摘要
目的:对比分析安氏Ⅱ1类错与正常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,构建个别正常及安氏Ⅱ1类错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:正常两侧颞下颌关节应力分布基本对称,安氏Ⅱ1类错颞下颌关节的应力分布特征与正常基本一致,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增大。结论:安氏Ⅱ1类错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。
Objective：To compare and analyze the stress distribution and biomechanic characters of temporomandibular joint（TMJ）by loading on the normal and ClassⅡ division1 occlusion using finite element models.Methods：The normal and ClassⅡdivision1three-dimensional finite element models were constructed by integrating the data of CT and MRI.And then the stress distribution in the temporomandibular joint parts was conducted after mechanical loading and boundary constraint to two models,respectively.Results：The stress distribution of the TMJ was approximately symmetrical in normal occlusion.No significant difference was found in stress distribution between normal and.However,in ClassⅡdivision1occlusion,the values on mandibular,condylar and glenoid fossa were higher,the values on joint disc were lower,and the values on top and bottom surface were higher than those in the normal occlusion.Conclusion：The stress distribution of ClassⅡdivision1 occlusion increases its risk of temporomandibular joint disorder syndrome.It should be promptly corrected to provide a good biomechanical environment for the temporomandibular joint.
出处
《口腔医学研究》
CAS
北大核心
2017年第2期194-198,共5页
Journal of Oral Science Research
关键词
安氏Ⅱ类1分类
个别正常合
颞下颌关节
三维有限元
ClassⅡdivision1
Individual normal occlusion
Temporomandibular joint
Three-dimensional finite element
