Antibacterial, physical and mechanical properties of flowable resin composites containing zinc oxide nanoparticles.

Objectives: The aim of this study is evaluating the antibacterial activity of resin composites containing ZnO nanoparticles against Streptococcus mutans and examining their physical and mechanical properties.

Methods: The properties of flowable resin composites containing 0-5wt.% nano-ZnO are investigated using different tests:

Results: Although the agar diffusion test reveals no significant difference between the groups, the direct contact test demonstrates that by increasing the nanoparticle content, the bacterial growth is significantly diminished (p<0.