The efficacy of an extraoral scavenging device on reducing aerosol particles ≤ 5 µm during dental aerosol-generating procedures: an exploratory pilot study in a university setting

Abstract Objective/aim To identify small particle concentrations (eight categories: ≤0.1 µm × ≤5.0 µm) induced by aerosol-generating procedures (AGPs; high-speed tooth preparation, ultrasonic scaling; air polishing) under high-flow suction with a 16-mm intraoral cannula with and without an additiona...

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Main Authors: Christian Graetz, Paulina Düffert, Ralf Heidenreich, Miriam Seidel, Christof E. Dörfer
Format: Article
Language:English
Published: Nature Publishing Group 2021-05-01
Series:BDJ Open
Online Access:https://doi.org/10.1038/s41405-021-00074-5
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spelling doaj-466973672cb14b229afff984f3ff72302021-05-23T11:41:49ZengNature Publishing GroupBDJ Open2056-807X2021-05-01711710.1038/s41405-021-00074-5The efficacy of an extraoral scavenging device on reducing aerosol particles ≤ 5 µm during dental aerosol-generating procedures: an exploratory pilot study in a university settingChristian Graetz0Paulina Düffert1Ralf Heidenreich2Miriam Seidel3Christof E. Dörfer4Clinic of Conservative Dentistry and Periodontology, University Medical Center Schleswig-HolsteinClinic of Conservative Dentistry and Periodontology, University Medical Center Schleswig-HolsteinInstitute of Air Handling and RefrigerationClinic of Conservative Dentistry and Periodontology, University Medical Center Schleswig-HolsteinClinic of Conservative Dentistry and Periodontology, University Medical Center Schleswig-HolsteinAbstract Objective/aim To identify small particle concentrations (eight categories: ≤0.1 µm × ≤5.0 µm) induced by aerosol-generating procedures (AGPs; high-speed tooth preparation, ultrasonic scaling; air polishing) under high-flow suction with a 16-mm intraoral cannula with and without an additional mobile extraoral scavenger (EOS) device during student training. Materials and methods Twenty tests were performed (16.94 m2 room without ventilation with constant temperature (26.7 (1.1) °C and humidity (56.53 (4.20)%)). Data were collected 2 min before, 2 min during, and 6 min after AGPs. The EOS device and the air sampler for particle counting were placed 0.35 m from the open mouth of a manikin head. The particle number concentration (PN, counts/m3) was measured to calculate ΔPN (ΔPN = [post-PN] − [pre-PN]). Results Mean ΔPN (SD) ranged between −8.65E+06 (2.86E+07) counts/m3 for 0.15 µm and 6.41E+04 (2.77E+05) counts/m3 for 1.0 µm particles. No significant differences were found among the AGP groups (p > 0.05) or between the AGP and control groups (p > 0.05). With an EOS device, lower ΔPN was detected for smaller particles by high-speed tooth preparation (0.1–0.3 µm; p < 0.001). Discussion A greater reduction in the number of smaller particles generated by the EOS device was found for high-speed tooth preparation. Low ΔPN by all AGPs demonstrated the efficacy of high-flow suction. Conclusions The additional use of an EOS device should be carefully considered when performing treatments, such as high-speed tooth preparation, that generate particularly small particles when more people are present and all other protective options have been exhausted.https://doi.org/10.1038/s41405-021-00074-5
collection DOAJ
language English
format Article
sources DOAJ
author Christian Graetz
Paulina Düffert
Ralf Heidenreich
Miriam Seidel
Christof E. Dörfer
spellingShingle Christian Graetz
Paulina Düffert
Ralf Heidenreich
Miriam Seidel
Christof E. Dörfer
The efficacy of an extraoral scavenging device on reducing aerosol particles ≤ 5 µm during dental aerosol-generating procedures: an exploratory pilot study in a university setting
BDJ Open
author_facet Christian Graetz
Paulina Düffert
Ralf Heidenreich
Miriam Seidel
Christof E. Dörfer
author_sort Christian Graetz
title The efficacy of an extraoral scavenging device on reducing aerosol particles ≤ 5 µm during dental aerosol-generating procedures: an exploratory pilot study in a university setting
title_short The efficacy of an extraoral scavenging device on reducing aerosol particles ≤ 5 µm during dental aerosol-generating procedures: an exploratory pilot study in a university setting
title_full The efficacy of an extraoral scavenging device on reducing aerosol particles ≤ 5 µm during dental aerosol-generating procedures: an exploratory pilot study in a university setting
title_fullStr The efficacy of an extraoral scavenging device on reducing aerosol particles ≤ 5 µm during dental aerosol-generating procedures: an exploratory pilot study in a university setting
title_full_unstemmed The efficacy of an extraoral scavenging device on reducing aerosol particles ≤ 5 µm during dental aerosol-generating procedures: an exploratory pilot study in a university setting
title_sort efficacy of an extraoral scavenging device on reducing aerosol particles ≤ 5 µm during dental aerosol-generating procedures: an exploratory pilot study in a university setting
publisher Nature Publishing Group
series BDJ Open
issn 2056-807X
publishDate 2021-05-01
description Abstract Objective/aim To identify small particle concentrations (eight categories: ≤0.1 µm × ≤5.0 µm) induced by aerosol-generating procedures (AGPs; high-speed tooth preparation, ultrasonic scaling; air polishing) under high-flow suction with a 16-mm intraoral cannula with and without an additional mobile extraoral scavenger (EOS) device during student training. Materials and methods Twenty tests were performed (16.94 m2 room without ventilation with constant temperature (26.7 (1.1) °C and humidity (56.53 (4.20)%)). Data were collected 2 min before, 2 min during, and 6 min after AGPs. The EOS device and the air sampler for particle counting were placed 0.35 m from the open mouth of a manikin head. The particle number concentration (PN, counts/m3) was measured to calculate ΔPN (ΔPN = [post-PN] − [pre-PN]). Results Mean ΔPN (SD) ranged between −8.65E+06 (2.86E+07) counts/m3 for 0.15 µm and 6.41E+04 (2.77E+05) counts/m3 for 1.0 µm particles. No significant differences were found among the AGP groups (p > 0.05) or between the AGP and control groups (p > 0.05). With an EOS device, lower ΔPN was detected for smaller particles by high-speed tooth preparation (0.1–0.3 µm; p < 0.001). Discussion A greater reduction in the number of smaller particles generated by the EOS device was found for high-speed tooth preparation. Low ΔPN by all AGPs demonstrated the efficacy of high-flow suction. Conclusions The additional use of an EOS device should be carefully considered when performing treatments, such as high-speed tooth preparation, that generate particularly small particles when more people are present and all other protective options have been exhausted.
url https://doi.org/10.1038/s41405-021-00074-5
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