Can ultrasound application influence the bond strength of self-adhesive resin cements to dentin?

The aim of this study was to evaluate the influence of ultrasound application on the bond strength of self-adhesives resin cements to dentin. Twenty-four third molars were randomly divided into 4 groups (n = 6/group): G1 - RelyX Unicem; G2 - Maxcem Elite; G3 - RelyX Unicem and ultrasound application; G4 - Marcem Elite and ultrasound application. Composite resin blocks were luted to flat dentin with a load of 500 g for 2 min, followed by light polymerization in G1 and G2.