It is a superficial joint formed between the collarbone (clavicle) and the shoulder blade (scapula).

Due to its contribution to shoulder mobility, the AC joint is considered significant. Dislocations of this joint usually occur as a result of falling onto the upper arm. Diagnosis is made through physical examination and X-ray imaging

AC joint dislocations are classified into six types.

Type I, Type II, and some Type III injuries are treated non-surgically. These patients can typically return to pre-injury activities within about six weeks.

For some Type III cases, as well as Type IV, V, and VI injuries, surgical treatment is recommended. Patients who undergo surgery may need up to six months to return to their previous level of activity.