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Abstract Objective To Analyse the clinical effect of A-C tightrope fixation with assistance of arthroscopy in treatment of acromioclavicular joint dislocation.Methods From May 2012 to Sept 2013，there were 25 patients of acromioclavicular joint dislocation(Rockwood Ⅲ Ⅳ)treated with double titianium plate A-C tightrope fixation under arthroscopic vision，there were 13 males and 12 females，with an average age of (30.5±6.2)years(25 to 56 years )，during the surgey we could apply indirect or direct acromioclavicular joint dislocation reduction with arthroscopic inspection，and fix coracoid and distance clavicle with A-C tightrope ropes，Karlsson scores were applied to evaluate clinic effect in last follow-up.Results All the patient underwent the surgery successfully and there was no infection，no recurrent dislocation and inernal fixation loss.All the patients were followed up，the duration ranged from 12 to 18 months，with average of (15.3±3.8)months.The result of follow-up were excellent in 18 patients，good in 5 patients and poor in 2 patients with standard of Karlsson sores.The excellence and good rate was 92%.Conclusion There is some advantages of A-C tightrope fixation with assistance of arthroscopy in treatment of acromioclavicular joint dislocation，including less trauma，accurate manipulatation，satisficatory shoulder fuction recovery.
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