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The Modeling Study of Stress on Femur and DCP with Valgus and Varus Knee

机译：外翻和内翻膝关节对股骨和DCP应力的建模研究

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摘要

Human femur broken is one of the most frequent type of bone fractures. Basically, the widely used techniques in an internal repair is using the Dynamic Compression Plate (DCP). In addition to the configuration of the screw position plays a major role of the DCP stress, the varus and valgus knee is a factor as well. This research is proposed to investigate the stress distribution go around on the DCP by vary angle of a femur represent to valgus knee using Finite Element Analysis (FEA). To find out the stress, the body weight assumed to be constant at 70 kg. The DCP with the screws were fixed on femur for 12 units. The results from finite element analysis were compared with other authors for the normal conditions, the results moved on the same way. The results were found that the maximum Von Mises stress on the DCP was occurred on the unused hole. Both valgus and varus knee the maximum reaction forces is at lateral condyle than medial condyle and the delta of reaction forces go around 310 N plus. Both valgus and varus knee can be fixed by using DCP if the femur take angle with vertical line not reach 20 degrees. From the results also reveals that osteoarthritis from valgus knee more severe than varus knee, female have a chance to face osteoarthritis more than male due to femur angle of female larger than male.
机译：人股骨骨折是最常见的骨折类型之一。基本上，内部修复中广泛使用的技术是使用动态压缩板（DCP）。除了螺钉位置的配置在DCP应力中起主要作用外，内翻和外翻膝盖也是一个因素。提出了这项研究，以使用有限元分析（FEA）通过改变股骨代表外翻角度到DCP周围的应力分布来研究应力分布。为了找出压力，假定体重恒定为70 kg。用螺钉将DCP固定在股骨上12个单位。在正常条件下，将有限元分析的结果与其他作者进行了比较，结果以相同的方式移动。结果发现，DCP上的最大冯·米塞斯应力发生在未使用的孔上。外翻膝和内翻膝的最大反作用力都在外侧con而不是内侧con，并且反作用力的变化量约为310 N +。如果股骨与垂直线的夹角不超过20度，则可以使用DCP固定外翻膝和内翻膝。从结果还表明，外翻膝关节的骨关节炎比内翻膝关节更为严重，由于女性的股骨角大于男性，女性比男性更容易面对骨关节炎。

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