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International Journal of Dentistry
Volume 2016 (2016), Article ID 8346782, 8 pages
http://dx.doi.org/10.1155/2016/8346782
Research Article

Surface Roughness, Microhardness, and Microleakage of a Silorane-Based Composite Resin after Immediate or Delayed Finishing/Polishing

1Department of Restorative Dentistry, School of Dentistry, Federal University of Minas Gerais, Avenida Antônio Carlos 6627, Pampulha, 31270-901 Belo Horizonte, MG, Brazil
2Department of Social and Preventive Dentistry, School of Dentistry, Federal University of Minas Gerais, Avenida Antônio Carlos 6627, Pampulha, 31270-901 Belo Horizonte, MG, Brazil

Received 27 October 2015; Accepted 22 December 2015

Academic Editor: Patricia Pereira

Copyright © 2016 Fernanda Carvalho Rezende Lins et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Objective. This study evaluated the effect of immediate or delayed finishing/polishing using different systems on the surface roughness, hardness, and microleakage of a silorane-based composite. Material and Methods. Specimens were made with silorane-based composite (Filtek P90, 3M ESPE) and assigned to the treatments: control (light-cured); aluminum oxide discs (Sof-Lex, 3M ESPE); diamond-impregnated silicone tips (Astropol, Ivoclar Vivadent); aluminum oxide-impregnated silicone tips (Enhance, Dentsply). Half of the specimens were finished/polished immediately and the rest after 7 days. Surface roughness (Ra, μm; ) and Vickers microhardness (50 g; 45 s; ) were measured. Cavities were prepared in bovine incisors and filled with Filtek P90. The fillings received immediate or delayed finishing/polishing () and were subjected to dye penetration test (0.5% basic fuchsin, 24 h). Data were analyzed by ANOVA and Scheffe, Kruskal-Wallis, and Mann-Whitney tests (). Results. The finishing/polishing system significantly influenced roughness and microhardness (). For enamel, microleakage was not affected by the finishing/polishing system (). For dentin, Sof-Lex discs and Astropol points promoted greater microleakage than Enhance points (). Conclusion. Considering roughness, microhardness, and microleakage together, immediate finishing/polishing of a silorane-based composite using aluminum oxide discs may be recommended.