Abstract: Objective To explore the outcomes of double Endobutton plate and suture-anchor for beak lock ligament reconstruction in the treatment of Tossy Ⅲ dislocation of acromioclavicular joint. Methods From February 2009 to August 2010, 30 patients with Tossy Ⅲ dislocation of acromioclavicular joint were treated with only Double Endobutton （group A）, while 28 patients with Tossy Ⅲdislocation of acromioclavicular joint were treated with double Endobutton plate and suture-anchor from March 2011 to May 2012 （group B）. The postoperative effect of the shoulder were evaluated and compared between the two groups according to the Karlsson scoring system. Results In group A, the vertical distance from shoulder peak to clavicle side of 3 cases was more than 10 mm, the acromioclavicular joint gap width of 3 cases was more than 10 mm, while no case was observed in group B （P〈0.05）. There was no significant difference in strength and shoulder joint activity between the two groups （P〉0.05）. But the number of cases in pain of group A were more than group B （P〈0.05）. Conclusion Double Endobutton plate and suture-anchor for the treatment of Tossy III dislocation of acromioclavicular joint can lead to more stable outcomes and relieve postoperative pain symptoms.

Key words: Acromioclavicular joint, Beak lock ligament, Dislocation, Reconstruction