Effects of the Mechanical Properties of Veneering Porcelain on Stress Distribution of Dental Zirconia Layered Structure:a Finite Element Model Study
The purpose of this study was to study effects of the mechanical properties of veneering porcelain on stress distribution of dental zirconia layered structure by three-dimensional finite element analysis.A 3-D geometric model of the first maxillary molar was established,a tooth preparation was simulated by the Imageware software.A crown was designed and divided into three layers:core,middle layer and outer veneer layer.The elasticity modulus of the middle layer was 70GPa for the control model up to 175GPa for the tested models.Loads of 200N were applied over a 1 mm diameter area beneath the tip of the mesial-distal cusp,simulating typical occlusal contact areas,the stress distribution of the crown systems were analyzed.Results show that within the geometry of the crown configuration,one concentration district of maximum principal stress occurred on the occlusal surface closely proximal to the loading position,several sub-maximum principal stress area were observed,such as margin regions of the mesial face,lingual face,distal faces,buccal face and occlusal fossa.Middle layer with higher modulus can effectively disperse the stress concentration in the layered zirconia all-ceramic crown system.
Dental ceramic All-ceramic layered structures Stress analysis Finite element analysis
YI Yuanfu SHAO Longquan WANG Chen WEN Ning DENG Bin TIAN Jiemo
Department of the stomatology,The General Hospital of Chinese Peoples Armed Police Forces,Beijing 1 Department of Stomatology,Nanfang Hospital,Southern Medical University,Guangzhou 510515,China The State Key Laboratory of New Ceramics and Fine Processing,Tsinghua University,Beijing 100084,Chin Department of the prosthodontics,The General Hospital of Chinese PLA,Beijing 100853,China
国际会议
The Seventh China International Conference on High-Performance Ceramics (第七届先进陶瓷国际研讨会(CICC-7))
厦门
英文
1797-1801
2011-11-04（万方平台首次上网日期，不代表论文的发表时间）