Assessing the degree of conversion of commercial and experimental composites photoactivated with LED and Argon Laser

• Grant number: 10/08998-2
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: October 01, 2010
• End date: September 30, 2011
• Field of knowledge: Health Sciences - Dentistry
• Principal Investigator: Marcelo Ferrarezi de Andrade
• Grantee: Aion Mangino Messias
• Host Institution: Faculdade de Odontologia (FOAr). Universidade Estadual Paulista (UNESP). Campus de Araraquara. Araraquara , SP, Brazil

Abstract

The purpose of this project is to assess the degree of conversion (DC%) of commercial composite resins and experimental resin developed by the Crystal Growth Group of the Institute of Physics of São Carlos-USP varying light sources (LED and Laser Argon), within 24 hours after polymerization. Five bodies-of-proof will be made by the group with the resins: FiltekTM Z250 (3M ESPE, control), FiltekTM Z350 (3M ESPE), Evolu-X (Dentsplay) FiltekTM P90 (3M ESPE) and experimental resin with nano particles zirconium dioxide using metal matrix (4 mm in diameter and 2 mm thick - ISO 4049). Will be used for curing the device LED D2000® (DMC)for 40s and a device with laser technology that used for curing composite resins presented as the active medium argon gas, then calling itself the argon laser with a wavelength between 450-500nm by 10s of exposure. For the GC (%), samples are crushed, pressed with KBr and analyzed by spectrophotometer Nexus - 470, equipped with TGS detector (4000-300 cm-1) using diffuse reflectance accessory (32 scans, resolution 4 cm- 1) attached to the computer. Analysis of Variance (ANOVA) and Tukey test will be used for the GC (%) with p> 0.05.

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

MESSIAS, A. M.; GALVAO, M. R.; BOAVENTURA, J. M. C.; JACOMASSI, D. P.; BERNARDI, M. I. B.; BAGNATO, V. S.; RASTELLI, A. N. S.; ANDRADE, M. F.. Degree of conversion of different composite resins photo-activated with light-emitting diode and argon ion laser. Laser Physics, v. 25, n. 2, FEB 2015. (10/08998-2)