不对称性Hangman骨折发生机制的有限元模型研究
王小平;齐伟力;黄志澎;孔抗美
【期刊名称】《中华创伤骨科杂志》 【年(卷),期】2008(010)004
【摘要】Objective To explore the injury mechanism and classification of axis fractures under different boundary conditions using precise 3D finite element models of axis. Methods Lamellar cervical CT data of a healthy adult man were collected and transferred into computer. Three-dimensional finite element models of cortical and trabecular bones of the axis were constructed from the CT data using MIMICS 10. 01software. Ansys 5.7 software was imported for material assignment and model analysis to simulate the axis injury situations. Theoretical stress distributions at the axis were calculated by applying anterior-posterior shearing force on the anterior articular surface of dens under 3 boundary conditions. The possible types of fracture that might occur under the corresponding conditions were explored. Results When the axis was subjected to anterior-posterior shearing force, 1 ) high stress concentrated at the bilateral pars interarticularis bilateral after inferior articular facet nodes of the axis were completely constrained to simulate the axis in neutral position before trauma; 2) high stress mainly distributed at one side of the pars interarticularis, the junction site of the inferior facet and laminae of the axis after one inferior articular facet
不对称性Hangman骨折发生机制的有限元模型研究
