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CC BY-NC-ND 4.0 · Eur J Dent 2021; 15(03): 433-439
DOI: 10.1055/s-0041-1725576
Original Article

Resistance against Erosive Challenge of Dental Enamel Treated with 1,450-PPM Fluoride Toothpastes Containing Different Biomimetic Compounds

Nayanna L. S. Fernandes
1   Programa de Pós-Graduação Stricto sensu em Odontologia, Universidade Federal da Paraíba, PB, Brazil
,
L. da Cunha Juliellen
2   Department of Morphology, Federal University of Paraíba, Centro de Ciências da Saúde, Brazil
,
F. B. de Oliveira Andressa
2   Department of Morphology, Federal University of Paraíba, Centro de Ciências da Saúde, Brazil
,
H. P. Paulo D’Alpino 
3   Faculdade de Ciências de Bauru, Departamento de Física, Universidade Estadual Paulista, Bauru, Sao Paolo, Brazil
,
C. Fábio Sampaio
1   Programa de Pós-Graduação Stricto sensu em Odontologia, Universidade Federal da Paraíba, PB, Brazil
4   Departamento de Clínica e Odontologia Social, Universidade Federal da Paraíba, Centro de Ciências da Saúde, Brazil
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Abstract

Objectives This in vitro study aimed to characterize the superficial and subsurface morphology of dental enamel treated with fluoridated gels containing different biomimetic compounds after erosive challenge.

Materials and Methods Bovine incisor teeth were sectioned to obtain enamel blocks (4 mm × 4 mm × 6 mm; n = 5) that were demineralized to create an artificial caries lesion and treated by pH cycling interspersed with exposure to fluoridated toothpaste slurries under agitation. During pH cycling (demineralization and remineralization for 2 and 22 hours, respectively) for 6 days, the enamel blocks were exposed to toothpaste slurries under agitation with one of the dental gels: Regenerate Enamel Science (NR-5 technology), Daily Regenerator Dental Clean (REFIX technology), and Sensodyne Repair & Protect (Novamin technology). The enamel blocks were subjected to an erosive challenge, immersed in 50% citric acid for 2 minutes, and then washed with plenty of distilled water. The surface and cross-sectional micromorphology were assessed using scanning electron microscope (SEM). The elemental analyses (weight percentage) were determined with an energy-dispersive X-ray spectroscopy (EDS).

Results Enamel treated with the product containing REFIX technology presented a smoother surface morphology compared to the other treatments. The higher resistance to the erosive challenge can be attributed to a silicon-enriched mineral layer formed on the enamel induced by the REFIX-based toothpaste. This was not observed in the specimens treated with the other technology-containing toothpastes.

Conclusion The REFIX technology seemed to be the most promising compared to the Novamin and NR-5 technologies. In addition to forming a surface mineralized layer, the enamel treated with REFIX technology associated with the pH cycling resisted a subsequent erosive challenge.

Keywords

enamel - dentin - tooth remineralization - toothpaste - scanning electron microscope


Publication History

Article published online:
26 May 2021

© 2021. European Journal of Dentistry. This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial-License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. (https://creativecommons.org/licenses/by-nc-nd/4.0/).

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