Total wrist joint prosthesis

Abstract

A total wrist prosthesis of the type which is permanently included by surgery between the hand and the forearm with osteotomy of the carpus, comprising a stem having a section and length adequate for its nailing in the radial bone, a substantially rectangular plane base from one face of which said stem projects, a support arranged on the opposite face of said base displaced from the axial axis of said stem, a rotula articulated in said support, a second stem projecting in the opposite direction from said first stem connected with said rotula and nailable in the third metacarpal bone and in the capitate bone. In one variation a thin cylindrical stem projects from the neck of the second stem bent at an angle at a distance from said second stem to provide a substantially parallel sector to said second stem allowing rotational movement. In a second variation a pair of planar triangular transverse projections are arranged in the neck of the second stem symmetrically with respect to its axis, the projections having a side perpendicular to said axis and being nailable in the third metacarpal and in the body of the capitate bone.

Dependencies are inferred from the claim text.