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  • Title: Arthroscopic Coracoclavicular Ligament Reconstruction for Acromioclavicular Joint Dislocation.
    Author: Hashiguchi H, Iwashita S, Abe K, Sonoki K, Yoneda M, Takai S.
    Journal: J Nippon Med Sch; 2018; 85(3):166-171. PubMed ID: 30135343.
    Abstract:
    BACKGROUND: The purpose of this study was to evaluate mid- and long-term clinical and radiologic outcomes of arthroscopic coracoclavicular ligament reconstruction (ACCLR) with an artificial ligament for acute dislocation of the acromioclavicular joint (ACJ). METHODS: Twelve male patients (average age at the time of surgery: 40.8 years, range: 21-64 years) underwent ACCLR with an artificial ligament for acute dislocation of the ACJ type III or type V according to the Rockwood classification. Arthroscopic surgery was performed with the patient under general anesthesia and interscalene brachial plexus block in the beach-chair position. Reduction of the ACJ was performed manually or using an elevator under control of an imaging intensifier. The ACJ was fixed temporarily with a Kirschner wire. Bone tunnels of the coracoid process and clavicle were made with a cannulated drill. An artificial ligament was pulled out through the bone tunnels and fixed on the upper surface of the clavicle with a staple and interference screw, and on the undersurface of the coracoid process with an Endobutton. The shoulder was immobilized with a shoulder brace for 4 weeks postoperatively, and rehabilitation was started in the first postoperative week. The Japan Shoulder Society Acromioclavicular Joint Function Assessment (JSS-ACJ) score was used for evaluation of clinical outcomes, and plain radiographs were performed after a minimum follow-up period of 5 years postoperatively. RESULTS: The average follow-up period after surgery was 106.3 months (range: 62-128 months). The average postoperative JSS-ACJ score was 97.2 points (range: 92-100). The seven patients who had been playing sports before injury all returned to their pre-injury level. No patients complained of pain or shoulder dysfunction in daily activities, work, or sports. There were no complications such as neurovascular injuries during surgery, infection, or foreign body reaction from the artificial ligament. Radiographs at the final follow-up showed subluxation of the ACJ and non-symptomatic osteoarthritic changes of the ACJ in two patients, respectively. CONCLUSION: ACCLR for acute dislocation of the ACJ is a useful surgical procedure that gives satisfactory clinical and radiologic outcomes on mid- and long-term follow-up. ACCLR can stabilize vertical instability of the ACJ. If instability in the horizontal direction remains, repair or reconstruction of the acromioclavicular ligament should be added to prevent osteoarthritic changes of the ACJ.
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