Removal efficiency of central vacuum system and protective masks to suspended particles from dental treatment


Autoři: Ming-Hui Liu aff001;  Chi-Tsung Chen aff002;  Li-Chuan Chuang aff003;  Wen-Ming Lin aff004;  Gwo-Hwa Wan aff005
Působiště autorů: Department of Pediatric Dentistry, Taoyuan Chang Gung Memorial Hospital, Taoyuan, Taiwan aff001;  Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang Gung University, Taoyuan, Taiwan aff002;  Department of Pediatric Dentistry, Linkou Chang Gung Memorial Hospital, Taoyuan, Taiwan aff003;  Department of General Practice Dentistry, Taoyuan Chang Gung Memorial Hospital, Taoyuan, Taiwan aff004;  Department of Respiratory Therapy, College of Medicine, Chang Gung University, Taoyuan, Taiwan aff005;  Department of Respiratory Care, Chang Gung University of Science and Technology, Chiayi, Taiwan aff006;  Department of Obstetrics and Gynaecology, Taipei Chang Gung Memorial Hospital, Taipei, Taiwan aff007
Vyšlo v časopise: PLoS ONE 14(11)
Kategorie: Research Article
doi: 10.1371/journal.pone.0225644

Souhrn

Background

High levels of suspended particulate matters (PMs) and bioaerosols are created by dental procedures. The present study aimed to evaluate the size and concentration of PMs produced by drilling and grinding teeth, and to assess the efficiency of central vacuum system and protective masks for the removal of PMs.

Methods

A total of 20 extracted permanent teeth were collected. A novel experimental system and particle counter were used to evaluate the PMs produced by dental procedures and the PM removal efficiency of a central vacuum system and surgical/N95 masks.

Results

The number concentration of total PMs produced by drilling and grinding teeth was significantly higher than the indoor background concentration. The average aerodynamic diameter of particle was generally less than 1 μm. The average number concentration of ultrafine particles was 2.1x1011 particles/m3 during tooth drilling and grinding. The efficiency of the central vacuum system was 35.74% for PM≥0.5 and 35.41% for PM10. For PM≥0.5, the ratios of inside and outside masks were 0.8–1.34 without vacuum and 1.18–1.36 with vacuum. No difference was found with the use of surgical/N95 masks during dental therapy, with or without vacuum use.

Conclusions

High levels of PMs were found during tooth drilling and grinding procedures, especially among PM1. The PM removal efficiency of a central vacuum system and surgical/N95 masks were limited.

Klíčová slova:

Aerodynamics – Aerosols – Dental and oral procedures – Dentition – Nanoparticles – Particulates – Teeth – Respirators


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Článek vyšel v časopise

PLOS One


2019 Číslo 11