Influência Da Presença Do Cálcio Em Agentes Clareadores E Sua Relação Com a Microdureza Do Esmalte Dental Humano

Amaral, Palmira Gomes; Sales, Germana Coeli de Farias; Santos, Rosenês Lima dos; Magalhães, Danilo Barboza Lopes; Gusmão, Estela Santos

doi:10.4034/rbcs.2010.14.02.05

Cited by 4 publications

(5 citation statements)

References 4 publications

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“… 16 Studies have evinced that the presence of calcium in 35% hydrogen peroxide-based bleaching agents increased microhardness of bleached enamel, thus resulting in remineralization of this substrate. 17 Therefore, the addition of calcium and fluoride helps to control mineral loss in enamel submitted to different bleaching treatments. 18…”

Section: Introductionmentioning

confidence: 99%

Influence of bleaching and desensitizing gel on bond strength of orthodontic brackets

Britto

Lucato

Valdrighi

et al. 2015

Dental Press J. Orthod.

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OBJECTIVE: The objective of this study was to assess, in vitro, the influence of bleaching gel and the use of desensitizing agent over bond strength of ceramic brackets bonded to bovine enamel. METHODS: One hundred bovine incisors were selected and randomly divided into five groups (n = 20): Group 1, control group (without bleaching); Group 2, bleached with 35% hydrogen peroxide; Group 3, bleached with 35% hydrogen peroxide (three applications, 15 minutes each) and desensitizing agent applied for 10 minutes; Group 4, bleached with 35% hydrogen peroxide for 40 minutes; Group 5, bleached with 35% hydrogen peroxide for 40 minutes with desensitizing agent applied for 10 minutes. Brackets were bonded 7 days after bleaching and submitted to shear bond strength test after 24 hours at a compression rate of 1 mm/minute. After fracture, the adhesive remnant index (ARI) was assessed under stereoscopic at 40 x magnification. Shear strength data (MPa) were submitted to one-way ANOVA and Tukey's test with significance level set at 5%. RESULTS: Group 5 (29.33 MPa) showed significantly higher bond strength than Group 1 (19.19 MPa), Group 2 (20.59 MPa) and Group 4 (23.25 MPa), but with no difference in comparison to Group 3. There was no significant difference among the other groups. The adhesive remnant index showed predominance of score 3, that is, all resin remained adhered to enamel for all groups. CONCLUSION: Bleaching with 35% hydrogen peroxide with calcium associated with desensitizing agent application produced higher bond strength values of brackets bonded to bovine enamel.

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Section: Introductionmentioning

confidence: 99%

Influence of bleaching and desensitizing gel on bond strength of orthodontic brackets

Britto

Lucato

Valdrighi

et al. 2015

Dental Press J. Orthod.

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“…Com os objetivos de reduzir possíveis efeitos deletérios no esmalte dental e aumentar a resistência à desmineralização do esmalte, surgiram agentes clareadores modificados com adição de cálcio 10 . A adição dos íons cálcio ao gel seria capaz de promover a saturação do agente clareador e diminuir a perda de minerais do esmalte durante o tratamento, aumentando, consequentemente, a resistência à desmineralização 20 .…”

Section: Discussionunclassified

“…A maior parte dos estudos concorda que as presenças de Ca e F seriam capazes de reduzir os efeitos deletérios dos agentes clareadores 10,23 . Alguns estudos observaram diminuição da microdureza do esmalte após o clareamento, mas relataram que essa redução foi minimizada nas amostras que receberam tratamento com os agentes clareadores que continham adição de cálcio 10 .…”

Section: Discussionunclassified

“…A literatura sugere que o uso indiscriminado dos agentes clareadores poderia resultar em poros, erosões, aumento da rugosidade superficial, redução dos níveis de cálcio e fosfato e diminuição da microdureza do esmalte dental, porém as consequências causadas pelos agentes clareadores ainda não estão totalmente esclarecidas, o que gera contestações 10 .…”

