Does a positioning rod or a patient-specific guide result in more natural femoral flexion in the concept of kinematically aligned total knee arthroplasty?
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- 作者：Max Ettinger ; Tilman Calliess…
- 关键词：Knee arthroplasty ; Internal and external rotation ; Malrotation of components ; Kinematic alignment ; Oxford knee and WOMAC scores ; Function
- 刊名：Archives of Orthopaedic and Trauma Surgery
- 出版年：2017
- 出版时间：January 2017
- 年：2017
- 卷：137
- 期：1
- 页码：105-110
- 全文大小：
- 刊物类别：Medicine
- 刊物主题：Orthopedics;
- 出版者：Springer Berlin Heidelberg
- ISSN：1434-3916
- 卷排序：137
文摘
PurposeFlexion of the femoral component in 5° increments downsizes the femoral component, decreases the proximal reach and surface area of the trochlea, delays the engagement of the patella during flexion, and is associated with a higher risk of patellar-femoral instability after kinematically aligned TKA. The present study evaluated flexion of the femoral component after use of two kinematic alignment instrumentation systems. We determined whether a distal cutting block attached to a positioning rod inserted perpendicular to the distal femoral joint line in the axial plane and 8–10 cm into the distal femur anterior and posterior to the distal cortex of the femur in the sagittal plane or a femoral patient-specific cutting guide sets the femoral component in more natural flexion.