A comparative study of functional recovery and biomechanics between open reduction loop plate and clavicular hook plate in treatment of acromioclavicular dislocation
Objective To investigate the therapeutic effect of open reduction loop plate and clavicular hook plate in patients with acromioclavicular joint dislocation.Methods A total of 72 patients with acromiocla-vicular dislocation admitted to the hospital from January 2020 to January 2023 were divided into loop plate group(34 cases)and clavicular hook group(38 cases)according to surgical methods.The operation time,intraoperative blood loss,incision length,hospital stay and complications of the 2 groups were compared.The shoulder joint motion,Constant-Murley score,ASES score and CC-Dist values of the 2 groups were compared before and after the operation.The relative force arm 12 months after surgery and the coracocla-vicular space and acromioclavicular space 1,6 and 12 months after surgery were recorded.Calculated the amount of reset lost.Results Compared with clavicular hook group,the operation time of loop plate group was prolonged,the amount of bleeding was reduced and the incision length was shortened.Com-pared with the group before the surgery,the shoulder abduction,external rotation and internal rotation of the 2 groups were increased 6 and 12 months after the surgery;and the shoulder abduction,external rota-tion and internal rotation of the loop plate group were higher than that of the clavicular hook group 6 and 12 months after the surgery.Compared with the group before the surgery,the Constant-Murley and ASES scores of the 2 groups were increased 1,6 and 12 months after surgery;compared with the clavicular hook group 1,6 and 12 months after the surgery,the Constant-Murley and ASES scores of the loop plate group were higher.Compared with the group before the surgery,the CC-Dist value of the 2 groups were de-creased at 1,6 and 12 months after the surgery,and the CC-Dist value of the loop plate group was lower than that of the clavicular hook group at 6 and 12 months after the surgery,and the relative lever of the loop plate group was higher than that of the clavicular hook group.Compared with clavicular hook group,the loss of coracoclavicular and acromioclavicular space reduction in loop plate group was decreased,and the differences were statistically significant(P<0.05).There were no complications in loop plate group and 2.63%(1/38)in clavicular hook group,with no statistical significance between groups(P>0.05).Conclusion Loop plate fixation in the treatment of acromioclavicular dislocation has the advantages of small incision,less intraoperative bleeding,less postoperative pain,better early functional recovery of shoulder joint,better biomechanical effect,and fewer complications.