Fig. 4

A Bactericidal effect of AgNP–PADM hydrogels prepared using 20, 50, and 80 μg mL^− 1 AgNP solutions on Enterococcus faecalis. B Bacteriostatic effect of AgNP–PADM hydrogel prepared using 80 μg mL^− 1 AgNP solution on Staphylococcus aureus, Enterococcus faecalis, and Enterococcus Escherichia coli. C Bacteriostatic effects of AgNP–PADM hydrogels prepared using 80 μg mL^− 1 AgNP solution and stored for 3, 6, or 9 d at 4 °C Bacteriostatic effects of AgNP–PADM hydrogels were negligibly different from those on day one