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Please use this identifier to cite or link to this item: http://hdl.handle.net/1843/44675
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dc.creatorMaicon Seboldpt_BR
dc.creatorCarolina Bosso Andrépt_BR
dc.creatorFabio Dupart Nascimentopt_BR
dc.creatorGlaucia Maria Bovi Ambrosanopt_BR
dc.creatorMarcelo Gianninipt_BR
dc.date.accessioned2022-08-29T18:16:25Z-
dc.date.available2022-08-29T18:16:25Z-
dc.date.issued2017-09-
dc.citation.volume77pt_BR
dc.citation.spage157pt_BR
dc.citation.epage163pt_BR
dc.identifier.doi10.1016/j.ijadhadh.2017.05.006pt_BR
dc.identifier.issn01437496pt_BR
dc.identifier.urihttp://hdl.handle.net/1843/44675-
dc.description.resumoThis study evaluated dentin bond strength and dentin-resin interfacial morphology using phosphoric acid-etching and EDTA-conditioning. The occlusal enamel of twenty-four human third molars was removed to expose the dentin surfaces, which were polished with a SiC paper (600 grit). Teeth were randomly divided into three groups (n = 8): etching with 37% phosphoric acid (15 s), conditioning with 0.1 M EDTA (60 s) and 0.5 M EDTA (120 s). Adhesive (XP Bond, Dentsply) was applied and three layers (2 mm each) of composite (EsthetX, Dentsply) were placed and light-activated separately (20 s). Teeth were sectioned to obtain specimens for the microtensile bond strength test (1 mm2 at cross section). Half of the specimens was tested in a universal testing machine (EZ Test, Shimadzu) after 24 h and the other half after storage for 10 months. Failure mode and adhesive interface were analyzed using scanning electron microscopy. Data were analyzed by mixed models for repeated measures (PROC MIXED) and Tukey-Kramer test, considering a significance level of 5%. Mean bond strength values (SD) after 24 h and 10 months were, respectively (in MPa): phosphoric acid: 37.3 (7.7) / 33.9 (6.7); 0.1 M EDTA: 14.7 (7.3) / 15.1 (10.1); 0.5 M EDTA: 25.1 (7.7) / 21.1 (14.1). Dentin treatment with EDTA and phosphoric acid resulted in hybrid layer and resin tags formation. Mixed failures were prevalent for all groups tested after 24 h. Storage for 10 months changed the failure mode for the 0.5 M EDTA group to adhesive failure (between dentin and bonding agent). EDTA applied for 60 s yielded lower bond strength results compared to phosphoric acid and EDTA (120 s), but there was no significant reduction after 10 months of storage for any of the tested groupspt_BR
dc.description.sponsorshipCNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológicopt_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.ispartofInternational Journal of Adhesion and Adhesivespt_BR
dc.rightsAcesso Restritopt_BR
dc.subjectDentinpt_BR
dc.subjectDental acid etchingpt_BR
dc.subjectEDTApt_BR
dc.subjectBond strengthpt_BR
dc.subject.otherEdetic acidpt_BR
dc.subject.otherPhosphinespt_BR
dc.subject.otherDentin-bonding agentspt_BR
dc.subject.otherDentinpt_BR
dc.titleBond strength and adhesive interface analysis using EDTA as a dentin conditionerpt_BR
dc.typeArtigo de Periódicopt_BR
dc.url.externahttps://www.sciencedirect.com/science/article/pii/S0143749617301008pt_BR
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