Abstract:

Dental unit water lines （DUWLs） are always contaminated in routine use，and the output water of dental unit chair （DUC）has been proved to cause the adverse event，such as infection of disease. The people with low immunity have a greater risk in disease infection during dental treatment. At present，China's standards for medical water use in dental treatment have not been issued. Combined with international experience，the limitation of total amount of bacteria of output water from DUWLs can refer to the standards for domestic drinking water. As for management of DUWLs，chemical treatment is the first choice and physical treatment is complementary. The effectiveness and safety of the chemical method and the erosion property of the DUWLs should be considered. Integrated water treatment system could use disinfection factor in low concentration to continuously treat DUWLs with no need of personnel intervention，which is more effective and convenient. It is expected that relevant standards in China will be issued as soon as possible to promote the joint effort of DCU manufacturers，institutional managers and clinical staff in the comprehensive manage to improve the quality of dental treatment water.

Key words: dental unit water lines, contamination, disinfection, total amount of bacteria, infection

摘要：

口腔综合治疗台水路（dental unit water lines，DUWLs）在日常使用中通常存在污染，输出端的诊疗用水已明确可造成疾病感染等不良事件，免疫力低下的人群感染疾病的风险更大。目前，我国医疗用水标准及口腔一般诊疗用水标准尚未出台，结合国际经验，口腔综合治疗台（dental chair unit，DCU）输出水的细菌总量可参考生活饮用水标准。医疗机构应加强对DUWLs的管理，目前以化学方法处理为首选，物理方法为配合补充。化学方法的有效性、安全性、对水路系统材质的蚀损性等应为重点考量因素。集成式水处理系统采用低浓度消毒因子对水路持续进行处理，无需医务人员干预，其有效性、便捷性较为明显，现阶段应用具有独特优势。期待我国相关标准尽快出台，促进DCU生产者、机构管理者、临床医务人员等共同关注口腔诊疗用水质量提升。

关键词: 口腔综合治疗台水路, 污染, 消毒, 细菌总量, 感染