Early clinical effect of patellar replacement on anterior knee pain in patients with knee osteoarthritis after total knee arthroplasty

ZHU Wei-min; TANG Ben-sen; ZHANG Tao; ZHOU Guang-fu; TIAN Xiao-bin

Abstract：Objective To discuss the clinical efficacy and postoperative pain of patellar replacement in pa-tients with osteoarthritis in total knee arthroplasty.Methods A total of 93 cases with total knee arthroplasty in our hospital from May 2011 to Jul.2013 were randomly selected and divided into replacement group( n=43) and non-replacement group( n=50) by the stochastic indicator method.The differences of related indicators at different time points between the two groups were compared.Results The differences of KSS knee score and Feller score be-tween the preoperative replacement group and non-replacement group were not significant(P>0.05);3,6 and 12 months after the surgery,the KSS knee score and Feller score of the replacement group were significantly higher than that of the non-replacement group(P<0.05);the differences of knee VAS score between the preoperative replace-ment group and non-replacement group were not significant(P>0.05);3,6 and 12 months after the surgery,the knee VAS score of the replacement group were significantly lower than that of the non-replacement group ( P <0.05 );differences of the tibiofemoral angle,patellar ligament ratio,and ROM values between the two groups were not significant before and after the surgery;12 months after the surgery,significant improvement of the tibiofemoral an-gle,patellar ligament ratio and ROM values in both groups were observed compared to those before the operation (P<0.05).Conclusion Patellar replacement in the total knee arthroplasty showed a significant effect in impro-ving knee function score,patellar score and postoperative pain score.