Type of ac joint shoulder seperation

What is a shoulder separation?

A shoulder separation is not truly an injury to the shoulder joint. The injury actually involves the acromioclavicular joint (also called the AC joint). The AC joint is where the collarbone (clavicle) meets the highest point of the shoulder blade (acromion).

Type of ac injuries

  • Grade 1: A mild shoulder separation involves a sprain of your AC ligament that does not move your clavicle and looks normal on X-rays.

  • Grade 2: A more serious injury tears the AC ligament and sprains or slightly tears the CC ligament, putting your clavicle out of alignment to some extent.

  • Grade 3: The most severe shoulder separation completely tears both your AC and CC ligaments and puts your shoulder joint noticeably out of position.

  • Grades 4, 5 and 6 AC separations are rare.

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