Graded changes in enamel component volumes resulted from a short tooth bleaching procedure

Ferreira, Artemisa Fernanda Moura; Ramos‐Perez, Flávia Maria de Moraes; Júnior, Francisco de Assis Limeira; Moura, Mirella de Fátima Liberato de; Sousa, Frederico Barbosa de

doi:10.1016/j.archoralbio.2016.01.016

Cited by 8 publications

(3 citation statements)

References 19 publications

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“…Among the previous studies related to whitening agents, the effect of whitening agents on tooth surfaces has been demonstrated in several studies. However, studies on the whitening effect, bond strength with teeth, and effect on the surface change of resin brackets upon application of whitening agents to discolored resin brackets owing to the surrounding oral environment are lacking [18][19][20]. Therefore, this study aimed to investigate the whitening effect on the surface of resin brackets by applying different concentrations of HP, a major component of whitening agents, to discolored resin brackets, to comprehensively evaluate the SBS between the enamel and resin brackets, microhardness, and microstructural aspects of the bracket surface following whitening treatment, and determine the optimal HP concentration for performing whitening in patients undergoing orthodontic treatment with resin brackets without compromising the surface properties of the brackets.…”

Section: Discussionmentioning

confidence: 99%

Effect of the concentration of hydrogen peroxide on the color and surface of the resin bracket

Park

Lee

Kim

et al. 2023

Preprint

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Objectives. This study aimed to evaluate the whitening effect, shear bond strength (SBS) with the enamel surface, microhardness, and microstructure of discolored resin brackets following whitening treatment with various concentrations of hydrogen peroxide (HP). Materials and methods. Resin brackets were bonded to the enamel surface and discolored with a curry solution. Control (distilled water) and experimental solutions of 8.7, 17.5, and 35% HP were applied to the discolored resin brackets for 15 min. Resin brackets were then stored in distilled water for a week by repeating this whitening process thrice. The whitening efficacy was evaluated according to ISO 28399:2011. The SBS was measured using a universal testing machine. The microhardness and microstructure of the resin brackets were observed using a microhardness tester and field-emission scanning electron microscopy (FE-SEM). All the results were analyzed using a one-way analysis of variance analysis and Tukey’s post-hoc test (p=0.05). Results. All the experimental groups demonstrated a significant whitening effect on the discolored resin brackets compared to the control group (p<0.05). In particular, 35% HP showed faster color changes than the other groups (p<0.05). The microhardness of the resin bracket was lower in 35% HP than in the control group (p<0.05). FE-SEM analysis revealed no significant difference between groups. Conclusions. HP application at > 8.7% and < 17.5% concentrations whitens discolored resin brackets while not deteriorating the SBS, surface hardness, and microstructure. Clinical relevance. Dental clinicians can safely use HP within the recommended range to achieve effective aesthetic outcomes without compromising bracket performance and durability.

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Section: Discussionmentioning

confidence: 99%

Effect of the concentration of hydrogen peroxide on the color and surface of the resin bracket

Park

Lee

Kim

et al. 2023

Preprint

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“…Ferreira A.F.M. et al [31] tested the hypothesis that the contents of enamel components (mineral, organic and water content, as well as the permeability of tooth enamel) change after a short whitening procedure from the outer layer to the inner layer of tooth enamel. Changes in enamel composition were significant only in the outermost layers of enamel.…”

Section: Discussionmentioning

confidence: 99%

Effect of the Teeth Whitening Procedure on the Mineral Composition of Oral Fluid

Ryskina,

Magsumova,

Postnikov

et al. 2023

Dentistry Journal

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The basis of modern tooth whitening systems is the use of a whitening gel, which usually contains hydrogen peroxide or carbamide peroxide. The study included 81 patients aged 22 to 35 years with a tooth color A2 and a darker color on the Vita Classic scale. The purpose of our research was to identify a new approach to whitening teeth to improve safety and gentleness. To perform this, we assessed the effect of the tooth whitening procedure on the mineral composition of the oral fluid. A new approach to the teeth whitening procedure was to use a mouth retractor and a tool for aspirating the whitening gel, which we developed. Before the procedure, a protective film-forming aerosol, which included sodium ascorbate, was applied. After the tooth whitening procedure, the enamel was remineralized with a sealing liquid for 14 days. The concentrations of calcium and phosphorus in the oral fluid were determined using a spectrophotometer with a set of reagents (Human). The results obtained indicate that the new approach to the teeth whitening procedure contributed to less pronounced changes in the concentrations of calcium (+29.07, p < 0.001) and phosphorus (−14%, p < 0.001) in the oral fluid immediately after the procedure and in combination with the standard procedure for teeth whitening; immediately after this procedure, the calcium concentration increased by 74.4% (p < 0.001), and the phosphorus concentration decreased by 23.07% (p < 0.001). The use of remineralizing agents led to a faster recovery of the initial levels of calcium and phosphorus in the oral fluid.

