheral edge defines a second plane, the first plane and the second plane being non-coincident.