nexgen後十字貯蔵総膝関節形成術を有する被験者の後部大腿骨ロールバックのin vivo測定

この研究では、非対称形状を有する後膝孔総関節形成術を移植した被験者の深膝曲げ活動中のin vivo運動学を決定します。20人の被験者のうち、19人の外側顆の大腿骨後部ロールバック（PFR）を経験し（平均-3.9 mm）、13人の被験者が内側顆のPFRを経験しました（平均-3.1 mm）。外側顆が内側顆よりもさらに後部転がっている結果、平均して、被験者は1.4度の正常軸回転を経験しました。Of 20 subjects, 10 experienced normal axial rotation, whereas 10 experienced an opposite rotation pattern.Condylar lift-off occurred predominantly with the lateral condyle.以前のin vivo研究とは反対に、この研究の被験者は、後十字貯蔵総膝関節形成術の一貫したPFRを経験しました。It can be hypothesized that having asymmetric femoral condyles may lead to PFR with increasing knee flexion.

This study determines the in vivo kinematics during a deep-knee bend activity for subjects implanted with a posterior cruciate-retaining total knee arthroplasty having asymmetric geometries. Of 20 subjects, 19 experienced posterior femoral rollback (PFR) of the lateral condyle (average -3.9 mm), and 13 subjects experienced PFR of the medial condyle (average -3.1 mm). As a result of the lateral condyle rolling further posterior than the medial condyle, on average, subjects experienced 1.4 degrees of normal axial rotation. Of 20 subjects, 10 experienced normal axial rotation, whereas 10 experienced an opposite rotation pattern. Condylar lift-off occurred predominantly with the lateral condyle. Contrary to previous in vivo studies, the subjects in this study experienced consistent PFR of the posterior cruciate-retaining total knee arthroplasty. It can be hypothesized that having asymmetric femoral condyles may lead to PFR with increasing knee flexion.