摘要
目的:利用有限元法分析3种不同桩核系统修复上颌中切牙薄弱根管后应力分布差异。方法:建立上颌中切牙薄弱根管桩核冠修复的三维有限元模型,应用ANSYS有限元分析软件分析CAD/CAM一体化玻璃纤维桩核、单支纤维桩核和铸造金铂合金桩核修复后Von-Mises应力和最大主应力差异。结果:一体化纤维桩核修复后的应力分布较其他两种桩核更为均匀,较少产生应力集中。结论:CAD/CAM一体化纤维桩核修复上颌中切牙薄弱根管较传统桩核方式更利于应力均匀分布,可减少桩核修复后根折的发生。
Objective:To analysis the stress distribution of maxillary incisor restored with three different post-and-cores by three-dimensional finite element analysis.Methods:The three-dimensional finite element models of maxillary central incisor restored with CAD/CAM integrated glass fiber post-and-core,prefabricated fiber core and gold alloy post-and-cores were established by CBCT and Mimics software,the Von-Mises stress and maximal tensile stress were recorded by ANSYS software.Results:The stress distribution was the most even on root when the incisor was restored with CAD/CAM integrated glass fiber post-and-core.Conclusion:CAD/CAM integrated glass fiber post-and-core is conducive to the stress distribution of flared root canal teeth,which can effectively decrease fracture of the root canals.
作者
逄键梁
冯昌芬
邓天政
朱晓茹
刘冰
PANG Jianliang;FENG Changfen;DENG Tianzheng;ZHU Xiaoru;ZHU Xiaoru(Beijing,Department of Stomatology,General Hospital of Air Force,PLA,100142,China;Suzhou Dental Hospital)
出处
《实用口腔医学杂志》
CAS
CSCD
北大核心
2018年第5期596-600,共5页
Journal of Practical Stomatology
基金
首都临床特色应用研究与成果推广项目(编号:Z151100004-015201)
关键词
三维有限元
薄弱根管
CAD/CAM一体化纤维桩核
桩核修复
Three-dimensional finite element analysis
Flared root canal
CAD/CAM integrated glass fiber post-and-core
Post-and-core restoration
