The Air Distribution and Transmission of Human Expiratory Droplet Aerosol in Indoor Environment: A Study Progress

Li, Yan Ju; Jin, Ming

doi:10.4028/www.scientific.net/amr.864-867.1630

Cited by 1 publication

(1 citation statement)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For example, the human oral cavity provides an ideal culture medium environment for the growth of microorganisms [1]. Studies have shown that oral-related behaviors such as breathing, coughing, sneezing, and speaking can produce particulate matter which will suspend and cause a risk of spreading viruses [2][3][4]. In addition, the use of medical devices, such as the various high-speed rotating instruments in a dental surgery, can produce a high concentration of aerosol, which may carry particles of blood, microorganisms, dental materials, saliva, etc.…”

Section: Introductionmentioning

confidence: 99%

A preliminary experimental study on the user behaviors and aerosol emissions of electric toothbrushes

Tang

Li²,

Ye³

2022

E3S Web Conf.

View full text Add to dashboard Cite

The oral cavity is a human organ where a high concentration of microorganisms occupies. Evidence has shown that using dental instruments may trigger the release of microbial aerosol indoors. In this paper, the aerosol emissions during the working process of electric toothbrushes were investigated as follows. First, brushing habits, e.g., the favorite brand and flavor of the toothpaste, first tooth/teeth to brush, etc., were determined by 70 questionnaires from university students. Second, typical toothpaste usage per time was determined as 0.3g–0.5g based on a squeezing test by the group. Third, an experimental setup was designed to simulate toothbrushing to measure aerosol emissions. Finally, the measured emissions during toothbrushing were compared with other oral activities. The results showed that the peak PM2.5 emission rate can reach up to 5.9 μg/s by using a typical toothpaste dosage. The number of particles emitted if the incisors were brushed first can be 1–2 times higher than if the molars were firstly brushed. The magnitude of aerosol generated from electric toothbrushing was similar to that of coughing and sneezing.

show abstract

Section: Introductionmentioning

confidence: 99%