Figure 3.
Schemes representing the topographic distribution and the tracer levels after the dental procedures using the following: air turbine (A), contra-angle (B), and ultrasonic scaler (C) handpieces. Each red dot represents a measurement site of the operatory, including the ceilings, depicted below the main schemes. Values greater than 0.20 colony-forming units per square centimeter (CFU/cm2) are considered as high contamination levels, and the corresponding surfaces are displayed in red. Lower values indicate moderate contamination, and the corresponding surfaces are displayed in orange. White dots and surfaces represent no detection of the tracer.