Section: Introductionunclassified

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Efeito do uso de agentes clareadores com cálcio na microdureza do esmalte dental

Gruber

Colli

Muniz

et al. 2018

Rev. da Fac. de Odontologia, UPF

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IntroduçãoAo longo das últimas décadas, há uma busca crescente por melhores condições estéticas e tratamentos clareadores, que se mostram eficazes, seguros e com bons resultados 1 . O clareamento dental é a técnica menos invasiva e mais conservadora, porém pode apresentar algumas desvantagens, como sensibilidade, ulcerações nos tecidos moles e, por vezes, toxicidade 2 . Portanto, o profissional deve ter experiência com o mecanismo de ação e conhecimento da segurança biológica dos agentes clareadores, para poder indicá-los de forma correta e orientar seus pacientes sobre o tratamento. Existem várias técni-cas de clareamento, como o clareamento caseiro com moldeira individual, o clareamento em consultório e o clareamento combinado, que associa as técnicas de consultório e caseira. As indicações e os tipos de clareamento estão relacionados às alterações de cor, que podem ser causadas por fatores extrínsecos ou intrínsecos 3,4 , e às características do paciente.Entretanto, estudos mostram que o peróxido de hidrogênio é um agente oxidante com alta capacidade de penetração no esmalte e na dentina devido ao seu baixo peso molecular 2 e, dependendo da técnica empregada, da quantidade de sessões, do tempo de exposição e da concentração do agente clareador, pode acarretar efeitos indesejáveis, como a sensibilidade e a alteração da morfologia do esmalte [5][6][7][8][9] . A literatura sugere que o uso indiscriminado dos

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“…The authors concluded that the presence of calcium in the clarifying gel positively influences the microhardness of human dental enamel. 25 It is worth noting that in laboratory experiments, dental enamel is exposed to the action of beverages for a definite period of time, without considering the quantity consumed in real conditions, the time and movements executed during deglutition, the oral conditions and salivary composition, and their remineralization potential. 3,18,20 Sports drinks should not be consumed indiscriminately.…”

Section: Discussionmentioning

confidence: 99%

Erosive Potential of Sports Beverages on Human Enamel “In Vitro”

Damo

Arossi

Silva

et al. 2018

Rev Bras Med Esporte

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Introduction: The low pH of sports drinks may cause tooth enamel demineralization. Objective: To measure Vickers hardness of human enamel exposed to sports drinks. Methods: Human molars were used to collect the enamel samples. Each sample had a test surface (exposed to the drinks) and a control surface (unexposed). The samples were exposed to isotonic drinks Gatorade and Powerade, and to maltodextrin drinks Malto Advanced and Malto Active, for 10 minutes every 12 hours over 30 days. The Vickers microhardness test was conducted with three indentations on each surface. The mean of the indentations within each group was considered in the statistical analysis. Sports drinks variables were analyzed with ANOVA/Tukey (p≤0.01). The independent t-test was used in the comparison between the control and test surfaces of each drink (p ≤ 0.05). Results: Enamel exposure to Gatorade (p = 0.000) Malto Advanced (p = 0.000) and Malto Active (p = 0.000) was seen to significantly reduce microhardness, while the isotonic drink Powerade had no significant effect on enamel (p = 0.248). Conclusion: It was concluded that with the exception of the isotonic drink Powerade, all the sports drinks tested caused a reduction in the microhardness of human enamel. Evidence Level III; Therapeutic studies - Investigating the Results of Treatment.

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Influência Da Presença Do Cálcio Em Agentes Clareadores E Sua Relação Com a Microdureza Do Esmalte Dental Humano

Cited by 4 publications

References 4 publications

Influence of bleaching and desensitizing gel on bond strength of orthodontic brackets

Influence of bleaching and desensitizing gel on bond strength of orthodontic brackets

Efeito do uso de agentes clareadores com cálcio na microdureza do esmalte dental

Erosive Potential of Sports Beverages on Human Enamel “In Vitro”

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