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(Reference retrieved automatically from SciELO through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Effect of Dental Pigmentation Intensity on the Transenamel and Transdentinal Penetration of Hydrogen Peroxide

Full text
Author(s):
Janaina Cardoso Moreira [1] ; Marjorie de Oliveira Gallinari [2] ; Vanessa Rahal [3] ; Ticiane Cestari Fagundes [4] ; Paulo Henrique dos Santos [5] ; Marcia Regina de Moura [6] ; André Luiz Fraga Briso [7]
Total Authors: 7
Affiliation:
[1] Univ Estadual Paulista - Brasil
[2] Univ Estadual Paulista - Brasil
[3] Univ Estadual Paulista - Brasil
[4] Univ Estadual Paulista - Brasil
[5] Univ Estadual Paulista - Brasil
[6] Univ Estadual Paulista - Brasil
[7] Univ Estadual Paulista - Brasil
Total Affiliations: 7
Document type: Journal article
Source: Brazilian Dental Journal; v. 27, n. 4, p. 399-403, 2016-08-00.
Abstract

Abastract This study aimed to evaluate the transenamel and transdentinal penetration of hydrogen peroxide (H202) applied to bovine teeth pigmented with black tea at different intensities. The following groups were formed DW: immersion in distilled water; BT100: immersion in an infusion of 1.6 g of black tea per 100 mL distilled water; BT10: immersion in an infusion of 1.6 g black tea per 10 mL distilled water. All groups were immersed for 6 days. To quantify the penetration of H202, the specimens were placed in artificial pulp chambers (APCs) and subjected to bleaching treatment with 38% H2O2 once per week for 3 weeks. After bleaching treatment, the acetate buffer solution of APCs with peroxidase enzyme was evaluated in a reflection spectrophotometer. The transenamel and transdentinal penetration of H2O2 and the L* values obtained at T1, T2 and T3 were subjected to Kruskal-Wallis and Friedman statistical tests. At T1, the H2O2 diffusion in DW was higher than that in BT100 and BT10. At the other evaluation times, the penetration values in BT100 and BT10 increased and remained similar. The L* values increased significantly in all groups at T1. At T2, the L* values were higher in DW, while the values in BT100 and BT10 were similar to each other. At the end of the experiment, BT10 showed the lowest L* values. The pigmentation level did not affect the penetration of H2O2 through the enamel and dentin and the bleaching agent effectively changed the color of the teeth. (AU)

FAPESP's process: 15/01366-4 - Influence of the bleaching agents compositions in inflammation and neuropeptide expression after bleaching
Grantee:André Luiz Fraga Briso
Support Opportunities: Regular Research Grants
FAPESP's process: 14/11748-9 - Assessment of the effect of the dental pigmentation intensity in the trans-enamel and trans-dentinal penetration of hydrogen peroxide
Grantee:Janaina Cardoso Moreira
Support Opportunities: Scholarships in Brazil - Master