Development of an effective cleaning device in dental unit waterline biofilm

在牙科治疗过程中，管内观察到生物膜的形成，被细菌生物膜污染的水被释放。为此，我们研制了一种具有次氯酸钠清洗和冲刷功能的牙科机组水线清洗装置样机，并对该装置防止牙科机组水线污染的效果进行了检验。配备该装置的装置在安装后6个月内，排出的细菌数量减少，管内没有观察到生物被膜形成。

It has been a matter that biofilm formation was observed inside of the tube in dental unit waterline, and that contaminated water by bacterium biofilm was released in dental treatment. Therefore, we made a prototype of cleaning device equipped with cleaning by sodium hypochlorite and flushing in dental unit waterline, and examined the effect of this device to prevent dental unit waterline contamination. The number of bacteria discharged from the unit equipped with this device was decreased and no biofilm formation was observed inside of the tube during 6 months after installation.