Mechanical Properties of Dental Porcelain Discs by Different Producing Methods
The conventional method of producing porcelain standard disc specimens is based on the dental lab method for bilayer ceramic crowns,in order to reflect the clinical using condition.However heavy task is facing to the researchers,which is producing a large amount of the specimens efficiently.The press molding method is used to produce dental porcelain disc specimens in this study.Then,the basic mechanical properties of two groups of porcelain specimens were tested respectively,comparing with handmade and press molding method.The density was measured by Archimedesmethod,the flexural strength was tested by biaxial bending test,and the hardness was checked by microhardness tester.The micro features of the specimens before and after bending test were observed under optical microscope and SEM.The results showed that there was no significant difference in the flexural strength,microhardness and density of porcelain discs made by two methods.Air pores were found in all specimens with size between 5-50 micrometers.The size and distribution of pores in the specimens by press molding method are more homogeneous than handmade method.Producing dental porcelain discs for laboratory testing specimens by press molding method was much easy than handmade method.Furthermore,the mechanical properties and microstructures of the specimens made by handmade method and press molding method were almost same.
Porcelain Mechanical property
Haitao Wang Yihong Liu Yong Wang Huijuan Chen Yan Qiu Yiwang Bao
Peking University School and Hospital of Stomatology,National Engineering Laboratory for Digital and Beijing University of Chinese Medicine Dongfang Hospital,Beijing 100011,PR China State Key Lab of Green Building Materials,China Building Materials Academy,Beijing 110024,PR China
国际会议
景德镇
英文
271-275
2012-10-15（万方平台首次上网日期，不代表论文的发表时间）