下颌骨颏部爆炸伤三维有限元仿真及生物力学分析  

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

作　　者：雷涛[1] 郑加军[1] 王婷婷[1] 李瑛[1] 谢良宪[1] 

机构地区：[1]解放军第三二四医院口腔科,重庆400020

出　　处：《中华创伤杂志》2015年第11期1050-1055,共6页Chinese Journal of Trauma

基　　金：全军青年培育基金资助项目（13QNP066）

摘　　要：目的利用有限元数字模拟技术动态仿真人下颌骨颏部爆炸伤损伤过程，并进行生物力学分析，探讨颌面部爆炸伤致伤机制。方法建立人下颌骨爆炸伤三维有限元模型，动态模拟颏部在不同致伤条件下爆炸动态损伤过程，利用Von Mises应力及有效应变对模拟的结果进行生物力学分析结果成功模拟人下颌骨颏部爆炸伤动态损伤过程并进行致伤机制的生物力学分析，在1000mg、3cm条件下，髁状突颈部Von Mises应力及有效应变值最高（9．1×10^6Pa及0．62×10^-3ε）、下颌角正中次之（6．1×10^5Pa及0．42×10^-3ε）、下颌骨颏孔区最小（6．1×10^6Pa及0．39×10^-3ε），距离较爆炸当量对各力学指标及损伤程度影响更为明显。结论有限元法可以有效模拟下颌骨爆炸伤，为口腔颌面部爆炸伤临床救治提供新的思路和途径。Objective To simulate a finite element model for biomechanical analysis of mandible chin blast injury and analyze the mechanism of maxillofacial blast injury. Methods The three-dimen- sional element model of human mandible blast injury was established to simulate the dynamic process of injury to the mandible chin. Von Mises stress and effective strain were evaluated in biomeehanieal study of the simulation results. Results The dynamic damage process of human mandible chin blast injury was simulated successfully. In the condition of 1 000 mg and 3 cm, the Von Mises stress and effective were maximum at condylar neck region （9.1×10^6Pa,0.62×10^-3ε） , were second at mandibular angle region （6.1×10^5Pa,0.42×10^-3ε）, and minimum at mental foramen region （6.1×10^6Pa,0.39×10^-3ε）. Blast distance rather than blast equivalent produced more effect on the mechanical parameters and damage degree. Conclusions Von Mises stress and effective strain can be applied to the evaluation of bone tissue damage. The finite element method is effective in simulating mandible blast injury and can provide a new thought and approach to clinical treatment of oral and maxillofacial blast injury.

关 键 词：下颌损伤 有限元分析 生物力学 

分 类 号：R782[医药卫生—口腔医学]