Microbial Air Contamination in Dental Clinics with Different Ventilation Systems
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Abstract
The study aimed to compare the Total Viable Aerobic Count (TVACs) before and during dental procedures in two different ventilation systems, the first systems in a Pre-Upgrade Dental Clinic that has separated air conditioners and standing air purifiers, the second systems in a Special Dental Clinic, and a Post-Upgrade Dental Clinic, which have a centralized ventilation and air purifying systems, with the Index of Microbial Air Contamination (IMA). The data was collected the numbers of bacteria and fungi colony in blood agar (BA) and Sabouraud dextrose agar (SDA). The settle plates were placed 50 cm from a patient’s head, and 1 metre from the wall. Each sampling was placed 1 hour before and during dental procedures, for three days. The Result, in the Special Dental Clinic, the Pre-Upgrade Dental Clinic and the Post-Upgrade Dental Clinic TVACs before and during dental procedures were 71 and 46, 58 and 45, 93 and 15 CFU/dm2/hr, respectively. The Wilcoxon Sign-Rank test showed a statistically significant difference for each setting (p<0.001). Considering three days of data collection, The Kruskal Wallis test indicated that in the Special Dental Clinic (before and during dental procedure) and the Pre-Upgrade Dental Clinic (during procedure), TVACs showed no statistically significant difference. The TVACs showed statistically significant difference in the Pre-Upgrade Dental Clinic (before dental procedure) and the Post-Upgrade Dental Clinic (before and during dental procedure) (p<0.001) Conclusion, the IMA indicated “fair” for the Special Dental Clinic and the Pre-Upgrade Dental Clinic before and during dental procedures. In contrast, the Post-Upgrade Dental Clinic indicated “poor” before dental procedure and “good” in during dental procedure. The TVACs of 2 ventilation systems showed less TVAC during dental procedure than before dental procedure, with a statistically significant.
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บทความ ข้อมูล เนื้อหา รูปภาพ ฯลฯ ที่ได้รับการลงตีพิมพ์ในวิทยาสารทันตแพทยศาสตร์ มหาวิทยาลัยขอนแก่นถือเป็นลิขสิทธิ์เฉพาะของคณะทันตแพทยศาสตร์ มหาวิทยาลัยขอนแก่น หากบุคคลหรือหน่วยงานใดต้องการนำทั้งหมดหรือส่วนหนึ่งส่วนใดไปเผยแพร่ต่อหรือเพื่อกระทำการใด ๆ จะต้องได้รับอนุญาตเป็นลายลักษณ์อักษร จากคณะทันตแพทยศาสตร์ มหาวิทยาลัยขอนแก่นก่อนเท่านั้น
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