Nd:YAG Laser Irradiation of Etched/Unetched Dentin Through an Uncured Two-step Etch-and-Rinse Adhesive and its Effect on Microtensile Bond Strength

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dc.contributor.authorCastro, Fabricio L. A.
dc.contributor.authorAndrade, Marcelo F. [UNESP]
dc.contributor.authorHebling, Josimeri [UNESP]
dc.contributor.authorLizarelli, Rosane F. Z.
dc.contributor.institutionUNIP
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.date.accessioned2014-05-20T13:47:13Z
dc.date.available2014-05-20T13:47:13Z
dc.date.issued2012-04-01
dc.description.abstractPurpose: To evaluate whether Nd:YAG laser irradiation of etched and unetched dentin through an uncured adhesive affected the microtensile bond strength (pTBS).Materials and Methods: Flat dentin surfaces were created in 19 extracted human third molars. Adper Single Bond (SB) adhesive was applied over etched (groups 1 to 3) or unetched dentin (groups 4 to 6). The dentin was then irradiated with a Nd:YAG laser through the uncured adhesive, using 0.75 or 1 W power settings, except for the control groups (groups 1 and 4). The adhesive was light cured and composite crowns were built up. After 24 h, the teeth were sectioned into beams, with cross-sectional areas of 0.49 mm(2), and were stressed under tension. Data were statistically analyzed using two-way ANOVA and Tukey's test (alpha = 5%). Dentin surfaces of fractured specimens and the interfaces of untested beams were observed under scanning electron microscopy (SEM).Results: Acid etching, laser irradiation, and their interaction significantly affected bonding (p < 0.05). Laser irradiation did not improve bonding of etched dentin to resin (p > 0.05). However, higher pTBS means were found on unetched lased dentin (groups 5 and 6), but only in comparison to group 4, where neither lasing nor etching was performed. Groups 4 to 6 showed the lowest pTBS means among all groups tested (p < 0.05). Laser irradiation did not change the characteristics of the hybrid layers created, while solidification globules were observed on lased dentin surfaces under SEM.Conclusion: Laser irradiation of dentin through the uncured adhesive did not significantly improve the pTBS in comparison to the suggested manufacturer's technique.en
dc.description.affiliationUNIP, Sch Dent, Hlth Sci Inst, Goiania, Go, Brazil
dc.description.affiliationUniv Estadual Paulista, Dept Restorat Dent, São Paulo, Brazil
dc.description.affiliationUniv Estadual Paulista, Dept Orthodont & Pediat Dent, São Paulo, Brazil
dc.description.affiliationUniv São Paulo, Inst Phys, São Paulo, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Dept Restorat Dent, São Paulo, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Dept Orthodont & Pediat Dent, São Paulo, Brazil
dc.format.extent137-145
dc.identifierhttp://dx.doi.org/10.3290/j.jad.a21854
dc.identifier.citationJournal of Adhesive Dentistry. Hanover Park: Quintessence Publishing Co Inc, v. 14, n. 2, p. 137-145, 2012.
dc.identifier.doi10.3290/j.jad.a21854
dc.identifier.issn1461-5185
dc.identifier.urihttp://hdl.handle.net/11449/16776
dc.identifier.wosWOS:000303136400006
dc.language.isoeng
dc.publisherQuintessence Publishing Co Inc
dc.relation.ispartofJournal of Adhesive Dentistry
dc.relation.ispartofjcr1.691
dc.relation.ispartofsjr0,839
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjectdentin adhesivesen
dc.subjectlasersen
dc.subjectdentinen
dc.subjecttensile bond strengthen
dc.titleNd:YAG Laser Irradiation of Etched/Unetched Dentin Through an Uncured Two-step Etch-and-Rinse Adhesive and its Effect on Microtensile Bond Strengthen
dc.typeArtigo
dcterms.licensehttp://www.quintpub.com/journals/jad/permissions.php
dcterms.rightsHolderQuintessence Publishing Co Inc
unesp.author.orcid0000-0001-5962-5951[1]
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Odontologia, Araraquarapt

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