The success of adhesion to the tooth structure plays an important role in the dental restoration and the loading of adhesive compositions with fillers and nanoparticles has a significant reinforcement effect of the adhesive, thus improving physicomechanical properties of the material, and, consequently, the bond strength between the restoratives and dental substrates. The current study was designed to investigate the effects of the addition of 2% of fluorinated graphene nanoparticles (FGN) on the shear bond strength for two types of commercially available universal adhesive using etch and rinse technique as a bonding procedure. Forty extracted premolar teeth were included and divided into four groups of ten teeth. For group I, we used Prime & Bond Universal adhesive alone. For group II, we used Prime & Bond Universal adhesive +2% FGN nanoparticles. For group III, we used All Bond Universal adhesive alone. For group IV, we used All Bond Universal adhesive+2% FGN. After 24 hours, shear bond strength was tested utilizing the Laryee universal testing machine. A higher shear bond strength was observed with adhesives containing 2% FGN in comparison to study groups (P<.01). In conclusion, according to the results the addition of 2% of fluorinated graphene nanoparticles to the etch-and-rinse adhesive systems affect the shear bond strength and seem to be a good option for reinforcing adhesive systems.
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