Photoelastic evaluation of the effect of composite formulation on polymerization shrinkage stress

dc.creatorOliveira, KMC
dc.creatorConsani, S
dc.creatorGoncalves, LS
dc.creatorBrandt, WC
dc.creatorCcahuana-Vasquez, RA
dc.date2012
dc.dateMAY-JUN
dc.date2014-07-30T14:31:44Z
dc.date2015-11-26T17:29:05Z
dc.date2014-07-30T14:31:44Z
dc.date2015-11-26T17:29:05Z
dc.date.accessioned2018-03-29T00:16:07Z
dc.date.available2018-03-29T00:16:07Z
dc.identifierBrazilian Oral Research. Sociedade Brasileira De Pesquisa Odontologica, v. 26, n. 3, n. 202, n. 208, 2012.
dc.identifier1806-8324
dc.identifierWOS:000311862500004
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/59605
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/59605
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1285199
dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.descriptionWe compared polymerization stress in two commercial composites and three experimental composites made using camphorquinone (CQ) and/or phenylpropanedione (PPD) as photoinitiators. The internal surfaces of photoelastic resin discs with cylindrical cavities were roughened and treated with adhesive. Composites were divided into five groups: two commercial composites (Filtek Silorane and Filtek Z250) and three experimental composites with CQ/amine, CQ/PPD/amine, and PPD/amine. Composites were photopolymerized inside cavities, and subjected to photoelastic analysis immediately and at 24 hours and 7 days later using a plane polariscope. Stress created by Silorane (3.08 +/- 0.09 MPa) was similar to that of Z250 (3.19 +/- 0.13 MPa) immediately after photopolymerization (p > 0.05). After 24 hours and 7 days, Z250 (3.53 +/- 0.15 and 3.69 +/- 0.10 MPa, respectively) showed higher stress than Silorane (3.19 +/- 0.10 and 3.16 +/- 0.10 MPa, respectively). Qualitative analysis immediately after photopolymerization showed composite/CQ promoted higher stress than PPD, but stress levels at other evaluated times were statistically similar, varying between 3.45 +/- 0.11 MPa and 3.92 +/- 0.13 MPa. At 24 hours and 7 days, Silorane created the lowest stress. All photoinitiators created comparable tensions during polymerization.
dc.description26
dc.description3
dc.description202
dc.description208
dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.languageen
dc.publisherSociedade Brasileira De Pesquisa Odontologica
dc.publisherSao Paulo
dc.publisherBrasil
dc.relationBrazilian Oral Research
dc.relationBraz. Oral Res.
dc.rightsaberto
dc.sourceWeb of Science
dc.subjectComposite Resins
dc.subjectPolymerization
dc.subjectPhotoinitiators
dc.subjectDental
dc.subjectDental Stress Analysis
dc.subjectDental Resin Composites
dc.subjectConversion
dc.subjectMonomer
dc.titlePhotoelastic evaluation of the effect of composite formulation on polymerization shrinkage stress
dc.typeArtículos de revistas


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