Effect of sandblasting on bending strength and subcritical crack growth of the dental zirconia ceramics
10.3760/cma.j.issn.1002-0098.2017.07.009
- VernacularTitle: 喷砂对口腔氧化锆陶瓷抗弯强度和亚临界裂纹扩展的影响
- Author:
Xu GONG
1
;
Xinyi ZHAO
1
;
Chunbao ZHANG
2
;
Shibao LI
1
;
Yulu WU
2
;
Bing WU
2
Author Information
1. Department of Dental Materials, School of Stomatology, The Fourth Military Medical University & State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Xi'an 710032, China
2. Department of Laboratory Center, School of Stomatology, The Fourth Military Medical University & State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Xi'an 710032, China
- Publication Type:Journal Article
- Keywords:
Dental porcelain;
Sandblasting;
Bending strength;
Subcritical crack growth
- From:
Chinese Journal of Stomatology
2017;52(7):439-442
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To evaluate the effect of sandblasting on bending strength and subcritical crack growth (SCG) under cyclic loading of yttria-stabilized tetragonal zirconia polycrystal (Y-TZP) ceramics.
Methods:After being polished, sixty bar-shaped specimens of Y-TZP (Wieland zirconia ceramics) were assigned to two groups (n=30) according to the random number table, the sandblasting group (SG) which was treated with sandblasting and the control group (CG) which remained untouched. In each group, half of the specimens (n=15) were subjected to bending strength test, and the results were examined by Weibull statistics and analyzed with ANOVA. The other 15 specimens in each group were subjected to fatigue tests. The results were examined by Weibull statistics and subcritical crack propagation rates were calculated.
Results:The bending strengths of SG and CG were (1 291±133) and (1 140±124) MPa (F=10.117, P=0.004), and the Weibull modules of the two groups were 11.06 and 10.64 respectively. The crack growth rate of SCG of SG was lower than that of CG under the same cyclic loading.
Conclusions:Proper sandblasting on Y-TZP ceramic can increase its bending strength and resistance to SCG.
