中国组织工程研究

中国组织工程研究 ›› 2010, Vol. 14 ›› Issue (30): 5586-5590.doi: 10.3969/j.issn.1673-8225.2010.30.019

• 数字化骨科 digital orthopedics • 上一篇    下一篇

桩核冠长度与直径参数化三维有限元模型的建立

高建勇1，王少海1，朱  强1，王冬梅2，郑元俐3   

  1. 1解放军第二军医大学附属长海医院口腔科，上海市 200433；2上海交通大学机械与精密仪器工程学院，上海市  200240；3上海市第九人民医院口腔修复科，上海市 200011
  • 出版日期:2010-07-23 发布日期:2010-07-23
  • 通讯作者: 郑元俐，上海市第九人民医院口腔修复科，上海市 200011
  • 作者简介:高建勇★，男，1976年生，上海市人，汉族，2008年上海交通大学医学院毕业，硕士，主治医师，主要从事口腔修复学方面的研究。 yanshaowang@126.com

Establishment of three dimensional finite element parameterization models of continuous post-and-core crown with diameter and length variation

Gao Jian-yong1, Wang Shao-hai1, Zhu Qiang1, Wang Dong-mei2, Zheng Yuan-li3   

  1. 1 Department of Stomatology, Changhai Hospital, the Second Military Medical University, Shanghai  200433, China; 2 School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai  200240, China; 3 Department of Prosthodontics, Shanghai Ninth People’s Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai  200011, China
  • Online:2010-07-23 Published:2010-07-23
  • Contact: Zheng Yuan-li, Department of Prosthodontics, Shanghai Ninth People’s Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai 200011, China
  • About author:Gao Jian-yong★, Master, Attending physician, Department of Stomatology, Changhai Hospital, the Second Military Medical University, Shanghai 200433, China yanshaowang@126.com

PDF

466

被引次数

10

摘要：

背景：由于软硬件技术的限定，长期以来对桩核冠长度、直径的研究多采用单因素、整数级变化分析，需建立多个有限元模型，分析结果存在分组间隔偏差。
目的：拟建立桩长度、直径连续变化的桩核冠系统参数化三维有限元模型。
方法：通过薄层CT断层扫描技术获得上颌中切牙二维形态数据，利用Matlab编程读取转换数据，导入Pro/E软件中读取，利用Pro/E缩放功能、曲面造型功能和布尔加减运算建立三维实体模型，应用Pro/E软件与Ansys三维有限元专用软件的无缝接口，将在Pro/E软件中装配好的模型直接导入Ansys Workbench环境中，在Ansys Workbench软件设定桩直径和长度的变化，其参数变量直径变化范围为1.0~4.1 mm，长度变化范围为3.0~8.0 mm，利用Ansys Workbench 10.0软件中的Mesh命令，直接对模型进行智能网格划分单元，进行桩核冠修复三维有限元力学分析。
结果与结论：运用Ansys Workbench软件与Pro/E软件的自适应及参数双向传递的功能，使得在桩核冠修复中建立桩直径和长度均连续变化的三维有限元模型得以实现，为桩核冠长度、直径连续变化生物力学分析奠定了实验基础。

关键词: 桩核冠, 模型, 参数化, 三维有限元, 数字化医学

Abstract:

BACKGROUND: Univariate or integer analysis is used for analyzing diameter and length variation of continuous post-and-core crown due to the limitation of software and hardware technology. Many finite element models involved in this analysis, thus, the deviation exists between groups.
OBJECTIVE: To construct three dimensional finite element models of continuous post-and-core crown with diameter and length variation.
METHODS: Thin slice CT scanning technology was used in combination with Matlab software to identify tooth margin. Pro/E and Ansys software was utilized to rebuild three dimensional maxillary central incisor model based on the thin slice CT scanning images. The diameter of post and length of post were set as the input vadables in Ansys Workbench software. The diameter of post ranged from 1.0 to 4.1 mm, and length of post ranged from 3.0 to 8.0 mm. The models were meshed and analyzed in Ansys workbench 10.0 software automatically.
RESULTS AND CONCLUSION: Establishment of three dimensional finite element models of continuous post-and-core crown of nickel-chromium alloy and carbon fiber with diameter and length variation. Continuous post diameter and length changing three dimensional finite element models can be rebuilt by bidirectionaI parameter transmit of Ansys workbench software and Pro/E software．

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