The topic Acromioclavicular Joint Separation you are seeking is a synonym, or alternative name, or is closely related to the medical condition Shoulder Separation.

Quick Summary:

• A Shoulder Separation is a very painful and traumatic injury that involves the acromioclavicular joint (AC joint). It occurs, when the ligaments that support the AC joint, are stretched or torn. Hence, it is also known as Acromioclavicular Joint Separation
• A Shoulder Separation is usually caused by a high-energy impact that results from an athletic sport or motor vehicle accident. However, a fall onto the shoulder may also result in this type of shoulder injury
• A high percentage of Shoulder Separations do not require surgery. With early treatment and proper management of the condition, complications, such as osteoarthritis, may also be avoided
• The prognosis is generally good with early intervention and proper treatment of the shoulder condition 

Shoulder Separations are graded on the basis of how far the collarbone has separated from the shoulder:

• Type I: Acromioclavicular (AC) joint ligaments are injured without any tearing, or no distinct separation occurs
• Type II: A minor separation of the acromioclavicular joint is present
• Type III: This occurs, when the acromioclavicular ligament and surrounding coracoclavicular ligaments are completely torn
• Type IV, V, and VI: Rare Shoulder Separation injuries that usually involve a complete dislocation or fracture of the collarbone 

Please find comprehensive information on Shoulder Separation regarding definition, distribution, risk factors, causes, signs & symptoms, diagnosis, complications, treatment, prevention, prognosis, and additional useful information HERE.