Joint surface replacement of the distal radioulnar joint

A surface replacement for a member of the distal radioulnar joint at the wrist of a patient which comprises either a radial component or an ulnar component, each of which is constructed to be placed radially on a cut lateral surface near the distal end of the respective radius or ulna without removing the entire distal articular surface of thereof, wherein the ulnar component has a front convex outer surface and an inner surface of a plurality of flat quadratic or rectangular walls angled to each other and wherein the radial component has a front concave surface which is intended to, after implantation, face toward the ulna and against the outer convex surface of the ulna or the replacement ulnar component during rotational movement of the distal radioulnar joint.

A method of repairing the distal radioulnar (DRU) joint by resecting the lateral surface at a location near the distal end of the radius and/or the ulna at the wrist of a patient and implanting a surface replacement including at least one of a radial component and an ulnar component, wherein the ulnar component has a front convex outer surface and en inner surface of a plurality of flat quadratic or rectangular walls led to each other and wherein the radial component has a front concave surface so that, after implantation, in the repaired DRU joint the radial component faces toward and bears radially against the outer convex surface of the ulna or the replacement ulnar component during rotational movement of the distal radioulnar joint and/or the replacement ulnar component bears radially against either the radius or the replacement radial component.

A surface replacement for the distal radioulnar joint of the wrist of a patient, which replacement comprises a radial component and an ulnar component, each of which is constructed to be placed radially on cut lateral regions near the distal of the radius and ulna, respectively, so that they articulate against each other, said ulnar component having an inner surface that comprises a plurality of juxtapositioned walls that are integrated in a reverse prismatic array.

A surface replacement for the distal radioulnar joint of the wrist of a patient, which replacement comprises a radial component and an ulnar component, each of which is constructed to be placed radially on cut lateral regions near the distal ends of the radius and ulna, respectively, so that they articulate against each other, said ulnar component being constructed to resurface the radial portion of the distal ulnar bead without disturbing the styloid process of the ulna or the attachment of the radioulnar ligaments.

A surface replacement for a member of the distal radioulnar joint at the wrist of a patient, which replacement comprises either a radial component or an ulnar component, each of which is constructed to be placed radially on a cut lateral region near the distal end of the respective radius or ulna without removing the entire distal articular surface thereof, wherein the ulnar component has a front convex outer surface and an inner surface of a plurality of flat quadratic or rectangular walls angled to each other and wherein the radial component has a front concave surface which, after implantation, faces toward ulna and bears radially against the outer convex surface of the ulna or the replacement ulnar component during rotational movement of the distal radioulnar joint, and wherein either the radial component or ulnar component can be used singularly or together to the tension of the radioulnar ligaments to increase by increasing the distance between the distal heads of the radius ulna as a result of intraoperative selection of an appropriate radial or ulnar component from groups of such components which include a plurality of varying sizes.

A method of repairing the distal radioulnar (DRU) joint by resecting the lateral surface at a location near the distal end of the radius end/or the ulna at the wrist of a patient and implanting a surface replacement including at least one of a radial component and an ulnar component, wherein the ulnar component has a front convex outer surface and an inner surface of a plurality of flat quadratic or rectangular walls angled to each other and wherein the radial component has a front concave surface so that, after implantation, in the repaired DRU joint the radial component faces toward and bears radially the outer convex surface of the ulna or the replacement ulnar component during rotational movement of the distal radioulnar joint and/or the replacement ulnar component bears radially against either die radius or the replacement radial component and wherein either the radial or the ulnar component, in a case of distal radioulnar ligaments disruption, is used to allow intraoperative selection of an appropriate radial and/or ulnar component size from a plurality of different available sizes to cause the tension of the secondary stabilizers, such as the interosseus membrane, to increase by increasing the distance between the distal heads of the radius and the nine.