The Relationship Between Shoulder Impingement Syndrome and Coracoacromial Ligament Degeneration a Predictive Factor for Shoulder Acromioplasty.

Objective:The coracoacromial ligament (CAL) connects the acromion and coracoid process of the scapula. This study aimed to explore the correlation between CAL degeneration and shoulder pathology, specifically focusing on the efficacy of acromioplasty in treating shoulder impingement in patients with varying degrees of CAL degeneration. Methods:49 patients diagnosed with bursal-side partial rotator cuff tear were assessed for CAL degeneration and categorized into three grades. They were then randomized into acromioplasty and non-acromioplasty groups to compare the outcomes. Acromiohumeral distance (AHD) and fatty infiltration was evaluated on imaging examinations. American Shoulder and Elbow Score (ASES) and Visual Analogue Scale (VAS) was recorded to evaluate the shoulder function before and two years after surgery. Results:Grade III CAL patients demonstrated significantly reduced AHD and increased VAS scores compared to Grades I and II. Post-acromioplasty, Grade III patients showed a statistically significant improvement in ASES scores compared to the non-acromioplasty group. Conclusion:The study indicates that CAL degeneration is a significant indicator of shoulder impingement. Notably, acromioplasty significantly improves shoulder function in patients with severe CAL degeneration, suggesting its potential as a targeted treatment in managing shoulder impingement.