Mechanical axis-derived femoral component rotation in extramedullary total knee arthroplasty: a comparison between femoral transverse axis and transepicondylar axis
Mechanical axis-derived femoral component rotation in extramedullary total knee arthroplasty: a comparison between femoral transverse axis and transepicondylar axis
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DOI：
10.1007/s00167-011-1597-7
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发表时间：
2012-03-01
影响因子：
3.8
通讯作者：
Kim, Sang-Min
中科院分区：
文献类型：
--
作者：
Seo, Jai-Gon;Moon, Young-Wan;Kim, Sang-Min
股骨假体的正确旋转对准对于全膝关节置换术的成功至关重要，但关于哪种方法最可靠的争论仍在继续。本研究的目的是使用髓外股骨对准引导系统评估股骨假体的机械轴衍生旋转轴。2009年至2010年期间，60名患者（120个膝盖）同时接受了双侧全膝关节置换术。术后对所有 120 个膝盖进行了 CT 扫描。将股骨假体的机械轴衍生旋转轴与 CT 扫描上的手术经髁轴进行比较。与手术经髁轴相比，股骨假体发生外旋（平均值 = 1.6A 度，SD = 2.2A 度，范围：从内旋 4.8A 度到外旋 7.9A 度）。 120 个膝关节中有 109 个 (90.8%) 与手术经上髁轴旋转角度小于 5A 度。 CT 扫描的所有观察者间观察结果均在 +/- 2.1A 度范围内，并且没有显示显着差异。发现股骨假体的机械轴衍生旋转轴与手术经髁轴密切相关，在一定程度上表明机械轴衍生旋转轴可能是确定股骨假体最佳旋转对准的新替代选择。 全膝关节置换术中的股骨假体。
Correct rotational alignment of the femoral component is paramount to the success of total knee arthroplasty, but debate continues as to which method is the most reliable. The purpose of this study was to evaluate mechanical axis-derived rotational axis of the femoral component using an extramedullary femoral alignment guide system.Between 2009 and 2010, 60 patients (120 knees) underwent simultaneous bilateral total knee arthroplasty. Postoperative CT scans were performed on all 120 knees. The mechanical axis-derived rotational axis of the femoral component was compared with the surgical transepicondylar axis on CT scans.The femoral component was externally rotated compared with the surgical transepicondylar axis (mean = 1.6A degrees, SD = 2.2A degrees, range: from 4.8A degrees of internal rotation to 7.9A degrees of external rotation). One hundred and nine of the 120 knees (90.8%) were rotated by less than 5A degrees from the surgical transepicondylar axis. All inter-observer observations on CT scans were within a range of +/- 2.1A degrees and showed no significant differences.Mechanical axis-derived rotational axis of the femoral component was found to be closely related to the surgical transepicondylar axis, to an extent which suggests that the mechanical axis-derived rotational axis could be a new alternative option in determining optimal rotational alignment of the femoral component during total knee arthroplasty.II.