CAJ | 학술논문

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61 512个,三面体4 030个,四面体5 450个,节点67 159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.
목적 건립저하합골당격상삼유유한원모형병진행동태모의화험증,탐토유한원수치모의기술재합골당격상중응용적가행성화가고성. 방법 채용CT소묘수거건립저하합골당격상삼유유한원모형,동태모의저하합골당격동태손상과정.모의적결과여동물실험대비병진행능량수항검사,험증모형화모의방법적가고성화진실성. 결과 성공건립저하합골당격상삼유유한원모형,기중륙면체61 512개,삼면체4 030개,사면체5 450개,절점67 159개.모의과정진실핍진,응변、가속도등생물역학지표여동물실험실측수거차이무통계학의의(P＞0.05).손상후형태여동물실험표본유교고적상사성,능량검사부합수항정률. 결론 이용유한원법가이유효모의하합골동태당격과정,모형급모의결과가고유효,가응용우합면부당격상치상궤제적연구.
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 biomechanical 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.