First metacarpal lengthening following traumatic amputation of the thumb: long-term follow-up

Thumb amputation is a relatively frequent injury in industrial accidents, producing a significant effect on hand function. The long-term results of 18 first metacarpal elongations in patients who had had a non-replantable thumb amputation at the metacarpophalangeal level are reported. Lengthening was performed using a unilateral external fixator. After a learning curve with a high complication rate and prolonged treatment, good functional results were obtained after some technical modifications, with eight patients returning to their previous occupation, and the rest requiring a change in their job.