下颌骨三维有限元模型分析模拟咬合创伤对髁突的力学影
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陈建中;杨春;王维琦;代自超;杨荣强;张丽;谢亮焜
【期刊名称】《昆明医科大学学报》 【年(卷),期】2018(039)006
【摘要】目的 建立下颌骨的三维有限元模型,模拟可导致咬合创伤的异常咬合力,研究对髁突力学影响及位移变化,为临床研究TMD与咬合创伤提供实验证据.方法 选咬合关系正常的男性志愿者,CBCT扫描后得到DICOM数据,髁突顶作约束设计,经划分网格生成有限元模型.工况一:左侧下颌第1磨牙不咬合接触面垂直加载不同负荷;工况二在同一模型上设计颊侧方向不同负荷,研究不同工况下左侧髁突处应力分布变化的规律.结果 建立了下颌骨的三维有限元模型,随着载荷的成倍数增加,髁突受力范围一致,但张力和应力也成倍数增加.然后模拟咬合创伤条件下相同牙位施加相同载荷后,应力较垂直负荷时变大,髁突位移距离也增加,结论形成咬合创伤的异常咬合力,可影响髁突的力学传导,导致髁突的病理性改变.%Objective To provide evidence for the relationship between TMD and occlusal trauma by studying the mechanics influence and displacement of condyle by building the three dimensional finite element analysis model andstimulating the abnormal bite force leading occlusal trauma.Methods We collected DICOM date of healthy male volunteers with normal occlusal relationship using CBCT scan with constraint on condylar top and formed the finite model with divide mesh.Two conditions were built: (1) We operated different vertical load
on the left mandibular molar occlusal surface; (2) We operated different buccal direction load on the same modelto study the mechanic change on left condylar.Results When the three dimensional finite model of mandible was built, the mechanic region of condyle stayed the same but the stress and tension increased accordingly as the loda duplicate rose. As the same buccal operation load was operated,the stress and tension became larger and the displacement became longer.Conclusion The abnormal bite force causing occlusal trauma can change mechanic conduct on condyle and lead to the pathological change of condyle. 【总页数】4页(82-85)
【关键词】有限元模型;髁突;咬合创伤;力学影响
【作者】陈建中;杨春;王维琦;代自超;杨荣强;张丽;谢亮焜
【作者单位】昆明医科大学附属口腔医院;昆明医科大学附属口腔医院;云南省口腔医学研究所,云南昆明 650100;云南省口腔医学研究所,云南昆明 650100;云南省口腔医学研究所,云南昆明 650100;昆明医科大学学报编辑部,云南昆明 650500;昆明医科大学附属口腔医院 【正文语种】中文 【中图分类】R782.6 【文献来源】
https://www.zhangqiaokeyan.com/academic-journal-cn_journal-kunming-medical-university_thesis/0201244869550.html 【相关文献】
1.下颌骨三维有限元模型分析模拟咬合创伤对髁突的力学影响 [J], 陈建中[1]; 杨春[1]; 王维琦[2]; 代自超[2]; 杨荣强[2]; 张丽[3]; 谢亮焜[1]
2.下颌骨三维有限元模型的边界约束设计 [J], 周学军; 赵志河; 赵美英; 樊瑜波 3.含多个种植体的无牙下颌骨三维有限元模型的建立 [J], 简波; 宋应亮; 李德华; 张文超
4.下颌骨牙槽嵴萎缩三维有限元模型与生物力学分析 [J], 仇敏; 何黎升 5.建立模拟功能状态下的下颌骨三维有限元模型 [J], 胡凯
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下颌骨三维有限元模型分析模拟咬合创伤对髁突的力学影响
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