Effects of mechanical ventilation and portable air cleaner on aerosol removal from dental treatment rooms
To evaluate the mechanical ventilation rates of dental treatment rooms and assess the effectiveness of aerosol removal by mechanical ventilation and a portable air cleaner (PAC) with a high-efficiency particulate air (HEPA) filter. Volumetric airflow were measured to assess air change rate per hour...
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| Veröffentlicht in: | Journal of dentistry 2021-02, Vol.105, p.103576-103576, Article 103576 |
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| container_title | Journal of dentistry |
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| creator | Ren, Yan-Fang Huang, Qirong Marzouk, Tamer Richard, Ray Pembroke, Karen Martone, Pat Venner, Tom Malmstrom, Hans Eliav, Eli |
| description | To evaluate the mechanical ventilation rates of dental treatment rooms and assess the effectiveness of aerosol removal by mechanical ventilation and a portable air cleaner (PAC) with a high-efficiency particulate air (HEPA) filter.
Volumetric airflow were measured to assess air change rate per hour by ventilation (ACHvent). Equivalent ventilation provided by the PAC (ACHpac) was calculated based on its clean air delivery rate. Concentrations of 0.3, 0.5 and 1.0 μm aerosol particles were measured in 10 dental treatment rooms with various ventilation rates at baseline, after 5-min of incense burn, and after 30-min of observation with and without the PAC or ventilation system in operation. Velocities of aerosol removal were assessed by concentration decay constants for the 0.3 μm particles with ventilation alone (Kn) and with ventilation and PAC (Kn+pac), and by times needed to reach 95 % and 100 % removal of accumulated aerosol particles.
ACHvent varied from 3 to 45. Kn and Kn+pac were correlated with ACHvent (r = 0.90) and combined ACHtotal (r = 0.81), respectively. Accumulated aerosol particles could not be removed by ventilation alone within 30-min in rooms with ACHvent |
| doi_str_mv | 10.1016/j.jdent.2020.103576 |
| format | Article |
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Volumetric airflow were measured to assess air change rate per hour by ventilation (ACHvent). Equivalent ventilation provided by the PAC (ACHpac) was calculated based on its clean air delivery rate. Concentrations of 0.3, 0.5 and 1.0 μm aerosol particles were measured in 10 dental treatment rooms with various ventilation rates at baseline, after 5-min of incense burn, and after 30-min of observation with and without the PAC or ventilation system in operation. Velocities of aerosol removal were assessed by concentration decay constants for the 0.3 μm particles with ventilation alone (Kn) and with ventilation and PAC (Kn+pac), and by times needed to reach 95 % and 100 % removal of accumulated aerosol particles.
ACHvent varied from 3 to 45. Kn and Kn+pac were correlated with ACHvent (r = 0.90) and combined ACHtotal (r = 0.81), respectively. Accumulated aerosol particles could not be removed by ventilation alone within 30-min in rooms with ACHvent<15. PAC reduced aerosol accumulation and accelerated aerosol removal, and accumulated aerosols could be completely removed in 4 to 12-min by ventilation combined with PAC. Effectiveness of the PAC was especially prominent in rooms with poor ventilation. Added benefit of PAC in aerosol removal was inversely correlated with ACHvent.
Aerosol accumulation may occur in dental treatment rooms with poor ventilation. Addition of PAC with a HEPA filter significantly reduced aerosol accumulation and accelerated aerosol removal.
