Corrective osteotomy for intra-articular malunion of the sigmoid notch of the distal part of the radius: a case report.

Joint incongruity at radiocarpal joint is a common complication of the distal radius fracture, and has received much attention and study. However, the problem and outcome of treatment of intra-articular incongruity at the sigmoid notch after distal radius fracture is rarely reported. We describe a patient with deformity of the distal radioulnar joint, and impairment of supination after distal radius fracture. The evaluation of the distal radioulnar joint revealed the absence of degenerative arthritis and malunion of the sigmoid notch of the distal radius with a prominent volar lip limiting supination. We present a method of corrective osteotomy for the malunited sigmoid notch of the distal radius, to correct the incongruity of the distal radioulnar joint and restore supination.