Residual Effect of Sodium Hypochlorite on Pulp Chamber Dentin Adhesion


Submitted: 6 July 2020
Accepted: 12 October 2020
Published: 8 February 2021
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Aim: This study has evaluated the residual effect of NaOCl on resin-pulp chamber dentin bond strength after 7 and 14 days, using a three-step etch-and-rinse adhesive system. 

Methodology: Forty pulp chamber dentin from bovine incisors crowns were randomly allocated to one of the following groups: G1, immersion in 0.9% saline solution for 30 minutes (control); G2, immersion in 5.25% NaOCl for 30 minutes; G3, immersion in 5.25% NaOCl for 30 minutes and stored for 7 days; and G4, immersion in 5.25% NaOCl for 30 minutes and stored for 14 days. After restoration, the dentin/resin interface was tested by microtensile bond strength and failure mode was analyzed by Scanning Electron Microscopy. Data were analyzed by ANOVA followed by Tukey. 

Results: G1 had higher bond strength than the rest of the groups. There were no statistically significant differences among G2, G3, and G4 (p>0.05). 

Conclusions: The adverse effect of NaOCl on bond strength persisted even after 14 days after exposure.


Supporting Agencies

CAPES [grant number 13350-13-7].

Bronzato, J. D., Correa, A. C. P., Gomes, B. P. F. de A., & Ferraz, C. C. R. (2021). Residual Effect of Sodium Hypochlorite on Pulp Chamber Dentin Adhesion. Giornale Italiano Di Endodonzia, 35(1). https://doi.org/10.32067/GIE.2021.35.01.05

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