Acromioclavicular (AC) Joint Injuries Subluxation Dislocation Instability

The Acromioclavicular (AC) Joint is the small joint on top of the shoulder where the clavicle attaches. If the AC joint is hit head-on, such as when falling off a bike or tackling somebody without shoulder pads, the clavicle may detach, raise up and become noticeably 'out of joint'. A

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Acromioclavicular (AC) Joint Arthritis

Arthritis of the AC joint leads to pain at the top of the shoulder. This happens more frequently in laborers and weight-lifters, but is very common in the general population as well. The diagnosis of AC joint arthritis is best made on physical examination. This is because arthritic changes of

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