Abstract: Objective：To analyze and compare the clinical efficacy of coracoclavicular ligament reconstruction technique and hook plate technique in the treatment of acute Rockwood Ⅴ acromioclavicular joint dislocation.Methods：Clinical date of 33 patients with acute Rockwood Ⅴ acromioclavicular joint dislocation who were admitted and followed up inour department from January 2016 to January 2019 were retrospectively analyzed. In 15 cases, LARS artificial ligament was used to reconstruct coracoclavicular ligament (reconstruction group), and in 18 cases, clavicular hook plate was used for open reduction and internal fixation (hook plate group). Xray films were reviewed at the 1st, 3rd, 6th and 12th months after the operation to assess whether there was reduction loss. VAS score and ConstantMurley score were used to assess the patients’ pain degree and shoulderfunction.Results：All the incisions in the two groups were grade a healed, and there were no early complications such as infection, nerve and vascular injury. In the hook plate group, the internal fixation was removed about 12 months after the operation.VAS score of injured shoulder in the ligament reconstruction group was lower than that in the hook plate group [(2.40±0.91)vs (3.61±1.58)],with statistically significant difference (P<0.05).The ConstantMurley function score of injured shoulder in the ligament reconstruction group was higher than that in the hook plate group [(68.07±8.84)vs(58.78±7.92)], with statistically significant difference (P<0.05). At 3,6 and 12 months after surgery, VAS score of injured shoulder the ligament reconstruction group was slightly lowerthan that in the hook plate group ,(1.93±0.80)vs(2.56±1.10), (0.87±0.74)vs(1.17±0.99), (0.53±0.64)vs(0.67±0.69), but the difference was not statistically significant (P>0.05). The ConstantMurley function score of injured shoulder in the ligament reconstruction group was slightly higher than that in the hook plate group, (68.07±8.84)vs(58.78±7.92), (80.93±6.35)vs(76.61±6.73), (90.80±3.10)vs(87.72±5.39),(93.13±2.80)vs(91.39±4.78), but the difference was not statistically significant (P>0.05).Conclusion：Both coracoclavicular ligament reconstruction technique and hook plate technique are satisfactory in the treatment of acute Rockwood Ⅴ acromioclavicular joint dislocation.However, the reconstruction of the coracoclavicular ligament has the advantages of quick recovery after operation and no need to remove the internal fixation again.

Key words: acromioclavicular joint dislocation, coracoclavicular ligament, artificial ligament, clavicle hook plate