Bankart Repair surgically treats torn ligament tissue in the lower, front part of the shoulder. Shoulder dislocation often causes a Bankart lesion, or tearing of the inferior glenohumeral ligament part of the labrum. The labrum is a ring of fibrous cartilage that lines the bone socket of the shoulder, known as the glenoid. The labrum deepens the socket and adds stability to the shoulder. A Bankart lesion significantly weakens the shoulder.