Effect of different bleaching protocols on whitening efficiency and enamel superficial microhardness
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Effect of different bleaching protocols on whitening efficiency and enamel superficial microhardness

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Effect of different bleaching protocols on whitening efficiency and enamel superficial microhardness

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dc.contributor.author Mushashe, Amanda Mahammad es
dc.contributor.author Coelho, Beatriz-Serrato es
dc.contributor.author Garcia, Paula-Pontes es
dc.contributor.author Rechia, Bruna-Cristina-do Nascimento es
dc.contributor.author da Cunha, Leonardo Fernandes es
dc.contributor.author Correr, Gisele Maria es
dc.contributor.author Gonzaga, Carla Castiglia es
dc.date.accessioned 2018-11-28T12:33:46Z
dc.date.available 2018-11-28T12:33:46Z
dc.date.issued 2018 es
dc.identifier.uri http://hdl.handle.net/10550/68110
dc.description.abstract Tooth bleaching is a popular aesthetic treatment to modify the color of teeth. Despite the extensive literature concerning the subject, there is still no consensus regarding the application mode of the different bleaching agents and their effect on enamel. Therefore, this study evaluated the influence of different bleaching protocols on whitening efficiency and enamel superficial hardness. Bovine enamel fragments were embedded in acrylic resin and wet-sanded to obtain a flat buccal surface. The specimens were then randomly divided into 6 groups (n=10), based on the bleaching material [HP Maxx 35% (35% hydrogen peroxide), HP Blue 35% (35% hydrogen peroxide + Ca) and Whiteness Perfect 10% (10% carbamide peroxide)] and application mode (3 applications of 15 min, 1 application of 45 min, 1 application of 1h30 or 1 application of 3h30). The color and superficial hardness were assessed before and after bleaching. The color was assessed by means of a digital spectrophotometer, using CIELab parameters. Vickers hardness was determined using a load of 200g for 10s. Data were statistically analyzed by one-way ANOVA with repeated measures and Tukey?s test (? = 0.05). Concerning the color alteration, the groups were similar to each other, except for at-home bleaching protocols, which were statistically different from each other. Similarly, there was a reduction in hardness values comparing the initial and final periods, with lowest final hardness for the at-home bleaching protocol group applied for 3h30. It can be concluded that the bleaching protocols influenced the final color and enamel surface hardness, evidencing that lower gel concentrations applied for longer periods promoted greater variation in color and lower final hardness. es
dc.source Mushashe, Amanda Mahammad ; Coelho, Beatriz-Serrato ; Garcia, Paula-Pontes ; Rechia, Bruna-Cristina-do Nascimento ; da Cunha, Leonardo Fernandes ; Correr, Gisele Maria ; Gonzaga, Carla Castiglia. Effect of different bleaching protocols on whitening efficiency and enamel superficial microhardness. En: Journal of Clinical and Experimental Dentistry, 10 8 2018: 772-775 es
dc.title Effect of different bleaching protocols on whitening efficiency and enamel superficial microhardness es
dc.type info:eu-repo/semantics/article en
dc.type info:eu-repo/semantics/publishedVersion en
dc.subject.unesco UNESCO::CIENCIAS MÉDICAS es
dc.identifier.doi 10.4317/jced.54967 es

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