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Proceedings Paper

Green LED associated to 20% hydrogen peroxide for dental bleaching: nanomorfologic study of enamel by scanning electron microscopy
Author(s): Susana C. P. S. Oliveira; Gustavo M. P. Santos; Juliana S. C. Monteiro; Fernando J. P. Sampaio; Maria F. M. Gesteira; Fátima A. A. Zanin; Marcos A. V. Santos; Antônio L. B. Pinheiro
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Paper Abstract

Dental bleaching is a much requested procedure in clinical dental practice and widely related to dental esthetics. The literature is contradictory regarding the effects of bleaching agents on the morphology and demineralization of enamel after bleaching. The aim of this study was to analyze in vitro by scanning electron microscopy (SEM) the effect of hydrogen peroxide at 20% at neutral pH, cured by the green LED, to evaluate the action of these substances on dental enamel. We selected 15 pre-molars, lingual surfaces were sectioned and previously marked with a central groove to take the experimental and control groups on the same specimen. The groups were divided as follows. The mesial hemi-faces were the experimental group and distal ones as controls. For morphological analysis were performed 75 electron micrographs SEM with an increase of X 43, X 220 and X 1000 and its images were evaluated by tree observers. Was also performed quantitative analysis of the determination of the surface atomic composition of the samples through microanalysis with the aid of scanning electron microscopy. The use of hydrogen peroxide at a concentration of 20% at photoactivated green LED showed no significant changes in mineral composition of the samples or the dental morphological structure of the same when compared to their controls, according to the study protocol.

Paper Details

Date Published: 5 March 2013
PDF: 6 pages
Proc. SPIE 8569, Mechanisms for Low-Light Therapy VIII, 85690M (5 March 2013); doi: 10.1117/12.2004026
Show Author Affiliations
Susana C. P. S. Oliveira, Univ. Federal da Bahia (Brazil)
National Institute of Optics and Photonics (Brazil)
Gustavo M. P. Santos, Gonçalo Muniz Institute (Brazil)
Juliana S. C. Monteiro, Univ. Federal da Bahia (Brazil)
National Institute of Optics and Photonics (Brazil)
Fernando J. P. Sampaio, Univ. Federal da Bahia (Brazil)
National Institute of Optics and Photonics (Brazil)
Maria F. M. Gesteira, Univ. Federal da Bahia (Brazil)
National Institute of Optics and Photonics (Brazil)
Fátima A. A. Zanin, Univ. Federal da Bahia (Brazil)
National Institute of Optics and Photonics (Brazil)
Brugnera & Zanin Institute (Brazil)
Marcos A. V. Santos, Gonçalo Muniz Institute (Brazil)
Antônio L. B. Pinheiro, Univ. Federal da Bahia (Brazil)
National Institute of Optics and Photonics (Brazil)
Brugnera & Zanin Institute (Brazil) and Camilo Castelo Branco Univ. (Brazil)


Published in SPIE Proceedings Vol. 8569:
Mechanisms for Low-Light Therapy VIII
Michael R. Hamblin; Juanita Anders; James D. Carroll; Praveen R. Arany, Editor(s)

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