![]() ![]() During the exam, the physician will be looking for: This is the joint that connects the collarbone and the scapula (Figure 1).ĭiagnosis of shoulder arthritis begins with a history and physical exam. The other smaller joint in the shoulder that does not provide much motion is the acromioclavicular (A-C) joint. A soft tissue bumper called the labrum deepens the socket. The glenoid part of the scapula is the socket side. This is where the humerus (arm bone) meets the scapula (shoulder blade). The main joint that provides most of the shoulder motion is a ball-and-socket joint called the glenohumeral (G-H) joint. There are two joints within the shoulder that can be affected by osteoarthritis. Irregular motion, bone spurs, and inflammation can result in pain and loss of motion in the shoulder. These are bony growths which form as the bone tries to heal itself. This leads to irregular motion as the bones scrape against each other and cause bony spurs called osteophytes. This causes the rough bones to rub against each other. In osteoarthritis, the smooth cartilage that covers the ends of the bones gets worn away. Less common types of shoulder arthritis are rheumatoid arthritis (inflammatory) and traumatic arthritis. This is also known as degenerative joint disease. Osteoarthritis is the most common type of shoulder arthritis. ![]()
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