In this report, we discuss nine patients with extension disturbance of the wrist, thumb, and fingers that were treated by the tendon transfer operation. There were five cases of brachial plexus injury and four cases of crush injury of the extensor tendons. The average age of the patients at operation was 23 years. The mean length of the postoperative follow-up was 4.1 years. The improvement of joint motion was acquired in 67% of the wrist cases, 86% of the thumb cases, and 75% of the finger cases. The results were poor in three cases, three in which two cases were brachial plexus injury and one was incomplete amputation of the wrist. The operation was unsuccessful due to evaluation failure of the mover in the two brachial plexus injury cases and adhesion of the transferred tendon in the incomplete amputation case.
