口腔医学研究

口腔医学研究 ›› 2016, Vol. 32 ›› Issue (12): 1296-1298.DOI: 10.13701/j.cnki.kqyxyj.2016.12.017

• 临床研究论著 • 上一篇    下一篇

不同粘接剂对中切牙全瓷冠应力分布的影响

闫嘉群*,朱焱 ,王太和 ,苏红   

  1. 哈尔滨医科大学附属肿瘤医院口腔科 黑龙江 哈尔滨 150086
  • 收稿日期:2016-06-06 出版日期:2016-12-25 发布日期:2016-12-26
  • 通讯作者: 闫嘉群,E-mail:iamkaren@163.com
  • 作者简介:闫嘉群(1981~ ),女,哈尔滨市人,主治医师,硕士,主要从事口腔修复、口腔颌面外科的临床治疗工作。
  • 基金资助:
    哈尔滨医科大学附属肿瘤医院海燕基金青年项目(编号:JJQN2014-11)

Effect of Cements on Stress Distribution of All Ceramic Crowns at Central Incisors.

YAN Jia-qun*, ZHU Yan, WANG Tai-he, SU Hong.   

  1. Department of Stomatology, Harbin Medical University Cancer Hospital, Harbin 150086, China.
  • Received:2016-06-06 Online:2016-12-25 Published:2016-12-26

PDF (PC)

279

被引次数

2

摘要： 目的:探讨不同种类粘接剂对双层结构的全瓷冠及粘结剂应力分布的影响。方法:利用CBCT图像,构建双层结构的全瓷冠(核瓷层和饰瓷层),粘接剂层,牙体组织,牙根,牙周膜,牙槽骨各部分的三维有限元模型,设计3种不同咬合方向载荷200N 的加载方式,分析不同种类的粘接剂(3M Luting2组、DMG PermaCem组以及Kerr Maxcem Elite组)粘固后,饰瓷层及粘接剂层的应力大小及分布状况。结果:粘接层和饰瓷层应力主要集中在加载点附近。随着粘接材料弹性模量的增加,粘接剂的等效应力和最大主应力均呈上升趋势,位于饰瓷层的等效应力和最大主应力呈现出下降的趋势。结论:全瓷冠在不同粘接材料粘固后受到力的作用时,等效应力和最大主应力分布有向加载侧分布的趋势。使用高弹性模量的粘接剂可能会降低全瓷冠的受力,减少崩瓷的发生。

关键词: 三维有限元, 全瓷冠, 应力分布

Abstract: Objective: To investigate the effect of cements on the stress distribution of all ceramic crowns and agglomerants. Methods: CBCT images was used to construct the finite element analysis mode, including the core layer and the veneer layer of the crown, cement, tooth crown, tooth root, periodontal ligament and alveolar bone. 200N load was designed in three directions. The stress values of the veneer layer and the cement layer with different kinds of cements (3M Luting2, DMG PermaCem, and Kerr Maxcem elite) were analysed by ANSYS software. The equivalent stress (Von Mises stress) and the maximum principal stress (S1 stress) distribution were recorded. Results: The stress on the cement layer and the veneer layer were mainly concentrated around the loading point. With the increasing of elastic modulus of the cements, the Von Mises stress and the S1 stress on the cement layer was enhanced, but the von Mises stress and the S1 stress on the veneer layer was reduced. Conclusion: In the loading test, the Von Mises stress and the S1 stress on the all ceramic crown with different kinds of cements were tended to concentrate on the loading side. The cements with high elastic modulus may reduce the stress on the veneer layer of the crown.

Key words: 3-dimensional finite element, All-ceramic crown, Stress distribution

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