March 27, 2006 Antibacterial activity of dental composites containing quaternary ammonium polyethylenimine nanoparticles against Streptococcus mutans. March 27, 2006/ Infinix by Nobio Beyth N, Yudovin-Farber I, Bahir R, Domb AJ, Weiss EI. Biomaterials. 2006;27(21):3995–4002. Download PDF