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Effect of thermocycling on the flexural and impact strength of urethane-based and high-impact denture base resins

dc.contributor.authorMachado, Ana Lucia [UNESP]
dc.contributor.authorPuckett, Aaron D.
dc.contributor.authorBreeding, Larry C.
dc.contributor.authorWady, Amanda Fucci [UNESP]
dc.contributor.authorVergani, Carlos Eduardo [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversity of Mississippi
dc.date.accessioned2014-05-20T13:46:28Z
dc.date.available2014-05-20T13:46:28Z
dc.date.issued2012-06-01
dc.description.abstractObjective: Mechanical properties of the acrylic resins used for denture fabrication may be influenced by water and temperature. Thus, the aim of this study was to evaluate the effect of thermocycling on the flexural and impact strength of a high-impact (Lucitone 199) and a urethane-based denture material (Eclipse).Materials and methods: Flexural strength (64 x 10 x 3.3 mm) and impact strength (60 x 6 x 4 mm) specimens were made following the manufacturers' instructions and assigned to two groups (n = 10): control (C) - not thermocycled - and T - thermocycled (5000 cycles between 5 and 55 degrees C). Specimens were submitted to three-point bending and Charpy impact tests.Results: Flexural strength (MPa) and impact strength (kJ/m(2)) data were analysed with two-way ANOVA (p = 0.05). The flexural strength of material Eclipse (C, 136.5; T, 130.7) was significantly higher than that of resin Lucitone 550 (C, 99.4; T, 90.1). Material Eclipse exhibited significantly higher impact strength (C, 6.9; T, 5.3) than the resin Lucitone 550 (C, 3.5; T, 3.0). For both materials, a significant decrease in flexural and impact strengths was observed when the specimens were thermocycled.Conclusion: Flexural and impact strengths were higher for Eclipse than for Lucitone 550, in both groups. Thermocycling decreased the flexural and impact strengths of Eclipse and Lucitone 550.en
dc.description.affiliationUniv Estadual Paulista, UNESP, Araraquara Dent Sch, Dept Dent Mat & Prosthodont, BR-14801903 São Paulo, Brazil
dc.description.affiliationUniv Mississippi, Med Ctr, Dept Biomed Mat Sci, Sch Dent, Jackson, MS 39216 USA
dc.description.affiliationUniv Mississippi, Med Ctr, Dept Care Planning & Restorat Sci, Jackson, MS 39216 USA
dc.description.affiliationUnespUniv Estadual Paulista, UNESP, Araraquara Dent Sch, Dept Dent Mat & Prosthodont, BR-14801903 São Paulo, Brazil
dc.description.sponsorshipUNESP, Univ Estadual Paulista
dc.description.sponsorshipBanco Santander - Brazil
dc.format.extentE318-E323
dc.identifierhttp://dx.doi.org/10.1111/j.1741-2358.2011.00474.x
dc.identifier.citationGerodontology. Hoboken: Wiley-blackwell, v. 29, n. 2, p. E318-E323, 2012.
dc.identifier.doi10.1111/j.1741-2358.2011.00474.x
dc.identifier.issn0734-0664
dc.identifier.lattes8000248781842587
dc.identifier.lattes3003130522427820
dc.identifier.orcid0000-0002-7375-4714
dc.identifier.urihttp://hdl.handle.net/11449/16449
dc.identifier.wosWOS:000308547000047
dc.language.isoeng
dc.publisherWiley-Blackwell
dc.relation.ispartofGerodontology
dc.relation.ispartofjcr1.439
dc.relation.ispartofsjr0,627
dc.rights.accessRightsAcesso restritopt
dc.sourceWeb of Science
dc.subjectdenture base acrylic resinsen
dc.subjectflexural strengthen
dc.subjectimpact strengthen
dc.subjectthermocyclingen
dc.titleEffect of thermocycling on the flexural and impact strength of urethane-based and high-impact denture base resinsen
dc.typeArtigopt
dcterms.licensehttp://olabout.wiley.com/WileyCDA/Section/id-406071.html
dcterms.rightsHolderWiley-blackwell
dspace.entity.typePublication
relation.isDepartmentOfPublication3936e2e2-946a-42ab-8b9d-9521513200fc
relation.isDepartmentOfPublication.latestForDiscovery3936e2e2-946a-42ab-8b9d-9521513200fc
relation.isOrgUnitOfPublicationca4c0298-cd82-48ee-a9c8-c97704bac2b0
relation.isOrgUnitOfPublication.latestForDiscoveryca4c0298-cd82-48ee-a9c8-c97704bac2b0
unesp.author.lattes8000248781842587[1]
unesp.author.lattes3003130522427820[5]
unesp.author.orcid0000-0002-7375-4714[5]
unesp.author.orcid0000-0002-2718-428X[1]
unesp.campusUniversidade Estadual Paulista (UNESP), Faculdade de Odontologia, Araraquarapt
unesp.departmentMateriais Odontológicos e Prótese - FOARpt

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