Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/348305
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dc.contributor.CRUESPUNIVERSIDADE ESTADUAL DE CAMPINASpt_BR
dc.contributor.authorunicampAzevedo, Caio Lucidius Naberezny-
dc.typeArtigopt_BR
dc.titleBisGMA/TEGDMA ratio and filler content effects on shrinkage stresspt_BR
dc.contributor.authorGonçalves, Flávia-
dc.contributor.authorAzevedo, Caio L. N.-
dc.contributor.authorFerracane, Jack L.-
dc.contributor.authorBraga, Roberto R.-
dc.subjectCompostos inorgânicospt_BR
dc.subject.otherlanguageInorganic chemicalspt_BR
dc.description.abstractTo investigate the contributions of BisGMA:TEGDMA and filler content on polymerization stress, along with the influence of variables associated with stress development, namely, degree of conversion, reaction rate, shrinkage, elastic modulus and loss tangent for a series of experimental dental composites. Methods Twenty formulations with BisGMA:TEGDMA ratios of 3:7, 4:6, 5:5, 6:4 and 7:3 and barium glass filler levels of 40, 50, 60 or 70 wt% were studied. Polymerization stress was determined in a tensilometer, inserting the composite between acrylic rods fixed to clamps of a universal test machine and dividing the maximum load recorded by the rods cross-sectional area. Conversion and reaction rate were determined by infra-red spectroscopy. Shrinkage was measured by mercury dilatometer. Modulus was obtained by three-point bending. Loss tangent was determined by dynamic nanoindentation. Regression analyses were performed to estimate the effect of organic and inorganic contents on each studied variable, while a stepwise forward regression identified significant variables for polymerization stress. Results All variables showed dependence on inorganic concentration and monomeric content. The resin matrix showed a stronger influence on polymerization stress, conversion and reaction rate, whereas filler fraction showed a stronger influence on shrinkage, modulus and loss tangent. Shrinkage and conversion were significantly related to polymerization stress. Significance Both the inorganic filler concentration and monomeric content affect polymerization stress, but the stronger influence of the resin matrix suggests that it may be possible to reduce stress by modifying resin composition without sacrificing filler content. The main challenge is to develop formulations with low shrinkage without sacrificing degree of conversionpt_BR
dc.relation.ispartofDental materialspt_BR
dc.relation.ispartofabbreviationDent materpt_BR
dc.publisher.cityKidlintonpt_BR
dc.publisher.countryReino Unidopt_BR
dc.publisherElsevierpt_BR
dc.date.issued2011-
dc.date.monthofcirculationJunept_BR
dc.language.isoengpt_BR
dc.description.volume27pt_BR
dc.description.issuenumber6pt_BR
dc.description.firstpage520pt_BR
dc.description.lastpage526pt_BR
dc.rightsFechadopt_BR
dc.sourceWOSpt_BR
dc.identifier.issn0109-5641pt_BR
dc.identifier.eissn1879-0097pt_BR
dc.identifier.doi10.1016/j.dental.2011.01.007pt_BR
dc.identifier.urlhttps://www.sciencedirect.com/science/article/pii/S0109564111000212pt_BR
dc.description.sponsorshipCOORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIOR - CAPESpt_BR
dc.description.sponsorshipFUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESPpt_BR
dc.description.sponsordocumentnumberPDEE 3283-08-9pt_BR
dc.description.sponsordocumentnumber07/55476-9pt_BR
dc.date.available2020-08-28T20:07:53Z-
dc.date.accessioned2020-08-28T20:07:53Z-
dc.description.provenanceSubmitted by Thais de Brito Barroso (tbrito@unicamp.br) on 2020-08-28T20:07:53Z No. of bitstreams: 0. Added 1 bitstream(s) on 2021-01-04T15:14:37Z : No. of bitstreams: 1 000290021400004.pdf: 318831 bytes, checksum: 1e13466a4775f7adeb60c7fdd8be3b16 (MD5)en
dc.description.provenanceMade available in DSpace on 2020-08-28T20:07:53Z (GMT). No. of bitstreams: 0 Previous issue date: 2011en
dc.identifier.urihttp://repositorio.unicamp.br/jspui/handle/REPOSIP/348305-
dc.contributor.departmentDepartamento de Estatísticapt_BR
dc.contributor.unidadeInstituto de Matemática, Estatística e Computação Científicapt_BR
dc.subject.keywordResin compositespt_BR
dc.subject.keywordOrganic matrixpt_BR
dc.subject.keywordInorganic contentpt_BR
dc.subject.keywordPolymerization stresspt_BR
dc.subject.keywordMechanical propertiespt_BR
dc.identifier.source000290021400004pt_BR
dc.creator.orcid0000-0001-9535-292Xpt_BR
dc.type.formArtigopt_BR
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