Addition of PAC with a HEPA filter improves aerosol removal in rooms with low ventilation rates.</description><identifier>ISSN: 0300-5712</identifier><identifier>EISSN: 1879-176X</identifier><identifier>DOI: 10.1016/j.jdent.2020.103576</identifier><identifier>PMID: 33388387</identifier><language>eng</language><publisher>England: Elsevier Ltd</publisher><subject>Accumulation ; Aerosols ; Air flow ; Coronaviruses ; COVID-19 ; Decay rate ; Dental aerosols ; Dentistry ; Disease transmission ; Dust ; Efficiency ; HEPA ; Incense ; Infections ; Mechanical ventilation ; Medical research ; Pandemics ; Particle decay ; Patients ; Personal protective equipment ; Portable air cleaner ; Respiration, Artificial ; Ventilation ; Ventilation rate</subject><ispartof>Journal of dentistry, 2021-02, Vol.105, p.103576-103576, Article 103576</ispartof><rights>2021 Elsevier Ltd</rights><rights>Copyright © 2021 Elsevier Ltd. All rights reserved.</rights><rights>2021. Elsevier Ltd</rights><rights>2021 Elsevier Ltd. All rights reserved. 2021 Elsevier Ltd</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c487t-d19c9ed34dca50ca2e0897dc21d4e91ecb0922da128531578b516b4f55f29eb53</citedby><cites>FETCH-LOGICAL-c487t-d19c9ed34dca50ca2e0897dc21d4e91ecb0922da128531578b516b4f55f29eb53</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S0300571220303237$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>230,314,776,780,881,3537,27901,27902,65306</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/33388387$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Ren, Yan-Fang</creatorcontrib><creatorcontrib>Huang, Qirong</creatorcontrib><creatorcontrib>Marzouk, Tamer</creatorcontrib><creatorcontrib>Richard, Ray</creatorcontrib><creatorcontrib>Pembroke, Karen</creatorcontrib><creatorcontrib>Martone, Pat</creatorcontrib><creatorcontrib>Venner, Tom</creatorcontrib><creatorcontrib>Malmstrom, Hans</creatorcontrib><creatorcontrib>Eliav, Eli</creatorcontrib><title>Effects of mechanical ventilation and portable air cleaner on aerosol removal from dental treatment rooms</title><title>Journal of dentistry</title><addtitle>J Dent</addtitle><description>To evaluate the mechanical ventilation rates of dental treatment rooms and assess the effectiveness of aerosol removal by mechanical ventilation and a portable air cleaner (PAC) with a high-efficiency particulate air (HEPA) filter.
Volumetric airflow were measured to assess air change rate per hour by ventilation (ACHvent). Equivalent ventilation provided by the PAC (ACHpac) was calculated based on its clean air delivery rate. Concentrations of 0.3, 0.5 and 1.0 μm aerosol particles were measured in 10 dental treatment rooms with various ventilation rates at baseline, after 5-min of incense burn, and after 30-min of observation with and without the PAC or ventilation system in operation. Velocities of aerosol removal were assessed by concentration decay constants for the 0.3 μm particles with ventilation alone (Kn) and with ventilation and PAC (Kn+pac), and by times needed to reach 95 % and 100 % removal of accumulated aerosol particles.
ACHvent varied from 3 to 45. Kn and Kn+pac were correlated with ACHvent (r = 0.90) and combined ACHtotal (r = 0.81), respectively. Accumulated aerosol particles could not be removed by ventilation alone within 30-min in rooms with ACHvent<15. PAC reduced aerosol accumulation and accelerated aerosol removal, and accumulated aerosols could be completely removed in 4 to 12-min by ventilation combined with PAC. Effectiveness of the PAC was especially prominent in rooms with poor ventilation. Added benefit of PAC in aerosol removal was inversely correlated with ACHvent.
Aerosol accumulation may occur in dental treatment rooms with poor ventilation. Addition of PAC with a HEPA filter significantly reduced aerosol accumulation and accelerated aerosol removal.
