Shoulder Arthroplasty, from indications to complications
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The replaced shoulder is increasingly encountered by the radiologist, both on a dedicated and incidental basis, in this era of the growing population of ageing patients wishing to preserve their mobility and function. Knowledge of the normal biomechanics of the glenohumeral joint—particularly the function of the rotator cuff and the unique relationship of the humeral head to the glenoid—is essential for understanding the need for shoulder replacement and its subsequent complications, because the intent of shoulder arthroplasty is to approximate the normal joint as closely as possible. The most common indications for shoulder arthroplasty are osteoarthritis, inflammatory arthritis, proximal humerus fractures, irreparable rotator cuff tears, rotator cuff arthropathy, and avascular necrosis of the humeral head.

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