人下颌骨撞击伤三维有限元模拟及生物力学分析

目的：利用有限元模拟技术对人下颌骨撞击伤进行仿真，对模拟结果进行生物力学分析，探讨下颌骨撞击伤的致伤机制。方法采用中国可视化数字人数据，建立人下颌骨撞击伤三维有限元模型，动态模拟不同致伤条件下人下颌骨撞击动态损伤过程，采用 Von Mises 应力及有效应变进行生物力学分析。结果建立人下颌骨撞击伤三维有限元模型并成功模拟人下颌骨撞击伤动态损伤过程及骨折，髁状突及下颌角是应力、应变集中及骨折的好发部位。结论 Von Mises 应力及有效应变可作为预测和判定骨组织损伤的生物力学指标之一，利用有限元法可以有效模拟下颌骨动态撞击过程，模拟结果可为颌面部撞击伤基础研究及临床救治提供指导和数据参考。

Three-dimensional finite element simulation and biomechanical analysis of human mandible injury

Objective The simulation of the human mandible injury was carried out by using the finite element simulation technology ,and the biomechanical analysis of simulation results was developed to explore the mechanism of injuries .Methods The Chinese Visible Human digital data were used to establish the three-dimensional element model of mandible injuries ,and the dynam-ic processes of human mandible injuries in different conditions were simulated ,and the biomechanical analysis were carried out by u-sing the Von Mises stress and effective strain .Results The three-dimensional element model of mandible injuries was established , the dynamic damage and fracture of human mandible were simulated successfully ,the mandibular angle and condylar were the predi-lection parts of high-stress ,high-strain and fractures .Conclusion The Von Mises stress and effective strain can be used to predict and judge the bone tissue injuries ,the finite element method can simulate the impact injuries of mandible effectively ,and the simula-ted results can provide guidance and reference for basic research and clinical treatment of oral and maxillofacial injuries .