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Dispersion of Aerosols Generated during Dental Therapy

Author

Listed:
  • Yusuke Takanabe

    (Department of Oral and Maxillofacial Surgery, Center Hospital of the National Center for Global Health and Medicine, 1-21-1 Toyama, Shinjuku-ku, Tokyo 162-8655, Japan
    Department of Oral and Maxillofacial Surgery, Faculty of Medicine, Tokyo Medical University, 6-7-1 Nishishinjuku, Shinjuku-ku, Tokyo 160-0023, Japan)

  • Yutaka Maruoka

    (Department of Oral and Maxillofacial Surgery, Center Hospital of the National Center for Global Health and Medicine, 1-21-1 Toyama, Shinjuku-ku, Tokyo 162-8655, Japan
    Department of Oral and Maxillofacial Surgery, Graduate School, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8549, Japan)

  • Junko Kondo

    (Department of Oral and Maxillofacial Surgery, Center Hospital of the National Center for Global Health and Medicine, 1-21-1 Toyama, Shinjuku-ku, Tokyo 162-8655, Japan)

  • Shotaro Yagi

    (Department of Oral and Maxillofacial Surgery, Center Hospital of the National Center for Global Health and Medicine, 1-21-1 Toyama, Shinjuku-ku, Tokyo 162-8655, Japan)

  • Daichi Chikazu

    (Department of Oral and Maxillofacial Surgery, Faculty of Medicine, Tokyo Medical University, 6-7-1 Nishishinjuku, Shinjuku-ku, Tokyo 160-0023, Japan)

  • Ryuta Okamoto

    (Shin Nippon Air Technologies Co., Ltd., Solutions Division, Hamacho Central Building 8F, 2-31-11 Nihonbashihamacho, Chuo-ku, Tokyo 103-0007, Japan)

  • Masao Saitoh

    (Center for Medical Education and Sciences, Graduate School of Medicine, University of Yamanashi, Chuo, Yamanashi 409-3898, Japan)

Abstract

The novel coronavirus pandemic has resulted in an urgent need to study the risk of infection from aerosols generated during dental care and to conduct a review of infection controls. However, existing studies on aerosol particles related to dental treatment have mainly evaluated only the scattering range. Few studies have been conducted on the specifics of the generation of aerosol particles in clinical settings, their mechanisms and patterns of distribution throughout open or enclosed spaces, the duration that they remain suspended in air, and the amount and size of particles present. To minimize the influence of background particles, laser lights, a high-sensitivity camera, and particle counters were used in a large super clean laboratory to investigate the dynamics of aerosols generated during the operation of dental micromotors. The results indicate that aerosols tend to scatter upward immediately after generation and then gradually disperse into the surroundings. Most of the particles are less than 5 µm in size (only a few are larger), and all particles are widely distributed over the long term. Our research clearly elucidates that aerosols produced in dental care are distributed over a wide area and remain suspended for a considerable time in dental clinics before settling.

Suggested Citation

  • Yusuke Takanabe & Yutaka Maruoka & Junko Kondo & Shotaro Yagi & Daichi Chikazu & Ryuta Okamoto & Masao Saitoh, 2021. "Dispersion of Aerosols Generated during Dental Therapy," IJERPH, MDPI, vol. 18(21), pages 1-10, October.
    • Handle: RePEc:gam:jijerp:v:18:y:2021:i:21:p:11279-:d:665844
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    References listed on IDEAS

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    1. Imena Rexhepi & Rocco Mangifesta & Manlio Santilli & Silvia Guri & Piero Di Carlo & Gianmaria D’Addazio & Sergio Caputi & Bruna Sinjari, 2021. "Effects of Natural Ventilation and Saliva Standard Ejectors during the COVID-19 Pandemic: A Quantitative Analysis of Aerosol Produced during Dental Procedures," IJERPH, MDPI, vol. 18(14), pages 1-9, July.
    2. Bruna Sinjari & Imena Rexhepi & Manlio Santilli & Gianmaria D′Addazio & Piero Chiacchiaretta & Piero Di Carlo & Sergio Caputi, 2020. "The Impact of COVID-19 Related Lockdown on Dental Practice in Central Italy—Outcomes of A Survey," IJERPH, MDPI, vol. 17(16), pages 1-14, August.
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