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- W1579615273 abstract "There is an increasing demand for total knee replacements (TKR). Young patients areplacing increasing functional demands on modern TKR. Clinical experience has alsoshown the need for high flexion in patients after TKR. In this study, assessment of TKRperformance subjected to deep knee bend was investigated.Patellar resurfacing in TKR is assumed to release pain and restore knee function.Despite the recent advance and success in TKR operation, patellar resurfacing has beenassociated with an increase in complications at the patello-femoral joint, and hencerevisions following TKR. Complications include poor tracking, instability, wear, looseningand fractures. These complications have been attributed in part to the component designfeatures (e.g. sagittal radius, depth, and orientation of the trochlear groove of the femurand the geometry of the patellar component surface) and surgical technique (e.g.component alignment and ligament balance). However, the influence of these factors onthe overall performance of TKR has not been investigated extensively.The objective of the study was to determine the variation of patellar kinematics (trackingmotion) and contact mechanics (contact force, area, pressure and stress) induced bycomponent design and surgical technique. A three-dimensional finite element (FE)model of a PFC-Sigma TKR, including the tibio-femoral and patello-femoral joints wasdeveloped. Explicit FE analysis was used to simulate TKR under a deep knee flexion.The models predicted substantial increase in patellar pressure and stress with nonconformingpatello-femoral articulating surfaces. Femoral groove orientation affectedpatellar tracking and contact mechanics. Extending femoral groove distally reducedpatello-femoral contact stress at high flexion angles. Also, externally rotating the femoralcomponent and adjusting the line of action of quadriceps pull would be beneficial byreducing patellar lateral force. The FE model used in the current study provided insightinto the effect of component design parameters and surgical technique on patellofemoralkinematics and contact mechanics." @default.
- W1579615273 created "2016-06-24" @default.
- W1579615273 creator A5058246274 @default.
- W1579615273 date "2007-06-01" @default.
- W1579615273 modified "2023-09-23" @default.
- W1579615273 title "Effect of total knee replacement design and surgical techniqueon patello-femoral joint performance: an explicit finite element study" @default.
- W1579615273 hasPublicationYear "2007" @default.
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