Evaluación del grado de microfiltración comparando tres sistemas adhesivos autograbantes : estudio In-Vitro.

Abstract

Introduction: The adhesive systems seek as their main goal, to obtain a complete interaction with the dental structure that provides high adhesion strength, satisfactory sealing, good marginal adaptation and less microleakage of bacteria, fluids, molecules or ions between the walls of the cavity preparation and restorative material. Purpose: To evaluate in vitro the degree of microleakage of composite resin restorations, using three different trademarks of self-etching adhesive systems, comparing two techniques: with selective etching in enamel and with self-etching technique, performing artificial aging at various temperatures. Materials and Methods: The sample consisted of 70 premolars divided into three groups of 20 samples plus a control group of 10 samples, the Tetric NBond Universal (Ivoclar), Prime & Bond Universal (Dentsply), One Coat adhesives were used 7 Universal (Coltene), applying two adhesive techniques: selective enamel etching technique and self-etching technique. The control group with the three-step total etched technique with the Optibond FL (Kerr) adhesive system. The thermocycling process was 500 cycles of 55 ° C, 37 ° C and 5 ° C and microleakage was detected by penetration of 2% Giemsa staining and observed with a stereomicroscope. Results: Statistically there were no significant differences (p≥0.05) between both adhesive techniques. A greater quantity of dental pieces was recorded without microleakage in group 1 with selective etching technique. Discussion: Studies conducted by Souza Junior et al. they suggest that using the self-etching adhesive system with selective enamel etching promotes better adaptation. Conclusion: The enamel selective etching technique presented minor microleakage predominantly grades 0 and 1, compared to the self-etch technique where grade 1 and 2 predominated.