Apr 5, 2026 · An acromioclavicular joint injury, otherwise known as a shoulder separation, is a traumatic injury to the acromioclavicular (AC) joint with disruption of the acromioclavicular ligaments and/or …

A shoulder separation occurs when a fall or other trauma tears or stretches the ligaments of your acromioclavicular joint, which is the point where your collarbone meets your shoulder blade. A …

A shoulder separation is not an injury to the shoulder's main ball-and-socket joint. The injury actually involves the acromioclavicular joint (also called the AC joint). The AC joint is where the clavicle …

Acromioclavicular (AC) joint injuries are characterized by damage to the acromioclavicular joint and surrounding structures. Almost invariably traumatic in etiology, they range in severity from a mild …

Mar 27, 2023 · Read on to learn more about AC joint separation, including symptoms, how it’s managed, and treatment options.

This review provides an update on the anatomy and biomechanics of the AC joint, clinical, and surgical management of AC joint injuries, and a description of outcomes and complications following the …

A Type II AC separation involves complete tearing of the acromioclavicular ligament, as well as a partial tear (but not a full tear) of the coracoclavicular ligaments. [5]

Aug 21, 2025 · An acromioclavicular (AC) joint separation is when the collarbone and shoulder blade separate at the top of the shoulder. It often happens after a fall or hit to the shoulder and can cause …

Feb 7, 2026 · Unlike a shoulder dislocation (which involves the ball-and-socket joint), an AC separation involves the ligaments connecting the collarbone (clavicle) to the shoulder blade (acromion), …

Feb 21, 2024 · This article describes updated treatment strategies for AC separation, including type III AC separation which is known most controversial. Finally, we present a proposed treatment …