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Introduction;External high volume extraction devices may offer a way to reduce any aerosol particulate generated.Aims;The aim of this study was to measure the particle count during dental aerosolprocedures and compare the results to when a High Volume Extraction device is used.Design;A comparative clinical study measuring the amount of PM1, PM2.5 and PM10 aerosol particulate with and without the use of an external High Volume Extraction device was undertaken.Materials and methods;In total, 10 restorative procedures were monitored with an an industrial Trotec PC220 particle counter.Interventions;An external High Volume Extraction device.Main outcome methods;The air sampler was placed at the average working distance of the clinicians involved in the study - 420mm.Results;In the present study aerosol particulate was recorded at statistically significantly increased levels during dental procedures without an external high volume extractio device versus with the device.Discussion;The null hypothesis was rejected, in that significant differences were found between the results of the amount of aerosol particle count with and without a High Volume Extraction device.Conclusion;If the results of the present study are repeated in an in vivo setting, an external high volume suction device may potentially lower the risk of transmission of viral particulate.

(1) Introduction: External high volume extraction devices may offer a way to reduce any aerosol particulate generated. The aim of this study was to measure the particle count during dental aerosol procedures and compare the results to when a High Volume Extraction device is used; (2) Methods: A comparative clinical study measuring the amount of PM1, PM2.5 and PM10 aerosol particulate with and without the use of an external High Volume Extraction device was undertaken. In total, 10 restorative procedures were monitored with an an industrial Trotec PC220 particle counter. The air sampler was placed at the average working distance of the clinicians involved in the study - 420mm.; (3) Results: In the present study aerosol particulate was recorded at statistically significantly increased levels during dental procedures without an external high volume extraction device versus with the device. The null hypothesis was rejected, in that significant differences were found between the results of the amount of aerosol particle count with and without a High Volume Extraction device.; (4) Conclusion: If the results of the present study are repeated in an in vivo setting, an external high volume suction device may potentially lower the risk of transmission of viral particulate.