The effect of distal femoral resection on passive knee extension in posterior cruciate ligament-retaining total knee arthroplasty
The effect of distal femoral resection on passive knee extension in posterior cruciate ligament-retaining total knee arthroplasty
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DOI：
10.1016/j.arth.2005.06.008
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发表时间：
2006-02-01
影响因子：
3.5
通讯作者：
Scott, RD
中科院分区：
文献类型：
--
作者：
Bengs, BC;Scott, RD
在全膝关节置换术中，完全被动伸展的前提是产生足够大的伸展间隙，以适应任何给定的股骨和胫骨假体的组合厚度。增加股骨远端切除可以实现更多的被动膝关节伸展。股骨远端进一步切除的预测效果从未被研究过。我们设计了一个简单的机构审查委员会批准的术中研究来量化这种影响。常规的保留后交叉韧带的全膝关节置换术是通过测量股骨和胫骨的切除，产生完全被动伸展的试验性假体。然后将股骨远端假体依次应用于股骨试验假体的后部，并测量被动膝关节伸展。数据显示，股骨远端每切除2 mm，平均矫正股骨挛缩度9度。
Full passive extension in total knee arthroplasty is predicated on creating a large enough extension gap to accommodate any given combined thickness of femoral and tibial components. Additional distal femoral resection can achieve more passive knee extension. The predictable effect of further distal femoral resection has never been studied. We designed a simple institutional review board-approved, intraoperative study to quantify this effect. Routine posterior cruciate ligament-preserving total knee arthroplasty was performed with measured femoral and tibial resections, yielding full passive extension with trial components. Distal femoral augments were then sequentially applied to the back of the femoral trial component, and passive knee extension was measured. The data show that an average value of 9 degrees of femoral contracture is corrected for every 2 mm of distal femoral resection.