下颌第一磨牙向受力时整体下颌骨应力有限元分析  

The analysis of the stress of the integral mandible with finite element method during the loading of occlusal force on the mandibular first molar.

作　　者：王野[1] 胡娇[2] 孙晋虎[1] 

机构地区：[1]广西医科大学口腔医学院口腔颌面外科,广西南宁530021 [2]南方医科大学南方医院口腔医学院,广东广州510515

出　　处：《临床口腔医学杂志》2012年第10期600-602,共3页Journal of Clinical Stomatology

基　　金：国家自然科学基金(31060167);广西自然科学基金(桂科自0991118);广西医疗卫生重点课题(重200928)

摘　　要：目的:采用有限元方法分析正常下颌第一磨牙咬合面受力时,下颌骨局部及整体应力变化,为种植牙对的影响提供理论依据。方法:CT扫描1例正常成年人下颌骨,Mimics14.11软件建立下颌骨模型,下颌第一磨牙面给予100 N的垂直力,有限元分析软件ABAQUS6.9-3分析整个下颌骨应力的变化。结果:下颌第一磨牙垂直受力时,下颌第一磨牙周围骨质应力应变最大处为底部偏向颊侧;整个下颌骨受力分析中,应力应变主要集中在受力的下颌第一磨牙处,其次在对侧下颌角位置,应力应变沿着下颌骨外斜线传导至髁突,显示了髁突部分应力应变的变化。结论:采用有限元方法,分析下颌第一磨牙正常咬合力时下颌骨应力应变变化,为下颌第一磨牙种植修复提供生物力学依据,以便获得最佳临床修复效果。Objective： To explore the biomechanical theory basis of the integral mandibular stress in order to search for the best clinical implant methods of first mandibular molar, through the stress and strain of local and integral jaw bone are analyzed with the finite element method in mandibular first molar occlusal force. The study can be as the initial theoreti- cal reference to evaluate the relationship between implant tooth and its occlusion. Method： Based on a CT data of an adult jaw bone,the mandibular model was built with Mimicsl4.11 software. 100 N of the vertical force was given on first mandibular molar. The stress and strain change of manduble were analyzed with finite element analysis software ABAQUS6.9-3. Result： When the vertical force is given on first mandibular molar, the most strain and stress of local bone are in the jaw bottom turn to buccal. For the whole manduble, stress and strain first mainly eoncentrated in the first molar, the second in the opposite side of the mandibular Angle. The conduction of stress and strainb is along cross-court. Mandu- ble. Conclusion：The finite element analysis method can be used for the first molar mandible mechanical analysis, and re- veal the biomechanics mechanism of the physiology and pathology process for mandibular factors.

关 键 词：第一磨牙 下颌骨 应力 有限元方法 生物力学 

分 类 号：R782.1[医药卫生—口腔医学]