ACJ Injury

shoulder-jointA separated shoulder (which can also be known as acromioclavicular separation, AC joint separation or AC separation), is a relatively common injury to the acromioclavicular joint. This however, should not be confused with shoulder dislocation which occurs when the humerus separates from the scapula at the glenohumeral joint.

The Acromioclavicular joint is located at the distal end of the clavicle and attaches to the acromion of the scapula. Although this is part of the shoulder, a dislocation and a separation are completely different. Acromioclavicular separation occurs as a result of a downward force being applied to the superior aspect of the acromion, either by something striking the top of the acromion or by falling directly onto it. The injury is more likely to occur if the shoulder is struck with the arm outstretched. The resultant trauma to the shoulder has a direct effect on the ligaments holding the two bones (scapula and the clavicle) together. This injury does not always involve bone fractures; however if the impact to the shoulder is severe, fractures may occur.

Separated shoulders often occur in people who participate in sports. This shoulder separation is classified into 6 types, with 1 through 3 increasing in severity, and 4 through 6 being the most severe. The most common mechanism of injury is a fall on the tip of the shoulder or a fall on an outstretched arm.

A complete separation occurs when both the Acromioclavicular and Coracoclavicular ligaments rupture.

Diagnosis is based on physical examination and an x-ray of the affected shoulder, with treatment of the separated shoulder dependant on the severity of the injury. Should it be determined that surgery is required, your doctor will discuss the best course of intervention available and establish your suitability for surgery.

After surgery and in the hands of experienced users of Lockdown ACJ, typical mobilization and rehabilitation may be as follows:

  • Broad arm sling for 2 weeks
  • Patients allowed to drive a motor vehicle at week 4 and return to work (light duties)
  • Light sports activity at 8 weeks
  • Full contact sports at 12 weeks

Please discuss a specific rehabilitation plan with you Doctor and Physiotherapist.

This information is not intended to form a diagnosis of a medical condition or suggest any appropriate treatment. The procedure Lockdown Surgical presents is an option and is not the only device or solution for ACJ separation. Always refer to your doctor for any diagnosis or treatment information.