Effect of finishing and polishing on surface roughness of composite resins after bleaching

Authors

  • Bruna Fortes Bittencourt Universidade Estadual de Ponta Grossa - UEPG
  • Giovana Mongruel Gomes Universidade Estadual de Ponta Grossa - UEPG
  • Felipe Auer Trentini Universidade Estadual de Ponta Grossa - UEPG
  • Mônica Regina de Azevedo Universidade Estadual de Ponta Grossa - UEPG
  • João Carlos Gomes Universidade Estadual de Ponta Grossa - UEPG
  • Osnara Maria Mongruel Gomes Universidade Estadual de Ponta Grossa - UEPG

DOI:

https://doi.org/10.20396/bjos.v13i2.8640918

Keywords:

Composite resins, Dental polishing, Tooth bleaching

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.

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Author Biographies

Bruna Fortes Bittencourt, Universidade Estadual de Ponta Grossa - UEPG

Universidade Estadual de Ponta Grossa - UEPG, School of Dentistry, Area of Dental Materials, Ponta Grossa, PR.

Giovana Mongruel Gomes, Universidade Estadual de Ponta Grossa - UEPG

Universidade Estadual de Ponta Grossa - UEPG, School of Dentistry, Area of Dental Materials, Ponta Grossa, PR.

Felipe Auer Trentini, Universidade Estadual de Ponta Grossa - UEPG

Universidade Estadual de Ponta Grossa - UEPG, School of Dentistry, Area of Dental Materials, Ponta Grossa, PR.

Mônica Regina de Azevedo, Universidade Estadual de Ponta Grossa - UEPG

Universidade Estadual de Ponta Grossa - UEPG, School of Dentistry, Area of Dental Materials, Ponta Grossa, PR.

João Carlos Gomes, Universidade Estadual de Ponta Grossa - UEPG

Universidade Estadual de Ponta Grossa - UEPG, School of Dentistry, Area of Dental Materials, Ponta Grossa, PR.

Osnara Maria Mongruel Gomes, Universidade Estadual de Ponta Grossa - UEPG

Universidade Estadual de Ponta Grossa - UEPG, School of Dentistry, Area of Dental Materials, Ponta Grossa, PR.

Published

2009-12-31

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 2022 Oct. 7];13(2):158-62. Available from: https://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8640918

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