Halogen Light Light Emitting
Mostrando 1-12 de 31 artigos, teses e dissertações.
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1. Influence of photo-activation source on enamel demineralization around restorative materials
This study evaluated the effects of the photoactivation source and restorative material on the development of caries-like lesions on human enamel after an in vitro pH challenge. Enamel cavities were prepared in 36 blocks, which were assigned to two groups according to the restorative material: resin-modified glass ionomer (RMGI) and composite resin (CR). Sam
Braz. oral res.. Publicado em: 01/03/2013
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2. Avaliação da influência das fontes de ativação na profundidade de polimerização de materiais restauradores e seus efeitos na resistência á desmineralização do esmalto. / Evaluation of the influence of sources of activation in depth of cure restorative materials and their effects on resistance to demineralization esmalto.
profundidade de polimerização de materiais restauradores e seus efeitos na resistência à desmineralização do esmalte. Dezoito dentes humanos foram seccionados em trinta e seis blocos. Cavidades foram realizadas e os dentes foram divididos em 2 grupos de acordo com o material restaurador (n=18): ionômero de vidro modificado por resina - IVRM (Vitremer-
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/02/2012
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3. Effect of a multi-layer infection control barrier on the micro-hardness of a composite resin
OBJECTIVE: The aim of this study was to evaluate the effect of multiple layers of an infection control barrier on the micro-hardness of a composite resin. MATERIAL AND METHODS: One, two, four, and eight layers of an infection control barrier were used to cover the light guides of a high-power light emitting diode (LeD) light curing unit (LCU) and a low-power
J. Appl. Oral Sci.. Publicado em: 2012-10
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4. Degree of conversion of nanofilled and microhybrid composite resins photo-activated by different generations of LEDs
OBJECTIVE:This study aimed at evaluating the degree of conversion (DC) of four composite resins, being one nanofilled and 3 microhybrid resins, photo-activated with second- and third-generation light-emitting diodes (LEDs). MATERIAL AND METHODS: Filtek TM Z350 nanofilled composite resins and Amelogen® Plus, Vit-l-escenceTM and Opallis microhybrid resins wer
Journal of Applied Oral Science. Publicado em: 2012-04
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5. Effect of light sources and curing mode techniques on sorption, solubility and biaxial flexural strength of a composite resin
Adequate polymerization plays an important role on the longevity of the composite resin restorations. OBJECTIVES: The aim of this study was to evaluate the effect of light-curing units, curing mode techniques and storage media on sorption, solubility and biaxial flexural strength (BFS) of a composite resin. MATERIAL AND METHODS: Two hundred and forty specime
Journal of Applied Oral Science. Publicado em: 2012-04
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6. Dental pulp vascular permeability changes induced by dental bleaching
Aiming to compare the effect of different light sources for dental bleaching on vascular permeability of dental pulps, forty-eight incisors were used. The bleaching agent (35 % hydrogen peroxide) was activated by halogen light; LED (Light Emitting Diode) or LED, followed by laser phototherapy (LPT) (λ = 780 nm; 3 J/cm²). After the bleaching procedures, the
Brazilian Archives of Biology and Technology. Publicado em: 2012-02
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7. Effect of active sources in microhardness restorations and composite resin-modified glass ionomer resin and cariostatic. / Efeito de fontes ativadoras na microdureza de restaurações de resina composta e ionômero de vidro modificado por resina e potencial cariostático.
O objetivo desse estudo foi avaliar os efeitos das fontes de ativação e de materiais restauradores após desafio ácido in vitro por meio de microdureza de esmalte humano e o grau de polimerização indireto dos materiais restauradores. Dentes humanos foram seccionados em trinta e seis blocos. Cavidades de 1,6mm foram realizadas com pontas diamantadas. Os
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/02/2011
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8. Effect of different light curing methods on mechanical and physical properties of resin-cements polymerized through ceramic discs
OBJECTIVE: The aim of this study was to compare the polimerization ability of three different light-curing units (quartz tungsten halogen, light-emitting diodes and plasma arc) and their exposure modes (high-intensity and soft-start) by determination of microhardness, water sorption and solubility, and diametral tensile strength of 5 dual-curing resin cement
J. Appl. Oral Sci.. Publicado em: 01/07/2011
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9. Composite resin color stability: influence of light sources and immersion media
OBJECTIVE: This study evaluated the influence of light sources and immersion media on the color stability of a nanofilled composite resin. MATERIAL AND METHODS: Conventional halogen, high-power-density halogen and high-power-density light-emitting diode (LED) units were used. There were 4 immersion media: coffee, tea, Coke® and artificial saliva. A total of
Journal of Applied Oral Science. Publicado em: 2011-06
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10. Knoop microhardness and FT-Raman evaluation of composite resins: influence of opacity and photoactivation source
The aim of this study was to evaluate the degree of conversion by Knoop microhardness (KHN) and FT-Raman spectroscopy (FTIR) of one nanofilled (Filtek Supreme-3M-ESPE [FS]) and one microhybrid composite (Charisma-Heraeus-Kulzer [CH]), each with different opacities, namely enamel, dentin, and translucent, which were photo-activated by a quartz-tungsten-haloge
Brazilian Oral Research. Publicado em: 2011-06
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11. Efeito fotoiniciador sobre propriedades físicas, mecânicas e térmicas de compósitos experimentais fotoativados por luz de lâmpada halógena e LEDs / Effect of the photo-initiator on physical, mechanics and thermal properties of experimental composites photo-activated for halogen lamp and LEDs
The aim of this study was to analyze the spectrum of different lightcuring units (LCUs) and photo-initiators and yours influence in the physical and thermal properties and bond strength (BS) of experimental resin composites with different photo-initiators. A blend with BisGMA, UDMA, BisEMA, TEGDMA and 65 wt% of silanated filler particles was prepared with CQ
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 05/08/2010
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12. Hardening of a dual-cure resin cement using QTH and LED curing units
OBJECTIVE: This study evaluated the surface hardness of a resin cement (RelyX ARC) photoactivated through indirect composite resin (Cristobal) disks of different thicknesses using either a light-emitting diode (LED) or quartz tungsten halogen (QTH) light source. MATERIAL AND METHODS: Eighteen resin cement specimens were prepared and divided into 6 groups acc
Journal of Applied Oral Science. Publicado em: 2010-04