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Influence of simplified, higher-concentrated sodium ascorbate application protocols on bond strength of bleached enamel

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Influence of simplified, higher-concentrated sodium ascorbate application protocols on bond strength of bleached enamel

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dc.contributor.author Coppla, Fabiana-Madalozzo es
dc.contributor.author Freire, Andrea es
dc.contributor.author Bittencourt, Bruna es
dc.contributor.author Armas Vega, Ana del Carmen es
dc.contributor.author Banderas-Benítez, Valeria-Elizabeth es
dc.contributor.author Calixto, Abraham-Lincoln es
dc.contributor.author Dourado Loguercio, Alessandro es
dc.date.accessioned 2019-03-07T11:34:42Z
dc.date.available 2019-03-07T11:34:42Z
dc.date.issued 2019 es
dc.identifier.citation Coppla, Fabiana-Madalozzo ; Freire, Andrea ; Bittencourt, Bruna ; Armas Vega, Ana del Carmen ; Banderas-Benítez, Valeria-Elizabeth ; Calixto, Abraham-Lincoln ; Dourado Loguercio, Alessandro. Influence of simplified, higher-concentrated sodium ascorbate application protocols on bond strength of bleached enamel. En: Journal of Clinical and Experimental Dentistry, 11 1 2019: 21-26 es
dc.identifier.uri http://hdl.handle.net/10550/69430
dc.description.abstract Bleaching procedures performed before restorative procedures, due to the oxygen released, affects the quality of bonding restorations. The application of an lower-concentrated antioxidant for one-hour or more can reversal the compromised bonding to bleached enamel, but it was not effective according to the bleaching concentrations applied. The aim of the present study was to evaluate simplified protocol of higher-concentrated sodium ascorbate (35%SA) in bond strength values of enamel bleached with 10%, 16%, 22% carbamide peroxide (CP) or 35% hydrogen peroxide (HP). Three hundred and forty enamel surfaces of 85 human third molars were used, divided into 17 groups (n=20), according to the following groups: control = no bleaching and no ascorbic acid application; bleaching (CP10%, CP16%, CP22% at-home and HP 35% in-office) and 35%SA application (no application; 35%SA applied twice for 1-min each [SA2×1], twice for 5-min each [SA2×5] and; twice for 10-min each [SA2×10]). After that, adhesive was applied and composite cylinders were made with Filtek Z350 composite. Microshear test was performed in a universal testing machine. BS values were statistically evaluated using ANOVA and Tukey?s and Dunnet?s (against control) tests, with 5% level of significance. All bleaching concentrations significantly decrease the enamel bond strength results when compared to control group (p<0.05). More concentrated PC (PC22% and PH35%) showed lower enamel bond strength results when compared to lower concentrated PC (PC10% and PC16%; p<0.05). A significant increase of the enamel bond strength results were only observed when SA2×5 and SA2×10 were applied (p<0.05). The application of 35% sodium ascorbate for twice 5- and 10-min each was an efficient protocol to reverse the bond strength in bleached enamel at the same level as the no bleaching enamel, independently of the bleaching concentration used. es
dc.title Influence of simplified, higher-concentrated sodium ascorbate application protocols on bond strength of bleached enamel es
dc.type journal article es_ES
dc.subject.unesco UNESCO::CIENCIAS MÉDICAS es
dc.identifier.doi 10.4317/jced.55153 es
dc.type.hasVersion VoR es_ES

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