Abstract:Objective: To investigate the effect of double bundle reconstruction of coracoclavicular ligament with Rigidloop suspended titanium plate in the treatment of Rockwood Ⅲ acromioclavicular joint dislocation. Methods: A retrospective study was conducted on 48 patients with Rockwood III acromioclavicular joint dislocation who received surgical treatment in our hospital from June 2019 to June 2020. According to the results of preoperative communication between doctors and patients, they were divided into hook plate group (22 cases) and reconstruction group (26 cases). The perioperative, follow-up and imaging indexes of the two groups were recorded and compared. Results: The operation time of the two groups was similar, and the difference was not statistically significant (P>0.05), but the total length of incision and intraoperative blood loss in the reconstruction group were smaller than those in the hook plate group (P<0.05), and the hospital stay in the reconstruction group was shorter than that in the hook plate group (P<0.05). The VAS score, CRP and IL-6 levels in the reconstruction group were lower than those in the hook plate group (P<0.05) on the 1st to 3rd day after operation. All patients were followed up for an average of (22.2 ± 2.5) months. The recovery time of complete weight-bearing activity in the two groups was similar, and the difference was not statistically significant (P>0.05). Compared with preoperative, UCLA shoulder function score and shoulder ROM of patients in both groups were higher at 3 months and the last follow-up (P<0.05). At 3 months and the last follow-up, the UCLA shoulder function score and shoulder ROM in the reconstruction group were higher than those in the hook plate group (P<0.05). Compared with pre-operation, CC and AC of patients in both groups decreased at 3 months after operation and at the last follow-up (P<0.05). There was no significant difference in CC and AC between the two groups at 3 months and the last follow-up (P>0.05). Conclusion: Compared with the treatment of Rockwood III acromioclavicular joint dislocation with hook plate, the reconstruction group has the advantages of less trauma, rapid recovery, slight postoperative pain, and low postoperative inflammation level. It can also effectively improve the function and range of motion of the patients' shoulder joint, and improve the reduction effect of the acromioclavicular joint.