Comparação entre a resistência adesiva de restaurações indiretas de resina composta após polimerização complementar

Abstract

One way of improving the physical properties of the composite resins is to carry out complementary polymerization, but its action on the adhesive strength of such resins is not yet clear. Therefore, the objective of this work was to evaluate the influence of the complementary polymerization in autoclave on adhesive resistance of indirect restorations of composite resin Z350® and IPS Empress®. Comparing them with the laboratory composite resin Parafil Lab®, through the mechanical test of microtraction. The experimental groups were as follows: Group 1, control, after conventional photoactivation, was polymerized in VRC® Photoactivation unit for 3 min. Group 2 and Group 3 - conventional photoactivation using the Valo® device, followed by complementary activation in autoclave at 129ºC, 1.6 kgf / cm3 for 16 min. After the resin blocks were prepared, they were stored for 24 hours at room temperature, protected from ambient light. After this preparation, the resin blocks were cemented into previously prepared teeth and then the microtensile test and evaluation of the fracture pattern of the samples. The results showed that there was no significant difference between the groups, and the comparison between group 1 - control for group 2 and 3, showing that it is possible to polymerize resins of direct use in autoclave in a complementary way, without damage to the adhesive strength of the restoration.