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

• Main Authors: Fernanda Carvalho Rezende Lins, Raquel Conceição Ferreira, Rodrigo Richard Silveira, Carolina Nemésio Barros Pereira, Allyson Nogueira Moreira, Claudia Silami Magalhães
• Format: Article
• Language: English
• Published: Hindawi Limited 2016-01-01
• Series: International Journal of Dentistry
• Online Access: http://dx.doi.org/10.1155/2016/8346782
• ISSN: 1687-8728; 1687-8736

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; n=20) and Vickers microhardness (50 g; 45 s; n=10) were measured. Cavities were prepared in bovine incisors and filled with Filtek P90. The fillings received immediate or delayed finishing/polishing (n=10) 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 (p<0.05). Results. The finishing/polishing system significantly influenced roughness and microhardness (p<0.0001). For enamel, microleakage was not affected by the finishing/polishing system (p=0.309). For dentin, Sof-Lex discs and Astropol points promoted greater microleakage than Enhance points (p=0.033). Conclusion. Considering roughness, microhardness, and microleakage together, immediate finishing/polishing of a silorane-based composite using aluminum oxide discs may be recommended.