临床口腔医学杂志2013，Vol.29Issue(1)：14-17,4.DOI:10.3969/j.issn.1003-1634.2013.01.006
不同基底瓷厚度对IPS e.max press全瓷冠应力影响的有限元分析
Influence of core thickness on the stress of IPS e.max press crown using finite element analysis
曾智惠 1段嫄嫄 1贺专 1贾骏1
作者信息
- 1. 第四军医大学口腔医学院修复科,陕西,西安,710032
- 折叠
摘要
Abstract
Objective: To investigate the effect of different core thickness on the stress of IPS e.max press crown on the base of finite element method. Method: Axisymmetric finite element models with different core thickness (0.30 mn、0.50 mn、0.75 mm、1.00 mm、1.20 mm, respectively)of all-ceramic crown of mandibular first molar was established. The loaded ball was loaded the biggest bite force of 600 N and it was concluded the stress distribution. Result: five model stress distribution area was similar; The maximum principal stress of all-ceramic which lay to core concentrated in the interface of cement and core under the load area; The maximum principal stress of veneer existed on the surface of the crown, particularly around the places the ball contacted; The maximum principal stress of abute and cement concentrated in the shoulder.The pressure stress of all-ceramic concentrated in the surface of the crown, particularly the places the ball contacted; The thickness of the core ceramic had a significant influence on the resulting stresses in the core、veneer、 abutment tooth and cement of this axially loaded crown. Conclusion: Based on the study of finite element model; when the aesthetic requirement met under the normal occlusal force, we should try to increase core ceramic thickness in order to enhance the fracture strength of all-ceramic crown and improve lifetime.关键词
IPS e.max press/有限元/应力Key words
IPS e.max press/finite element/ stress分类
医药卫生引用本文复制引用
曾智惠,段嫄嫄,贺专,贾骏..不同基底瓷厚度对IPS e.max press全瓷冠应力影响的有限元分析[J].临床口腔医学杂志,2013,29(1):14-17,4.
