Influence of microwave polymerization method and thickness on porosity of acrylic resin

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorPero, Ana Carolina
dc.creatorBarbosa, Débora Barros
dc.creatorMarra, Juliê
dc.creatorRuvolo-Filho, Adhemar Colla
dc.creatorCompagnoni, Marco Antonio
dc.date2014-05-27T11:22:48Z
dc.date2016-10-25T18:25:12Z
dc.date2014-05-27T11:22:48Z
dc.date2016-10-25T18:25:12Z
dc.date2008-02-01
dc.date.accessioned2017-04-06T01:29:55Z
dc.date.available2017-04-06T01:29:55Z
dc.identifierJournal of Prosthodontics, v. 17, n. 2, p. 125-129, 2008.
dc.identifier1059-941X
dc.identifier1532-849X
dc.identifierhttp://hdl.handle.net/11449/70296
dc.identifierhttp://acervodigital.unesp.br/handle/11449/70296
dc.identifier10.1111/j.1532-849X.2007.00264.x
dc.identifier2-s2.0-38749087965
dc.identifierhttp://dx.doi.org/10.1111/j.1532-849X.2007.00264.x
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/891419
dc.descriptionPurpose: This study evaluated the influence of polymerization cycle and thickness of maxillary complete denture bases on the porosity of acrylic resin. Materials and Methods: Two heat-activated denture base resins - one conventional (Clássico) and one designed for microwave polymerization (Onda-Cryl) - were used. Four groups were established, according to polymerization cycles: A (Onda-Cryl, short microwave cycle), B (Onda-Cryl, long microwave cycle), C (Onda-Cryl, manufacturing microwave cycle), and T (Clássico, water bath). Porosity was evaluated for different thicknesses (2.0, 3.5, and 5.0 mm; thicknesses I, II, and III, respectively) by measurement of the specimen volume before and after its immersion in water. The percent porosity data were submitted to Kruskal-Wallis for comparison among the groups. Results: The Kruskal-Wallis test detected that the combinations of the different cycles and thicknesses showed significant differences, and the mean ranks of percent porosity showed differences only in the thinnest (2.0 mm) microwave-polymerized specimens (A = 53.55, B = 40.80, and C = 90.70). Thickness did not affect the results for cycle T (I = 96.15, II = 70.20, and III = 82.70), because porosity values were similar in the three thicknesses. Conclusions: Microwave polymerization cycles and the specimen thickness of acrylic resin influenced porosity. Porosity differences were not observed in the polymerized resin bases in the water bath cycle for any thickness. © 2007 by The American College of Prosthodontists.
dc.languageeng
dc.relationJournal of Prosthodontics
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectAcrylic resin
dc.subjectComplete denture
dc.subjectPolymerization method
dc.subjectPorosity
dc.subjectacrylic acid resin
dc.subjectbiomedical and dental materials
dc.subjectpoly(methyl methacrylate)
dc.subjectpolymer
dc.subjectwater
dc.subjectabsorption
dc.subjectchemistry
dc.subjectcomparative study
dc.subjectdenture
dc.subjectheat
dc.subjecthuman
dc.subjectmaterials testing
dc.subjectmicrowave radiation
dc.subjectporosity
dc.subjectpressure
dc.subjectradiation exposure
dc.subjectsurface property
dc.subjecttemperature
dc.subjecttime
dc.subjectAbsorption
dc.subjectAcrylic Resins
dc.subjectDental Materials
dc.subjectDenture Bases
dc.subjectDenture, Complete, Upper
dc.subjectHeat
dc.subjectHumans
dc.subjectMaterials Testing
dc.subjectMicrowaves
dc.subjectPolymers
dc.subjectPolymethyl Methacrylate
dc.subjectPressure
dc.subjectSurface Properties
dc.subjectTemperature
dc.subjectTime Factors
dc.subjectWater
dc.titleInfluence of microwave polymerization method and thickness on porosity of acrylic resin
dc.typeOtro


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