Effect Of Different Photoinitiators And Reducing Agents On Cure Efficiency And Color Stability Of Resin-based Composites Using Different Led Wavelengths

dc.creatorRamos Salles de Oliveir
dc.creatorDayane Carvalho; Rocha
dc.creatorMateus Garcia; Gatti
dc.creatorAlexandre; Correr
dc.creatorAmerico Bortolazzo; Ferracane
dc.creatorJack Liborio; Coelho Sinhoreti
dc.creatorMario Alexandre
dc.date2015-DEC
dc.date2016-06-07T13:35:12Z
dc.date2016-06-07T13:35:12Z
dc.date.accessioned2018-03-29T01:50:45Z
dc.date.available2018-03-29T01:50:45Z
dc.identifier
dc.identifierEffect Of Different Photoinitiators And Reducing Agents On Cure Efficiency And Color Stability Of Resin-based Composites Using Different Led Wavelengths. Elsevier Sci Ltd, v. 43, p. 1565-1572 DEC-2015.
dc.identifier0300-5712
dc.identifierWOS:000366459800024
dc.identifier10.1016/j.jdent.2015.08.015
dc.identifierhttp://www.sciencedirect.com/science/article/pii/S0300571215300403
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/244074
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1307772
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionObjectives: To evaluate the effect of photoinitiators and reducing agents on cure efficiency and color stability of resin-based composites using different LED wavelengths. Methods: Model resin-based composites were associated with diphenyl(2,4,6-trimethylbenzoyl) phosphine oxide (TPO), phenylbis(2,4,6-trimethylbenzoyl) phosphine oxide (BAPO) or camphorquinone (CQ) associated with 2-(dimethylamino) ethyl methacrylate (DMAEMA), ethyl 4-(dimethyamino) benzoate (EDMAB) or 4-(N,N-dimethylamino) phenethyl alcohol (DMPOH). A narrow (Smartlite, Dentisply) and a broad spectrum (Bluephase G2, Ivoclar Vivadent) LEDs were used for photo-activation (20 J/cm(2)). Fourier transform infrared spectroscopy (FT-IR) was used to evaluate the cure efficiency for each composite, and CIELab parameters to evaluated color stability (Delta E-00) after aging. The UV-vis absorption spectrophotometric analysis of each photoinitiator and reducing agent was determined. Data were analyzed using two-way ANOVA and Tukey's test for multiple comparisons (alpha = 0.05). Results: Higher cure efficiency was found for type-I photoinitiators photo-activated with a broad spectrum light, and for CQ-systems with a narrow band spectrum light, except when combined with an aliphatic amine (DMAEMA). Also, when combined with aromatic amines (EDMAB and DMPOH), similar cure efficiency with both wavelength LEDs was found. TPO had no cure efficiency when light-cured exclusively with a blue narrowband spectrum. CQ-systems presented higher color stability than type-I photoinitiators, especially when combined with DMPOH. Conclusions: After aging, CQ-based composites became more yellow and BAPO and TPO lighter and less yellow. However, CQ-systems presented higher color stability than type-I photoinitiators, as BAPO-and TPO-, despite their higher cure efficiency when photo-activated with corresponding wavelength range. Clinical Significance: Color matching is initially important, but color change over time will be one of the major reasons for replacing esthetic restorations; despite the less yellowing of these alternative photoinitiators, camphorquinone presented higher color stability. (C) 2015 Elsevier Ltd. All rights reserved.
dc.description43
dc.description12
dc.description
dc.description1565
dc.description1572
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionFAPESP [2013/04241-2]
dc.description
dc.description
dc.description
dc.languageen
dc.publisherELSEVIER SCI LTD
dc.publisher
dc.publisherOXFORD
dc.relationJOURNAL OF DENTISTRY
dc.rightsembargo
dc.sourceWOS
dc.subjectLight-curing Units
dc.subjectDental Photoinitiators
dc.subjectSystems
dc.subjectPolymerization
dc.titleEffect Of Different Photoinitiators And Reducing Agents On Cure Efficiency And Color Stability Of Resin-based Composites Using Different Led Wavelengths
dc.typeArtículos de revistas


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