Morishima Takkan, Ginsel Bastiaan L, Choy Godwin G H, Wilson Lance J, Whitehouse Sarah L, Crawford Ross W
Institute of Health and Biomedical Innovation, Queensland University of Technology, The Prince Charles Hospital, Brisbane, Queensland, Australia.
J Arthroplasty. 2014 May;29(5):1067-71. doi: 10.1016/j.arth.2013.10.016. Epub 2013 Oct 23.
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.
为了保留股骨近端骨量并在较小的股骨中实现更好的匹配，特别是在亚洲人群中，几种新的较短柄设计已可供使用。我们在Sawbone模型中研究了埃克塞特短柄与传统长度埃克塞特柄相比导致假体周围股骨骨折的扭矩。42个柄；21个较短柄和21个传统柄，两者都有三种不同的偏移量，被固定在一个复合Sawbone模型中并施加扭矩直至骨折。结果表明，与相同偏移量的传统长度埃克塞特柄相比，Sawbone股骨在使用较短柄时达到骨折的扭矩在统计学上显著更低。标准柄和短柄设计使用起来都是安全的，因为达到骨折的扭矩是日常生活活动中所见扭矩的7至10倍。
