Objective To analyze the efficacy of posterior medial mini-incision combined with arthroscopic double SMC knot fixation using high-strength suture in the treatment of posterior cruciate ligament(PCL)avulsion fractures.Methods Sixty patients with PCL avulsion fractures were select-ed as the study subjects,and randomly divided into anchor fixation group(treated with anchor fixa-tion,n=30)and high-strength suture fixation group(treated with double SMC knot fixation using high-strength suture,n=30).Follow-up data were recorded for both groups.The fracture healing time,operative time,as well as changes in knee function assessed by the Lysholm score,Internation-al Knee Documentation Committee(IKDC)score and knee range of motion before and after treatment were compared between the two groups.Results The follow-up period for all 60 patients ranged from 6.5 to 22.5 months,with a mean time of(13.50±7.49)months.No patients were lost during fol-low-up.Four patients in each group showed a weakly positive drawer test,but no restrictions in knee extension were observed.There were no statistically significant differences in postoperative Lysholm scores,IKDC scores and knee range of motion between the two groups(P＞0.05).The fracture healing time and operative time in the high-strength suture fixation group were(11.27±0.87)weeks and(53.73±4.67)minutes,respectively,which were significantly shorter than(12.35±1.03)weeks and(64.06±5.13)minutes in the anchor fixation group(P＜0.05).Conclusion Both posterior medial mini-incision combined with arthroscopic double SMC knot fixation using high-strength suture or anchor fixation are effective in treating PCL avulsion fractures.However,the high-strength suture double SMC knot fixation method exhibits shorter operative time and fracture healing time,as well as lower operative difficulty.

Objective To analyze the efficacy of posterior medial mini-incision combined with arthroscopic double SMC knot fixation using high-strength suture in the treatment of posterior cruciate ligament(PCL)avulsion fractures.Methods Sixty patients with PCL avulsion fractures were select-ed as the study subjects,and randomly divided into anchor fixation group(treated with anchor fixa-tion,n=30)and high-strength suture fixation group(treated with double SMC knot fixation using high-strength suture,n=30).Follow-up data were recorded for both groups.The fracture healing time,operative time,as well as changes in knee function assessed by the Lysholm score,Internation-al Knee Documentation Committee(IKDC)score and knee range of motion before and after treatment were compared between the two groups.Results The follow-up period for all 60 patients ranged from 6.5 to 22.5 months,with a mean time of(13.50±7.49)months.No patients were lost during fol-low-up.Four patients in each group showed a weakly positive drawer test,but no restrictions in knee extension were observed.There were no statistically significant differences in postoperative Lysholm scores,IKDC scores and knee range of motion between the two groups(P＞0.05).The fracture healing time and operative time in the high-strength suture fixation group were(11.27±0.87)weeks and(53.73±4.67)minutes,respectively,which were significantly shorter than(12.35±1.03)weeks and(64.06±5.13)minutes in the anchor fixation group(P＜0.05).Conclusion Both posterior medial mini-incision combined with arthroscopic double SMC knot fixation using high-strength suture or anchor fixation are effective in treating PCL avulsion fractures.However,the high-strength suture double SMC knot fixation method exhibits shorter operative time and fracture healing time,as well as lower operative difficulty.