Effects of Internal Bleaching on the Adhesion of Glass-Fiber Posts
Paulo E. de Oliveira Moreira1, Lucianne S. Pamplona1, Gláucia C. R. Nascimento1, Renata A. Esteves2, Oscar F. Pessoa3, Cecy M. Silva1, *
Identifiers and Pagination:Year: 2015
First Page: 375
Last Page: 379
Publisher ID: TODENTJ-9-375
Article History:Received Date: 25/8/2015
Revision Received Date: 11/9/2015
Acceptance Date: 29/9/2015
Electronic publication date: 10/12/2015
Collection year: 2015
open-access license: This is an open access article licensed under the terms of the (https://creativecommons.org/licenses/by/4.0/legalcode), which permits unrestricted, noncommercial use, distribution and reproduction in any medium, provided the work is properly cited.
Objective: We evaluated the effects of internal bleaching on the adhesion of glass-fiber posts (GFPs) luted with different resin cements. Methods: Forty extracted human single-root teeth were endodontically treated and divided into four groups (n=10): G1- conventional resin cement (CRC); G2- self-adhesive resin cement (SARC); G3- bleaching + CRC; and G4- bleaching + SARC. Specimens were sectioned transversally into three slices to perform the push-out test at the coronal, middle and apical regions of the root canals. Data were analyzed using analysis of variance and Tukey's test (p<0.05).Results:The push-out bond strength of GFPs luted with SARC after bleaching (G4) was significantly lower than that of the other groups (p<0.001). We found no statistically significant differences in push-out bond strength among the other groups. Significance: Internal bleaching reduced the adhesion of GFPs luted with SARC. The adhesion of GFPs luted with CRC was not decreased after bleaching.