Effects of small-grit grinding and glazing on mechanical behaviors and ageing resistance of a super-translucent dental zirconia

doi:10.1016/j.jdent.2017.09.003

	Effects of small-grit grinding and glazing on mechanical behaviors and ageing resistance of a super-translucent dental zirconia
	Lai, Xuan ; Si, Wenjie 1; Jiang, Danyu 2; Sun, Ting ; Shao, Longquan ; Deng, Bin 3
刊名	JOURNAL OF DENTISTRY
	2017
卷号	66 页码:23
ISSN号	0300-5712
DOI	10.1016/j.jdent.2017.09.003
英文摘要	Objectives: The purpose of this study is to elucidate the effects of small-grit grinding on the mechanical behaviors and ageing resistance of a super-translucent dental zirconia and to investigate the necessity of glazing for the small-grit ground zirconia. Methods: Small-grit grinding was performed using two kinds of silicon carbide abrasive papers. The control group received no grinding. The unground surfaces and the ground surfaces were glazed by an experienced dental technician. Finally, the zirconia materials were thermally aged in water at 134 degrees C for 5 h. After aforementioned treatments, we observed the surface topography and the microstructures, and measured the extent of monoclinic phase, the nano-hardness and nano-modulus of the possible transformed zone and the flexural strength. Results: Small-grit grinding changed the surface topography. The zirconia microstructure did not change obviously after surface treatments and thermal ageing; however, the glaze in contact with zirconia showed cracks after thermal ageing. Small-grit grinding did not induce a phase transformation but improved the flexural strength and ageing resistance. Glazing prevented zirconia from thermal ageing but severely diminished the flexural strength. The nano-hardness and nano-modulus of the surface layer were increased by ultrafine grinding. Conclusions: The results suggest that small-grit grinding is beneficial to the strength and ageing resistance of the super-translucent dental zirconia; however, glazing is not necessary and even impairs the strength for the supertranslucent dental zirconia. Clinical significance: This study is helpful to the researches about dental grinding tools and maybe useful for dentists to choose reasonable zirconia surface treatments.
WOS记录号	WOS:000414697500004
内容类型	期刊论文
源URL	[http://ir.sic.ac.cn/handle/331005/26637]
专题	中国科学院上海硅酸盐研究所
作者单位	1.Southern Med Univ, Nanfang Hosp, Dept Stomatol, Guangzhou 510515, Guangdong, Peoples R China 2.Tsinghua Univ, Sch Mat Sci & Engn, Beijing 100084, Peoples R China 3.Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China 4.Gen Hosp Chinese PLA, Dept Prosthodont, Beijing 100853, Peoples R China
推荐引用方式 GB/T 7714	Lai, Xuan,Si, Wenjie,Jiang, Danyu,et al. Effects of small-grit grinding and glazing on mechanical behaviors and ageing resistance of a super-translucent dental zirconia[J]. JOURNAL OF DENTISTRY,2017,66:23.
APA	Lai, Xuan,Si, Wenjie,Jiang, Danyu,Sun, Ting,Shao, Longquan,&Deng, Bin.(2017).Effects of small-grit grinding and glazing on mechanical behaviors and ageing resistance of a super-translucent dental zirconia.JOURNAL OF DENTISTRY,66,23.
MLA	Lai, Xuan,et al."Effects of small-grit grinding and glazing on mechanical behaviors and ageing resistance of a super-translucent dental zirconia".JOURNAL OF DENTISTRY 66(2017):23.