中国组织工程研究 ›› 2021, Vol. 25 ›› Issue (20): 3125-3129.doi: 10.3969/j.issn.2095-4344.3217

• 口腔组织构建 oral tissue construction • 上一篇    下一篇

构建3种不同上颌牙弓形态的有限元模型

李圆圆,鲁颖娟,叶玉珊,Mustafa M.M Weldali,常少海   

  1. 中山大学孙逸仙纪念医院口腔科,广东省广州市   510120
  • 收稿日期:2020-05-22 修回日期:2020-05-23 接受日期:2020-06-29 出版日期:2021-07-18 发布日期:2021-01-15
  • 通讯作者: 常少海,副教授,副主任医师,中山大学孙逸仙纪念医院口腔科,广东省广州市 510120
  • 作者简介:李圆圆,女,1994年生,湖南省衡阳市人,汉族,2020年中山大学毕业,硕士,医师,现工作于广州市海珠区口腔医院,主要从事口腔正畸学方面的研究。
  • 基金资助:
    广东省科技计划项目(A002014004),项目负责人:常少海

Constructing finite element models of three maxillary arch forms

Li Yuanyuan, Lu Yingjuan, Ye Yushan, Mustafa M.M Weldali, Chang Shaohai   

  1. Department of Stomatology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, Guangdong Province, China
  • Received:2020-05-22 Revised:2020-05-23 Accepted:2020-06-29 Online:2021-07-18 Published:2021-01-15
  • Contact: Chang Shaohai, Associate professor, Associate chief physician, Department of Stomatology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, Guangdong Province, China
  • About author:Li Yuanyuan, Master, Physician, Department of Stomatology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou 510120, Guangdong Province, China
  • Supported by:
    dental arch form; maxillary; orthodontics; three-dimensional; finite element; biomechanics

摘要:

文题释义:
牙弓形态:从牙列牙合面形态进行观察,根据6个前牙的排列情况,将牙列分成3种基本类型,分别为牙弓中的4个切牙的切缘唇侧连线略直,弓形从尖牙的远中才开始弯曲向后的方圆型;上颌牙弓自侧切牙起就向后弯曲,牙弓的前牙段向前突出比较多的尖圆型;介于前两者之间,牙弓从上颌侧切牙远中开始向后逐渐弯曲的卵圆型。不同的牙弓形态与口腔颌面部软组织功能息息相关,其改变也对微笑美观产生一定的影响。
三维有限元模型:基于CT扫描文件,采用 Mimics 建模,再导入有限元求解器ANSYS来实现三维有限元模型的建立。该方法是一种有效的预测牙齿受力和移动的应力分析方法,在口腔生物学领域应用广泛,只有建立精确的三维模型,才能对后期的应用分析提供良好的基础。

背景:口腔治疗中牙弓形态常被认为是一个重要的因素,但其三维有限元模型暂未被建立。
目的:建立模拟正畸治疗后方圆型、卵圆型、尖圆型牙弓形态的三维有限元模型。
方法:选取1例牙列完整的正畸治疗后成年女性患者的颌面部CT断层影像,利用Mimics 20.0软件、Geomagic Studio(2014)软件、UnigraphicsNX(10.0)软件、ANSYS(18.2)有限元分析软件,生成一个完整的上颌牙弓模型。再通过运算得到的不同牙弓形态的方程式,导入已建立的牙弓模型后,构建方圆型、卵圆型、尖圆型牙弓的三维有限元模型。
结果与结论:①得到描绘弓形的四阶多项式函数,并成功建立方圆型、卵圆型、尖圆型牙弓的三维有限元模型;②方圆型牙弓包含节点总数398 098 个,单元总数223 751个;卵圆型牙弓包含节点总数401 800 个,单元总数226 177 个;尖圆型牙弓包含节点总数404 434个,单元总数227 430 个,可为后续的力学分析和临床实践提供可靠的基础。
https://orcid.org/0000-0003-1310-4880 (李圆圆) 

中国组织工程研究杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松;组织工程

关键词: 牙弓形态, 上颌, 正畸, 三维, 有限元, 生物力学

Abstract: BACKGROUND: Dental arch shape is often considered as an important factor in oral treatment; however, there is no report on the construction of three-dimensional finite element models of different dental arches.
OBJECTIVE: To establish the three-dimensional finite element models of maxillary dental arches including square, ovoid, tapered.
METHODS: An adult female patient after orthodontic treatment was selected as the subject of this study and her CT data were analyzed used Mimics 20.0 software, Geomagic Studio (2014) software, UnigraphicsNX (10.0) software and ANSYS (18.2) finite element analysis software to generate a complete model of maxillary dental arch. Then, through the calculation of the equations of different dental arch shapes and guide the equations into established dental arch model, three-dimensional finite element models of square, ovoid and tapered dental arches were constructed.
RESULTS AND CONCLUSION: A fourth-order polynomial function describing the dental arch shape was obtained and three-dimensional finite element models of square, ovoid and tapered maxillary dental arch were successfully constructed. Square arch had 398 098 nodes and 223 751 units, ovoid arch had 401 800 nodes and 226 177 units, and tapered arch had 404 434 nodes and 227 430 units. These will provide a reliable basis for subsequent biomechanical analysis and clinical practice.

Key words: dental arch form, maxillary, orthodontics, three-dimensional, finite element, biomechanics

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