Addition of PAC with a HEPA filter improves aerosol removal in rooms with low ventilation rates.</description><subject>Accumulation</subject><subject>Aerosols</subject><subject>Air flow</subject><subject>Coronaviruses</subject><subject>COVID-19</subject><subject>Decay rate</subject><subject>Dental aerosols</subject><subject>Dentistry</subject><subject>Disease transmission</subject><subject>Dust</subject><subject>Efficiency</subject><subject>HEPA</subject><subject>Incense</subject><subject>Infections</subject><subject>Mechanical ventilation</subject><subject>Medical research</subject><subject>Pandemics</subject><subject>Particle decay</subject><subject>Patients</subject><subject>Personal protective equipment</subject><subject>Portable air cleaner</subject><subject>Respiration, Artificial</subject><subject>Ventilation</subject><subject>Ventilation rate</subject><issn>0300-5712</issn><issn>1879-176X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNp9kU1rFTEUhoNY7G31FwgScONmrvmYTJKFQiltFQrdKLgLmeSMzZCZXJO5F_z3ZnprUReucsh5zns-XoReU7KlhHbvx-3oYV62jLD1hwvZPUMbqqRuqOy-PUcbwglphKTsFJ2VMhJCWsL0C3TKOVeKK7lB4WoYwC0FpwFP4O7tHJyN-FCFQ7RLSDO2s8e7lBfbR8A2ZOwi2BkyXnOQU0kRZ5jSodYNOU14narGSwa7TDXGOaWpvEQng40FXj2-5-jr9dWXy0_N7d3N58uL28a1Si6Np9pp8Lz1zgriLAOitPSOUd-CpuB6ohnzljIlOBVS9YJ2fTsIMTANveDn6ONRd7fvJ_CuDpBtNLscJpt_mmSD-Tszh3vzPR2MVLzVVFeBd48COf3YQ1nMFIqDGOvSaV8Ma6UgSopOVvTtP-iY9nmu61VKaUIZobRS_Ei5eqySYXgahhKzWmlG82ClWa00Rytr1Zs_93iq-e1dBT4cAajXPATIprgAswMfcrXU-BT-2-AXfR2y0Q</recordid><startdate>20210201</startdate><enddate>20210201</enddate><creator>Ren, Yan-Fang</creator><creator>Huang, Qirong</creator><creator>Marzouk, Tamer</creator><creator>Richard, Ray</creator><creator>Pembroke, Karen</creator><creator>Martone, Pat</creator><creator>Venner, Tom</creator><creator>Malmstrom, Hans</creator><creator>Eliav, Eli</creator><general>Elsevier Ltd</general><general>Elsevier Limited</general><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7QF</scope><scope>7QP</scope><scope>7QQ</scope><scope>7SE</scope><scope>7SR</scope><scope>7TA</scope><scope>7TB</scope><scope>8BQ</scope><scope>8FD</scope><scope>F28</scope><scope>FR3</scope><scope>H8G</scope><scope>JG9</scope><scope>K9.</scope><scope>7X8</scope><scope>5PM</scope></search><sort><creationdate>20210201</creationdate><title>Effects of mechanical ventilation and portable air cleaner on aerosol removal from dental treatment rooms</title><author>Ren, Yan-Fang ; Huang, Qirong ; Marzouk, Tamer ; Richard, Ray ; Pembroke, Karen ; Martone, Pat ; Venner, Tom ; Malmstrom, Hans ; Eliav, Eli</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c487t-d19c9ed34dca50ca2e0897dc21d4e91ecb0922da128531578b516b4f55f29eb53</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2021</creationdate><topic>Accumulation</topic><topic>Aerosols</topic><topic>Air flow</topic><topic>Coronaviruses</topic><topic>COVID-19</topic><topic>Decay rate</topic><topic>Dental aerosols</topic><topic>Dentistry</topic><topic>Disease transmission</topic><topic>Dust</topic><topic>Efficiency</topic><topic>HEPA</topic><topic>Incense</topic><topic>Infections</topic><topic>Mechanical ventilation</topic><topic>Medical research</topic><topic>Pandemics</topic><topic>Particle decay</topic><topic>Patients</topic><topic>Personal protective equipment</topic><topic>Portable air cleaner</topic><topic>Respiration, Artificial</topic><topic>Ventilation</topic><topic>Ventilation rate</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Ren, Yan-Fang</creatorcontrib><creatorcontrib>Huang, Qirong</creatorcontrib><creatorcontrib>Marzouk, Tamer</creatorcontrib><creatorcontrib>Richard, Ray</creatorcontrib><creatorcontrib>Pembroke, Karen</creatorcontrib><creatorcontrib>Martone, Pat</creatorcontrib><creatorcontrib>Venner, Tom</creatorcontrib><creatorcontrib>Malmstrom, Hans</creatorcontrib><creatorcontrib>Eliav, Eli</creatorcontrib><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>Aluminium Industry Abstracts</collection><collection>Calcium & Calcified Tissue Abstracts</collection><collection>Ceramic Abstracts</collection><collection>Corrosion Abstracts</collection><collection>Engineered