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As reverse shoulder replacement has become more popular, the indications have expanded to include shoulder “pseudoparalysis” due to massive rotator cuff tears, shoulder fractures, severe bone loss on the scapula or humerus precluding the use of standard implants and failed prior shoulder replacement procedures. [6]
Reverse total shoulder arthroplasties are typically indicated when the rotator cuff muscles are severely damaged. [14] There are a few major approaches for reverse total shoulder arthroplasties. The first is the deltopectoral approach, which is the approach described above for the traditional total shoulder arthroplasty.
Arthritis of the shoulder can be treated with total shoulder replacement, hemiarthroplasty (half a replacement), or a reverse shoulder implant (for arthritis with large rotator cuff tear). Arthritis or osteolysis of the acromioclavicular joint
People diagnosed with glenohumeral arthritis and rotator cuff anthropathy have the alternative of total shoulder arthroplasty, if the cuff is largely intact or repairable. If the cuff is incompetent, a reverse shoulder arthroplasty is available and, although not as robust a prosthesis, does not require an intact cuff to maintain a stable joint.
Rotator cuff (with 11. Supraspinatus, 12. Subscapularis, 13. Infraspinatus, 14. Teres minor), 15. Biceps muscle. The rotator cuff is a group of muscles and their tendons that act to stabilize the human shoulder and allow for its extensive range of motion. Of the seven scapulohumeral muscles, four make up the rotator cuff. The four muscles are:
The rotator cuff muscles of the shoulder produce a high tensile force, and help to pull the head of the humerus into the glenoid cavity. The glenoid cavity is shallow and contains the glenoid labrum which deepens it and aids stability. With 120 degrees of unassisted flexion, the shoulder joint is the most mobile joint in the body.