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Letter to the Editor

A new protective barrier to reduce the aerosol dispersion in dental clinics during Omicron Covid-19 pandemic

Teng, Wei-Chia; Chu, Ya-Chunb,c; Tseng, Jen-Yud,c; Lai, Hsien-Yunga,*

Author Information
Journal of the Chinese Medical Association: July 2022 - Volume 85 - Issue 7 - p 808-809
doi: 10.1097/JCMA.0000000000000754


Dental professionals are exposed to very high risks of infection by Covid-19 during clinical work. Because the exposure to saliva, blood, and other body fluids combined with the handling of sharp instruments and procedures all generate aerosols. The use of high-speed handpieces and ultrasonic tips causes more aerosols of saliva particles, blood, and other fluids.1

Due to the above characteristics of dental procedures, standard protective equipment in daily clinical work may not be effective enough to prevent the transmission of COVID-19 virus, especially when Omicron virus cause the patients asymptomatic and ignore they are infected.

There are several protection devices been developed for dental clinics includes aerosol box or shield.2,3 But most of them would hinder the way a lot of procedures that would be not practical for clinical use. Due to our previous rich experiences in protective barrier enclosure innovation4-6; thus, we design a new type of protective barrier especially suitable for dental procedures.

A height-adjustable metal bracket with four wheels helps adjust the height of the table to the preference of operators and facilitates moving the transparent tent while necessary (Fig. 1). We use transparent plastic drape covering the metal bracket to form a tent. There are apertures in each side of plastic drape in order for the entrance of the operator and assistants’ hands. This time we selected plastic drape but not previous acrylic material is because that in dental clinical procedures, most patients are wide awake, the solid acrylic aerosol box sometimes causes patient discomfort, especially when the patients are claustrophobia. The other benefit of this plastic tent is it is simple in design, easy to assemble, and disposable for one use, do not worry about the cross-contamination problem caused by disinfection.

Although using any sort of barrier in a clinical procedure requires work style adjustment, this dental barrier has been tested and practiced by many dentists clinically, they consider this tent provides good protection for aerosol spread during procedures and interfere the service at an acceptable range. The demonstration of this barrier in clinical practice was provided in the Supplementary Appendix (

Taiwan has seen a spike in Covid-19 cases since April 2022, after its government chose to move away from its zero-tolerance approach to begin living with the coronavirus. The Covid-19 pandemic is not likely going to disappear and can potentially become a seasonal or endemic foe. Furthermore, infected asymptomatic and mildly symptomatic still confer a high risk of transmission. The first-line healthcare workers face strong impact of medical overload and more and more infective risks of dental doctors and assistants during their routine services. We hope this special designed barrier for dental clinics could provide extra protection during this pandemic.

Fig. 1:
Specification of the dental barrier, it is assembled easily with height-adjustable metal bracket with four wheels (A, B).


Supplementary data related to this article can be found at


1. Mañón VA, Tran A, Sifri ZC, Aziz SR. Resuming dental and craniomaxillofacial surgical missions during the COVID-19 pandemic: guidelines and recommendations. Craniomaxillofac Trauma Reconstr. 2021;14:289–98.
2. Babu B, Gupta S, Sahni V. Aerosol box for dentistry. Br Dent J. 2020;228:660.
3. Teichert-Filho R, Baldasso CN, Campos MM, Gomes MS. Protective device to reduce aerosol dispersion in dental clinics during the COVID-19 pandemic. Int Endod J. 2020;53:1588–97.
4. Lai HY, Cheng ML, Hsu SH. Protective barrier enclosure during upper gastrointestinal endoscopy. J Chin Med Assoc. 2020;83:972.
5. Tseng JY, Hsu SH, Lai HY. Disposable protective barrier enclosure prevent aerosol contamination during aerosol-generating procedures. J Chin Med Assoc. 2021;84:119–20.
6. Tseng JY, Hsu SH, Lai HY. A disposable envelope for video-assisted intubating stylet during tracheal intubation in COVID-19 pandemic. J Chin Med Assoc. 2022;85:136.
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