Degree of conversion of Z250 composite determined by fourier transform infrared spectroscopy: comparison of techniques, storage periods and photo-activation methods
Título del documento: Degree of conversion of Z250 composite determined by fourier transform infrared spectroscopy: comparison of techniques, storage periods and photo-activation methods
Revista: Materials research
Base de datos: PERIÓDICA
Número de sistema: 000312737
ISSN: 1516-1439
Autores: 1



2
Instituciones: 1Universidade Estadual de Campinas, Faculdade de Odontologia, Piracicaba, Sao Paulo. Brasil
2Universidade de Sao Paulo, Instituto de Quimica, Sao Carlos, Sao Paulo. Brasil
Año:
Periodo: Oct-Dic
Volumen: 7
Número: 4
Paginación: 605-610
País: Brasil
Idioma: Inglés
Tipo de documento: Nota breve o noticia
Enfoque: Experimental
Resumen en inglés The purpose of this study was to evaluate the degree of conversion (DC) of the Z250 composite, using six photo-activation methods, two storage periods and two preparation techniques of the FTIR specimens (n = 3). For the KBr pellet technique, the composite was placed into a metallic mold and photo-activated as follows: continuous light, exponential light, intermittent light, stepped light, PAC and LED. The measurements were made after 24 h and 20 days. For the resin film technique, approximately 0.07 g of the composite was pressed between two polyester strips, photo-activated as above described and analyzed. The DC was calculated by the standard technique and submitted to ANOVA and Tukey's test (alpha = 5%). Independently of the storage period and specimen preparation technique, there were no significant differences among photo-activation methods. No statistical difference was observed between the time periods used. The specimens analyzed under the KBr pellet technique presented higher DC values than those analyzed by the resin film technique
Disciplinas: Ingeniería,
Medicina,
Química
Palabras clave: Ingeniería de materiales,
Odontología,
Química industrial,
Resinas compuestas,
Fotoactivación,
Espectroscopía
Keyword: Engineering,
Medicine,
Chemistry,
Materials engineering,
Dentistry,
Industrial chemistry,
Composite resins,
Photoactivation,
Spectroscopy
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