Influência da dentina molhada com extrato de semente de uva na resistência de união de pino de vidro e dentina condicionada com ácido glicólico

Abstract

The aim of this study was to evaluate the bond strength of fiberglass posts to root dentin through the push out test using two dentin conditioners: glycolic acid 37% and phosphoric acid 37%, and two adhesive systems, as well as the interference of grape seed extract (GSE) in their adhesion. Thus, forty single-rooted bovine teeth divided into four groups were repaired: G1- 37% glycolic acid, dentin wetted with GSE, SingleBond/RelyX-ARC; G2- 37% glycolic acid, wet dentin with GSE, One Step Plus/ Duo-Link Bisco; G3- 37% phosphoric acid, dentin wetted with GSE, SingleBond/RelyXARC; G4- phosphoric acid 37%, dentin wet with GSE, One Step Plus/ Duo-Link Bisco. Disks with an internal diameter of 2mm, an external diameter of 5mm and a height of 2mm were obtained from each tooth. These disks were submitted to the push out test in a universal testing machine at 0.5mm/min. Statistical analysis showed that for the One Step Plus adhesive system, the highest bond strength values were analyzed when associated with phosphoric acid and for the Single Bond adhesive system, there was no statistical difference in the different dentin conditions. Therefore, the One Step Plus adhesive system associated with phosphoric acid presents greater resistance when compared to the Single Bond adhesive system. However, further studies are suggested to evaluate the association of these protocols.