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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 analyze the local and global stress changes of the mandibular mandibular under the occlusal stress of the normal mandibular first molar using finite element method (FEM), which provides a theoretical basis for the effects of dental implants. METHODS: One adult with mandible was scanned by CT. Mimics14.11 software was used to establish the mandible model. The vertical force of 100 N was applied to the first mandibular molar face. The stress of the entire mandible was analyzed by finite element analysis software ABAQUS6.9-3 . Results: When the mandibular first molar was subjected to vertical force, the maximal stress and strain of the bone around the first molar of the mandibular was at the bottom to the buccal side. During stress analysis of the mandibular, the stress and strain mainly concentrated on the mandibular first molar, Second, in the contralateral mandibular angle position, stress and strain were transferred to the condyle along the external mandibular oblique line, indicating the change of stress and strain in the condyle. Conclusion: The finite element method is used to analyze the stress and strain changes of the mandibular first molar during normal occlusal force, providing the biomechanical basis for implant restoration of the first molar in order to obtain the best clinical repair effect.