Flexural strength of acrylic resins polymerized by different cycles

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dc.contributor.authorBarbosa, Débora de Barros [UNESP]
dc.contributor.authorde Souza, Raphael Freitas
dc.contributor.authorPero, Ana Carolina [UNESP]
dc.contributor.authorMarra, Julie [UNESP]
dc.contributor.authorCompagnoni, Marco Antonio [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.date.accessioned2014-02-26T17:02:28Z
dc.date.accessioned2014-05-20T13:43:29Z
dc.date.available2014-02-26T17:02:28Z
dc.date.available2014-05-20T13:43:29Z
dc.date.issued2007-09-01
dc.description.abstractDespite the large number of studies addressing the effect of microwave polymerization on the properties of acrylic resin, this method has received limited clinical acceptance. This study evaluated the influence of microwave polymerization on the flexural strength of a denture base resin. A conventional heat-polymerized (Classico), a microwave-polymerized (Onda-Cryl) and a autopolymerizing acrylic (Jet) resins were used. Five groups were established, according to polymerization cycles: A, B and C (Onda-Cryl, short cycle - 500W/3 min, long - 90W/13 min + 500W/90 see, and manufacturing microwave cycle - 320W/3 min + OW/3 min + 720W/3 min); T(Classico, water bath cycle - 74 degrees C/9h) and Q (Jet, press chamber cycle - 50 degrees C/15 min at 2 bar). Ten specimens (65 x 10 x 3.3 mm) were prepared for each cycle. The flexural strength of the five groups was measured using a three-point bending test at a cross-head speed of 5 mm/min. Flexural strength values were analyzed by one-way ANOVA and the Tukey's test was performed to identify the groups that were significantly different at 5% level. The microwave-polymerized groups showed the highest means (p<0.05) for flexural strength (MPa) (A = 106.97 +/- 5.31; B = 107.57 +/- 3.99; C = 109.63 +/- 5.19), and there were no significant differences among them. The heat-polymerized group (T) showed the lowest flexural strength means (84.40 +/- 1.68), and differ significantly from all groups. The specimens of a microwavable denture base resin could be polymerized by different microwave cycles without risk of decreasing the flexural strength.en
dc.description.affiliationUNESP, Dent Sch Aracatuba, Dept Dent Mat & Prosthodont, Aracatuba, SP, Brazil
dc.description.affiliationUSP, Dent Sch Ribeirao Preto, Dept Dent Mat & Prosthodont, Ribeirao Preto, SP, Brazil
dc.description.affiliationUnespUNESP, Dent Sch Aracatuba, Dept Dent Mat & Prosthodont, Aracatuba, SP, Brazil
dc.format.extent424-428
dc.identifierhttp://dx.doi.org/10.1590/S1678-77572007000500010
dc.identifier.citationJournal of Applied Oral Science. Bauru-sp: Univ São Paulo Fac Odontologia Bauru, v. 15, n. 5, p. 424-428, 2007.
dc.identifier.doi10.1590/S1678-77572007000500010
dc.identifier.fileWOS000256794600009.pdf
dc.identifier.issn1678-7757
dc.identifier.lattes7601364286525384
dc.identifier.lattes8921196002764597
dc.identifier.scieloS1678-77572007000500010
dc.identifier.urihttp://hdl.handle.net/11449/15176
dc.identifier.wosWOS:000256794600009
dc.language.isoeng
dc.publisherUniversidade de São Paulo (USP), Faculdade de Odontologia de Bauru
dc.relation.ispartofJournal of Applied Oral Science
dc.relation.ispartofjcr1.709
dc.relation.ispartofsjr0,645
dc.rights.accessRightsAcesso aberto
dc.sourceWeb of Science
dc.subjectdenturespt
dc.subjectacrylic resinspt
dc.subjectmicrowavespt
dc.subjectphysical propertiespt
dc.subjectstrengthpt
dc.titleFlexural strength of acrylic resins polymerized by different cyclesen
dc.typeArtigo
dcterms.licensehttp://www.scielo.br/revistas/jaos/iaboutj.htm#003
dcterms.rightsHolderUniv São Paulo Fac Odontologia Bauru
unesp.author.lattes7601364286525384
unesp.author.lattes2999722781960616[3]
unesp.author.lattes8921196002764597
unesp.author.orcid0000-0001-8437-9991[2]
unesp.author.orcid0000-0001-8439-0816[5]
unesp.author.orcid0000-0002-0203-2386[3]
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Odontologia, Araçatubapt

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Artigos - Materiais Odontológicos e Prótese - FOA