Patent ID: 7625408

Claim:
An implantable wrist prosthesis for implantation in a wrist, the wrist including a distal end of a radius presenting a substantially concave end surface contour and a carpus, the implantable wrist prosthesis comprising: a radius component comprising an articular cup and an intramedullary stem extending from the articular cup, the articular cup having an inner cup wall and further having an outer cup wall that is convexly curved such that the outer cup wall substantially conforms to the concave end surface contour at the distal end of the radius; a carpal plate having a bone interface surface, the carpal plate further having a spheroidal protrusion extending outwardly therefrom on a side opposite the bone interface surface; a carpal stem extending outwardly from the carpal plate on the bone interface surface, the carpal stem having a length proportioned so as to be capable of implantation into the carpus without the carpal stem intruding into a carpal-metacarpal joint; and a carpal ball articulated between the radius component and the carpal plate.