Microabrasion Effect on Enamel Susceptibility to Penetration of Hydrogen Peroxide: an Experimental and Computational Study

Overview

Journal Odontology

Specialty Dentistry

Date 2021 Mar 12

PMID 33709251

Authors

Daiane Costa

Agnes Meireles

Janaina Luciana Ferreira

Polyana Alcantara

Libardo Andres Torres

Joao Victor Frazao Camara

Josue Junior Pierote

Marcus Henrique Canuto

Cintia Tereza Araujo

Affiliations

Soon will be listed here.

Abstract

To evaluate in vitro transenamel/transdentinal of penetration of HO after microabrasive. Computational models were performed to verify peroxide penetration and evaluate if geometric modifications could affect in vitro results. Enamel/dentin blocks from bovine incisors were prepared and randomly divided into groups (n = 15) according with abrasive (35% phosphoric acid and pumice or 6.6% hydrochloric acid and silica) and bleaching agents (16% carbamide peroxide and 35% HO). From artificial pulp chambers, the HO concentration was measured and SEM was used for surface morphology. Numerical models were performed (Abaqus® v6.12) modifying slightly enamel/dentin thickness based on experimental data. All groups presented HO penetration, although no significant difference was noted between the control and experimental groups (p > 0.05). The numerical analysis demonstrated the role of dental tissue thickness in the HO penetration. Microabrasion is recommended as its association with bleaching procedures and small modifications in thicknesses of enamel/dentin can cause substantial changes in HP penetration. Such diffusion aspect is clinically relevant for the bleaching procedures since very thin enamel could present more peroxide propagation through dental tissues.

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