The effect of different aging protocols on the flexural strength and phase transformations of two monolithic zirconia ceramics
| Autor: | Maria Kelesi, Eleana Kontonasaki, Nikolaos Kantiranis, Lambrini Papadopoulou, Triantafyllia Zorba, K M Paraskevopoulos, Petros Koidis |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | Journal of Applied Biomaterials & Functional Materials, Vol 18 (2020) |
| Druh dokumentu: | article |
| ISSN: | 2280-8000 22808000 |
| DOI: | 10.1177/2280800020982677 |
| Popis: | Introduction: The aim of the present study was to investigate how different aging protocols can affect the flexural strength and phase transformations of yttrium-stabilized zirconia ceramics (Y-TZP) for monolithic restorations. Materials and methods: Bar-shaped specimens from two zirconia ceramics bars were divided into three groups: a. no treatment (c), b. aging in an autoclave (a), and c. thermal cycling (t). The flexural strength was determined by the 3-point bending test and statistical analysis was performed to determine significant differences ( p < 0.05). Weibull statistics was used to analyze the dispersion of strength values while surface microstructural analysis was performed through X-ray diffraction analysis (XRD), Fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM). Results: Aging did not significantly affect the flexural strength but differences were recorded between the two groups, with group A presenting higher strength values and m-phase percentages. Conclusions: The observed differences between the two ceramics could be attributed to variations in composition and processing. |
| Databáze: | Directory of Open Access Journals |
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