ULNAR STYLOID MALUNION WITH DISLOCATION OF THE DISTAL RADIOULNAR JOINT

Four patients with dorsal dislocation of the distal radioulnar joint a nd ulnar styloid malunion had corrective osteotomy of the ulnar styloi d, Dislocation of the distal radioulnar joint was reduced in three of four patients, Subluxation persisted in the remaining patient. Wrist f unction improved in all patients. These results support the contention that a displaced ulnar styloid fracture with distal radioulnar joint dislocation should be reduced and internally fixed. Corrective osteoto my is recommended for malunion of the ulnar styloid associated with di slocation of the distal radioulnar joint.