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Methodology for Addressing Infectious Aerosol Persistence in Real-Time Using Sensor Network.

Sepehr Makhsous1, Joelle M Segovia1, Jiayang He1

  • 1Department of Mechanical Engineering, University of Washington, 3900 E Stevens Way NE, Seattle, WA 98195, USA.

Sensors (Basel, Switzerland)
|July 2, 2021
PubMed
Summary
This summary is machine-generated.

Dental procedures create infectious aerosols. While High-Efficiency Particle Air (HEPA) filters showed minimal impact, Extra-Oral Suction Devices (EOSD) reduced aerosol particles by 16%, improving dental operatory safety.

Keywords:
aerosolsair qualitydental clinicsdispersion modelingexposure assessmentextra-oral suction devicehigh-volume evacuationinfection controlparticle concentrationsensor network

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Area of Science:

  • Environmental Health
  • Infectious Disease Transmission
  • Dental Public Health

Background:

  • Dental procedures generate infectious aerosols, posing a significant transmission risk for diseases like COVID-19.
  • Existing interventions like area filters and extraoral suction devices are used, but their effectiveness in dental settings remains unquantified.
  • Dental personnel face challenges in optimally positioning and operating these aerosol-mitigating devices.

Purpose of the Study:

  • To assess the effectiveness of High-Efficiency Particle Air (HEPA) filters and Extra-Oral Suction Devices (EOSD) in reducing aerosol concentrations during dental procedures.
  • To evaluate the utility of a real-time sensor network and 3D visualization for analyzing aerosol dynamics in dental operatories.
  • To provide data-driven insights for developing evidence-based aerosol intervention strategies in dental environments.

Main Methods:

  • A real-time sensor network with 13 fixed and 1 wearable sensor was deployed in a dental operatory.
  • Particulate matter (PM) data was collected during dental restoration and cleaning procedures, with and without HEPA filters or EOSD.
  • Three-dimensional (3D) visualization was used to map aerosol persistence and distribution within the operatory.

Main Results:

  • Local area HEPA filters did not significantly reduce overall aerosol concentration in the dental operatory.
  • The use of Extra-Oral Suction Devices (EOSD) resulted in an average decrease of 16% in particulate matter concentration.
  • Real-time sensor data and 3D visualization effectively mapped aerosol dynamics and intervention impacts.

Conclusions:

  • Extra-Oral Suction Devices (EOSD) demonstrate measurable effectiveness in reducing aerosolized particles during dental procedures.
  • Area HEPA filters appear less effective than EOSD for aerosol mitigation in dental operatories.
  • Integrated sensor networks and visualization tools offer valuable feedback for optimizing aerosol control strategies in healthcare settings.