What is shoulder arthritis?
Although the shoulder is comprised of four joints, the main joint is the glenohumeral joint . The glenohumeral joint describes the articulation of the humeral head (ball) and glenoid (socket). The ends of these bones are lined with protective connective tissue (cartilage), which allow the joint to move smoothly. The other joints of the shoulder include the acromioclavicular (AC) joint, the the sternoclavicular joint (SC) and the scapulothoracic joint. The SC joint is where the clavicle (collarbone) and sternum meet, and the AC joint is where the clavicle and scapula (shoulder blade) meet on top of the shoulder. When cartilage is damaged, arthritis results, which leads to bone-on-bone rubbing. This painful friction can limit mobility, range of motion, and cause pain. Shoulder arthritis can occur in any of these joints; glenohumeral joint arthritis is a serious clinical issue. If the arthritis causes extensive damage, total shoulder replacement, or total shoulder arthroplasty, may be recommended. Dr. Riley J. Williams, orthopedic shoulder specialist serving Manhattan, Brooklyn, New York City, NY and surrounding areas has extensive experience in treating shoulder arthritis and shoulder related injuries.