Effect of different surface treatments on In-Ceram Alumina roughness. An AFM study |
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| Authors: | Estrella Osorio Manuel Toledano Bruno Lopes da Silveira Raquel Osorio |
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| Affiliation: | 1. Department of Restorative Dentistry, School of Dentistry, Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, Brazil;2. Department of Dental Materials, School of Dentistry, Colegio Máximo de Cartuja, University of Granada, 18071 Granada, Spain |
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| Abstract: | ObjectivesThe aim of this study was to evaluate the influence of different treatments on the surface roughness of In-Ceram Alumina (VITA, Säckingen, Germany).MethodsThe ceramic blocks were polished (4000 grit) and sandblasted (SB) with airborne particle abrasion Al2O3; 110 μm particle size; 2.8 bar; 20 s. The following treatments were performed: (1) no treatment; (2) Rocatec System (RC): after SB treatment, sandblasting with silica powder; 30 μm particle size; 2.8 bar; 20 s. (3) Neodymium:yttrium–aluminium–garnet (Nd:YAG) laser (ND) application of graphite powder (stain) on the ceramic surface and Nd:YAG laser irradiation (distance: 1 mm, 100 mJ, 20 Hz, 2 W, and 141.54 J/cm2). (4) Nd:YAG laser plus Rocatec System: after ND treatments, RC was applied. Digital images (20 μm × 20 μm) from the surfaces were obtained by means of an AFM microscope in taping mode (Nanoscope IIIa, Digital Instruments). Roughness was measured in 10 μm × 10 μm boxes. Roughness (Ra) data (nm) were analyzed by one-way ANOVA (p < 0.05).ResultsNo differences in ceramic surfaces roughness occurred after any of the tested treatments (p = 0.54).ConclusionsHigh-alumina ceramic surface roughness was not increased with any of the tested treatments. |
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| Keywords: | Ceramic Alumina Sandblasting Rocatec Roughness AFM Surfaces treatments Silica coating Nd:YAG laser Abrasion |
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