上海交通大学学报（医学版）

上海交通大学学报（医学版） ›› 2013, Vol. 33 ›› Issue (6): 768-.doi: 10.3969/j.issn.1674-8115.2013.06.014

• 论著（基础研究） • 上一篇    下一篇

全瓷修复体界面仿生功能梯度层的优化设计

崔 畅1，孙 健1，孙 芳2   

  1. 1．上海交通大学 医学院附属第九人民医院口腔修复科  上海市口腔医学重点实验室， 上海 200011； 2.上海交通大学 数字医学教育部工程研究中心， 上海 200030
  • 出版日期:2013-06-28 发布日期:2013-06-28
  • 通讯作者: 孙健, 电子信箱: doctorsunjian74@yahoo.com.cn。
  • 作者简介:崔 畅（1988—）， 硕士生; 电子信箱: 841748902@qq.com。
  • 基金资助:

    上海市教委科研创新项目（重点项目）（12ZZ116）；上海市重点学科建设项目（T0202，S30206）

Optimization design of bioinspired functionally graded interface layer of all ceramic restoration

CUI Chang1, SUN Jian1, SUN Fang2   

  1. 1.Department of Prosthodontics, the Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai Key Laboratory of Stomatology, Shanghai 200011, China; 2.Engineering Research Center of Digital Medicine, Ministry of Education, Shanghai Jiaotong University, Shanghai 200030, China
  • Online:2013-06-28 Published:2013-06-28
  • Supported by:

    Shanghai Science and Technology Committee Foundation, 12ZZ116; Shanghai Leading Academic Discipline Project, T0202, S30206

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摘要：

目的 探讨全瓷修复体界面仿生功能梯度层优化设计方案。方法 建立双层瓷/仿生功能梯度层/粘结剂/牙本质基底的三维平面有限元模型，根据所采用的核瓷材料的不同分为实验Ⅰ组（核瓷为氧化锆）和实验Ⅱ组（核瓷为二烯酸铝），进行三维有限元力学分析，并采用ANSYS软件中的一阶方法对功能梯度层弹性模量的梯度变化进行优化计算分析。以双层瓷/粘结剂/牙本质基底的三维平面有限元模型作为对照。结果 实验Ⅰ组功能梯度层中最大主应力为23.028 6 MPa，应力分布均匀且平稳过渡；而对照组在核瓷底部出现了应力集中，最大主应力值为100.25 MPa。实验Ⅱ组功能梯度层中最大主应力为15.966 5 MPa，应力分布均匀且平稳过渡；而对照组在核瓷底部出现了应力集中，最大主应力值为73.884 MPa。分别得到了实验Ⅰ、Ⅱ组功能梯度层内弹性模量梯度变化的优化曲线。结论 仿生界面功能梯度层能有效降低全瓷修复体核瓷底部的应力集中，其内部弹性模量的梯度变化存在优化方式。

关键词: 全瓷, 仿生功能梯度层, 优化

Abstract:

Objective To explore the optimization design of bioinspired functionally graded interface layer of all ceramic restoration. Methods Three dimensional planar finite element model of bilayered ceramic/bioinspired functionally graded layer/cement/dentine was established. Experiment groupⅠ (Zirconia as the core material) and experiment group Ⅱ(Diene acid aluminum as the core material) were divided according to different core materials, and three dimensional finite element analysis was performed. The optimization analysis of graded change of elastic modulus of bioinspired functionally graded layer was conducted by first order optimization method. Besides, the three dimensional planar finite element model of bilayered ceramic/cement/dentine was served as control. Results For experiment groupⅠ, the stress uniformly distributed in bioinspired functionally graded layer with the maximum principal stress value of 23.0186 MPa, and a smooth stress transition from bioinspired functionally graded layer to cement was found. As for control group of experiment groupⅠ, stress concentration was found at the sub-surface of the core with the maximum principal stress value of 100.25 MPa. For experiment group Ⅱ, the stress uniformly distributed in bioinspired functionally graded layer with the maximum principal stress value of 15.9 665 MPa, and a smooth stress transition from bioinspired functionally graded layer to cement was found. As for control group of experiment group Ⅱ, stress concentration was found at the sub-surface of the core with the maximum principal stress value of 73.884 MPa. The optimization curves of elastic modulus gradient change of bioinspired functionally graded layer of experiment groupⅠ and experiment group Ⅱ were obtained. Conclusion The existence of bioinspired functionally graded layer can significantly reduce the stress concentration at the sub-surface of the core, and there exists optimization of elastic modulus graded change in bioinspired functionally graded layer.

Key words: all ceramic, bioinspired functionally graded layer, optimization