The mechanical behavior of high-translucent monolithic zirconia after adjustment and finishing procedures and artificial aging
| Autor: | Gelson Luis Adabo, Gabriel Rodrigues Hatanaka, Gabriela Scatimburgo Polli |
|---|---|
| Přispěvatelé: | Universidade Estadual Paulista (Unesp) |
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Surface Properties Polishing Diamond Reproducibility of Results 030206 dentistry Surface finish engineering.material Grinding Dental Polishing 03 medical and health sciences Glazing 0302 clinical medicine Flexural strength Materials Testing engineering Humans Cubic zirconia Profilometer Zirconium Oral Surgery Composite material |
| Zdroj: | Scopus Repositório Institucional da UNESP Universidade Estadual Paulista (UNESP) instacron:UNESP |
| ISSN: | 1097-6841 |
| Popis: | Made available in DSpace on 2019-10-06T17:09:05Z (GMT). No. of bitstreams: 0 Previous issue date: 2019-01-01 Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Statement of problem: How occlusal adjustments and finishing of high-translucent monolithic zirconia restorations affect their mechanical behavior is unclear. Purpose: The purpose of this in vitro study was to investigate the effect of grinding, finishing, and hydrothermal degradation on the roughness, flexural strength, and reliability of fully stabilized zirconia (FSZ)and partially stabilized zirconia (PSZ)for monolithic restorations. Material and methods: Specimens of PSZ and FSZ were divided into 5 groups: control (Ctrl); those ground by using coarse diamond rotary instrument (Gr); those that underwent grinding, polishing (diamond rubber), and glazing (GrPolGl); those that underwent grinding and glazing (GrGl); and those that underwent grinding and polishing (GrPol). These groups were subdivided into nonaged and hydrothermally aged in autoclave (134 °C, 200 kPa). Three-point bend tests (flexural strength [FS])were performed (n=30), and roughness (Ra)was measured by using a contact profilometer (n=30). The Weibull moduli were obtained from the FS data. The intergroup FS was analyzed by the Kruskal-Wallis test and Student-Newman-Keuls method, and the intragroup FS, Mann-Whitney tests (α=.05). Results: The median FS for PSZ (MPa)for the aforementioned groups is as follows: Gr (1147.8)=GrPol (1210.3)>GrPolGl (815.6)>GrGl (569.7)=Ctrl (583.0). The FS for FSZ (MPa)for the aforementioned groups is as follows: GrPolGl (404.2)=GrGl (427.0) |
| Databáze: | OpenAIRE |
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