Mechanical properties of three kinds of zirconia ceramics under chairside rapid sintering

doi:10.3969/j.issn.2095-4344.1555

Abstract

Abstract:

BACKGROUND: As an emerging technology, chairside rapid sintering only makes sure that individual zirconia can achieve perfect performance, but there is no report on whether it is applicable for the other zirconia ceramics.

OBJECTIVE: To explore the effect of chairside rapid sintering on the mechanical properties of three kinds of zirconia ceramics.

METHODS: Standard specimens of TT, ST and inCoris ZI zirconia undertook chairside rapid sintering. The density, hardness, fracture toughness and biaxial bending strength were measured.

RESULTS AND CONCLUSION: The density value of TT, ST and inCoris ZI after sintering was (5.966±0.001), (6.060±0.001), and (6.031±0.001) g/cm³, respectively, and there were significant differences between groups (P < 0.05). The Vickers hardness of TT, ST and inCoris ZI after sintering was (12.02±0.04), (12.90±0.05) and (12.54±0.09) GPa, respectively, and significant differences appeared between groups (P < 0.05). The fracture toughness of TT, ST, and inCoris ZI after sintering was (4.87±0.07), (6.17±0.10), and (6.42±0.08) MPa·m^1/2,respectively, and there were significant differences between groups (P < 0.05). The biaxial bending strength of TT, ST, and inCoris ZI after sintering was (624.41±92.01), (966.01±58.86), and (1 154.83±49.79) MPa, respectively. The biaxial bending strength of TT was significantly lower than that of ST and inCoris ZI (P < 0.05), but there was no significant difference between ST and inCoris ZI (P > 0.05). Therefore, the mechanical properties of ST and inCoris ZI under chairside rapid sintering can meet the clinical requirements, while TT needs to meet proper clinical indications.

中国组织工程研究杂志出版内容重点：生物材料；骨生物材料; 口腔生物材料; 纳米材料; 缓释材料; 材料相容性；组织工程

Key words: Dental Porcelain, Hardness, Tissue Engineering

CLC Number:

R459.9

R318.08

Wang Qiuyue, Feng Yuchi . Mechanical properties of three kinds of zirconia ceramics under chairside rapid sintering[J]. Chinese Journal of Tissue Engineering Research, 2019, 23(6): 877-882.

Figures/Tables 8

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