Bleaching Agents
Mostrando 13-24 de 67 artigos, teses e dissertações.
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13. Effect of bleaching agents containing fluoride or calcium on enamel microhardness, roughness and permeability
Abstract Aim: To evaluate the effect of different in-office bleaching agents on the permeability, roughness and surface microhardness of human enamel. Methods: For evaluation of roughness and microhardness, 40 hemi-faces of 20 premolars were subjected to initial roughness (Ra parameter) and microhardness (VHN) measurements. Thirty-two premolar's crowns w
Braz. J. Oral Sci.. Publicado em: 2015-12
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14. Dental bleaching agents with calcium and their effects on enamel microhardness and morphology
Aim: To evaluate enamel microhardness and morphology after bleaching with hydrogen peroxide containing calcium in different concentrations.
Methods: One hundred specimens of human teeth were ground and polished and had the initial microhardness evaluated. The specimens were randomly assigned into five grou
Braz. J. Oral Sci.. Publicado em: 2015-06
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15. Genotoxic potential of 10% and 16% Carbamide Peroxide in dental bleaching
Dental bleaching has become one of the most frequently requested esthetic treatments in dental offices. Despite the high clinical success observed with this procedure, some adverse effects have been reported, including a potential for developing premalignant lesions, root resorption and tooth sensitivity, especially when misused. The aim of this study was to
Braz. oral res.. Publicado em: 13/01/2015
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16. Effect of coffe and a cola-based soft drink on the color stability of bleached bovine incisors considering the time elapsed after bleaching
There is no consensus about the waiting time necessary for the patient to start consuming beverages containing colorants again after bleaching. Objective: To evaluate the influence of beverages with coloring agents on bleached bovine incisors considering the time elapsed after bleaching. Materials and methods: Sixty bovine incisors were bleached with 35%
J. Appl. Oral Sci.. Publicado em: 29/07/2014
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17. Evaluation of human enamel permeability exposed to bleaching agents
AIM: To evaluate the human enamel permeability after different external bleaching techniques. METHODS: The coronal portions of 20 maxillary human incisors were covered with an acid resistant varnish, except the labial surface, to prevent dye penetration of silver nitrate. The specimens were divided randomly into four groups (n=5) according to the bleaching t
Braz. J. Oral Sci.. Publicado em: 2013-06
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18. AVALIAÇÃO DAS DIFERENTES TÉCNICAS DE CLAREAMENTO DENTAL DE CONSULTÓRIO: EFETIVIDADE, SENSIBILIDADE PÓS-TRATAMENTO E EFEITOS SOBRE O COMPLEXO DENTINO-PULPAR / Assessment of different in-office tooth bleaching techniques: Effectiveness, sensitivity post-treatment and effects on the pulp-dentin complex
The use of bleaching gels with low hydrogen peroxide (HP) concentration, as well as the reduction of application times or its association with calcium-containing agents may be clinical approaches to reduce the amount of HP that reaches the pulp tissue to cause local damage. However, only a few data have been published about the pulp response of human teeth s
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/12/2012
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19. EFFECT OF BLEACHING AGENTS ON COLOR OF COMPOSITE RESINS WITH DISTINCT OPACITYS STORED IN DIFERENT MEDIAS / INFLUÊNCIA DE AGENTES CLAREADORES NA COR DE RESINAS COMPOSTAS DE DIFERENTES OPACIDADES ARMAZENADAS EM MEIOS DISTINTOS
Este trabalho teve por objetivo avaliar a influência de dois agentes clareadores sobre a cor de uma resina composta (Filtek Z350 XT 3M ESPE) nas opacidades de esmalte e dentina, previamente submetidas à ação de água deionizada ou vinho tinto suave. Foram confeccionados 60 corpos-de-prova (cps) para cada resina composta utilizando uma matriz metálica co
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/03/2012
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20. Avaliação da biocompatibilidade do clareamento dental caseiro e de terapias para a redução dos efeitos deletérios dos agentes clareadores sobre o tecido pulpar : estudos "in vitro" e "in vivo" / Evaluation of the Biocompatibility of the at-home dental bleaching and therapies for reduction of the deleterious effects caused by the bleaching agents on the pulp tissue : in vitro and in vivo studies
Os objetivos do presente trabalho foram: a) avaliar os efeitos citotóxicos de aplicações sucessivas do agente clareador a base de peroxido de carbamida (PC) 10% sobre células odontoblásticas; b) avaliar a toxicidade "in vivo" do tratamento clareador em dentes de ratos Wistar; c) verificar se o ácido ascórbico (AA) e capaz de reduzir os efeitos tóxico
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 07/03/2012
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21. Clinical evaluation of the influence of coffee in the effectiveness of dental bleaching / AVALIAÇÃO CLÍNICA DA INFLUÊNCIA DO CAFÉ NA EFETIVIDADE DO CLAREAMENTO DENTAL
O objetivo deste estudo clínico foi avaliar se a exposição ao café durante o tratamento clareador com PC 16% (Whiteness Perfect, FGM, Joinville, Santa Catarina, Brasil) afeta o grau de clareamento e a sensibilidade dental. Foram selecionados 40 pacientes com os incisivos centrais mais escuros que A2, os quais foram divididos em 2 grupos (n=20): GC - grup
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/02/2012
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22. Influence of fluoride-containing adhesives and bleaching agents on enamel bond strength
This study evaluated the influence of fluoride-containing carbamide peroxide (CP) bleaching agents and adhesive systems on bonded enamel interfaces that are part of the dynamic pH cycling and thermal cycling models. The buccal surfaces of 60 bovine incisors were restored with a composite resin and bonded with three- and two-step, etch-and-rinse, fluoride-con
Braz. oral res.. Publicado em: 2012-12
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23. Effects of bleaching agents and adhesive systems in dental pulp: a literature review
The dental pulp may be exposed to several irritants that are potentially noxious to the health and functions of this tissue. Each type of irritant or injury has different effects on the pulp, which are generally characterized by acute inflammation, chronic inflammation or necrosis. Common examples of irritants are dental caries, cavity preparation procedures
Braz. J. Oral Sci.. Publicado em: 2012-12
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24. Comparative clinical study of the effectiveness of different dental bleaching methods - two year follow-up
This study evaluated color change, stability, and tooth sensitivity in patients submitted to different bleaching techniques. MATERIAL AND METHODS: In this study, 48 patients were divided into five groups. A half-mouth design was conducted to compare two in-office bleaching techniques (with and without light activation): G1: 35% hydrogen peroxide (HP) (Lase P
J. Appl. Oral Sci.. Publicado em: 2012-08