Department of Periodontology, Pontificia Universidad Católica Madre y Maestra, Santo Domingo, Dominican Republic,
Department of Periodontology, Pontificia Universidad Católica Madre y Maestra, Santo Domingo, Dominican Republic.
Am J Dent. 2022 Apr;35(2):63-68.
To quantify the biological contamination of a dental operatory environment using a biological tracer.
A Streptococcus mutans suspension was infused into the mouth of a phantom, and an operator performed standardized dental procedures using an air turbine, a contra-angle handpiece, or an ultrasonic scaler either with windows open or closed. The presence of the tracer was measured by placing Petri dishes with a selective medium at 18 sites on the dental unit and 38 sites in the surrounding operatory environment.
The contamination was drastically reduced when windows were opened, no matter which handpiece was used. Air turbine spread significantly higher contamination compared to contra-angle and scaler. All tested instruments spread the tracer over the entire dental unit and the surrounding environment, including the walls and ceiling; however, higher contamination levels were detected on the dental unit compared to the operatory surfaces. Opening windows during dental operative procedures greatly reduced contamination levels for all handpieces and can be recommended for reducing airborne contamination levels.
The significant levels of airborne contamination produced when operating dental handpieces can be significantly reduced by natural ventilation, i.e., simply opening the windows.
使用生物示踪剂定量检测牙科诊室环境中的生物污染。
将变异链球菌悬浮液注入到一个假人的口腔中，然后一名操作人员使用高速手机、弯机或超声洁牙机进行标准化的牙科操作，操作时可以打开或关闭窗户。通过在牙科治疗台上的 18 个位置和周围诊室环境中的 38 个位置放置含有选择性培养基的培养皿来测量示踪剂的存在。
无论使用哪种手机，打开窗户都能显著降低污染。与弯机和超声洁牙机相比，高速手机传播的污染明显更高。所有测试的仪器都会将示踪剂扩散到整个牙科治疗台和周围环境，包括墙壁和天花板；然而，与诊室表面相比，牙科治疗台上检测到的污染水平更高。在牙科操作过程中打开窗户可以显著降低所有手机的污染水平，因此可以推荐使用这种方法来降低空气传播污染水平。
操作牙科手机时产生的大量空气传播污染可以通过自然通风，即简单地打开窗户，显著降低。
