Effect of high-speed sintering on the flexural strength of hydrothermal and thermo-mechanically aged zirconia materials
| Autor: | Marlis Eichberger, Axel Reichert, Bogna Stawarczyk, Felicitas Wiedenmann, Eva Jerman |
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| Rok vydání: | 2019 |
| Předmět: |
Ceramics
Materials science Surface Properties Sintering 030206 dentistry 02 engineering and technology 021001 nanoscience & nanotechnology Artificial aging Hydrothermal circulation Time efficient Autoclave 03 medical and health sciences Dental Materials 0302 clinical medicine Flexural strength Mechanics of Materials Flexural Strength Materials Testing General Materials Science Cubic zirconia Yttrium Zirconium Composite material 0210 nano-technology General Dentistry |
| Zdroj: | Dental materials : official publication of the Academy of Dental Materials. 36(9) |
| ISSN: | 1879-0097 |
| Popis: | To investigate the influence of high-speed and conventional sintering on the flexural strength (FS) of three zirconia materials initial and after artificial aging.Milled zirconia specimens (3Y-TZP: ZI and Zolid; 4Y-TZP: Zolid HT+; Amann Girrbach AG; N = 288, n = 96/group) were sintered in a high-speed sintering protocol (final temperature 1580 °C, n = 48/subgroup) or a conventional sintering protocol (control group, final temperature 1450 °C, n = 48/subgroup). FS was tested initially and after artificial aging (10 h in an autoclave or 1,200,000 chewing cycles; n = 16/subgroup). Univariate ANOVAs, post-hoc Scheffé, partial eta-squared, Kolmogorov-Smirnov-, Kruskal-Wallis- and Mann-Whitney-U-test were performed (p0.05).ZI showed the highest and HT+ the lowest FS, regardless of the sintering protocols and aging regimens (p0.001). High-speed sintered HT+ showed higher initial FS than the control group (p0.001). ZI (p0.001-0.004) and Zolid (p0.001-0.007) showed higher FS after thermo-mechanical aging. High-speed sintered HT+ showed higher FS in the initial stage (p0.001). The Weibull modulus of the three thermo-mechanically aged materials was negatively influenced by high-speed sintering.As shorter sintering times represent a cost and time efficient alternative, high-speed sintering is a valid alternative to conventional sintering protocols. |
| Databáze: | OpenAIRE |
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