大菱形骨の骨折及び脱臼の治療経験

抄録

Three cases including a dorsal fracture-dislocation, a vertical fracture associated with fracture of the second metacarpal and an old complete volar dislocation are presented. The mechanism of these fractures is usually a direct blowon the wrist or a fall with the hyperextended hand in radial deviation. Our all cases were seen after violent, direct trauma.
Slightly displaced vertical fracture may respond well to closed reduction and casting. Although for the severe fracture-dislocation or complete dislocation, it is believed that anatomical reduction and internal fixation are indicated to provide the earliest possible restoration of motion of thumb with the least possibility of subsequent traumatic arthritis and avascular necrosis.