AC Arthritis - Acromioclavicular ArthrosisAC arthritis is a common condition of degeneration of the acromioclavicular (AC) joint. The AC joint is between the clavicle (collarbone) and acromion ...Osteoarthritis of the Acromioclavicular Joint - OrthogateThis type of arthritis is called osteoarthritis. Doctors sometimes refer to this type of arthritis as arthrosis. The acromioclavicular (AC) joint in the shoulder is a ...AC (Acromioclavicular) Joint Arthritis - Sports Injuries, Sports ...The acromioclavicular joint, or AC joint, is the joint formed between the collarbone (clavicle) and the top of the shoulder blade (acromion). Most people have a ...