Effect of Sodium Ascorbate and the Time Lapse before Cementation after Internal Bleaching on Bond Strength between Dentin and Ceramic

Abstract

After NVB, adhesive luting to dentin is recommended after 7 days if sodium ascorbate has been applied prior to dentin hybridization.

Effect of Two-minute Application of 35% Sodium Ascorbate on Composite Bond Strength following Bleaching

“…Other studies also showed consistent and more favorable outcomes of antioxidant treatment on enamel substrate compared with those that utilized dentin substrate. 16,18,34 The different structure and different bonding mechanisms between the two substrates could explain the disagreement in these findings. However, while the bleaching agent is applied on the enamel layer, it travels through enamel pores and reaches dentin, where most of the chemical reaction of the bleaching process takes place.…”

The Effects of Antioxidant Application and Time Factor on Fiber Post Bonding to Root Dentin after Intracoronal Bleaching

“…Int Dent Res 2018;8(1): 22-27. posts have been recommended (8,9). However, the data in the literature is contradictory, and there is no consensus about their effectiveness (10)(11)(12)(13).…”

O ascorbato de sódio promove a resistência de união após técnicas de clareamento dental?

“…It was suggest that the amount of residual oxygen is proportional to the reduction in bond strength, as well as the reduced length and frequency of resin tags in the bleached substrate [28]. Also, it has been reported that when SA was continuously refreshed and the enamel surface was agitated it can enhance the antioxidant effect on the bleached substrate [8,34]. Freire et al [40] recommended application of 25% SA solution for 5 minutes when the 35% hydrogen peroxide was used for bleached teeth.…”

“…However, few studies are reported in the literature about the interaction of SA with the soft and hard tissues of the oral environment. May et al [34] applied the 10% SA on unbleached dentin to verify other possible effects besides reducing the residual bleaching agent, and observed that application of SA was not interfere with unbleached teeth, indicating that this substance only acts by reducing the residual free radicals on the bleached structure. On other hand, Briso et al [28] verified that the use of 10% SA alone led to limited resin tags and hybrid layer, although their formations remained continuous and homogeneous across the adhesive interface.…”

“…Perhaps, the different kinetics degradation of bleaching agents type may influence the antioxidant ability of SA. Studies that did not observe the effectiveness of AS used high concentrations of peroxide or long time exposure of bleaching agent [32][33][34][35][36].…”