AC Joint Osteoarthritis

Cartilage is the protective tissue that covers the ends of bones in a joint, allowing for smooth and pain-free movement. In AC osteoarthritis, the cartilage of the clavicle and acromion gradually breaks down and wears away, leading to pain, swelling, and difficulty in cross-body movement.

The primary cause of AC joint osteoarthritis is the gradual breakdown of cartilage in the joint due to aging, wear and tear, and repetitive use of the shoulder. Previous injuries, such as dislocations or fractures, can also contribute to the development of osteoarthritis in the AC joint.

Usually, the main symptom is pain over the AC joint, especially when lifting the arm or reaching across the body. Tenderness over the AC joint, swelling, and a clicking or grinding sensation during movement is also common. As the condition progresses, individuals may experience a decrease in shoulder strength and range of motion.

A comprehensive physical examination of the shoulder performed by Dr. Chahla and his team, along with a detailed history and a series of x-rays will lead to a confirmed AC joint diagnosis. An x-ray can help assess not only for AC joint osteoarthritis, but also rule out any additional injuries to the bone, such as an AC joint dislocation or fracture of the end of the collarbone. In addition to x-ray, an MRI scan may be ordered to determine the degree of osteoarthritis of the AC joint. The MRI also allows Dr. Chahla to fully assess surrounding shoulder structures, including the proximal biceps tendon, superior labrum, and rotator cuff.