Halogen Lamp
Mostrando 13-24 de 35 artigos, teses e dissertações.
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13. Influence of the photoinitiator system and light photoactivation units on the degree of conversion of dental composites
The aim of this study was to observe the influence of two light polymerization units (LED or halogen light) on the degree of conversion (DC) of three dental composites with lighter shades and a different photoinitiator system. The top (T) and bottom (B) surfaces of 60 discs of composite resin (Filtek™ Supreme, Filtek™ Z250, Tetric™ Ceram Bleach) cured
Brazilian Oral Research. Publicado em: 2010-12
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14. Avaliação da microdureza superficial de resinas compostas à base de metacrilato e silorano fotopolimerizadas com fontes de luz halógena e LED, em diferentes profundidades / Evaluation of the surface microhardness at different depths of methacrylate and silorane based composites cured with halogen lamps or LED
The enhanced mechanical properties of composites, as well as superior curing units, allowed the use of such restorative materials with more predictable results. However, it is known that the success of esthetic restorations depends on many factors such the amount and depth of polymerization, the type of curing unit used, the light intensity and the propertie
Publicado em: 2010
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15. Estudo, in vitro, da influência da técnica e do aparelho de fotopolimerização na resistência de união de pinos intra-radiculares / In vitro study of influence of technique and light curing unit in retention force of fiber post system
Objetivo: Este estudo se propõe a verificar a influencia do tipo de luz fotopolimerizadora na força de retenção de pinos intra-radiculares, tanto na técnica direta como na direta indireta. Métodos: 40 raízes de dentes bovinos com comprimento de 12 mm foram tratadas endodonticamente e divididas aleatoriamente em 4 grupos de acordo com a técnica de obt
Publicado em: 2010
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16. Knoop hardness analisys of a resin composite activated by halogen lamp and LED, varying the luminous density / Avaliação da microdureza de resina composta polimerizada com fontes de luz halógena e LED, em função da densidade de energia luminosa irradiada
No presente estudo, avaliou-se a microdureza da resina composta Z250 (3M ESPE), quando ativada em diferentes tempos (s), diferentes densidades de potência (mW/cm²), em relação à quantidade de energia irradiada (8, 12 e 16 J/cm²), com a finalidade de estabelecer uma densidade de energia luminosa mínima capaz de polimerizar adequadamente os compósitos.
Publicado em: 2009
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17. Influência da aplicação de selantes de superfície na rugosidade de resinas compostas / Surface sealant application influence on the resin composite roughness.
This in vitro study evaluated the influence of the application of four surface sealers on the surface roughness of composite resins. Fifty specimens were divided into ten groups according to different patterns of composite resin and surface sealers, as follows: G1. Control with Concept resin; G2. Concept + Fortify; G3. Concept + Biscover; G4. Concept + Lasti
Publicado em: 2009
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18. Influence of energy density of different light sources on knoop hardness of a dual-cured resin cement
The purpose of this study was to evaluate the Knoop hardness of a dual-cured resin-based luting cement irradiated with different light sources as well energy density through a ceramic sample. Three light-curing unit (LCUs) were tested: tungsten halogen light (HAL), light-emitting diode (LED) and xenon plasma-arc (PAC) lamp. Disc-shaped specimens were fabrica
Journal of Applied Oral Science. Publicado em: 2008-06
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19. Evaluation of different on tooth bleaching : in vitro study / Avaliação de diferentes catalisadoores no clareamento dental : estudo in vitro
The aim of this in vitro study was to evaluate the bleaching efficacy of high concentration bleaching agents activated by chemical or physical catalysts. For this, this study was divided in two parts: Experiment 1- evaluated the efficacy of tooth whitening after treatment with 35 % hydrogen peroxide (Whiteness HP Maxx) activated by different light-curing uni
Publicado em: 2008
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20. The effect of different light-curing units on tensile strength and microhardness of a composite resin
The aim of this study was to evaluate the influence of different light-curing units on the tensile bond strength and microhardness of a composite resin (Filtek Z250 - 3M/ESPE). Conventional halogen (Curing Light 2500 - 3M/ESPE; CL) and two blue light emitting diode curing units (Ultraled - Dabi/Atlante; UL; Ultrablue IS - DMC; UB3 and UB6) were selected for
Journal of Applied Oral Science. Publicado em: 2007-12
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21. Transmission of composite polymerization contraction force through a flowable composite and a resin-modified glass ionomer cement
The purpose of this study was to evaluate the individual contraction force during polymerization of a composite resin (Z-250), a flowable composite (Filtek Flow, FF) and a resin-modified glass ionomer cement (Vitrebond, VB), and the transmission of Z-250 composite resin polymerization contraction force through different thicknesses of FF and VB. The experime
Journal of Applied Oral Science. Publicado em: 2007-12
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22. Influence of different light-curing units on the surface roughness of restorative materials: in situ study
The aim of this study was to evaluate the influence of different light sources (LED and Halogen lamp) on the roughness (superficial) of composite resin (Filtek Z250, Filtek P60, Charisma and Durafill) varying post-irradiation times, in an in situ experiment. For this purpose, 80 specimens were made in polyurethane moulds. Ten volunteers without medicament us
Materials Research. Publicado em: 2007-09
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23. "Avaliação da resistência flexural, microinfiltração e grau de conversão de uma resina composta fotoativada com luz halógena e laser de argônio" / Evaluation of the flexural strenght, microleakage and degree of convertion of a composite resin photocured with argon laser and halogen lamp.
Nesta pesquisa foi avaliado a resistência flexural, a microinfiltração e o grau de conversão de uma resina composta micro-híbrida fotoativada por laser de argônio e luz halógena. Para o teste de resistência flexural e grau de conversão foram preparadas cinco amostras de 25 X 2 X 2mm de acordo com a norma ISO 4049. Os parâmetros de fotoativação ut
Publicado em: 2007
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24. Avaliação clínica e laboratorial de resina composta em função da fotoativação com diferentes fontes de luz e densidades de potência / Clinical and laboratorial evaluation of resin composite light-cured with different curing units and power densities
The aim of this study was to evaluate the clinical and laboratorial performance of a resin composite light-cured with different light-curing units and power densities, at a standard energy density level. Degree of conversion of the resin composite was determined by Fourier transformed infrared spectroscopy. The degree of softening of the resin composite in e
Publicado em: 2007