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Abstract Objective To compare and analyze efficacy and safety of the locking plate and hook plate internal fixation for Neer Ⅱ type efficacy and safety clavicle fracture. Methods 70 patients with neer Ⅱ distal clavicle fracture were randomly divided into two groups,with 35 cases in each group.The hook plate group were treated with hook plate internal fixation,while the locking plate group were treated with locking plate internal fixation.The operation time,intraoperative blood loss and incision length were compared between the two groups.Visual analogue scale (VAS) in 3 months and 6 months after surgery,Constant-Murley score of shoulder joint function,and UCLA score were compared between the two groups.Fracture healing time,coracoid space separation ratio in 6 months after surgery were compared between the two groups,and the incidence of adverse reactions were compared between the two groups.Results The operations were successfully completed in both groups.There was no significant difference in operation time and blood loss between groups (P>0.05),The incision length of the hook plate group was longer than that of the locking plate group (P<0.01),and the difference was statistically significant.The shoulder VAS score of the hook plate group was higher than that of the locking plate group,while the scores of Constant-Murley and UCLA were lower than those of the locking plate group (P<0.01).There were no significant differences in fracture healing time and coracoid space separation ratio in 6 months after surgery between the two groups (P>0.05).The incidence of adverse reactions of the hook plate group was higher than that of the locking plate group,and the difference was statistically significant(P<0.05).Conclusion Locking plate and hook plate internal fixation can be applied to Neer type Ⅱ distal clavicle fracturest,the locking plate has smaller incision,and the postoperative shoulder joint pain and functional scores were better in the short term,it can be used as the optimal scheme for Neer Ⅱ type distal clavicle fracture.
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