Plasma Sterilization Effectively Reduces Bacterial Contamination in Dental Unit Waterlines

Figure 2

(a) Total bacterial count from dental chair unit output water (from airotor line). Each line indicates the average CFU/mL at the different time points. The blue line represents the average CFU/mL from output water of the PSS group. The orange line represents output water of the control group. The number of bacterial counts (CFU/mL) is presented in the table below the chart. (b) Magnified view of the area shown in the red box of (a). PSS effectively reduced the bacterial number and was found to be within the standard level recommended by CDC of less than 500 CFU/mL (the red dotted line). (c) The average CFU/mL throughout the period of experiment. The average bacterial count observed in the PSS group is significantly lower than that in the controlled one. Statistically significant difference at .

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