Résumé
Chronic ulnar extensor tendon dislocation at the metacarpophalangeal joint causes permanent extension deficit and ulnar drift. Several soft tissue procedures have been described for realignment of the extensor tendon in post-traumatic reducible instability or in combination with joint replacement in case of altered metacarpophalangeal joint in inflammatory conditions. However, no studies reported correction of both extension lag and ulnar deviation following isolated surgical treatment of ulnar extensor tendon dislocation at the metacarpophalangeal joint. The present study evaluated the clinical and functional results of isolated correction of chronic non-traumatic ulnar extensor tendon dislocation at metacarpophalangeal level using the modified Dell technique.