A, Extended Wagner incision. Thenar incision between glabrous and nonglabrous skin, extended ulnarly across wrist crease to radial side of flexor carpi radialis tendon. B, Thenar musculature. Note: protect all crossing sensory branches before exposing abductor pollicis brevis and flexor pollicis brevis muscle fascia. C, Reflection of thenar muscles from abductor pollicis longus insertion. The volar capsule is sharply elevated away from trapeziometacarpal joint, leaving intact ligamentous attachments to metacarpal beak. D, Malunited Bennett fracture. E, After fixation of fracture malunion.