Effects of multiple firings on the microstructure of zirconia and veneering ceramics

被引：12

作者：

Alkurt, Murat ^{[1
]}

Duymus, Zeynep Yesil ^{[1
]}

Gundogdu, Mustafa ^{[2
]}

机构：

[1] Recep Tayyip Erdogan Univ, Dept Prosthodont, Fac Dent, Rize, Turkey

[2] Ataturk Univ, Dept Prosthodont, Fac Dent, Erzurum, Turkey

来源：

DENTAL MATERIALS JOURNAL | 2016年 / 35卷 / 05期

关键词：

Dental materials; XRD; Vickers hardness test; MECHANICAL-PROPERTIES; DENTAL ZIRCONIA; FRACTURE-TOUGHNESS; FEMORAL HEADS; SURFACE; STRENGTH; EXPOSURE;

D O I：

10.4012/dmj.2015-429

中图分类号：

R78 [口腔科学];

学科分类号：

1003 ;

摘要：

The aim of study was to evaluate the effects of multiple firings on the microstructures of zirconia and two ceramics. Vita VM9 (VMZ) and Cerabien ZR (C-Z) ceramics on a zirconia framework and zirconia without veneering ceramic (WO-Z) were evaluated. Firing methods included firing two, five, and ten times (n=10). The effects of multiple firings on the surface hardness of the materials were evaluated using a Vickers hardness (HV) tester. Data were analyzed by two-way ANOVA and Tukey's test (a=0.05). After firing five and ten times, the hardness of VM-Z and C-Z increased significantly (p<0.001). The HVs of the Cerabien ZR and Vita VM9 veneering ceramics were similar (p>0.05). In the XRD analysis, zirconia had similar tetragonal (t)-monoclinic (m) phase transformations of Y-TZP after the different firing times. Clinically, multiple firings did not affect the microstructure of zirconia, but the structures of the two ceramics were affected.

引用

页码：776 / 781

页数：6

共 31 条

[1] Influence of Low-Temperature Environmental Exposure on the Mechanical Properties and Structural Stability of Dental Zirconia [J].