| Journal: | Materials research |
| Database: | PERIÓDICA |
| System number: | 000312951 |
| ISSN: | 1516-1439 |
| Authors: | Correr, Americo Bortolazzo1 Sinhoreti, Mario Alexandre Coelho Correr-Sobrinho, Lourenco Tango, Rubens Nisie Consani, Simonides Schneider, Luis Felipe Jochins |
| Institutions: | 1Universidade Estadual de Campinas, Escola de Odontologia, Piracicaba, Sao Paulo. Brasil |
| Year: | 2006 |
| Season: | Jul-Sep |
| Volumen: | 9 |
| Number: | 3 |
| Pages: | 275-280 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Nota breve o noticia |
| Approach: | Experimental |
| English abstract | A comparison was made of the hardness of Z250 and Esthet-X composites light cured with different light sources. Cavities (3 mm diameter x 6 mm deep) were prepared in 240 bovine incisors. The composite was bulk inserted and light-cured using halogen light, LED or xenon plasma arc (PAC) with different irradiances and exposure times, maintaining the same energy density. The specimens were stored in an incubator at 37 °C for 24 hours prior to sectioning for hardness measurements. Three measurements were taken at each depth: surface, 1, 2, 3, 4 and 5 mm. The data were analyzed by ANOVA and Tukey's test (p < 0.05). No statistically significant differences were found for LED up to 2 mm, for PAC up to 3 mm, and for halogen light up to 5 mm. Photoactivation with intermediate power density and exposure time resulted in the highest Knoop hardness values |
| Disciplines: | Ingeniería, Medicina, Química |
| Keyword: | Ingeniería de materiales, Odontología, Química de polímeros, Resinas compuestas, Propiedades mecánicas, Dureza |
| Keyword: | Engineering, Medicine, Chemistry, Materials engineering, Dentistry, Polymer chemistry, Composite resins, Mechanical properties, Hardness |
| Full text: | Texto completo (Ver HTML) |
