Impact of Intracoronal Dentin Treatment Prior to Bleaching on Bond Strength of Restorative Materials

Zanconato-Carvalho, Erica Moreno; Bruniera, João Felipe Bonatto; Faria, Natália Spadini de; Colucci, Vivian; Messias, Danielle Cristine Furtado

doi:10.1590/0103-6440201302441

Cited by 4 publications

(1 citation statement)

References 20 publications

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“…Although no differences could be noted ultrastructurally at fourteen days after bleaching, the 25% and 35% HP pre‐etched groups did not reach BS values similar to those of the control group (as observed for nonetched dentin). Data reported in the literature have shown no differences or even lower dentin bond strengths when phosphoric acid was applied to dentin prior to intracoronal bleaching (Batalha‐Silva et al, ; Zanconato‐Carvalho, Bruniera, Faria, Colucci, & Messias, ).…”

Section: Discussionmentioning

confidence: 98%

Dentin bond strength and nanoleakage of the adhesive interface after intracoronal bleaching

Cavalli

Sebold

Shinohara

et al. 2018

Microscopy Res & Technique

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This study evaluated dentin bond strength (BS) and nanoleakage of non- and pre-etched dentin immediately (T ,), 7 days (T ), and 14 days (T ) after bleaching. Bovine incisors (150) were selected and half of them submitted to intrapulpal dentin etching (e). Non- and pre-etched dentin were subjected to the following (n = 15): no bleaching/control (C); 35% carbamide peroxide (CP); 35% hydrogen peroxide (35% HP); 25% hydrogen peroxide (25% HP); and sodium perborate (SP). Bleaching agents were applied to the pulp chamber four times within a 72-h interval. Afterwards, pulp chamber dentin was prepared for the BS test at different evaluation times (n = 5): T , T , and T . Composite blocks were built on pulp chamber and sectioned in slices. Slices were reduced to an hour-glass shape with a cross-sectional area of 0.8 mm and submitted to microtensile BS test. Two additional specimens for each group were prepared for nanoleakage evaluation by transmission electron microscopy (TEM). Results were analyzed by ANOVA (two-way) and Dunnett's test (p < .05). BS decreased immediately after intracoronal bleaching for both sound and pre-etched dentin (p < .05). At T , the BS of non-etched bleached dentin increased for all groups, whereas the pre-etched SPe group presented BS similar to the Ce. Nanoleakage within the hybrid layer was perceptible immediately after bleaching, although a decrease in nanoleakage was observed for all groups at T . Adhesive restorations should be performed 7-14 days after bleaching, according to the bleaching agent used. Intracoronal bleaching should be performed preferably with sodium perborate if previous dentin etching is applied.

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Section: Discussionmentioning

confidence: 98%