To discuss the clinical efficacy of the double Endobutton plates technique under the arthroscope to treat the acromioclavicular joint dislocation of Rockwood type Ⅲ or above.

From March 2016 to March 2019, a total of 23 patients with acute acromioclavicular dislocation underwent double Endobutton plates reconstruction of coracoclavicular ligament by arthroscope. Postoperative follow-up was conducted on a regular basis. Visual analogue score of pain (VAS) was used to evaluate shoulder joint pain, the Constant score was used to evaluate shoulder joint function, and the Karlsson score was used to evaluate shoulder joint efficacy. The measurement data within the group were compared by one-way repeated measurement analysis of variance and paired t test.

Twenty-three patients were followed up for an average of(13±3)months. No brachial plexus or peripheral vascular injury was found in the patients, and X-ray examination showed anatomic reduction of the acromioclavicular joint in all the patients. The VAS scores were (7.5±0.9), (2.1±0.8), (1.6±0.7) (F=196.25, P<0.001) before operation, and in postoperative six months and 12 months respectively; there were statistically significant differences between the preoperative data and the data of postoperative six and 12 months (all P<0.001). There was no statistically significant difference between the postoperative data of six months and 12 months (t=1.550, P>0.05). The patients′ constant scores were(44.5±3.8), (81.4±3.1), (93.9±2.0)(F=735.25, P< 0.001) before operation, and in the postoperative six months and 12 months respectively; the differences were statistically significant (all P<0.001). At the last follow-up, the Karlsson scores were excellent in 21 cases (91.3%) and good in two cases (8.6%).

Arthroscopy assisted double Endobutton plates reconstruction coracoclavicular ligament for Rockwood Ⅲ type above the acromioclavicular joint dislocation has good clinical curative effect, can effectively improve the shoulder joint pain, shoulder joint function recovery.