Trapezial ridge fractures.

Three patients with trapezial ridge fractures are reviewed. All three patients sustained a fracture of the palmar ridge of the trapezium from falls on the dorsiflexed wrist. They presented with symptoms of pain and tenderness over the base of the thenar eminence and thenar pain upon resisting wrist flexion. The fracture was demonstrated only when the carpal tunnel radiologic view of the wrist was obtained. A type I fracture at the base of the trapezial ridge healed with immobilization. Type II avulsion fractures of the tip of the ridge did not heal with immobilization.