Advanced search
Start date
Betweenand
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

Full text
Author(s):
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. [1, 2] ; Andrade, M. F. [1]
Total Authors: 8
Affiliation:
[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
Total Affiliations: 3
Document type: Journal article
Source: Laser Physics; v. 25, n. 2 FEB 2015.
Web of Science Citations: 1
Abstract

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)

FAPESP's process: 10/08998-2 - Assessing the degree of conversion of commercial and experimental composites photoactivated with LED and Argon Laser
Grantee:Aion Mangino Messias
Support type: Scholarships in Brazil - Scientific Initiation