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AEROSOLS
IN DENTISTRY
Veronika Chuchmová
394229@mail.muni.cz
Department of Public Health, Faculty of Medicine, Masaryk University
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̶Basic information
̶Infectious aerosols in dental office
̶Aerosol in dental environment
̶Current information about aerosols and COVID-19
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Content
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Picture reference: https://www.todaysrdh.com/
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DEFINITION
A Comprehensive Review on Ultrasonic Scaling for Dental Hygienists - Today's RDH
̶Aerosols = liquid or solid particles suspended in the air by humans, animals, instruments, or
machines.
̶Bio-aerosols = aerosols consisting of particles of any kind of organism.
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̶Aerosol - particles less than 5 μm in diameter
̶Splatter - particles larger than 5 μm in diameter
Picture reference: Collection, particle sizing and detection of airborne viruses (2019)
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DEFINITION
Collection, particle sizing and detection of airborne viruses - Pan - 2019 - Journal of Applied
Microbiology - Wiley Online Library
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Aerosol particles: < 5 μm
Mycobacterium tuberculosis: 2 µm
Staphylococcus epidermidis: 1,5 µm
Coronaviridae: 100-150 nm
Influenza viruses: 80-120 nm
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Picture reference:
https://www.news-medical.net/health/The-Size-of-SARS-CoV-2-Compared-to-Other-Things.aspx
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SIZE COMPARISON
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Reference: Aerosols and splatter in dentistry (2004)
https://jada.ada.org/article/S0002-8177(14)61227-7/fulltext#cesec60
Particle sizes of infectious aerosols: implications for infection control (2020)
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DISEASES KNOWN TO BE SPREAD BY DROPLETS OR AEROSOLS
Tuberculosis, Influenza, Legionnaires' Disease, Severe Acute Respiratory Syndrome, Measles,
Pneumonic Plague,
diseases caused by herpetic viruses (Varicella Zoster Virus) and rhinovirus.
Virus, Microscope, Infection, Disease, Death, Medical Virus, Covid, Science, Covid19 Bacteria,
Medical, Biology, Health, Anatomy, Science
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Reference: A scoping review on bio-aerosols in healthcare and the dental environment (2017)
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INFECTIOUS AEROSOLS IN DENTAL OFFICE

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To minimise the likelihood of airborne disease transmission via droplets or aerosols, the dental
team adopts the following (SARS, 2004):
1.Reduction of droplet/aerosol generation
2.Use of rubber dam isolation
3.Use of pre-procedure mouthwash ( 0.12% chlorhexidine mouth rinse or povidone iodine)
4.Dilution and efficient removal of contaminated ambient air (High volume evacuation, ventilation)
5.Disinfect air/aerosol generated (Ultraviolet germicidal irradiation etc.)
6.Adoption of contact precautions (Thorough hand washing, Personal protective equipment )
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Reference: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7091810/
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INFECTIOUS AEROSOLS IN DENTAL OFFICE
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Reference: https://www.cdc.gov/coronavirus/2019-ncov/hcp/dental-settings.html
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CDC: Summary of Recent Changes
COVID-19: Guidance for Dental Settings
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WHO
https://www.who.int
CDC
https://www.cdc.gov/coronavirus/2019-ncov/index.html
Science
https://www.sciencemag.org/collections/coronavirus?intcmp=sci_cov
Actual information from Ministry of Health of the Czech Republic
https://onemocneni-aktualne.mzcr.cz/covid-19?utm_source=general&utm_medium=widget&utm_campaign=covi
d-19
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COVID-19: RELEVANT INFORMATION
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̶To date (October 28) there are no relevant studies in COVID-19 and aerosol
̶The current guidelines are extrapolated from influenza and previous outbreaks of SARS-1 and on
expert opinion
̶At this moment there are few researching groups around the world which focused on aerosol in
dental offices (one in Czech Republic)
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Aerosols in dental offices
Conclusion
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