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

Figure 8

Quantitative analysis of the settled particles generated during scaling of lower anterior teeth in the different sites. “Open”: procedures performed with open windows, and “closed”: procedures performed with closed windows. (a) Stained area of settled particles generated in the dental unit with inadequate ventilation (Clinic 4, Unit 2 in Figure 1) with pneumatic scaler compared to ultrasonic scaler. (b) Stained area of settled particles generated in the dental unit with adequate ventilation (Clinic 4, Unit 1 in Figure 1) with pneumatic scaler compared to the ultrasonic scaler. (c) Percentage distribution of settled particles generated in the dental unit with inadequate ventilation (Clinic 4, Unit 2 in Figure 1). (d) Percentage distribution of settled particles generated in the dental unit with adequate ventilation (Clinic 4, Unit 1 in Figure 1).

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