Adhesion techniques for each study subgroup.
|(1) Subgroup |
|Primer of adhesive system Optibond Versa (SE) was applied with microbrush rubbing the surface of the dentin for 20 seconds as indicated by the manufacturer’s instructions.|
|(2) Subgroup |
|5.25% NaOCl to dentine surface was applied, rubbing for one minute, and then dried with absorbent paper and SE was applied for 20 seconds as explained above.|
|(3) Subgroup NaOCl/SE + NaAg||Dentine surface with 5.25% NaOCl rubbing for one minute and then drying with absorbent paper. Placed on a tray 5 μL of SE and 5 μL silver nanoparticle solution were added 0.1% (Martínez-Castañon, 2008); the mixture was brought to the dentin surface by rubbing with a microbrush for 20 seconds.|