Reconstruction of the ulnar head with a vascularized second metatarsal head: case report.

A case of a young patient with avascular necrosis of the ulnar head following a severely displaced ulnar head fracture is presented. Treatment included debridement of the entire ulnar head, leaving the ulnar styloid, sigmoid notch, triangular fibrocartilage, and both distal radioulnar ligaments intact. The head of the ulna was reconstructed by transferring a vascularized second metatarsal head. At 4-year follow-up, the patient had a pain-free wrist with 45° active pronation and 65° supination. He resumed working without limitations as a manual laborer. We conclude that ulnar head reconstruction with a vascularized second metatarsal head is worthwhile in the setting of an unreconstructable traumatic defect, particularly when the sigmoid notch and distal radioulnar ligaments are preserved.