AC Joint Injuries

The acromioclavicular (AC) joint is where the collarbone (clavicle) meets the top of the shoulder blade (acromion). This small but vital joint helps stabilize the shoulder and allows overhead and cross-body movement. Dislocation of the AC joint is a common shoulder injury, especially among athletes and active individuals. It typically occurs after a fall directly onto the shoulder or from a sharp blow during contact sports.

One of the most noticeable signs of an AC joint dislocation is a visible bump or lump on the top of the shoulder. This prominence results from the collarbone shifting upward after the supporting ligaments are injured.

Classification of AC Joint Injuries

AC joint injuries are classified using the Rockwood system, which ranges from Grade I to Grade VI.

Grades I & II

These are low-grade injuries, usually involving only a sprain of the capsule or minor stretching of the supporting ligaments. They often heal without surgery.

Grades III to VI

These represent more severe injuries where both the acromioclavicular and coracoclavicular ligaments are torn. In these cases, the collarbone displaces, creating the characteristic lump on the shoulder.

Grades IV to VI

These are considered high-grade injuries, and surgical reconstruction is generally recommended.

Grade III

Treatment depends on the patient’s lifestyle, activity level, and severity of symptoms. Surgery may be advised for athletes, manual workers, or those with persistent pain and instability.

Symptoms

Patients with AC joint dislocation commonly experience:

A prominent bump at the top of the shoulder
Pain, especially when lifting the arm or carrying objects
Swelling and tenderness over the joint
Limited shoulder strength and mobility
Discomfort lying on the affected side

Treatment

Non-Surgical Management

Low-grade AC joint injuries (Grade I–II) are typically managed with rest, a sling, ice, and physiotherapy. These measures aim to reduce pain and restore range of motion. Over time, most patients regain good function, though a small bump may remain.

Surgical Reconstruction

For higher-grade injuries (Grades IV–VI, and selected Grade III cases), surgical reconstruction is the preferred treatment. The goal is to restore the alignment of the joint and reattach the torn ligaments for lasting stability.

Dr. Rohit Sane specializes in Arthroscopy Assisted AC Joint Reconstruction, a minimally invasive approach that uses small incisions and advanced camera-guided techniques. This method reduces scarring, lowers the risk of complications, and allows for faster recovery compared to traditional open surgery.

As a dedicated shoulder surgeon, Dr. Rohit Sane provides personalised treatment plans for AC joint dislocations, whether the injury is new or longstanding. His expertise ensures accurate diagnosis, precise surgical techniques when needed, and comprehensive rehabilitation support to help patients safely return to sport, work, and everyday activities.

Take the First Step Toward Recovery

An AC joint dislocation doesn’t have to hold you back from the activities you love. With expert care and modern arthroscopic techniques, pain relief and restored function are within reach.

Book a consultation with Dr. Rohit Sane today to discuss your injury and take the next step toward a strong, stable shoulder.

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