The dental clinic environment is relatively closed, and many aerosols carrying pathogenic microorganisms are generated during the diagnosis and treatment of infectious patients, which increases the infection risk by dental staff. In this study, Serratia marcescens and ΦX174 phage were used as the releasing sources during the oral cleaning process to investigate bioaerosol migration and deposition. The high concentration spatial regions and high concentration deposition areas of bioaerosol in the dental clinic were quantitatively analyzed. The results showed that the highest bioaerosol concentration was located at the S1 sampling point near the mouth of the dentist. At the equipment trays, the two kinds of bioaerosols deposition rates per unit area were as high as 10.5% and 6.6%, respectively. After oral cleaning, it took 90 min to discharge 99.9% of the bioaerosols from the dental clinic. This study could provide some reference for reducing the exposure risk of dental staff in the dental clinic and creating a safe dental clinic environment.

牙科诊所环境相对封闭，在感染患者的诊治过程中会产生许多携带病原微生物的气溶胶，增加了牙科工作人员的感染风险。在本研究中，粘质沙雷氏菌和ΦX174噬菌体在口腔清洁过程中用作释放源以研究生物气溶胶迁移和沉积。定量分析了牙科诊所生物气溶胶的高浓度空间区域和高浓度沉积区域。结果表明，最高生物气溶胶浓度位于牙医口腔附近的 S1 采样点。在设备托盘处，两种生物气溶胶单位面积沉积率分别高达10.5%和6.6%。口腔清洁后，需要 90 分钟才能从牙科诊所排出 99.9% 的生物气溶胶。本研究可为降低牙科诊所牙医工作人员的暴露风险，营造安全的牙科诊所环境提供一定的参考。