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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.)

Effect of Bleaching Treatment and Reduced Application Time of an Antioxidant on Bond Strength to Bleached Enamel and Subjacent Dentin

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Author(s):
Lima, Adriano Fonseca [1] ; da Silva Fonseca, Fabricio Maurilio ; Freitas, Marcela Santiago ; Muniz Palialol, Alan Rodrigo ; Baggio Aguiar, Flavio Henrique [1] ; Marchi, Giselle Maria [1]
Total Authors: 6
Affiliation:
[1] Univ Estadual Campinas, Piracicaba Sch Dent, Dept Restorat Dent, BR-13414903 Piracicaba, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: Journal of Adhesive Dentistry; v. 13, n. 6, p. 537-542, DEC 2011.
Web of Science Citations: 9
Abstract

Purpose: To evaluate the influence of bleaching on bond strength to enamel and subjacent dentin, and to determine whether a reduced application time (1 min) of the antioxidizing agent can obviate the compromised bond strength after bleaching. Materials and Methods: One hundred twelve bovine incisors were obtained, and the enamel and dentin surfaces were standardized to a thickness of 1 mm. The specimens were divided into two control groups (enamel and dentin without treatment) and 12 experimental groups (n = 10), based on the concentration of bleaching agents (carbamide peroxide 16% and hydrogen peroxide 35%), time interval between bleaching and restorative procedures (24 h; 24 h + sodium ascorbate (SA) 10%/1 min; 14 days), and substrate (enamel or dentin). All samples were submitted to the bleaching treatment on enamel. After the stipulated interval, a microshear test was performed. Results: The bleaching treatment compromised the bond strength to the enamel when the restoration was performed 24 h after the end of bleaching. The bond strength to dentin was not affected by bleaching. Conclusions: The SA 10% application for 1 min obviates the detrimental effect of bleaching on bond strength. The bleaching performed on enamel does not affect the bond strength to the subjacent dentin. (AU)

FAPESP's process: 09/08992-7 - Effect of direct and trans-dentinal application of low level laser on odontoblast cells exposed to bleaching agents
Grantee:Adriano Fonseca de Lima
Support Opportunities: Scholarships in Brazil - Doctorate