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Dissemination of Aerosol and Splatter in Clinical Environment during Cavity Preparation: An In Vitro Study

Author

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  • Muhammad Adeel Ahmed

    (Department of Restorative Dentistry and Endodontics, College of Dentistry, King Faisal University, Al-Ahsa 31982, Saudi Arabia)

  • Rizwan Jouhar

    (Department of Restorative Dentistry and Endodontics, College of Dentistry, King Faisal University, Al-Ahsa 31982, Saudi Arabia)

Abstract

Dental health care workers around the world are in a constant state of fear and anxiety because they work in a constrained space of the dental practice. During routine dental procedures, they are exposed to aerosol and splatter. These airborne particles pose a great risk of transmitting contagious infections to health care workers and patients, especially in an era of social distancing due to COVID-19. The current study was conducted to evaluate contamination amount, duration, the distance of aerosol, and splatter produced after cavity preparation using a two-hole and four-hole handpiece. The study was performed on a dental manikin in a dental simulation laboratory at the College of Dentistry, King Faisal University Al Ahsa. The dental manikin was set to a reclined position to simulate the clinical operatory position of the patient for dental restorative procedures. Aerosol and splatter were collected on Grade 1 qualitative cotton cellulose filter paper. These were placed on adhesive tape extending from the headrest of the dental manikin in six different directions (2, 4, 6, 8, 10, and 12 o’clock) for up to 60 inches and on certain positions of the operator and assistant such as the chest, head, forearms, upper leg, and inside facemask. Class V cavity preparation was done by the principal investigator at a specific time of 3 min on tooth #11 using a two-hole high-speed handpiece, then on the next day, Class V cavity preparation was performed on tooth #21 by a four-hole handpiece. High volume suction was used throughout the cavity preparation. Immediately after cavity preparation, the first filter paper disc was replaced with new ones in all positions. The second set of filter papers was removed after 30 min. Transparent grids were used to count the contamination area on the filter paper disc. No statistically significant difference was found in the mean amount of aerosol and splatter produced by both handpieces, however, a statistically significant difference was found in an amount of aerosol and splatter produced at a 12, 24, and 36 inches distance immediately after cavity preparation and 30 min after cavity preparation, regardless of the type of handpiece used. It is advisable to refrain from removing the personal protective barriers immediately after the procedure within the vicinity of the dental practice. The use of other adjuncts such as high volume suction to reduce the spread of aerosol and splatter is also recommended.

Suggested Citation

  • Muhammad Adeel Ahmed & Rizwan Jouhar, 2021. "Dissemination of Aerosol and Splatter in Clinical Environment during Cavity Preparation: An In Vitro Study," IJERPH, MDPI, vol. 18(7), pages 1-9, April.
    • Handle: RePEc:gam:jijerp:v:18:y:2021:i:7:p:3773-:d:530150
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    5. Muhammad Adeel Ahmed & Rizwan Jouhar & Naseer Ahmed & Samira Adnan & Marziya Aftab & Muhammad Sohail Zafar & Zohaib Khurshid, 2020. "Fear and Practice Modifications among Dentists to Combat Novel Coronavirus Disease (COVID-19) Outbreak," IJERPH, MDPI, vol. 17(8), pages 1-11, April.
    6. Monika Tysiąc-Miśta & Arkadiusz Dziedzic, 2020. "The Attitudes and Professional Approaches of Dental Practitioners during the COVID-19 Outbreak in Poland: A Cross-Sectional Survey," IJERPH, MDPI, vol. 17(13), pages 1-17, June.
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