Fig. 2From: Combinatorial therapy of chitosan hydrogel-based zinc oxide nanocomposite attenuates the virulence of Streptococcus mutansScanning electron micrograph (3000× magnification) of Streptococcus mutans biofilm. a Untreated biofilm control, b Biofilms were grown on human enamel slabs surface in the presence of sub inhibitory concentration (sub-MIC) of chitosan hydrogel (CS gel), c zinc oxide nanocomposite (ZnONC), and d chitosan/zinc oxide nanocomposite hydrogel (ZnONC-CS)Back to article page