Arthroscopic Mumford Procedure for AC Joint Arthritis

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Background: Acromioclavicular (AC) joint arthritis is a common cause of shoulder pain in young patients. Management has been focused on relieving pain mainly with conservative nonsurgical procedures such as corticoid injections, physical therapy and even, recently, orthobiological interventions with platelet-rich plasma and hyaluronic acid injections. However, failed conservative management opens the door to surgical interventions such as the arthroscopic distal third of the clavicle resection. Indications: Patients submitted to this surgery must have a confirmed diagnosis of an arthritic, painful AC joint that has not been properly responding to nonoperative management. Technique Description: The surgical procedure is done in the beach chair position with standard arthroscopic portals. After a proper intraarticular evaluation of the structures and ruling out any other causes of pain, the surgeon passes to the subacromial space. Identification of the AC joint is made by following the coracoacromial ligament medial and with manipulation of the clavicle from the patient's skin. Debridement should start by releasing the anterior and posterior ligaments to allow for proper visualization of the articulation. A bur or a 5.5-mm shaver is used to start resection of the distal third of the clavicle under visualization and with care to not create a vault. The procedure is considered done when a smooth articular surface is visualized and with at least 5 mm of space between the clavicle and the acromion. Results: The proposed technique, which is a variant of the classic distal clavicle excision, has shown improved functional outcomes with reproducible postoperative scores and low complications rates in the setting of patients with isolated AC joint arthritis. Conclusion: Surgical management of the painful, arthritic AC joint has been evolving alongside with the history of shoulder arthroscopy; the proposed arthroscopic approach is an easy and effective way of freeing the patient of pain and discomfort with quick return to activities and sports. Patient Consent Disclosure Statement: The author(s) attests that consent has been obtained from any patient(s) appearing in this publication. If the individual may be identifiable, the author(s) has included a statement of release or other written form of approval from the patient(s) with this submission for publication.