ID | 111077 |
Author |
Hamada, Daisuke
University of Tokushima
Tokushima University Educator and Researcher Directory
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Mikami, Hiroshi
Yoshinogawa Medical Center
Takasago, Tomoya
University of Tokushima
Nagamachi, Akihiro
University of Tokushima
Sairyo, Koichi
University of Tokushima
Tokushima University Educator and Researcher Directory
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Keywords | Total knee arthroplasty
posterior condylar cartilage
condylar twist angle
navigation system
femoral rotation
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Content Type |
Journal Article
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Description | Rotational alignment of the femoral component in total knee arthroplasty (TKA) is important for patellar tracking and ligament balance. Preoperative planning based on radiography might have a potential risk for over-rotation because these X-ray based measurements can not detect asymmetric cartilage wear on posterior condyle. The purpose of this study is to evaluate the effect of the posterior condylar cartilage of varus osteoarthritic knee on rotational alignment of the femoral component in TKA. We established two different condylar twist angles (CTA) from intraoperative multiplanar reconstruction (MPR) images and intraoperative information of navigation system. The CTA measured by a navigation system that includes the cartilage (4.8±2.0°) was smaller than those measured by MPR images, which does not include the cartilage (6.6±2.1°) (p<0.05). The difference between these two angles that corresponds to the remaining posterior condylar cartilage was 1.7±1.2°. This result demonstrated that the posterior condylar cartilage might lead to over-rotational of the femoral component in varus osteoarthritic knee. Therefore, when determining rotational alignment of the femoral component, surgeons should consider the effect of the remaining posterior condylar cartilage to avoid the over-rotation of the femoral component, especially in severe varus knees.
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Journal Title |
The Journal of Medical Investigation
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ISSN | 13496867
13431420
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NCID | AA11166929
AA12022913
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Publisher | Faculty of Medicine Tokushima University
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Volume | 64
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Issue | 1-2
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Start Page | 24
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End Page | 29
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Sort Key | 24
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Published Date | 2017-02
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EDB ID | |
DOI (Published Version) | |
URL ( Publisher's Version ) | |
FullText File | |
language |
eng
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TextVersion |
Publisher
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departments |
University Hospital
Medical Sciences
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