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Fallow time determination in dentistry using aerosol measurement in mechanically and non-mechanically ventilated environments
Aim To calculate fallow time (FT) required following dental aerosol generating procedures (AGPs) in both a dental hospital (mechanically ventilated) and primary care (non-mechanically ventilated). Secondary outcomes were to identify spread and persistence of aerosol in open clinics compared to close...
Autores principales: | , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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Nature Publishing Group UK
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8390043/ https://www.ncbi.nlm.nih.gov/pubmed/34446842 http://dx.doi.org/10.1038/s41415-021-3369-1 |
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author | Shahdad, Shakeel Hindocha, Annika Patel, Tulsi Cagney, Neil Mueller, Jens-Dominik Koched, Amine Seoudi, Noha Morgan, Claire Fleming, Padhraig S. Din, Ahmed Riaz |
author_facet | Shahdad, Shakeel Hindocha, Annika Patel, Tulsi Cagney, Neil Mueller, Jens-Dominik Koched, Amine Seoudi, Noha Morgan, Claire Fleming, Padhraig S. Din, Ahmed Riaz |
author_sort | Shahdad, Shakeel |
collection | PubMed |
description | Aim To calculate fallow time (FT) required following dental aerosol generating procedures (AGPs) in both a dental hospital (mechanically ventilated) and primary care (non-mechanically ventilated). Secondary outcomes were to identify spread and persistence of aerosol in open clinics compared to closed surgeries (mechanically ventilated environment), and identify if extraoral scavenging (EOS) reduces FT and production of aerosol. Methods In vitro simulation of fast handpiece cavity preparations using a manikin was conducted in a mechanically and non-mechanically ventilated environment using Optical Particle Sizer and NanoScan at baseline, during the procedure and fallow period. Results AGPs carried out in the non-mechanically, non-ventilated environment failed to achieve baseline particle levels after one hour. In contrast, when windows were opened after AGPs, there was an immediate reduction in all particle sizes. In mechanically ventilated environments, the baseline levels of particles were very low and particle count returned to baseline within ten minutes following the AGP. There was no detectable difference between particles in mechanically ventilated open bays and closed surgeries. The effect of the EOS on reducing the particle count was greater in the non-mechanically ventilated environment; additionally, it also reduced the spikes in particle counts in mechanically ventilated environments. Conclusion High-efficiency particulate, air-filtered mechanical ventilation, along with mitigation (high-volume suction), resulted in reduction of fallow time (ten minutes). Non-ventilated rooms failed to reach baseline level even after one hour of fallow time. There was no difference in particle counts in open bays or closed surgeries in mechanically ventilated settings with an extraoral suction device reducing particulate spikes. This study confirms that AGPs are not recommended in dental surgeries where no ventilation is possible. |
format | Online Article Text |
id | pubmed-8390043 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-83900432021-08-27 Fallow time determination in dentistry using aerosol measurement in mechanically and non-mechanically ventilated environments Shahdad, Shakeel Hindocha, Annika Patel, Tulsi Cagney, Neil Mueller, Jens-Dominik Koched, Amine Seoudi, Noha Morgan, Claire Fleming, Padhraig S. Din, Ahmed Riaz Br Dent J Research Aim To calculate fallow time (FT) required following dental aerosol generating procedures (AGPs) in both a dental hospital (mechanically ventilated) and primary care (non-mechanically ventilated). Secondary outcomes were to identify spread and persistence of aerosol in open clinics compared to closed surgeries (mechanically ventilated environment), and identify if extraoral scavenging (EOS) reduces FT and production of aerosol. Methods In vitro simulation of fast handpiece cavity preparations using a manikin was conducted in a mechanically and non-mechanically ventilated environment using Optical Particle Sizer and NanoScan at baseline, during the procedure and fallow period. Results AGPs carried out in the non-mechanically, non-ventilated environment failed to achieve baseline particle levels after one hour. In contrast, when windows were opened after AGPs, there was an immediate reduction in all particle sizes. In mechanically ventilated environments, the baseline levels of particles were very low and particle count returned to baseline within ten minutes following the AGP. There was no detectable difference between particles in mechanically ventilated open bays and closed surgeries. The effect of the EOS on reducing the particle count was greater in the non-mechanically ventilated environment; additionally, it also reduced the spikes in particle counts in mechanically ventilated environments. Conclusion High-efficiency particulate, air-filtered mechanical ventilation, along with mitigation (high-volume suction), resulted in reduction of fallow time (ten minutes). Non-ventilated rooms failed to reach baseline level even after one hour of fallow time. There was no difference in particle counts in open bays or closed surgeries in mechanically ventilated settings with an extraoral suction device reducing particulate spikes. This study confirms that AGPs are not recommended in dental surgeries where no ventilation is possible. Nature Publishing Group UK 2021-08-24 /pmc/articles/PMC8390043/ /pubmed/34446842 http://dx.doi.org/10.1038/s41415-021-3369-1 Text en © The Author(s), under exclusive licence to British Dental Association 2021 This article is made available via the PMC Open Access Subset for unrestricted research re-use and secondary analysis in any form or by any means with acknowledgement of the original source. These permissions are granted for the duration of the World Health Organization (WHO) declaration of COVID-19 as a global pandemic. |
spellingShingle | Research Shahdad, Shakeel Hindocha, Annika Patel, Tulsi Cagney, Neil Mueller, Jens-Dominik Koched, Amine Seoudi, Noha Morgan, Claire Fleming, Padhraig S. Din, Ahmed Riaz Fallow time determination in dentistry using aerosol measurement in mechanically and non-mechanically ventilated environments |
title | Fallow time determination in dentistry using aerosol measurement in mechanically and non-mechanically ventilated environments |
title_full | Fallow time determination in dentistry using aerosol measurement in mechanically and non-mechanically ventilated environments |
title_fullStr | Fallow time determination in dentistry using aerosol measurement in mechanically and non-mechanically ventilated environments |
title_full_unstemmed | Fallow time determination in dentistry using aerosol measurement in mechanically and non-mechanically ventilated environments |
title_short | Fallow time determination in dentistry using aerosol measurement in mechanically and non-mechanically ventilated environments |
title_sort | fallow time determination in dentistry using aerosol measurement in mechanically and non-mechanically ventilated environments |
topic | Research |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8390043/ https://www.ncbi.nlm.nih.gov/pubmed/34446842 http://dx.doi.org/10.1038/s41415-021-3369-1 |
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