Posterior Distal Clavicle Beveling for Chronic Nonincarcerated Type IV Acromioclavicular Separations: Surgical Technique and Early Clinical Outcomes.

ABSTRACT

PURPOSE: To describe the arthroscopic partial posterior distal clavicle beveling technique for treatment of chronic nonincarcerated type IV acromioclavicular (AC) separations and report clinical outcomes and return to sport. METHODS: All patients who underwent the arthroscopic partial distal clavicle beveling technique and met eligibility criteria were identified and retrospectively reviewed. Inclusion criteria included the clinical diagnosis of a chronic nonincarcerated type IV AC separation and a minimum follow-up period of 24 months. Subjects completed the American Shoulder Elbow Surgeons shoulder assessment and a study-designed questionnaire. Radiographic images and clinical charts were also reviewed. RESULTS: This study identified 15 consecutive patients with 2 lost to follow-up, resulting in inclusion of 13 subjects (9 males and 4 females). Dominant arm was involved in 77% of cases. Mean age at operation was 33.2 years (range, 19-56 years). The mean period between injury and operation was 12.5 months (range, 3-37 months), and follow-up was 48.5 months (range, 24-126 months). The mean preoperative ASES score was 46.6 ± 16.9 (range, 33-68), and the mean postoperative ASES score was 87.3 ± 17.4 (range, 50-100) (P < .0001). All 9 athletes in the study returned to competition with a mean recovery period of 2.3 months (range, 2 weeks to 4 months). Mean timeframe for return to work was 2 weeks (range, 1 day to 2 months). One subject underwent a subsequent coracoclavicular ligament reconstruction for continued pain. The mean satisfaction level was 4.3 out of 5, and 91% would choose to have the surgery again. One subject indicated dissatisfaction with shoulder appearance. CONCLUSIONS: The arthroscopic partial distal clavicle beveling procedure for nonincarcerated type IV AC separations resulted in a significant reduction in pain, improved daily function, and early return to sport. LEVEL OF EVIDENCE Level IV, therapeutic case series.