Abstract
The purpose of this study was to report our results of arthroscopic resection of the distal clavicle (arthroscopic Mumford procedure) for the acromioclavicular joint pain after a subluxation or the osteoarthritis. We evaluated 6shoulders of 6 patients. All patients were male and the average age at the surgery was 39.2 years (24-66 years), the average duration of the preoperative symptom was 8.3 months (3-17 months), and the average follow-up period was 38.5 months (25-57 months).5 cases were doing sport before a symptom appeared (baseball in 2 cases, ice hockey, judo and golf in 1 case respectively). The preoperative diagnoses were internal derangement after a type I or type II acromioclavicular joint injury in 4 cases, and were osteoarthritis in 2 cases. All cases had a positive lidocaine test for the acromioclavicular joint. At the time of the operation, about 1 cm of the distal clavic le was removed bursoscopically with the superior acromioclavicular ligament left intact. There were significant improvement of the JOA score, the JSS sports score, and the JSS AC joint score postoperatively. All 5 cases doing sport returned to the same level as before surgery. The arthroscopic Mumford procedure has the advantage of a low morbidity. To keep the stability of the acromioclavicular joint, the acromioclavicular ligament must be left intact. The amount of bone removal will be limited within about 1 cm, and it is necessary and sufficient.
