Development of the veneering porcelain to the Ce-TZP/Al2O3 nanocomposite

Research Project

Project/Area Number	24890239
Research Category	Grant-in-Aid for Research Activity Start-up
Allocation Type	Single-year Grants
Research Field	Prosthetic dentistry
Research Institution	Showa University
Principal Investigator	TERUI Yuichi 昭和大学, 歯学部, 兼任講師 (00638158)
Project Period (FY)	2012-08-31 – 2014-03-31
Project Status	Completed (Fiscal Year 2013)
Budget Amount *help	¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000) Fiscal Year 2013: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000) Fiscal Year 2012: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords	セラミックス / 陶材焼付 / 材料科学 / 歯学 / 陶材焼付け
Research Abstract	The aim of this study was to examine the compatibility of Ce-TZP/Al2O3 nanocomposite (NANOZR) frameworks and veneering porcelains using the Schwickerath crack initiation test and clarify the effects on debonding/crack initiation strength(DIS) of both surface pretreatment of the frameworks and type of veneering porcelain varying the coefficient of thermal expansion(CTE). The surfaces of NANOZR plates were mechanically treated and followed by post-heat treatment. Surface analyses of the fractured plates showed compatibility with liner porcelains. Since no statistically difference in the DIS was found among the different surface treatments, post-heat treatments don't be mandatory. Whereas, since differences in DIS were found when different porcelains with different CTE were used, we concluded the matching of CTE of the porcelain with that of NANOZR was important for successful all-ceramic restorations using NANOZR frameworks.