A. Indications 1. Glenoid labrum tears are common in throwing athletes. The tear is located at the anterior superior glenoid labrum and the attachment of the long head of the biceps tendon, and there is no shoulder joint instability; the glenoid labrum tear caused by Bankart damage causes shoulder joint instability. 2, rotator cuff tears Rotator cuff tears are more common and are located in the supraspinatus area, and are also common in athletes. 3.Biceps tendon lesions include tendon rupture, tendonitis, etc. 4.Humeral head Commonly for humeral head defect, namely Hillsachs damage. 5. Synovitis Including rheumatoid synovitis, etc., synovial villi are obviously hyperplastic. 6, osteoarthritis mainly for bone, cartilage parts degenerative changes. 7.Fracture dislocation Fracture within the shoulder joint, recurrent dislocation. Surgery 1.Tear glenoid lip resection 2.Rotator cuff reopening or repair The rotator cuff should be reopened and repaired with a cutting device. If the rotator cuff tear is full, the rotator cuff is reamed and reshaped after the reaming, and the rotator cuff is repaired with sutures under the microscope or small incision under direct vision. 3.Biceps tendon tear dilatation 4.Synovectomy The subacromial resection under shoulder arthroscopy is a more difficult operation, and it is easy to bleed for the operation. A small amount of paraprenaline can be added to the irrigation fluid to reduce bleeding in the operative field. 5.Shoulder crestoplasty is used to treat shoulder impingement syndrome. 6.Glenoid labrum fixation repair Recurrent shoulder dislocation is now mainly treated with anterior glenoid labrum expansion and revision, rivet fixation and suture repair method, with excellent efficacy. 7.Fracture repositioning and fixation Intra-articular shoulder fractures can be repositioned and fixed under microscopic view. 8.Other such as free body removal, etc.