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- Title
Microabrasion effect on enamel susceptibility to penetration of hydrogen peroxide: an experimental and computational study.
- Authors
Costa, Daiane; Meireles, Agnes; Ferreira, Janaína Luciana; Alcântara, Polyana; Torres, Libardo Andrés; Câmara, João Victor Frazão; Pierote, Josué Junior; Canuto, Marcus Henrique; Araújo, Cintia Tereza
- Abstract
To evaluate in vitro transenamel/transdentinal of penetration of H2O2 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% H2O2). From artificial pulp chambers, the H2O2 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 H2O2 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 H2O2 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.
- Subjects
HYDROGEN peroxide; DENTAL enamel microabrasion; DENTAL enamel; CARBAMIDE peroxide; DENTAL pulp cavities
- Publication
Odontology, 2021, Vol 109, Issue 4, p770
- ISSN
1618-1247
- Publication type
Article
- DOI
10.1007/s10266-021-00598-0