CAJ | 학술논문

目的分析人下颌骨及颞下颌关节两种不同力学模型有限元模拟的结果.方法通过CT扫描建立包含密质骨、松质骨的完整人下颌骨三维模型,将所获得的三维模型在ICEM CFD软件中划分网格.在建立的网格模型基础上,对前牙咬合的下颌骨分别建立被动肌力加载和主动肌力加载两种生物力学模型,计算并比较其应力分布.结果两个模型中的应力分布有明显区别.被动肌力加载模型中,应力主要分布于下颌角、磨牙后三角、下颌切迹以及咬合点附近牙冠.主动肌力加载模型中,应力主要分布于髁状突顶点和颈部、下颌角、磨牙后三角以及咬合点附近牙冠.两者的应力分布有一定相似之处,但在髁状突处则有很大不同,这是由于两种模型下髁状突顶点反力的大小悬殊.结论主动肌力加载模型更接近下颌骨及颞下颌关节的实际受力状态,主动肌力加载模型为前牙咬合下颌骨的合理生物力学模型.
목적 분석인하합골급섭하합관절량충불동역학모형유한원모의적결과.방법 통과CT소묘건립포함밀질골、송질골적완정인하합골삼유모형,장소획득적삼유모형재ICEM CFD연건중화분망격.재건립적망격모형기출상,대전아교합적하합골분별건립피동기력가재화주동기력가재량충생물역학모형,계산병비교기응력분포.결과 량개모형중적응력분포유명현구별.피동기력가재모형중,응력주요분포우하합각、마아후삼각、하합절적이급교합점부근아관.주동기력가재모형중,응력주요분포우과상돌정점화경부、하합각、마아후삼각이급교합점부근아관.량자적응력분포유일정상사지처,단재과상돌처칙유흔대불동,저시유우량충모형하과상돌정점반력적대소현수.결론 주동기력가재모형경접근하합골급섭하합관절적실제수력상태,주동기력가재모형위전아교합하합골적합리생물역학모형.
Objective Analysis the result of human mandible and temporomandibular joint using two different three-dimensional finite element method under different mechanical models.Methods The 3-dimensional model including cortical and cancellous bone for human mandible was obtained through computed tomography (CT) scan.Then the model was meshed in the software ICEM CFD.The passive and active muscle-force loadings were separately applied on the FE model to simulate the anterior clenching.Stress distributions in two models were compared.Results The stress distributions of two models were apparently different.In the passive muscle-force model,high stress was mainly distributed in mandibular angle,retromolar trigone,notch and bite point on crown.In the active muscle-force model,high stress was mainly distributed in condylar vertex and neck,mandibular angle,retromolar trigone and bite point on crown.There were some similarities between passive and active muscle loadings.However,large difference existed in condylar region due to the vertices reaction force disparity.Conclusion Closer to actual stressing state of human mandible and temporomandibular joint,the active muscle-force model is a proper biomechanical model for human mandible under anterior clenching.