Argon ion laser curing depth effect on a composite resin.
The aim of this study was to define optimal power settings as well as curing time associated with evaluating the curing depth of a composite resin as a function of Vickers hardness. The tests were performed with a hybrid composite resin cured with a halogen lamp and argon ion laser, with different exposure times and power settings. The composite resin bulk technique was used using a black polypropylene matrix with thicknesses ranging from 1 to 4 mm and Vickers microhardness was measured on the opposite surface of the light activation. ANOVA and Tukey statistical tests were used. The results showed that the groups activated by the laser for 20 s, at 200 and 250 mW, did not present statistically significant differences regarding the halogen lamp with 1 mm thickness, but the halogen lamp showed better results with thickness values more than 2 mm (p < 0.05).
Department of Operative Dentistry, School of Dentistry, University of São Paulo, São Paulo, USP, Brazil. miturbin@usp.br
Míriam Lacalle
ML
Turbino
Luis Carlos
LC
Belan
Valéria
V
Soprano
Kátia Martis
KM
Rode
Patrícia Ramos
PR
Lloret
Michel Nicolau
MN
Youssef
D000704:Analysis of Variance; D016009:Chi-Square Distribution; D003188:Composite Resins / Q000737:chemistry*; D055117:Curing Lights, Dental; D006244:Hardness; D006801:Humans; D066298:In Vitro Techniques; D054020:Lasers, Gas / Q000627:therapeutic use*; D013223:Statistics as Topic; D013997:Time Factors
D003188:Composite Resins