The acromioclavicular joint, also called the AC joint, is located at the top of the shoulder where the clavicle (collarbone) and highest part of the scapula (shoulder blade) meet.
Any joints in the body have a higher risk of developing complications from normal wear and tear. Degeneration causes wear out of the cartilage which cushions the joint. This kind of arthritis is known as osteoarthritis.
In the shoulder, the acromioclavicular (AC) joint is a popular location for developing osteoarthritis in the middle age. AC joint degeneration can be painful and can cause trouble using the shoulder for everyday activities.
- Joint trauma. Serious injury or surgery can cause damage to the acromioclavicular (AC) joint and eventually lead to acromioclavicular osteoarthritis
- Joint stress
- Chronic injury. …
- Congenital defect or illness. …
- Advanced age
- Family history