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- 2017
安氏Ⅱ1类患者颞下颌关节三维有限元分析
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Abstract:
摘要 目的:对比分析安氏Ⅱ1类错牙合与正常牙合在牙尖交错位紧咬牙时颞下颌关节的应力分布。方法:运用相关软件将志愿者的CT及MRI数据融合,构建个别正常牙合及安氏Ⅱ1类错牙合颞下颌关节有限元模型,分别对其进行边界约束和力学加载,分析描述两者颞下颌关节各个部位的应力分布。结果:正常牙合两侧颞下颌关节应力分布基本对称,安氏Ⅱ1类错牙合颞下颌关节的应力分布特征与正常牙合基本一致,但下颌骨、髁突及颞骨关节窝的等效应力值比正常牙合增大;关节盘的等效应力有所下降,但其上下表面的中间带应力值比正常牙合增大。结论:安氏Ⅱ1类错牙合患者在牙尖交错位时的应力分布增大了其罹患颞下颌关节紊乱病的危险性,应及时矫治为其颞下颌关节提供一良好的生物力学环境
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