[Method for reconstructing the circular metacarpophalangeal trochlea of the thumb].

The consequences of the division of the pulley of the flexor hallucis longus are described. This division may be necessary for the repair of tendon or in the treatment of trigger thumb. After division, the pulley cannot be sutured and the flexor tendon remains displaced anteriorly. The authors describe a technique of repair using a flap detached from the tendon of the adductor pollicis. 6 cases have been operated on with good results.