猪下颌骨撞击伤三维有限元模型建立及验证  

Establishment and simulation validation of a three-dimensional finite element model of pig mandible impact injury

作　　者：雷涛[1] 李瑛[1] 郑加军[1] 王婷婷[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8期743-747,共5页Chinese Journal of Trauma

基　　金：全军青年培育基金资助项目（13QNP066）;重庆市自然科学基金面上资助项目（cstc2013jycjA10028）

摘　　要：目的建立猪下颌骨撞击伤三维有限元模型并进行动态模拟和验证，探讨有限元数值模拟技术在颌骨撞击伤中应用的可行性和可靠性。方法采用CT扫描数据建立猪下颌骨撞击伤三维有限元模型，动态模拟猪下颌骨撞击动态损伤过程。模拟的结果与动物实验对比并进行能量守恒检查，验证模型和模拟方法的可靠性和真实性。结果成功建立猪下颌骨撞击伤三维有限元模型，其中六面体61512个，三面体4030个，四面体5450个，节点67159个。模拟过程真实逼真，应变、加速度等生物力学指标与动物实验实测数据差异无统计学意义（P〉0．05）。损伤后形态与动物实验标本有较高的相似性，能量检查符合守恒定律。结论利用有限元法可以有效模拟下颌骨动态撞击过程，模型及模拟结果可靠有效，可应用于颌面部撞击伤致伤机制的研究。Objective To develop a three-dimensional element model of pig mandible impact injury and test the simulation results in an attempt to determine the feasibility and reliability of finite element numerical simulation method used in the maxillofacial impact injury. Methods CT data was used to develop a three-dimensional finite element model of pig mandible impact injury, and the dynamic process of impact injury was simulated. The simulation results were compared with the animal experiment and had energy check to validate the reliability and feasibility of the modeling and simulation methods. Results The three-dimensional finite element model was established successfully, containing 61,512 hexahedrons, 5,450 tetrahedrons, 4,030 trihedrons, and 67,159 nodes. The simulation process was realistic, and the simulation results showed no statistical difference with the animal experiment with regard to strain, acceleration, and other biomechanieal properties （ P 〉 0.05 ）. The simulated damage shape had a high similarity with animal specimens, and the result of energy check also complied with energy conservation law. Conclusion Finite element method is effective to simulate the dynamic process of mandible impact which ensures a correct and reliable model and simulation, and thus can be used to analyze the mechanism of maxillofacial impact injury.

关 键 词：下颌骨 有限元分析 猪 

分 类 号：R782.4[医药卫生—口腔医学]