Rupture of digital extensor tendons following distal ulnar resection.

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We have treated four patients with rupture of one or more digital extensor tendons following a distal ulnar resection for a traumatic problem. The rupture was caused by the abrasive effect of the distal part of the ulna at the site of resection during pronation and supination. Two patients were treated with a silicone-rubber prosthesis ad tendon grafts and two, with resection of an ulnar bone spike and local tendon transfers. Tendon rupture is best avoided by strict adherence to the surgical technique described by Darrach. If rupture of the tendon occurs, reconstructive procedures must be devised to repair the individual lesion found at operation.

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