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

Transenamel and Transdentinal Penetration of H2O2 in Restored Bovine Teeth

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Author(s):
Fraga Briso, Andre Luiz [1] ; Goncalves, Rafael Simoes [2] ; de Azevedo, Fernanda Almeida [3] ; Gallinari, Marjorie de Oliveira [3] ; dos Santos, Paulo Henrique [4] ; Fagundes, Ticiane Cestari [1]
Total Authors: 6
Affiliation:
[1] Univ Estadual Paulista UNESP, Aracatuba Dent Sch, Dept Restorat Dent, Sao Paulo - Brazil
[2] Univ Sao Paulo, Bauru Sch Dent, Dept Restorat Dent, Bauru - Brazil
[3] Univ Estadual Paulista UNESP, Aracatuba Dent Sch, Sao Paulo - Brazil
[4] Univ Estadual Paulista UNESP, Aracatuba Dent Sch, Dept Dent Mat & Prosthodont, Sao Paulo - Brazil
Total Affiliations: 4
Document type: Journal article
Source: Journal of Adhesive Dentistry; v. 17, n. 6, p. 529-534, 2015.
Web of Science Citations: 0
Abstract

Purpose: To quantify hydrogen peroxide (H2O2) penetration into restored bovine teeth subjected to whitening treatment. Materials and Methods: Seventy-five enamel/dentin disks were divided into 5 groups (n = 15): intact disks (G1); cavity preparation only (G2); conventional adhesive system and composite resin (G3); resin-modified glass-ionomer cement (G4); and self-etching adhesive only (G5). After 24 h, the disks were placed into artificial pulp chambers containing an acetate buffer solution, and the first whitening session was performed using a 35% H2O2 (hydrogen peroxide) product. The disks were submitted to 10,000 thermal cycles and then stored for 1 year in deionized water. After this period, a second whitening session was performed. After each whitening procedure, the buffer solutions were analyzed for optical density in a spectrophotometer to assess the amount of H2O2 that had diffused. ANOVA and Tukey's test were used to compare the different groups and a Student's t-test was used to compare the different times (p <= 0.05). Results: Prior to aging, group 2 had the highest penetration of H2O2; the other groups showed similar, lower penetration. After thermocycling and aging, all groups showed a significant increase in H2O2 penetration. The greatest penetration of H2O2 into the pulp chamber was found in groups 2 and 5. Conclusion: Aged restorations allowed greater H2O2 permeation through the tooth structure. (AU)

FAPESP's process: 10/17200-4 - Neurosensory analysis of tooth sensitivity occured during the home-bleaching
Grantee:Fernanda Almeida de Azevedo
Support Opportunities: Scholarships in Brazil - Scientific Initiation