Analysis of the Chemical Modification of Dental Enamel Submitted to 35% Hydrogen Peroxide "In-Office" Whitening, with or without Calcium.

Autor: Moreira RF; School of Dentistry, UERJ, Rio de Janeiro, RJ, Brazil., Santos FP; School of Dentistry, UERJ, Rio de Janeiro, RJ, Brazil., Santos EA; School of Dentistry, UERJ, Rio de Janeiro, RJ, Brazil., Dos Santos RS; Institute of Physics, UERJ, Rio de Janeiro, RJ, Brazil., Dos Anjos MJ; Institute of Physics, UERJ, Rio de Janeiro, RJ, Brazil., de Miranda MS; School of Dentistry, UERJ, Rio de Janeiro, RJ, Brazil.
Jazyk: angličtina
Zdroj: International journal of dentistry [Int J Dent] 2017; Vol. 2017, pp. 4646789. Date of Electronic Publication: 2017 Aug 28.
DOI: 10.1155/2017/4646789
Abstrakt: Purpose: The purpose of this study was to evaluate changes in calcium and phosphorus content in dental enamel when subjected to "in-office" whitening for an extended time by using a 35% hydrogen peroxide solution, with and without calcium.
Materials and Methods: 10 human teeth, from which the roots had been removed, were embedded in epoxy resin, and their surfaces were smoothed. The specimens were divided into two groups; in group 1, a whitening solution without calcium was used, while in group 2, the solution included calcium. Each specimen was evaluated at 6 different points before the bleaching treatment, and these points were reassessed after each session. A total of five sessions were carried out. Concentrations of calcium and phosphorus were measured by using the technique of X-ray fluorescence.
Results: After performing a statistical analysis, it was found that there was no statistically significant loss of calcium and phosphorus during the whitening treatment, and the groups showed no statistical differences.
Conclusion: Excessive use of hydrogen peroxide, with or without calcium, causes no loss of calcium and phosphorus.
Databáze: MEDLINE
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