id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
cord-233294-jnic4o2j	Ravazi, Maryam	In situ Measurement of Airborne Particle Concentration in a Real Dental Office: Implications for Disease Transmission	2020-08-19		.txt	text/plain	2928	158	55	We studied the effects of air purification (on/off), door condition (open/close), and particle sizes on the temporal concentration distribution of particles. Furthermore, research on the effects of air purifiers is needed to develop guidelines and protocols to reduce waiting time between patients and ensure the safe operation of dental offices. Figure 4a shows the lowest particle concentrations in the room when the high-speed air purifier is running from the beginning of the operation. The particle removal time varies with particle size although the air purifier and open door help reduce the concentration of all-size particles in the generation zone. • In the worst-scenario scenario with no protection system in the closed-door office and continuous high-speed drilling, it takes 95 min for 0.5 m particles to return to background level and that it takes a shorter time for particles larger than 0.5 m to be removed from the air. Running high-speed air purifier at the beginning of the operation is the most effective scenario in reducing airborne particle concentrations.	./cache/cord-233294-jnic4o2j.txt	./txt/cord-233294-jnic4o2j.txt