TENDON GRAFT RECONSTRUCTION FOR GRADES IV AND V ACROMIOCLAVICULAR DISLOCATION. SHORT-TERM RESULTS: M. DEZILLIE, N. POULIART, F. HANDELBERG

Abstract

We report the short-term results of an alternative treatment for acromioclavicular (AC) dislocation.

36 patients, aged 20 to 58 (mean 36), with Tossy types IV (16) or V (20) AC-injuries were operated on within 1 week after trauma. The majority of patients had sport-related injuries. All patients were engaged in overhead activities, either professionally or for sports. The surgical technique consisted of a double fixation. A processed tendon-graft, either fascia lata or tibialis anterior, was looped around the coracoid process and the distal clavicle in a figure-of-eight and sutured onto itself after reduction of the dislocation. The AC discus was removed if damaged. No attempt at repair of the ligaments was made. The graft was protected for 6 weeks with 2 percutaneously placed acromioclavicular K-wires. In this period pendulum exercises and up to 45° abduction were allowed.

21 patients had an excellent result with painfree function, including full range of motion and strength, at only 3 month postop; another 5 needed 6 months to reach an excellent result. These patients could fully return to their work or sports activities at 3 months postop. 5 developed frozen shoulder syndrome and had a poor result at 3 month postop. These patients recovered well and all had good or excellent results at 8 month postop. 3 patients refused follow up after removal of their K-wires and 2 refused follow up beyond 3 months, at which time their result was good (1/5) or fair (4/5).

Although a good to perfect reduction was obtained perop, X-rays showed perfectly maintained reduction in only 12 shoulders. 15 patients had minimal loss of reduction (< 5mm), 7 had < 100% ascension of the clavicle and 2 had > 100% ascension.

Complications were rare, with 3 patients having early pin migration or removal due to infection which led to loss of reduction. 3 other patients had minor AC wound problems and another 2 pintract infection; all without further consequences.

The use of a processed tendon-graft to reconstruct the coracoclavicular ligaments, protected by 6 weeks of K-wires, appears to be a valuable treatment option for Tossy grades IV and V AC injuries. This technique allows rapid recuperation of full function as well as return to work and sports in the majority of patients.