Arthroscopic repair of posterior bony Bankart lesion addresses glenoid, capsulolabral pathology

摘要

Posterior instability is less common than anterior shoulder instability, encompassing approximately 10% of all shoulder instability in young active patients. The etiology of posterior instability is most commonly traumatic dislocation or subluxation that damages the posterior labrum, posterior inferior glenohumeral ligament, and/or the bony glenoid rim (posterior bony Bankart lesion). Traumatic posterior shoulder instability or dislocation is typically seen when a posteriorly directed force is applied to a flexed adducted and internally rotated limb, which forces the humeral head posteriorly. Atraumatic chronic posterior instability is found notably in patients who frequently perform activities with repetitive posterior-directed forces, such as weight lifters or football linemen.