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A prospective study of closed reduction percutaneous pin fixation and early early passive range of motion exercise of the acute acromioclavicular jonit separation was done in Srinakarind hospital, Khon Kaen, Thailand during July 1991 to December 1992 , 14 male patients were included, average age was 33.79 years, 6 were left side and 8 were right side, traffic accidents were the major cause of injury, only one was by sport injury and the other one was by sport injury and the other one was hit by an elephant, 11 cases were type III dislocation and 3 cases were type IV, average preoperative coracoclavicular gap was 1.74 centimeters. Average time of pin removal was 58 days postoperatively, 3 cases (21.42%) of the patient had free motion of the shoulder at 2 weeks postoperatively and 13 cases (92.88%) had pain free motion at 4 weeks, 12 cases (85.71%) had normal range of motion of the shoulder at 8 weeks. 4 cases (28.57%) had retrograde pin migration and one had pin tract infection.
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