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Droplet Sizes Emitted from Demonstration Electric Toothbrushes
The COVID-19 pandemic has drawn attention to microbial transmission risk via aerosols in dental practice. Demonstration electric toothbrushes are used intra-orally for education. The aim of this investigation was to measure the size of droplets emitted by the brush head of two demonstration oscillat...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7956750/ https://www.ncbi.nlm.nih.gov/pubmed/33652982 http://dx.doi.org/10.3390/ijerph18052320 |
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author | Mark, Erwin P. Lewis, Michael A. O. Graziani, Filippo Atlas, Boris Utsch, Joern |
author_facet | Mark, Erwin P. Lewis, Michael A. O. Graziani, Filippo Atlas, Boris Utsch, Joern |
author_sort | Mark, Erwin P. |
collection | PubMed |
description | The COVID-19 pandemic has drawn attention to microbial transmission risk via aerosols in dental practice. Demonstration electric toothbrushes are used intra-orally for education. The aim of this investigation was to measure the size of droplets emitted by the brush head of two demonstration oscillating-rotating electric toothbrushes. Measurement of droplet production and size was recorded in vitro using three methods: (1) Malvern Spraytec (LASER particle size measurement device with detectable particle size of 0.1–2500 µm) and brushes mounted on a 3D-printed, two-shell form-fit fixture with a supply of tap water; (2) a DustTrak aerosol measurement device and toothpaste slurry, with brushing simulated in the oral cavity of a phantom head; (3) high-speed visualization in a simulated-use situation in the oral cavity of a phantom head, with individual evaluation of tap water, water with detergent, 70% ethanol, glycerin and toothpaste slurry. Both brushes showed the size of emitted droplets was consistently between 200 and 1200 µm, categorized as splatter (dental aerosols are <50 µm diameter). No significant incremental aerosol-sized matter was detected during toothbrush operation. The high-speed video visualization confirmed only splatter-sized droplets during operation. These findings indicate that oscillating-rotating toothbrushes do not produce aerosol-sized particles during simulated use. |
format | Online Article Text |
id | pubmed-7956750 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-79567502021-03-16 Droplet Sizes Emitted from Demonstration Electric Toothbrushes Mark, Erwin P. Lewis, Michael A. O. Graziani, Filippo Atlas, Boris Utsch, Joern Int J Environ Res Public Health Article The COVID-19 pandemic has drawn attention to microbial transmission risk via aerosols in dental practice. Demonstration electric toothbrushes are used intra-orally for education. The aim of this investigation was to measure the size of droplets emitted by the brush head of two demonstration oscillating-rotating electric toothbrushes. Measurement of droplet production and size was recorded in vitro using three methods: (1) Malvern Spraytec (LASER particle size measurement device with detectable particle size of 0.1–2500 µm) and brushes mounted on a 3D-printed, two-shell form-fit fixture with a supply of tap water; (2) a DustTrak aerosol measurement device and toothpaste slurry, with brushing simulated in the oral cavity of a phantom head; (3) high-speed visualization in a simulated-use situation in the oral cavity of a phantom head, with individual evaluation of tap water, water with detergent, 70% ethanol, glycerin and toothpaste slurry. Both brushes showed the size of emitted droplets was consistently between 200 and 1200 µm, categorized as splatter (dental aerosols are <50 µm diameter). No significant incremental aerosol-sized matter was detected during toothbrush operation. The high-speed video visualization confirmed only splatter-sized droplets during operation. These findings indicate that oscillating-rotating toothbrushes do not produce aerosol-sized particles during simulated use. MDPI 2021-02-26 2021-03 /pmc/articles/PMC7956750/ /pubmed/33652982 http://dx.doi.org/10.3390/ijerph18052320 Text en © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Mark, Erwin P. Lewis, Michael A. O. Graziani, Filippo Atlas, Boris Utsch, Joern Droplet Sizes Emitted from Demonstration Electric Toothbrushes |
title | Droplet Sizes Emitted from Demonstration Electric Toothbrushes |
title_full | Droplet Sizes Emitted from Demonstration Electric Toothbrushes |
title_fullStr | Droplet Sizes Emitted from Demonstration Electric Toothbrushes |
title_full_unstemmed | Droplet Sizes Emitted from Demonstration Electric Toothbrushes |
title_short | Droplet Sizes Emitted from Demonstration Electric Toothbrushes |
title_sort | droplet sizes emitted from demonstration electric toothbrushes |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7956750/ https://www.ncbi.nlm.nih.gov/pubmed/33652982 http://dx.doi.org/10.3390/ijerph18052320 |
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