3D anatomical illustration showing inflammation in the AC joint (acromioclavicular joint) of the shoulder

AC Joint Separation Overview

AC joint separation, or acromioclavicular joint separation, occurs when the clavicle (collarbone) separates from the scapula (shoulder blade). This type of injury is common among athletes and often results from a fall directly onto the shoulder. Severity ranges from mild sprains to complete dislocations, with treatment options varying accordingly.

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American football players during a tackle, showing a direct shoulder impact — a common cause of AC joint separation

Causes & Risk Factors

AC joint separation typically occurs from a direct blow to the shoulder, especially during sports such as football, hockey, or cycling. Previous shoulder injuries and repetitive overhead activities may increase risk.

Diagnosis

A physical examination combined with X-rays (and sometimes MRI) helps diagnose the severity of the separation. The Rockwood classification system is commonly used.

Non-Surgical Treatment Options

Most Type I and II injuries are treated conservatively with

rest

 ice

sling

pain relievers

physical therapy

Surgical Treatment Options

 For more severe separations (Types III and above), surgery may be recommended. Options include

ligament reconstruction

fixation devices

minimally invasive arthroscopic surgery.

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Recovery & Outlook

Recovery time varies based on severity:
• Mild cases: a few weeks
• Surgical cases: several months, with rehabilitation being key to regaining strength and mobility.

Related Services

We also treat related conditions and offer:

Hand wrapped in gauze bandage after trigger finger release surgery during recovery

FAQ

If conservative treatments fail or if you have a severe separation (Type III or higher), surgery may be advised.

Yes, most mild to moderate cases heal well with non-surgical care.

Most patients regain excellent shoulder function, especially with proper rehab.

Need expert care for AC Joint Separation? Our team serves New Jersey residents across Old Bridge, Clifton, Sewell, Union, Paramus, Raritan, Wayne, Avenel, and Totowa

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