Fig. (1) Representative results of antimicrobial activity of lidocaine, chlorhexidine, and lidocaine-chlorhexidine preparation against 7 bacterial strains. Growth of bacteria was compared to the negative control, Phosphate-Buffered Saline (PBS). A) S. sanguinis; B) S. salivarius; C) S. pyogenes; D) E. faecalis; E) S. aureus; F) E. coli; G) P. aeruginosa. LD = Lidocaine (10%); CHX = Chlorhexidine (0.2%); LD-CHX = Lidocaine-Chlorhexidine preparation I.