Please use this identifier to cite or link to this item: https://repositorio.ufrn.br/handle/123456789/22989
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dc.contributor.authorQueiroz, José Renato Cavalcanti-
dc.contributor.authorBotelho, Marco Antonio-
dc.contributor.authorSousa, Samira Albuquerque de-
dc.contributor.authorMartinelli, Antonio Eduardo-
dc.contributor.authorOzcan, Mutlu-
dc.date.accessioned2017-05-16T13:20:40Z-
dc.date.available2017-05-16T13:20:40Z-
dc.date.issued2015-
dc.identifier.citationQUEIROZ, J. R. C. et al. Evaluation of spatial and functional roughness parameters on air-abraded zirconia as a function of particle type and deposition pressure. Journal of Adhesive Dentistry, v. 17, n. 1 p. 77-80, 2015.pt_BR
dc.identifier.issn1461-5185-
dc.identifier.urihttps://repositorio.ufrn.br/jspui/handle/123456789/22989-
dc.languageengpt_BR
dc.rightsAcesso Abertopt_BR
dc.subjectAdhesionpt_BR
dc.subjectCeramicpt_BR
dc.subjectProsthodonticspt_BR
dc.subjectSurface treatmentpt_BR
dc.subjectRoughnesspt_BR
dc.subjectZirconiapt_BR
dc.titleEvaluation of spatial and functional roughness parameters on air-abraded zirconia as a function of particle type and deposition pressurept_BR
dc.typearticlept_BR
dc.description.resumoPurpose: This study evaluated the spatial and functional roughness parameters on air-abraded zirconia as a function of particle type and deposition pressure. Materials and Methods: Polished zirconia blocks (Cercon, Degussa/Dentsply) (N=30) with dimensions of 5 × 4 × 4 mm3 were air abraded according to 2 factors: a) particle type – 30-μm silica-coated alumina (CoJet) or alumina particles (45 μm); b) deposition pressure (1.5, 2.5 and 4.5 bar). Roughness parameters (Sdr, Vi, Sci and Svi) were measured in an optical profilometer (Wyko NT 1100) at the center of the air-abraded area (301.3 × 229.2 μm). Two measurements were made for each parameter from each surface. The means of each group were analyzed by 2-way ANOVA followed by Tukey’s adjustment test and Student’s t-test (alpha = 0.05). Results: Both the particle type (p < 0.05) and deposition pressure (p < 0.05) significantly affected the roughness parameters. Interaction terms were significant except for Sci and Svi. With the increase in pressure from 1.5 to 4.5 bar, Sdr (CoJet 1.5: 15.7 ± 0.2; CoJet 4.5: 26.6 ± 0.2; alumina 1.5: 14.7 ± 0.2; alumina 4.5:24.4 ± 0.2) and Vi (CoJet 1.5: 0.66 ± 0.01; CoJet 4.5: 1.37 ± 0.07; alumina 1.5: 0.62 ± 0.02; alumina 4.5:1.19 ± 0.02) parameters showed a significant increase with both alumina and CoJet particles. Mean Sci values (CoJet 1.5: 1.62 ± 0.01, CoJet 4.5: 1.49 ± 0.02; alumina 1.5: 1.6 ± 0.03; alumina 4.5: 1.42 ± 0.04) and SVi (CoJet 1.5: 0.98 ± 0.01, CoJet 4.5: 0.112 ± 0.01; alumina 1.5: 0.98 ± 0.01, alumina 4.5: 0.12 ± 0.01) decreased significantly (p < 0.05) with the increase in pressure from 1.5 to 4.5 bar. The pressure increase from 2.5 to 4.5 bar did not cause any significant difference (p > 0.05) in these parameters for either particle type. Conclusion: Considering roughness parameters for micromechanical retention and parameters for adsorption mechanisms of adhesion, zirconia surfaces presented better morphological features when air abraded with silica-coated alumina than alumina particles at pressures higher than 1.5 bar. Particle deposition at 2.5 bar may be preferable to 4.5 bar pressure for avoiding possible deposition-related damage on zirconia, as there were no significant differences for the functional parameters.pt_BR
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CT - DEMAT - Artigos publicados em periódicos

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