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Flexed femoral component improves kinematics and biomechanical effect in posterior stabilized total knee arthroplasty

Authors
 Kyoung-Tak Kang  ;  Yong-Gon Koh  ;  Juhyun Son  ;  Oh-Ryong Kwon  ;  Kwan Kyu Park 
Citation
 KNEE SURGERY SPORTS TRAUMATOLOGY ARTHROSCOPY, Vol.27(4) : 1174-1181, 2019 
Journal Title
 KNEE SURGERY SPORTS TRAUMATOLOGY ARTHROSCOPY 
ISSN
 0942-2056 
Issue Date
2019
MeSH
Activities of Daily Living ; Adult ; Arthroplasty, Replacement, Knee/instrumentation* ; Arthroplasty, Replacement, Knee/methods* ; Biomechanical Phenomena ; Computer Simulation ; Femur/pathology ; Femur/surgery ; Humans ; Knee/surgery ; Knee Joint/surgery* ; Knee Prosthesis* ; Male ; Models, Anatomic ; Patellofemoral Joint/surgery ; Patient Satisfaction ; Quadriceps Muscle/surgery ; Range of Motion, Articular* ; Software ; Surgeons ; Tibia/surgery ; Torso
Keywords
Computational study ; Femoral component ; Flexion ; Sagittal malposition ; Total knee arthroplasty
Abstract
PURPOSE: The kinematics and biomechanics of the knee joint are important in ensuring patient satisfaction and functional ability after total knee arthroplasty (TKA). There has been no study on knee joint mechanics with regard to the sagittal alignment of the femoral component. The objective of this study is to determine the extent of the impact of the femoral component's sagittal alignment on kinematics and biomechanics. METHODS: A validated computational TKA model was used. The femoral component was simulated at - 3°, 0°, 5°, and 7° of flexion in the sagittal plane. This study evaluated the tibiofemoral (TF) joint kinematics, contact point, quadriceps force, and contact stress on the patellofemoral (PF) joint under a deep-knee-bend condition. RESULTS: The kinematics of the TF joint in the posterior direction increased with the flexion of the femoral component position. For all tasks, the overall posterior locations of the TF contact points were observed in the medial and lateral compartments as the femoral component flexion angle increased. The quadriceps force and contact stress on the PF joint decreased with the femoral component flexion. CONCLUSION: This study found that the femoral component sagittal position is an important factor in knee joint mechanics. In this study, the flexion of femoral component showed a stable reconstruction of the knee extensors' mechanism. Surgeons may consider neutral-to-mild flexed femoral component position, without concerns of anterior notching of the femoral cortex.
Full Text
https://link.springer.com/article/10.1007%2Fs00167-018-5093-1
DOI
10.1007 / s00167-018-5093-1
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Orthopedic Surgery (정형외과학교실) > 1. Journal Papers
Yonsei Authors
Park, Kwan Kyu(박관규) ORCID logo https://orcid.org/0000-0003-0514-3257
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/173351
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