The effect of carbamide peroxide bleaching agents on the microhardness of dental ceramics.

dc.contributor.authorPassos, Sheila P
dc.contributor.authorVanderlei, Aleska D
dc.contributor.authorSalazar-Marocho, Susana M
dc.contributor.authorAzevedo, Sarina M B
dc.contributor.authorVasquez, Vanessa Z C
dc.contributor.authorKimpara, Estevão Tomomitsu [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-27T11:25:23Z
dc.date.available2014-05-27T11:25:23Z
dc.date.issued2010-12-01
dc.description.abstractThis study examined the effect of 10% and 16% carbamide peroxide bleaching agents on the surface microhardness of micro-particulate feldspathic ceramics (VM7 and VM13, Vita Zahnfabrik). Forty specimens (8-mm diameter, 2-mm thickness) were divided into four groups (n=10): GI-VM7 + 10% Whiteness, G2-VM7 + 16% Whiteness, G3-VM13 + 10% and G4-VM13 + 16% Whiteness. The home-use bleaching agents were applied for 8 hours on 15 days, and the specimens were stored in distilled water at 37 degrees C. The Vickers hardness number (HV) was determined for each specimen. Data were analyzed by the Wilcoxon and Mann-Whitney tests (p < 0.05). The microhardness values before exposure were: g1-433 (57); g2-486 (22); g3-509 (28); g4-518 (24), and after exposure: G1-349 (32); G2-496 (95); G3-519 (38); G4-502 (81). G2 exhibited a higher and significant difference than GI in VM7 groups, and the effect of bleaching concentration was shown to be significant by the Mann-Whitney test. And for VM13, both the Wilcoxon and Mann-Whitney tests showed no significant differences. When using 10% carbamide peroxide, the microhardness of VM7 ceramic was affected, and there were no effect on the microhardness between VM7 and VM13 ceramics when 16% carbamide peroxide was used.en
dc.format.extent79-83
dc.identifierhttp://www.actaodontologicalat.com/archivo/v23n2/fulltext/articulo1.pdf
dc.identifier.citationActa odontológica latinoamericana : AOL, v. 23, n. 2, p. 79-83, 2010.
dc.identifier.issn0326-4815
dc.identifier.lattes0967916388665754
dc.identifier.orcid0000-0003-0586-4644
dc.identifier.scopus2-s2.0-79952112891
dc.identifier.urihttp://hdl.handle.net/11449/72145
dc.language.isoeng
dc.relation.ispartofActa Odontológica Latinoamericana (AOL)
dc.relation.ispartofsjr0,264
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectbiomedical and dental materials
dc.subjectdrug derivative
dc.subjectperoxide
dc.subjecttooth bleaching agent
dc.subjecturea
dc.subjecturea peroxide
dc.subjectceramics
dc.subjectdrug effect
dc.subjecthardness
dc.subjectCeramics
dc.subjectDental Materials
dc.subjectHardness
dc.subjectHardness Tests
dc.subjectPeroxides
dc.subjectTooth Bleaching Agents
dc.subjectUrea
dc.titleThe effect of carbamide peroxide bleaching agents on the microhardness of dental ceramics.en
dc.typeArtigo
dcterms.licensehttp://www.actaodontologicalat.com/peditorial.html
unesp.author.lattes0967916388665754[6]
unesp.author.orcid0000-0003-0586-4644[6]
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Ciência e Tecnologia, São José dos Campospt

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