Periprosthetic Fracture Torque for Short Versus Standard Cemented Hip Stems: An Experimental In Vitro Study
Periprosthetic Fracture Torque for Short Versus Standard Cemented Hip Stems: An Experimental In Vitro Study
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DOI：
10.1016/j.arth.2013.10.016
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发表时间：
2014-05-01
影响因子：
3.5
通讯作者：
Crawford, Ross W.
中科院分区：
文献类型：
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作者：
Morishima, Takkan;Ginsel, Bastiaan L.;Crawford, Ross W.
为了保留股骨近端骨量并在较小股骨中实现更好的匹配，特别是在亚洲人群中，已经有几种新的较短股骨柄设计可用。我们在人工骨模型中研究了埃克塞特短股骨柄与传统长度埃克塞特股骨柄的假体周围股骨骨折扭矩。四十二茎;在复合人工骨模型中使用骨水泥固定了21个较短股骨柄和21个传统股骨柄（均具有3种不同偏心距），并扭转至断裂。结果表明，与相同偏心距的传统长度埃克塞特股骨柄相比，人工骨股骨柄在统计学上显著更低的失效扭矩下断裂。标准股骨柄和短股骨柄设计均可安全使用，因为失效扭矩是日常生活活动中所见扭矩的7-10倍。(C)2014爱思唯尔公司All rights reserved.
In an attempt to preserve proximal femoral bone stock and achieve a better fit in smaller femora, especially in the Asian population, several new shorter stem designs have become available. We investigated the torque to periprosthetic femoral fracture of the Exeter short stem compared with the conventional length Exeter stem in a Sawbone model. Forty-two stems; 21 shorter and 21 conventional stems both with three different offsets were cemented in a composite Sawbone model and torqued to fracture. Results showed that Sawbone femurs break at a statistically significantly lower torque to failure with a shorter compared to conventional-length Exeter stem of the same offset. Both standard and short-stem designs are safe to use as the torque to failure is 7-10 times that seen in activities of daily living. (C) 2014 Elsevier Inc. All rights reserved.