Heat treatment-improved bond strength of resin cement to lithium disilicate dental glass-ceramic

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dc.contributor.authorSundfeld, Daniel
dc.contributor.authorCorrer-Sobrinho, Lourenço
dc.contributor.authorPini, Núbia Inocêncya Pavesi
dc.contributor.authorCosta, Ana Rosa
dc.contributor.authorSundfeld, Renato Herman [UNESP]
dc.contributor.authorPfeifer, Carmem Silvia
dc.contributor.authorMartins, Luis Roberto Marcondes
dc.contributor.institutionUniversidade Estadual de Campinas (UNICAMP)
dc.contributor.institutionOregon Health and Science University - OHSU
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2018-12-11T17:28:56Z
dc.date.available2018-12-11T17:28:56Z
dc.date.issued2016-06-01
dc.description.abstractThis study investigated the influence of different hydrofluoric acid (HF) concentrations and heat treatments applied to a lithium disilicate dental glass-ceramic (EMX) on surface morphology and micro-shear bond strength (μSBS) to resin cement. Five HF concentrations (1%, 2.5%, 5%, 7.5% and 10%) and four different heat treatments applied before etching were assessed: 1. etching at room temperature with no previous heat treatment (control group); 2. HF stored at 70 °C for 1 min applied to the ceramic surface at room temperature; 3. HF at room temperature applied after a hot air stream is applied perpendicularly to the ceramic surface for 1 min; 4. The combination of previously heated HF and heated EMX surface. The etching time was fixed for 20 s for all groups. Etched EMX specimens were analyzed on field-emission scanning electron microscope (FE-SEM) and the μSBS was carried out on a universal testing machine at a crosshead speed of 1 mm/min until fracture. For the control groups, FE-SEM images showed greater glassy matrix dissolution and higher μSBS for 7.5% and 10% HF concentrations. The previous heat treatments enhanced the glassy matrix dissolution more evidently for 1%, 2.5% and 5% and yielded increased μSBS values, which were not statistically different for 7.5% and 10% HF concentrations (control group). HF concentrations and previous heat treatments did show to have an influence on the etching/bonding characteristics to lithium disilicate dental glass-ceramic.en
dc.description.affiliationDepartment of Restorative Dentistry Piracicaba Dental School University of Campinas UNICAMP
dc.description.affiliationDepartment of Restorative Dentistry Division of Biomaterials and Biomechanics Oregon Health and Science University - OHSU
dc.description.affiliationDepartment of Restorative Dentistry Dental Materials Division Piracicaba Dental School University of Campinas - UNICAMP
dc.description.affiliationDepartment of Restorative Dentistry Araçatuba Dental School State University of São Paulo UNESP
dc.description.affiliationUnespDepartment of Restorative Dentistry Araçatuba Dental School State University of São Paulo UNESP
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.format.extent10071-10078
dc.identifierhttp://dx.doi.org/10.1016/j.ceramint.2016.03.112
dc.identifier.citationCeramics International, v. 42, n. 8, p. 10071-10078, 2016.
dc.identifier.doi10.1016/j.ceramint.2016.03.112
dc.identifier.file2-s2.0-84977962715.pdf
dc.identifier.issn0272-8842
dc.identifier.scopus2-s2.0-84977962715
dc.identifier.urihttp://hdl.handle.net/11449/178136
dc.language.isoeng
dc.relation.ispartofCeramics International
dc.relation.ispartofsjr0,784
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectB. Electron microscopy
dc.subjectB. Surfaces
dc.subjectC. Strength
dc.subjectD. Glass ceramics
dc.subjectE. Biomedical applications
dc.titleHeat treatment-improved bond strength of resin cement to lithium disilicate dental glass-ceramicen
dc.typeArtigo

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Artigos - Odontologia Restauradora - FOA