superficial head
1.The ulnar edge of the flexor pollicis brevis thickens to a tendinous arch at the origin from the deep transverse carpal ligament. 80% of the recurrent branch run across the arch . There is tendinous fascicle at the ulnar edge of the superficial head of flexor pollicis brevis 2mm far from the tendinous arch.
2.Combined injuries included ectopic ossification(27 cases),traumatic arthritis(19 cases),acetabular erosion(1 case),femoral head necrosis(3 cases),fat liquefaction(3 cases) and superficial infection(1 case).
