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Please use this identifier to cite or link to this item: http://hdl.handle.net/1843/52286
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dc.creatorHenrico Badaouistrazzi-Sahyonpt_BR
dc.creatorThaís Yumi Umeda Suzukipt_BR
dc.creatorGlívia Queiroz Limapt_BR
dc.creatorJuliana Aparecida Delbenpt_BR
dc.creatorBruno Mena Cadorinpt_BR
dc.creatorVanessa do Nascimentopt_BR
dc.creatorSimone Duartept_BR
dc.creatorPaulo Henrique dos Santospt_BR
dc.date.accessioned2023-04-19T20:46:13Z-
dc.date.available2023-04-19T20:46:13Z-
dc.date.issued2021-11-
dc.citation.volume123pt_BR
dc.citation.spage01pt_BR
dc.citation.epage10pt_BR
dc.identifier.doihttps://doi.org/10.1016/j.jmbbm.2021.104762pt_BR
dc.identifier.issn18780180pt_BR
dc.identifier.urihttp://hdl.handle.net/1843/52286-
dc.description.resumoPurpose Studies evaluating different features of cold plasma action on dentin surface characteristics are lacking. Thus, this in vitro study aimed to determine the effect of cold plasma under different protocols of exposure time, distance to plasma source, and the association of argon gas with distinct concentrations of oxygen on the wettability, surface energy, total free interaction energy, surface roughness, morphology and chemical composition of dentin. Material and methods One hundred and twenty-five bovine dentin samples were used and divided into twenty-five groups according to the exposure time to plasma (15, 30, or 60 s); distance between plasma source and dentin surface (3 or 6 mm); argon gas without plasma generation; and plasma generated by argon gas and association of argon gas with distinct concentrations of oxygen (2 % or 3 %) (n = 5). Contact angle (θ), surface energy (γs) and total free interaction energy (ΔG) were measured using a goniometer (Krüss), while surface roughness (Ra) was evaluated by a profilometer (Mitutoyo). Representative samples were submitted to scanning electron microscopy (JEOL) to ilustrate the morphology and chemical composition of dentin. Data comparing control group with all experimental groups were submitted to ANOVA followed by Tukey's test (α = .05). Data comparing oxygen gas action at different concentrations and argon gas on dentin characteristics were submitted to non-parametric Kruskal–Wallis test, followed by Dunn test for comparison between the groups and methods (α = 0.05). Results In general, argon gas without plasma generation promoted no significant difference on dentin surface characteristics compared to control group (P > .05), differently for the cold plasma that significantly reduced contact angle values and increased total free interaction energy of dentin surface (P < .05). Overall, feeding of oxygen at distinct concentrations promoted significant difference on dentin surface characteristics compared to control group (P < .05). Exposure time and distance protocols interfered with contact angle, surface energy and total free interaction energy analyses for each gas. There was no significant difference on surface roughness (P > .05), morphology and chemical composition of dentin submitted to argon gas, cold plasma, and distinct concentrations of oxygen. Conclusion In conclusion, plasma generated by argon gas and its feeding with 2 % and 3 % oxygen gas improved the dentin surface characteristics about wettability, surface energy and total free interaction energy. Such treatments preserved the surface roughness, morphology and chemical composition of dentin. The protocols of groups Ar-6mm-15sec, ArO2-3mm-30sec and ArO3-3mm-15sec are recommended for improvement of dentin surface characteristicspt_BR
dc.format.mimetypepdfpt_BR
dc.languageengpt_BR
dc.publisherUniversidade Federal de Minas Geraispt_BR
dc.publisher.countryBrasilpt_BR
dc.publisher.departmentFAO - DEPARTAMENTO DE ODONTOLOGIA RESTAURADORApt_BR
dc.publisher.initialsUFMGpt_BR
dc.relation.ispartofJournal of the Mechanical Behavior of Biomedical Materialspt_BR
dc.rightsAcesso Restritopt_BR
dc.subject.otherArgonpt_BR
dc.subject.otherOxygenpt_BR
dc.subject.otherPlasmapt_BR
dc.subject.otherSurface propertiespt_BR
dc.subject.otherWettabilitypt_BR
dc.subject.otherDentinpt_BR
dc.subject.otherMicroscopy electron scanningpt_BR
dc.titleIn vitro study on how cold plasma affects dentin surface characteristicspt_BR
dc.typeArtigo de Periódicopt_BR
dc.url.externahttps://www.sciencedirect.com/science/article/pii/S1751616121004057#:~:text=In%20conclusion%2C%20plasma%20generated%20by,and%20chemical%20composition%20of%20dentin.pt_BR
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