Materials Abstracts</collection><collection>Materials Business File</collection><collection>Mechanical & Transportation Engineering Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>ANTE: Abstracts in New Technology & Engineering</collection><collection>Engineering Research Database</collection><collection>Copper Technical Reference Library</collection><collection>Materials Research Database</collection><collection>ProQuest Health & Medical Complete (Alumni)</collection><collection>MEDLINE - Academic</collection><collection>PubMed Central (Full Participant titles)</collection><jtitle>Journal of dentistry</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Ren, Yan-Fang</au><au>Huang, Qirong</au><au>Marzouk, Tamer</au><au>Richard, Ray</au><au>Pembroke, Karen</au><au>Martone, Pat</au><au>Venner, Tom</au><au>Malmstrom, Hans</au><au>Eliav, Eli</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Effects of mechanical ventilation and portable air cleaner on aerosol removal from dental treatment rooms</atitle><jtitle>Journal of dentistry</jtitle><addtitle>J Dent</addtitle><date>2021-02-01</date><risdate>2021</risdate><volume>105</volume><spage>103576</spage><epage>103576</epage><pages>103576-103576</pages><artnum>103576</artnum><issn>0300-5712</issn><eissn>1879-176X</eissn><abstract>To evaluate the mechanical ventilation rates of dental treatment rooms and assess the effectiveness of aerosol removal by mechanical ventilation and a portable air cleaner (PAC) with a high-efficiency particulate air (HEPA) filter.
Volumetric airflow were measured to assess air change rate per hour by ventilation (ACHvent). Equivalent ventilation provided by the PAC (ACHpac) was calculated based on its clean air delivery rate. Concentrations of 0.3, 0.5 and 1.0 μm aerosol particles were measured in 10 dental treatment rooms with various ventilation rates at baseline, after 5-min of incense burn, and after 30-min of observation with and without the PAC or ventilation system in operation. Velocities of aerosol removal were assessed by concentration decay constants for the 0.3 μm particles with ventilation alone (Kn) and with ventilation and PAC (Kn+pac), and by times needed to reach 95 % and 100 % removal of accumulated aerosol particles.
ACHvent varied from 3 to 45. Kn and Kn+pac were correlated with ACHvent (r = 0.90) and combined ACHtotal (r = 0.81), respectively. Accumulated aerosol particles could not be removed by ventilation alone within 30-min in rooms with ACHvent<15. PAC reduced aerosol accumulation and accelerated aerosol removal, and accumulated aerosols could be completely removed in 4 to 12-min by ventilation combined with PAC. Effectiveness of the PAC was especially prominent in rooms with poor ventilation. Added benefit of PAC in aerosol removal was inversely correlated with ACHvent.
Aerosol accumulation may occur in dental treatment rooms with poor ventilation. Addition of PAC with a HEPA filter significantly reduced aerosol accumulation and accelerated aerosol removal.
Addition of PAC with a HEPA filter improves aerosol removal in rooms with low ventilation rates.</abstract><cop>England</cop><pub>Elsevier Ltd</pub><pmid>33388387</pmid><doi>10.1016/j.jdent.2020.103576</doi><tpages>1</tpages><oa>free_for_read</oa></addata></record> |
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| identifier | ISSN: 0300-5712 |
| ispartof | Journal of dentistry, 2021-02, Vol.105, p.103576-103576, Article 103576 |
| issn | 0300-5712 1879-176X |
| language | eng |
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| source | MEDLINE; Elsevier ScienceDirect Journals |
| subjects | Accumulation Aerosols Air flow Coronaviruses COVID-19 Decay rate Dental aerosols Dentistry Disease transmission Dust Efficiency HEPA Incense Infections Mechanical ventilation Medical research Pandemics Particle decay Patients Personal protective equipment Portable air cleaner Respiration, Artificial Ventilation Ventilation rate |
| title | Effects of mechanical ventilation and portable air cleaner on aerosol removal from dental treatment rooms |
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