Figure 4: Diagram of the absorption at 450 nm (reference wavelength 620 nm) of XTT+ menadione+ phenazine methosulfate, metabolized by saliva biofilms for 48 h after treatment with 0.9% NaCl solution (control), gaseous ozone and chlorhexidine.
Mean cell numbers ± standard deviations, *(p<0.02) vs. 0.9% NaCl control