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Treatment (How is this injury treated?) Clavicle fracture. Direct blow. Pain. ... _____ and refer to a physician. Check for _____. Acromioclavicular (AC) joint sprain. 3rd degree sprain, clavicle moves superiorly. Piano key sign. 1st/2nd degree sprains. 3rd degree sprains. Sternoclavicular (SC) joint sprain. Direct blow to clavicle. Athlete ... ................
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