Assessment Of The Polymerization Contraction Stress Of Composites Photoactivated By Halogen Light And Light-emitting Diode.

dc.creatorda Fonseca Roberti Garcia, L
dc.creatorZago Naves, L
dc.creatorCorrer-Sobrinho, L
dc.creatorConsani, S
dc.date
dc.date2015-11-27T13:15:44Z
dc.date2015-11-27T13:15:44Z
dc.date.accessioned2018-03-29T01:09:45Z
dc.date.available2018-03-29T01:09:45Z
dc.identifierMinerva Stomatologica. v. 58, n. 11-12, p. 577-84
dc.identifier0026-4970
dc.identifier
dc.identifierhttp://www.ncbi.nlm.nih.gov/pubmed/20027128
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/198558
dc.identifier20027128
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1298791
dc.descriptionThe aim of this study was to compare the polymerization contraction stress of composites photoactivated by two light sources: quartz tungsten halogen light (QTH) and light emitting diode (LED). Glass rods were fabricated (5.0 mm X 5.0 cm) and one of the surfaces was air abraded with aluminum oxide. An adhesive was applied to this surface and photoactivated by LED. The glass rods were assembled to a Universal Testing machine (Instron - 5565) and the composite were applied to the lower rod using a manual instrument. The upper rod was placed closer, at 2 mm, and an extensometer was attached to the rods. The twenty composites were polymerized by either by QTH (N.=10) or LED (N.=10). Polymerization was carried out using two apparatuses positioned in opposite sides, which were simultaneously activated for 30 seconds. Contraction stress was analyzed twice: shortly after polymerization (t30s) and 30 minutes later (t30min). The contraction stress for all composites was higher at t30min than at t30s, regardless of the activation source. Z100 showed lower contraction stress values (P<0.05) compared to the other composites. Regarding to Charisma and TPH, the photoactivation source had no influence on contraction stress, except for Z100 at t30min. It was concluded that composite composition is the factor that most influence the polymerization contraction stress.
dc.description58
dc.description577-84
dc.languageeng
dc.relationMinerva Stomatologica
dc.relationMinerva Stomatol
dc.rightsfechado
dc.rights
dc.sourcePubMed
dc.subjectComposite Resins
dc.subjectCuring Lights, Dental
dc.subjectIn Vitro Techniques
dc.subjectLight
dc.subjectLight-curing Of Dental Adhesives
dc.subjectMaterials Testing
dc.subjectPhotochemical Processes
dc.subjectResin Cements
dc.subjectSilicon Dioxide
dc.subjectStress, Mechanical
dc.subjectZirconium
dc.titleAssessment Of The Polymerization Contraction Stress Of Composites Photoactivated By Halogen Light And Light-emitting Diode.
dc.typeArtículos de revistas


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