Arthroplasty of the ulnar carpometacarpal joints.

Fracture-dislocation of the ulnar carpometacarpal (CMC) joints may result in malunion or arthropathy when it is missed or inadequately treated. Partial resection arthroplasty of the ulnar CMC joints was done in 16 patients to treat malunion subsequent to dorsal fracture-dislocation. This procedure is recommended as a reliable means of treatment that preserves the important motion on the ulnar side of the hand.