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metadata.dc.type: | Artigo de Periódico |
Title: | Monomer conversion of composite dental resins photoactivated by a halogen lamp and a LED: a FT-Raman spectroscopy study |
Other Titles: | Química Nova |
Authors: | Soares, Luís Eduardo Silva Rocha, Rick Martin, Airton Abrahão Pinheiro, Antonio Luiz Barbosa Zampieri, Marcelo |
metadata.dc.creator: | Soares, Luís Eduardo Silva Rocha, Rick Martin, Airton Abrahão Pinheiro, Antonio Luiz Barbosa Zampieri, Marcelo |
Abstract: | Eighteen circular blocks of resins cured either by a LED or a halogen lamp (20, 40 and 60 s), had their top (T) and bottom (B) surfaces studied using a FT-Raman spectrometer. Systematic changes in the intensity of the methacrylate C=C stretching mode at 1638 cm-1 as a function of exposure duration were observed. The calculated degree of conversion (DC) ranged from 45.0% (B) to 52.0% (T) and from 49.0% (B) to 55.0% (T) for the LED and halogen lamp, respectively. LED and halogen light produced similar DC values with 40 and 60 s of irradiation. |
Keywords: | Composites Degree of conversion FT-Raman spectroscopy |
URI: | http://www.repositorio.ufba.br/ri/handle/ri/4800 |
Issue Date: | 2005 |
Appears in Collections: | Artigo Publicado em Periódico (Faculdade de Odontologia) |
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