Clinical observation of patellar trajectory after total knee arthroplasty for knee osteoarthritis complicated with femoral trochlear dysplasia
Objective To observe the clinical effect of total knee arthroplasty and patellar trace recovery in patients with knee osteoarthritis combined with femoral trochlear dysplasia.Methods A retrospective analysis was performed on 60 cases of knee osteoarthritis with femoral trochlear dysplasia treated by total knee arthroplasty from January 2019 to May 2020.Clinical knee HSS score,knee motion,pain VAS score,femoral trochlear groove angle,depth of trochlear groove,patellar inclination angle,femoral inclination angle and patellofemoral fitting angle before and after Dejour surgery were compared.Results All the 60 cases were followed up for 18 to 26 months(mean 24.5 months).At the last follow-up,femoral trochlear groove angle,femoral trochlear groove depth,patellar inclination angle,lateral femoral inclination angle and patellofemoral fit angle were improved in all patients,with statistical significance(P＜0.05).At the last follow-up,there were no significant differences in femoral trochle-ar angle,femoral trochlear depth,patellar inclination angle,lateral femoral inclination angle and patellofemoral fit angle among different Dejour types(P＞0.05).At the last follow-up,the clinical HSS score,pain VAS score and knee motion of all patients were significantly improved compared with those before surgery,with statistical significance(P＜0.05).At the last follow-up,there was no significant difference in clinical HSS score,pain VAS score and knee motion among patients with different Dejour types(P＞0.05).Conclusion Total knee arthroplasty can significantly improve patellar trajectory abnormalities caused by femo-ral trochlear dysplasia,thereby improving patellofemoral joint stability and knee function.
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