包含颞下颌关节的颅面三维有限元模型建立

›› 2014, Vol. 34 ›› Issue (11): 811-814.

包含颞下颌关节的颅面三维有限元模型建立

王世雄¹,王旭霞¹,张文娟¹,刘宛鑫²,赵姝亚³,张君¹,陈云¹

1. 山东大学口腔医学院
2. 山东省口腔生物医学重点实验室，山东大学口腔医学院正畸科
3. 山东大学口腔医学院07级口腔医学七年制

收稿日期:2013-06-18 修回日期:2013-08-25 出版日期:2014-11-28 发布日期:2014-12-03
通讯作者: 张君 E-mail:zhangj@sdu.edu.cn
基金资助:
山东省自然基金项目;济南市高校院所自主创新计划课题;山东省医药卫生科技发展计划项目

Establishment of Three Dimensional Finite Element Model of Facies Crania including Temporomandibular Joint

Received:2013-06-18 Revised:2013-08-25 Online:2014-11-28 Published:2014-12-03

摘要/Abstract

摘要： 目的　建立包括颞下颌关节在内的颅面三维有限元模型。为日后通过前方牵引矫治力的加载，探讨前牵引矫治力及反作用力在颅上颌复合体、下颌骨、髁状突和关节窝内的应力分布。方法　通过螺旋CT扫描正常志愿者颅面部，将所获得的DICOM格式的图像导入Mimics软件，对包含颞下颌关节的颅面部进行网格划分。结果　成功建立起包括下颌骨颞下颌关节在内的颅骨三维有限元模型。所建立颅骨三维有限元模型共包含110 770个节点和28 740个单元，其中中上颌骨由76892个节点和20 387个单元构成，下颌骨由33 878个节点8 353个单元构成。该模型结构相对比较完整，网格质量良好，与生物实体真实结构具有良好的几何相似性。结论　成功建立了包括颞下颌关节在内的颅颌面三维有限元模型，所建模型具有很高的精确性，为日后进行模拟加载试验奠定了基础。

关键词: 颞下颌关节, 三维有限元模型, 颅颌面

Abstract: Objective　 To establish a 3D finite element model of the craniomaxillo face including the temporomandibular joint in order that we can study the stress and strain of the active force and reaction force in the craniomaxillarcomplex, the mandible, the condyle process and articular fossa during the maxillary protraction. Methods　The heads of the volunteers were scanned by the spiral CT, and then the DICOM data were processed by Mimics and then the thecraniomaxilloface including the temporomandibulary joint were meshed. Results　A three dimensional (3-D)finite element model (FEM) of the skull was established successfully including temporomandibular joint. The final 3-D FEM was meshed with 110770 entity elements and 28740 nodes. The model of the cranial-maxillary was meshed with 76892 entity elements and 20387 nodes, and the model of the mandibular was meshed with 33878 entity elements and 8353 nodes. The FEM established was relatively complete in structure, with good-quality elements and reasonable partitioning meshes and similar to the human anatomical structure. Conclusions　An accurate 3-D FEM of the skull including the TMJ has been established successfully. The FEM model can be used to study the stress distribution and the displacement change on the mandible when a force is loaded on the chin. A solid foundation has been laid for further study.

Key words: TMJ, 3-D finite element model, craniofacial

中图分类号:

R782.6

王世雄王旭霞张文娟刘宛鑫赵姝亚张君陈云. 包含颞下颌关节的颅面三维有限元模型建立[J]. 口腔医学, 2014, 34(11): 811-814.

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