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Droplet Sizes Emitted from Demonstration Electric Toothbrushes.
Mark, Erwin P; Lewis, Michael A O; Graziani, Filippo; Atlas, Boris; Utsch, Joern.
  • Mark EP; Research & Development, Procter & Gamble Service GmbH, German Innovation Center, Frankfurter Straße 145, 61476 Kronberg, Germany.
  • Lewis MAO; School of Dentistry, Cardiff University, Cardiff, Wales CF14 4XY, UK.
  • Graziani F; Department of Surgical, Medical and Molecular Pathology and Critical Care Medicine, University of Pisa, 56126 Pisa, Italy.
  • Atlas B; Sub-Unit of Periodontology, Halitosis and Periodontal Medicine, University Hospital of Pisa, 56126 Pisa, Italy.
  • Utsch J; Research & Development, Procter & Gamble Service GmbH, German Innovation Center, Frankfurter Straße 145, 61476 Kronberg, Germany.
Int J Environ Res Public Health ; 18(5)2021 02 26.
Article in English | MEDLINE | ID: covidwho-1154358
ABSTRACT
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.
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Full text: Available Collection: International databases Database: MEDLINE Main subject: Toothbrushing / Aerosols / Dental Equipment Type of study: Experimental Studies / Prognostic study Language: English Year: 2021 Document Type: Article Affiliation country: Ijerph18052320

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Full text: Available Collection: International databases Database: MEDLINE Main subject: Toothbrushing / Aerosols / Dental Equipment Type of study: Experimental Studies / Prognostic study Language: English Year: 2021 Document Type: Article Affiliation country: Ijerph18052320