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“…However, this problem can be treated through the bleaching procedure, which can turn it minimal or even return the color to the tooth (FERREIRA, 2016). Nowadays, bleaching agents with hydrogen peroxide, as their active substance, have been chosen in clinical field because their action mechanism consists of a strong oxidation reaction through the formation of free radicals, reactive oxygen molecules and peroxide anions of hydrogen (CHNG, 2002;EIMAR, 2012;XU, 2011).…”

Section: Introductionmentioning

confidence: 99%

Influence of Post-Bleaching Time Intervals Using 37% Carbamide Peroxide on Dental Substrate Adhesion

Yamakami

Faraoni

Caslini

et al. 2017

Iniciac cient Cesumar

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ABSTRACT:The aim of this study was to evaluate the influence of post-bleaching time intervals using 37% carbamide peroxide on dental substrate adhesion. Fifty bovine incisors were sectioned in two groups of 4X4 mm standard blocks to obtain 50 specimens in each group (n=50). In fifty blocks, the dentin (D) was analyzed and in the other 50 the enamel (E). Blocks were subjected to bleaching treatment and restored with Single Bond/ z250 according to post-bleaching time intervals (0, 7, 14 and 21 days : 8.40 (0.87). Data were submitted to ANOVA and Tukey (p< 0.05) tests. The bond strength value for the enamel was statistically higher than the dentin, and both were lower than the control group that had similar results after 21 days post-bleaching. In dentin group, the control showed superior bond strength and was statistically different in relation to other times. It was concluded that bleaching had negative influence on adhesion. Therefore it is necessary to wait, at least, 21 days after bleaching to restore the enamel. KEYWORDS:Bleaching Agents; Peroxides; Dentin; Enamel. AVALIAÇÃO IN VITRO DA INFLUÊNCIA DE DIFERENTES INTERVALOS DE TEMPO PÓS-CLAREAMENTO COM PERÓXIDO DE CARBAMIDA 37% NA ADESÃO AO SUBSTRATO DENTALABSTRACT: O objetivo deste estudo foi avaliar a influência do peróxido de carbamida a 37% sobre a adesão dos substratos dentários em diferentes intervalos de tempo pós-clareamento. Cinquenta incisivos bovinos foram divididos em dois grupos de blocos padrão 4 x 4 mm para obter 50 espécimes de cada grupo (n = 50). Em cinquenta blocos, a dentina (D) foi analisada e nos outros 50 o esmalte (E). Os blocos foram submetidos ao tratamento de clareamento e restaurados com Single Bond/z250 de acordo com os intervalos de tempo pós-clareamento (0, 7, 14 e 21 dias). Após vinte e quatro horas os corpos de prova preparados com adesivo/resina foram submetidos ao teste de resistência ao cisalhamento (SBS) em uma máquina universal de ensaio. As médias (Mpa) e seus respectivos desvios padrão foram: E -controle: 31,89 (2,39); T0: 19,07 (2,00); T7: 24,97 (4,89); T14: 29,71 (4,89); T21: 40,91 (4,75) e D -controle: 18,90 (3,64); T0: 2,22 (0,41); T7: 3,79 (0,75); T14: 5,95 (0,79); T21: 8,40 (0,87). Os dados foram submetidos à ANOVA e ao teste de Turkey (p <0,05). O valor da resistência de união para o esmalte foi estatisticamente superior a dentina e ambos foram inferiores ao grupo controle que apresentou resultados semelhantes após 21 dias pós-branqueamento. O grupo controle (D) apresentou valores de resistência de união superior e estatisticamente diferente em relação aos outros tempos. Concluiu-se que o clareamento teve influência negativa sobre a adesão. Portanto, tornar-se-á necessário aguardar, pelo menos, 21 dias após o clareamento para restaurar o esmalte.

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Graded changes in enamel component volumes resulted from a short tooth bleaching procedure

Abstract: Changes in enamel composition after a short bleaching procedure followed a gradient within component volumes (mineral loss>organic gain>water gain>decrease in permeability) and decreased from the enamel surface inward.

Cited by 8 publications

References 19 publications

Effect of the concentration of hydrogen peroxide on the color and surface of the resin bracket

Effect of the concentration of hydrogen peroxide on the color and surface of the resin bracket

Effect of the Teeth Whitening Procedure on the Mineral Composition of Oral Fluid

Influence of Post-Bleaching Time Intervals Using 37% Carbamide Peroxide on Dental Substrate Adhesion

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