Infection Risk Prediction Model for COVID-19 Based on an Analysis of the Settlement of Particles Generated during Dental Procedures in Dental Clinics

Figure 2

Aerosol-generating instruments used in the study. (a) Dental high-speed handpiece (KaVo, Standard head, Triple water spray, Berlin, Germany), with an irrigant flow rate of 50 mL/min. (b) Pneumatic scaler (AS2000, NSK, Shimohinata, Kanuma, Japan), with an irrigant flow rate of 55 mL/min. (c) Ultrasonic scaler (Cavitron Bobcat Pro, Dentsply, NY, USA), with an irrigant flow rate of 55 mL/min. (d) Air-water syringe, with an irrigant flow rate of 50 mL/min.

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