Chao E Y, Kasman R A, An K N
J Biomech. 1982;15(12):971-83. doi: 10.1016/0021-9290(82)90015-x.
The rigidity and stresses in external fracture fixation devices were studied by means of the finite element method. Different geometries and material parameters were simulated using a beam element model. Axial, bending and torsional loads were applied through the bone ends and the displacement obtained at the fracture sites was used to calculate the fracture fixation stiffness. The key parameters which increased fixation rigidity were identified. High pin stresses were predicted under certain application conditions. Possible clinical implications for the use of such apparatus are discussed in the light of bone fracture healing. The present results are expected to have a significant impact on future design modifications and clinical applications of this popular instrument in orthopedic surgery and traumatology.
采用有限元方法研究了外固定骨折装置的刚度和应力。使用梁单元模型模拟了不同的几何形状和材料参数。通过骨端施加轴向、弯曲和扭转载荷，并利用在骨折部位获得的位移来计算骨折固定刚度。确定了增加固定刚度的关键参数。预测了在某些应用条件下会出现较高的针应力。根据骨折愈合情况讨论了使用此类器械可能的临床意义。目前的结果预计将对这种在骨科手术和创伤学中广受欢迎的器械未来的设计改进和临床应用产生重大影响。
