ID | 111077 |
著者 |
Mikami, Hiroshi
Yoshinogawa Medical Center
高砂, 智哉
University of Tokushima
長町, 顕弘
University of Tokushima
|
キーワード | Total knee arthroplasty
posterior condylar cartilage
condylar twist angle
navigation system
femoral rotation
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資料タイプ |
学術雑誌論文
|
抄録 | 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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掲載誌名 |
The Journal of Medical Investigation
|
ISSN | 13496867
13431420
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cat書誌ID | AA11166929
AA12022913
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出版者 | Faculty of Medicine Tokushima University
|
巻 | 64
|
号 | 1-2
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開始ページ | 24
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終了ページ | 29
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並び順 | 24
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発行日 | 2017-02
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EDB ID | |
出版社版DOI | |
出版社版URL | |
フルテキストファイル | |
言語 |
eng
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著者版フラグ |
出版社版
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部局 |
病院
医学系
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