Evaluation of dentin desensitization protocols on the dentinal surface and their effects on the dentin bond interface

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dc.contributor.authorEscalante-Otárola, Wilfredo Gustavo [UNESP]
dc.contributor.authorCastro-Núñez, Gabriela Mariana [UNESP]
dc.contributor.authorJordão-Basso, Keren Cristina Fagundes [UNESP]
dc.contributor.authorGuimarães, Bruno Martini
dc.contributor.authorPalma-Dibb, Regina Guenka
dc.contributor.authorKuga, Milton Carlos [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.date.accessioned2018-12-11T17:20:55Z
dc.date.available2018-12-11T17:20:55Z
dc.date.issued2018-08-01
dc.description.abstractObjectives: To evaluate the effect of desensitizing agent containing calcium phosphate nanoparticles on the bond strength of etch-and-rinse adhesive system (Scotchbond Multi-Purpose), presence of precipitate, dentinal tubule obliteration and hybrid layer formation in dentin in comparison with potassium nitrate plus sodium fluoride or strontium chloride compounds. Methods: 150 bovine incisors were treated with (n = 10): G1, Desensibilize Nano P (Ca3(PO4)2+5%KNO3+0.9%NaF); G2, Desensibilize (10%SrCl2+5%KNO3); G3, Desensibilize KF2% (5%KNO3+0.2%NaF); G4, Ultra EZ (3%KNO3+0.25%NaF) and G5, no treated (control). Scanning electron microscopy was used to assess the incidence of precipitates (500×) and obliterated dentinal tubule counts (1.000×). The adhesive system was used after all desensitization treatments. The bond strength (n = 40) and the fracture pattern were evaluated. Confocal laser microscopy was used to quantify the hybrid layer formation in dentin. Results: G1 and G2 presented higher adhesive system bond strength (MPa) than G4 and G5, however no significant differences were observed in comparison with G3. Cohesive fracture was frequently found: G1 (58.5%), G2 (51.3%) and G3 (43.8%). G1 showed the highest incidence of precipitates and the highest number of blocked dentinal tubules. G1 and G2 presented similar hybrid layer formation and the highest hybrid layer formation values. Conclusions: Desensibilize Nano P (G1) favored the bond strength of the adhesive system to dentin, increased the precipitation of residues, obliteration of dentinal tubules, and hybrid layer formation in comparison with other agents. Clinical relevance: Desensitizers promote dentin obliteration, however, may affect dentin bonding.en
dc.description.affiliationRestorative Dentistry Department Araraquara Dental School São Paulo State University (Unesp)
dc.description.affiliationDentistry Endodontic and Dental Materials Department Bauru Dental School São Paulo University
dc.description.affiliationRestorative Dentistry Department Ribeirão Preto Dental School São Paulo University
dc.description.affiliationUnespRestorative Dentistry Department Araraquara Dental School São Paulo State University (Unesp)
dc.format.extent98-104
dc.identifierhttp://dx.doi.org/10.1016/j.jdent.2018.06.002
dc.identifier.citationJournal of Dentistry, v. 75, p. 98-104.
dc.identifier.doi10.1016/j.jdent.2018.06.002
dc.identifier.file2-s2.0-85048721624.pdf
dc.identifier.issn0300-5712
dc.identifier.lattes1627568419811788
dc.identifier.scopus2-s2.0-85048721624
dc.identifier.urihttp://hdl.handle.net/11449/176472
dc.language.isoeng
dc.relation.ispartofJournal of Dentistry
dc.relation.ispartofsjr1,919
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectBond strength
dc.subjectDentin adhesive
dc.subjectDentin hypersensitivity
dc.subjectDesensitizing agents
dc.subjectHybrid layer
dc.subjectScanning electron microscopy
dc.titleEvaluation of dentin desensitization protocols on the dentinal surface and their effects on the dentin bond interfaceen
dc.typeArtigo
unesp.author.lattes1627568419811788
unesp.author.orcid0000-0003-4879-3938[1]
unesp.author.orcid0000-0002-3247-0248[5]
unesp.author.orcid0000-0001-5728-8293[6]

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