Article ; Online: Efficacy of personal protective equipment against coronavirus transmission via dental handpieces.
Journal of the American Dental Association (1939)
2021 Volume 152, Issue 8, Page(s) 631–640
Abstract: ... equipment (PPE) and high-volume evacuation (HVE) against the spread of human coronavirus type 229E (HCoV ... to that of asymptomatic people infected with severe acute respiratory syndrome coronavirus 2. The dental procedure was ... Background: This laboratory study was done to evaluate the efficacy of personal protective ...
| Abstract | Background: This laboratory study was done to evaluate the efficacy of personal protective equipment (PPE) and high-volume evacuation (HVE) against the spread of human coronavirus type 229E (HCoV-229E) during a standard dental procedure. Methods: Patient and operator manikins were used to recreate a dental setting inside a custom-built class III cabinet-like chamber. The mouth of the patient manikin was inoculated with an HCoV-229E suspension, the viral load of which was similar to that of asymptomatic people infected with severe acute respiratory syndrome coronavirus 2. The dental procedure was performed with an air turbine handpiece and HVE for 10 seconds. The efficacy of surgical masks, N95 (filtering facepiece class 2) and filtering facepiece class 3 respirators, and face shields was tested via quantitative real-time polymerase chain reaction. Results: The wide surface on which the inoculum was spread caused low contamination. Over the external surfaces of masks and respirators, when a face shield was not worn, viral loads ranged from 1.2 through 1.4 log Conclusions: All PPE combinations significantly reduced viral loads in the operator manikin's mouth to below the detection limit, but HVE did not decrease viral contamination. Practical implications: Although caution is suggested when removing and disposing of PPE to avoid self-contamination, the combination of PPE and face shields drastically decreases the risk of transmitting human coronavirus during aerosol-generating dental procedures. |
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| MeSH term(s) | Aerosols ; COVID-19 ; Humans ; Personal Protective Equipment ; SARS-CoV-2 | |||||
| Chemical Substances | Aerosols | |||||
| Language | English | |||||
| Publishing date | 2021-03-26 | |||||
| Publishing country | England | |||||
| Document type | Journal Article ; Research Support, Non-U.S. Gov't | |||||
| ZDB-ID | 220622-5 | |||||
| ISSN | 1943-4723 ; 0002-8177 ; 1048-6364 | |||||
| ISSN (online) | 1943-4723 | |||||
| ISSN | 0002-8177 ; 1048-6364 | |||||
| DOI | 10.1016/j.adaj.2021.03.007 | |||||
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| Database | MEDical Literature Analysis and Retrieval System OnLINE |
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