Al Maghlouth Adnan, Al Yousef Yousef, Al-Bagieh Nasir Hamad
College of Dentistry, King Saud University, Riyadh, Kingdom of Saudi Arabia.
Quintessence Int. 2007 May;38(5):e222-8.
To investigate qualitatively and quantitatively the bacterial aerosols before, during, and after clinical work sessions in different areas within a multichair dental clinic, an isolation clinic, the sterilization center, and the prosthetic laboratory in the College of Dentistry, King Saud University. In addition, the contributions of aerosols generated by different types of dental procedures were investigated.
Air sampling using blood and heart infusion agar plates at 4 selected areas was performed 3 times per day over a 2-week period before, during, and after clinical sessions.
The concentration of total bacterial aerosols was 5 times higher in the multichair clinic, 3.6 times higher in the prosthetic laboratory, and 2 times higher in the sterilization center and isolation clinic during working sessions as compared to before the working sessions. At the end of the working day, aerosols decreased 50% to 70% in all areas. Staphylococcus epidermidis had the highest prevalence (37.1%) of colony composition of bacteria examined.
This study demonstrates that aerosols increase during and after work sessions and therefore increase the chance for infectious agent transmission. Preventive measures should be instituted to reduce or disrupt aerosols as a transmission route in the multichair dental clinic, sterilization center, prosthetic laboratory, and isolation clinic.
对沙特国王大学牙科学院的多椅位牙科诊所、隔离诊所、消毒中心和义齿加工实验室等不同区域临床工作期间及前后的细菌气溶胶进行定性和定量研究。此外，还研究了不同类型牙科操作产生的气溶胶的影响。
在临床工作前、期间和后的2周内，每天3次在4个选定区域使用血心浸液琼脂平板进行空气采样。
与工作前相比，多椅位诊所工作期间的总细菌气溶胶浓度高出5倍，义齿加工实验室高出3.6倍，消毒中心和隔离诊所高出2倍。工作日结束时，所有区域的气溶胶减少了50%至70%。表皮葡萄球菌在所检测细菌菌落组成中的患病率最高（37.1%）。
本研究表明，工作期间及之后气溶胶会增加，从而增加了传染因子传播的机会。应采取预防措施，减少或阻断多椅位牙科诊所、消毒中心、义齿加工实验室和隔离诊所中作为传播途径的气溶胶。
