| 全瓷修复体残余应力的有限元分析 |
| |
| 引用本文： | 辛海涛,马新扬,吴玉禄. 全瓷修复体残余应力的有限元分析[J]. 实用口腔医学杂志, 2010, 26(2). DOI: 10.3969/j.issn.1001-3733.2010.02.08 |
| |
| 作者姓名： | 辛海涛 马新扬 吴玉禄 |
| |
| 作者单位： | 第四军医大学口腔医学院修复学教研室,西安,710032 |
| |
| 摘 要： | 目的:研究全瓷修复基底瓷与修饰瓷材料在高温烧结后冷却过程中残余应力的分布规律和影响因素,为临床预防全瓷修复体的损坏提供依据.方法:参考ISO96936:1999标准建立全瓷修复试样的有限元模型,对修复试样高温烧结后冷却过程中,在粘弹性和弹性不同阶段形成的残余应力进行分析,以准确描述全瓷修复试样残余应力的分布.结果:全瓷修复试样在冷却过程中基底瓷收缩变形大于修饰瓷.趋向基底瓷与修饰瓷界面,残余应力随温度降低逐渐增大;随着修饰瓷层厚度增加,界面处残余应力值逐渐减小.结论:基底瓷与修饰瓷材料热膨胀系数的差异,对于全瓷修复体残余应力分布以及修复体寿命有重要的影响, 应严格控制.全瓷材料的粘弹性对于准确分析残余应力分布有十分重要作用.
|
| 关 键 词： | 有限元分析 残余应力 牙科陶瓷 粘弹性 |
Analysis of residual stress between core and veneer ceramics by finite element method |
| |
| XIN Haitao,MA Xinyang,WU Yulu. Analysis of residual stress between core and veneer ceramics by finite element method[J]. Journal of Practical Stomatology, 2010, 26(2). DOI: 10.3969/j.issn.1001-3733.2010.02.08 |
| |
| Authors: | XIN Haitao MA Xinyang WU Yulu |
| |
| Affiliation: | XIN Haitao,MA Xinyang,WU Yulu.710032 Xi'an,Department of Prosthodonties,School of Stomatology,The Fourth Military Medical University,China |
| |
| Abstract: | Objective:To study the residual stress distribution through the thickness of bilayered dental ceramic subjected to thermal stress,in order to improve the restoration.Methods:The finite element model of bilayered dental ceramic was set up based on International Organization for Standardization(ISO)96936:1999.The residual stresses were calculated in viscoelastic and elastic phases during cooling of dental ceramic to analyze the residual stress distribution.Results:The deformation of core was greater than the ... |
| |
| Keywords: | Finite element analysis Residual stress Dental ceramics Viscoelasticity |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
