Effect of thermocycling on roughness of nanofill, microfill and microhybrid composites
| Autor: | Ana Paula Albuquerque Guedes, André Gustavo de Lima Godas, André Luiz Fraga Briso, Anderson Catelan, Paulo Henrique dos Santos, Ana K. Bedran-Russo, Thaís Yumi Umeda Suzuki |
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| Rok vydání: | 2014 |
| Předmět: |
Curing Lights
Dental Time Factors Materials science Surface Properties Composite number Temperature General Medicine Surface finish Composite Resins Dental Polishing Nanocomposites Smooth surface Dental Materials Polymethacrylic Acids Materials Testing Microscopy Electron Scanning Surface roughness Humans Methacrylates Organic matrix Profilometer Particle Size Composite material General Dentistry Light-Curing of Dental Adhesives |
| Zdroj: | Acta Odontologica Scandinavica. 73:176-181 |
| ISSN: | 1502-3850 0001-6357 |
| DOI: | 10.3109/00016357.2014.971868 |
| Popis: | Objective. This study aimed to investigate the surface roughness of composite resins subjected to thermal cycles procedure. Materials and methods. Two microfill, four microhybrid and four nanofill composites were used. The surface roughness (Ra) was initially measured in a profilometer using a cut-off 0f 0.25 mm, after 3000 and 10,000 thermal cycles. Data were subjected to ANOVA and Fischer’s test (α = 0.05). Results. Overall, 3000 thermal cycles increased the surface roughness values for all materials and there was a trend in all groups to decrease the roughness after 10,000 thermal cycles. Conclusions. The composition of material, including the type of organic matrix, could be more relevant to roughness maintenance over time than the general behavior of composites based on particles fillers. The maintenance of smooth surface in resin-based composite restorations is totally dependent of organic composition of the material. |
| Databáze: | OpenAIRE |
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