Analysis Of The Causes Of Patella Trajectory After Initial Total Knee Arthroplasty

Objective:The purpose of this study is to explore the causes of failure of primary total knee arthroplasty by studying the failure of patellar track after operation,so as to provide surgical guidance for avoiding patellar malalignment during total knee arthroplasty.Methods: The patients who accepted refurbishment in joint surgery the First Affiliated Hospital of Xinjiang Medical University since 2014 to Nov.2017,because of patellar maltracking after knee arthroplastywere followed up in 23 cases of 25 knees,retrospective analysis of causes of postoperative adverse patellar tracking.Results: In this study the causes of postoperative adverse patellar tracking are:(1)postoperative scar hyperplasia or patella wear;(2)the first TKA in the preoperative patellar position or patients with adverse anatomic variation;(3)improper placement or postoperative prosthesis wear;(4)prosthesis displacement;(5)intraoperative or postoperative soft tissue imbalance;(6)the osteotomy is improper or inappropriate choice.Conclusion: There are many factors causing poor patellar trajectory after primary knee replacement.In this study,the most unbalance of soft tissue is during or after the operation.A proper method can be used to reduce or even avoid the occurrence of poor patellar trajectory after the first TKA.