Bleaching Agents
Mostrando 37-48 de 67 artigos, teses e dissertações.
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37. A influência da fonte fotoativadora e de diferentes produtos de uso profissional sobre o clareamento de dentes desvitalizados : estudo ex vivo / The influence of light source and different products for professional use on the bleaching of devitalized teeth : ex vivo study
There are controversies about the use of light sources to accelerate the bleaching agents in teeth submitted to endodontic treatment. The objective of this study was to analyse quantitatively the bleaching ability of different products for professional use, photoactivated or not, on bovine teeth stained artificially. Fifty bovine incisor were divided on five
Publicado em: 2009
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38. EFEITOS DE AGENTES CLAREADORES EXTERNOS NOS TECIDOS DENTÁRIOS E NA JUNÇÃO AMELOCEMENTÁRIA / Effects of external bleaching agents on dental tissues and the cementoenamel junction
Evaluate with a scanning electron microscope the alterations occurring in enamel, cementum and cementoenamel junction after the use of different external bleaching agents. Fifteen healthy pre-molars were sectioned in the middle with the aid of a cutting machine (Labcut 1010), in the longitudinal direction along the axis of the teeth, obtaining mesial and dis
Publicado em: 2009
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39. Avaliação do efeito de diferentes agentes clareadores na rugosidade superficial e estabilidade de cor de dois compósitos / In vitro evaluation of different bleaching agents on the roughness and color stability of two dental composites
O objetivo deste estudo foi avaliar, in vitro, o efeito de dois clareadores a base de peróxido de hidrogênio a 10% e a 35%, Rembrandt Whitening Pen/Oral B e Whiteness HP Maxx/FGM na estabilidade de cor e rugosidade superficial de dois compósitos, sendo um nanohíbrido TPH3/ Dentsply e outro nanoparticulado Filtek Z350/3M ESPE. Foram confeccionados 40 corp
Publicado em: 2009
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40. Avaliação da adesão dental do cimento de ionômero de vidro e resina composta em função do tratamento dentinário com agentes clareadores / Evaluate of the dental bond strength of glass-ionomer cements and composite resin in dentin treated with bleaching agents
O objetivo desse trabalho foi avaliar in vitro a diferença da força de cisalhamento da dentina quando submetida a ação de algumas substâncias utilizadas como clareadores dentais e posteriormente restaurados com cimento de ionômero de vidro e resina composta. Utilizou-se 152 terceiros molares superiores hígidos que tiveram suas superfícies palatinas d
Publicado em: 2009
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41. Color, composition and superficial roughness evaluation of bovine enamel after treatment with different gel and whitening dentifrice using reflectance, superficial roughness and μEDX / Avaliação da cor, superfície e composição do esmalte dental bovino após tratamento com diferentes géis e dentifrícios clareadores por meio de fotorreflectância, rugosidade superficial e EDEX
Aim: to investigated quantitatively the color alteration, superficial roughness and composition of the bovine enamel after dental bleaching with carbamide peroxide 10% and hydrogen peroxide 6%. Methods: It was used 90 fragments of bovine teeth that were randomized divided in 9 groups (n=10) dependents on the bleaching treatments (n=10): Hydrogen peroxide 6,0
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 12/08/2008
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42. Enamel susceptibility to red wine staining after 35% hydrogen peroxide bleaching
Concern has been expressed regarding the staining of enamel surface by different beverages after bleaching. This study investigated the influence of 35% hydrogen peroxide bleaching agents on enamel surface stained with wine after whitening treatments. Flat and polished bovine enamel surfaces were submitted to two commercially available 35% hydrogen peroxide
Journal of Applied Oral Science. Publicado em: 2008-06
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43. Determination of internal bovine dental bleaching with different bleaching agents / Determinação do grau de clareamento interno de dentes bovinos submetidos a diferentes agentes clareadores.
The purpose of this study was to evaluate the bleaching effect of 37% carbamide peroxide, sodium perborate mixed with distilled water and sodium perborate mixed with 35 hydrogen peroxide on artificially stained pulpless teeth. Eighteen bovine teeth were sectioned 3mm apical of the cement-enamel junction and were divided into eight groups. Four groups was dir
Publicado em: 2008
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44. 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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45. Influência de agentes clareadores e ativação por luz sobre a resistência à fratura de dentes humanos hígidos: estudo ex-vivo / Influence of bleaching agents and light activation on the resistance to fracture of sound human teeth: an ex-vivo study
This study evaluated the influence of bleaching agents, photoactivated or not, on the resistance to fracture of sound teeth. Ninety superior incisors were randomly divided into 9 groups (n=10) according to the surface treatment performed on the vestibular face: GI 35% carbamide peroxide, GII - 38% hydrogen peroxide, GIII - halogen light, GIV - LED-laser syst
Publicado em: 2008
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46. In vitro assessment of intracoronal bleaching using 2% chlorhexidine gel associated to different bleaching agents / Estudo "in vitro" da associação da clorexidina gel 2% a agentes clareadores utilizados durante o clareamento dental interno
Non-vital tooth bleaching is a conservative esthetic treatment for endodontically treated discolored teeth. It is effective and relatively inexpensive. The purpose of this study was to evaluate ?in vitro? the association of sodium perborate + 2% chlorhexidine gel comparing with sodium perborate + distilled water; sodium perborate + 30%hydrogen peroxide (H2O2
Publicado em: 2007
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47. Influence of different formulations of bleaching agents on enamel and dentin physical and chemical properties / Influencia de diferentes formulações de agentes clareadores nas propriedades fisicas e quimicas do esmalte e dentina
Section A: Effects of bleaching agents on dental enamel Since the introduction of the nightguard vital bleaching technique using 10% carbamide peroxide (10% CP), reports have evaluated the effects of bleaching agents on human enamel. Evidences show that CP is able to alter the composition and morphology of enamel substrate. In order to reduce the adverse eff
Publicado em: 2007
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48. Effects of bleaching agents of high concentration for treatment in office in microhardness, morphology and chemical composition of human enamel / Efeitos de agentes clareadores de alta concentração para tratamento em consultorio na microdureza, morfologia e composição quimica do esmalte humano
Several studies have been concerned with the adverse effects produced by home applied and in-office bleaching treatments. The aim of this study is to evaluate the effects of highconcentrated bleaching agents (35% hydrogen peroxide) on human enamel microhardness, chemical and structural composition. Sixty and five human third molars human were used. Two ename
Publicado em: 2007