Degree of conversion of different composite resins photo-activated with light-emitting diode and argon ion laser

Autor(es)

Messias, A. M. ^[1] ; Galvao, M. R. ^[1] ; Boaventura, J. M. C. ^[1] ; Jacomassi, D. P. ^[2] ; Bernardi, M. I. B. ^[3] ; Bagnato, V. S. ^[2] ; Rastelli, A. N. S. ^{[2, 1]} ; Andrade, M. F. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Paulista UNESP, Sch Dent, Dept Restorat Dent, Araraquara, SP - Brazil

^[2] Univ Sao Paulo, Sao Carlos Phys Inst, Opt Grp, Biophoton Lab, Sao Carlos, SP - Brazil

^[3] Univ Sao Paulo, Sao Carlos Phys Inst, Crystal Growth & Ceram Mat Grp, Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Laser Physics; v. 25, n. 2 FEB 2015.
• Citações Web of Science: 1

Resumo

This study evaluated the degree of conversion (DC%) of one experimental and different brands of composite resins light-cured by two light sources (one LED and one argon laser). The percentage of unreacted C = C was determined from the ratio of absorbance intensities of aliphatic C = C (peak at 1637 cm(-1)) against internal standards before and after curing: aromatic C-C (peak at 1610 cm(-1)) except for P90, where % C = C bonds was given for C-O-C (883 cm(-1)) and C-C (1257 cm(-1)). ANOVA and Tukey's test revealed no statistically significant difference among Z350 (67.17), Z250 (69.52) and experimental (66.61 +/- 2.03) with LED, just among them and Evolu-X (75.51) and P90 (32.05) that showed higher and lower DC%, respectively. For the argon laser, there were no differences among Z250 (70.67), Z350 (69.60), experimental (65.66) and Evolu-X (73, 37), however a significant difference was observed for P90 (36.80), which showed lowest DC%. The light sources showed similar DC%, however the main difference was observed regarding the composite resins. The lowest DC% was observed for the argon laser. P90 showed the lowest DC% for both light-curing sources. (AU)

• Processo FAPESP: 10/08998-2 - Avaliação do grau de conversão de resinas compostas comerciais e experimental fotoativadas com LED e Laser de Argônio.
• Beneficiário: Aion Mangino Messias
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica