Halogen Light
Mostrando 13-24 de 99 artigos, teses e dissertações.
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13. Halogen light versus LED for bracket bonding: shear bond strength
INTRODUÇÃO: os aparelhos de fotopolimerização por LED buscam proporcionar uma luz ativadora fria, que possibilite protocolos de polimerização do material com menor tempo de duração. OBJETIVO: avaliar a resistência à tração da colagem de braquetes, utilizando três tipos de aparelhos fotoativadores: um de luz halógena (Optilight Plus - Gnatus) e
Dental Press J. Orthod.. Publicado em: 2013-02
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14. 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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15. 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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16. 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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17. 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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18. A randomized double-blind clinical trial of posterior composite restorations with or without bevel: 1-year follow-up
OBJECTIVE: This randomized double-blind clinical trial compared the performance of posterior composite restorations with or without bevel, after 1-year follow-up. MATERIAL AND METHODS: Thirteen volunteers requiring at least two posterior composite restorations were selected. Twenty-nine cavities were performed, comprising 14 without bevel (butt joint) and 15
Journal of Applied Oral Science. Publicado em: 2012-04
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19. 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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20. 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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21. Surface energy and wettability of polymers light-cured by two different systems
OBJECTIVE: This study evaluated the surface energy and wettability of composite resins polymerized by different light-curing units to ascertain the good wetting of tooth surfaces to achieve adhesion. MATERIAL AND METHOD: Filtek Z350 (3M ESPE), Admira (VOCO) and Grandio (VOCO) resins were selected for the testing procedures. The resins were light cured using
Journal of Applied Oral Science. Publicado em: 2011-10
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22. 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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23. 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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24. 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