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http://hdl.handle.net/1843/55974| Type: | Artigo de Periódico |
| Title: | Effect of surface treatments with acid solutions on the surface roughness of an yttrium-tetragonal zirconia polycrystal' |
| Authors: | Frederico dos Reis Goyatá Yvna Fernandes de Souza Galvão Thamyryz Rafaela Simões Luís Felipe Goyatá José Alcides Arruda Amália Moreno |
| Abstract: | Background: The purpose of this in vitro study was to evaluate the effect of conventional surface treatment with acid solutions on the surface roughness of a zirconia-based ceramic. Material and methods: Specimens of yttrium-tetragonal zirconia polycrystal (Y-TZP) -based ceramic were fabricated (5.0 x 5.0 x 2.0 mm, n=40). The specimens were submitted to the tested surface treatment method and divided into 4 groups (n=10): no treatment-control (GI), airborne 110 µm aluminum oxide particle abrasion for 1 minute-conventional method (GII); etching with 48% hydrofluoric acid for 2 minutes (GIII), and nitric acid/hydrofluoric acid etching for 2 minutes (GIV). The surface roughness (Ra) test was performed, followed by AFM analysis. The results were analyzed by ANOVA and the Tukey test, with the level of significance set at a=.05. Results: The surface treatment with acid solutions (0.16 ± 0.02-GIII; 0.11 ± 0.01-GIV) promoted a significant increase in roughness, with higher mean Ra values of Y-TZP (μm) compared to control (0.06 ± 0.01-GI) (p >.05), and lower values compared to the conventional method (0.21 ± 0.06-GII). The aluminum oxide particle treatment resulted in deep microretentions forming sharp Y-TZP peaks compared to only microretentions with acid solution treatments. Conclusions: All Y-TZP treatments effectively promoted microretention in the ceramic. Hydrofluoric acid (48%) proved to be more effective in increasing the Ra of Y-TZP than the nitric acid/hydrofluoric acid treatment. Atomic force microscopy images revealed that both acid solutions modified the surface of the Y-TZP in a uniform manner |
| Subject: | Hydrofluoric acid Nitric acid Microscopy, atomic force Aluminum Oxide |
| language: | eng |
| metadata.dc.publisher.country: | Brasil |
| Publisher: | Universidade Federal de Minas Gerais |
| Publisher Initials: | UFMG |
| metadata.dc.publisher.department: | FAO - DEPARTAMENTO DE CLÍNICA |
| Rights: | Acesso Aberto |
| URI: | http://hdl.handle.net/1843/55974 |
| Issue Date: | 1-Apr-2018 |
| metadata.dc.url.externa: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5937956/ |
| metadata.dc.relation.ispartof: | The Journal of Clinical Dentistry |
| Appears in Collections: | Artigo de Periódico |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| Effect of surface treatments with acid solutions on the surface roughness of an yttrium-tetragonal zirconia polycrystal'.pdf | 618.54 kB | Adobe PDF | View/Open |
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