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Effect of finishing and polishing on surface roughness of composite resins after bleaching
Remote (Português (Brasil))

Keywords

Composite resins
Dental polishing
Tooth bleaching

How to Cite

1.
Bittencourt BF, Gomes GM, Trentini FA, Azevedo MR de, Gomes JC, Gomes OMM. Effect of finishing and polishing on surface roughness of composite resins after bleaching. Braz. J. Oral Sci. [Internet]. 2009 Dec. 31 [cited 2024 May 19];13(2):158-62. Available from: https://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8640918

Abstract

Aim: To evaluate the influence of finishing and polishing techniques on the surface roughness of two composite resins (CRs) subjected to bleaching procedure. Methods: Forty-eight CR specimens were divided into six groups (n=8). For G1 to G3, a microhybrid CR (Opallis; FGM) was used, and G4 to G6, received a nanohybrid CR (Brilliant NewLine; Coltène/Whaledent). All specimens were subjected to bleaching procedure with 35% hydrogen peroxide (two 45-min applications, with a 5-day interval). The surface roughness of all specimens was evaluated before and after the bleaching and/or finishing/polishing (Ra parameter) by a roughness meter. After bleaching, the groups were subjected to finishing and polishing procedures: G2 and G5 - felt discs + diamond pastes; and G3 and G6 - silicon rubber tips. The control groups (G1 and G4) had no finishing or polishing treatment after bleaching. Data were analyzed by ANOVA and Tukey’s posttest, and t test for paired samples (α=0.05). Results: bleaching treatment increased Ra values for the nanohybrid CR specimens, but both finishing/polishing techniques were able to reduce these values; for the microhybrid specimens, only finishing/polishing with silicon rubber tips decreased the roughness values. Conclusions: For both microhybrid and nanohybrid CRs, the silicon rubber tips were effective to reduce the surface roughness after bleaching procedure.
Remote (Português (Brasil))
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This work is licensed under a Creative Commons Attribution 4.0 International License.

Copyright (c) 2015 Bruna Fortes Bittencourt, Giovana Mongruel Gomes, Felipe Auer Trentini, Mônica Regina de Azevedo, João Carlos Gomes, Osnara Maria Mongruel Gomes

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