{"id":231,"date":"2021-11-11T16:39:24","date_gmt":"2021-11-11T16:39:24","guid":{"rendered":"https:\/\/blogs.ncl.ac.uk\/jamesallison\/?p=231"},"modified":"2021-11-12T11:32:25","modified_gmt":"2021-11-12T11:32:25","slug":"iadr-local-exhaust-ventilation-to-control-dental-aerosols-and-droplets","status":"publish","type":"post","link":"https:\/\/blogs.ncl.ac.uk\/aerosols\/2021\/11\/11\/iadr-local-exhaust-ventilation-to-control-dental-aerosols-and-droplets\/","title":{"rendered":"IADR: Local Exhaust Ventilation to Control Dental Aerosols and Droplets"},"content":{"rendered":"\n

A press release from the International Association for Dental Research<\/a> (IADR) has highlighted a study<\/a> looking at Local Exhaust Ventilation (LEV) from the Newcastle Dental Aerosols Research Group.<\/p>\n\n\n\n

\"\"
The team conduct experiments using the Local Exhaust Ventilation device during dental procedures.<\/figcaption><\/figure>\n\n\n\n

Ten-minute crown preparations were performed on a dental mannequin with an air-turbine handpiece in a large open plan clinic, and full mouth ultrasonic scaling was performed for ten minutes in a single dental surgery. Fluorescein was added to instrument irrigation reservoirs as a tracer. In both settings, Optical Particle Counters (OPCs) were used to measure aerosol particles between 0.3 \u2013 10.0 \u03bcm and liquid cyclone air samplers were used to capture aerosolised fluorescein tracer. An LEV device with High Efficiency Particulate Air (HEPA) filtration and a flow rate of 5,000 L\/min was tested during the experiments.<\/p>\n\n\n\n

“This study shows that the effect of LEV was substantially greater than suction alone for the air-turbine and was similar to the effect of suction for the ultrasonic scaler. While no mitigation measure alone will completely eliminate risk, LEV appears to be a useful approach, which in addition to other measures, substantially reduces dispersion of aerosols, and therefore risk of exposure to pathogens.”<\/p>IADR President, Professor Eric Reynolds; The University of Melbourne, Australia<\/cite><\/blockquote><\/figure>\n\n\n\n

The results show that using LEV reduced the dispersion of aerosols from the air turbine handpiece by 90% within 0.5 m, and this was 99% for the ultrasonic scaler. The settling of larger droplets was also measured for the air-turbine, and this was reduced by 95% within 0.5 m when LEV was used.<\/p>\n\n\n\n

\"\"
Detail of fluorescein tracer used during experiments, and the inlet of the LEV device.<\/figcaption><\/figure>\n\n\n\n

<\/p>\n","protected":false},"excerpt":{"rendered":"

A press release from the International Association for Dental Research (IADR) has highlighted a study looking at Local Exhaust Ventilation (LEV) from the Newcastle Dental Aerosols Research Group. Ten-minute crown preparations were performed on a dental mannequin with an air-turbine handpiece in a large open plan clinic, and full mouth ultrasonic scaling was performed for […]<\/p>\n","protected":false},"author":8160,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[23,9],"tags":[19,14,25,24],"class_list":["post-231","post","type-post","status-publish","format-standard","hentry","category-media","category-publications","tag-aerosol-generating-procedures","tag-bioaerosols","tag-dental-research","tag-iadr"],"_links":{"self":[{"href":"https:\/\/blogs.ncl.ac.uk\/aerosols\/wp-json\/wp\/v2\/posts\/231","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blogs.ncl.ac.uk\/aerosols\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blogs.ncl.ac.uk\/aerosols\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blogs.ncl.ac.uk\/aerosols\/wp-json\/wp\/v2\/users\/8160"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.ncl.ac.uk\/aerosols\/wp-json\/wp\/v2\/comments?post=231"}],"version-history":[{"count":4,"href":"https:\/\/blogs.ncl.ac.uk\/aerosols\/wp-json\/wp\/v2\/posts\/231\/revisions"}],"predecessor-version":[{"id":277,"href":"https:\/\/blogs.ncl.ac.uk\/aerosols\/wp-json\/wp\/v2\/posts\/231\/revisions\/277"}],"wp:attachment":[{"href":"https:\/\/blogs.ncl.ac.uk\/aerosols\/wp-json\/wp\/v2\/media?parent=231"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogs.ncl.ac.uk\/aerosols\/wp-json\/wp\/v2\/categories?post=231"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogs.ncl.ac.uk\/aerosols\/wp-json\/wp\/v2\/tags?post=231"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}