Department of Preventive and Community Dentistry, Darshan Dental College and Hospital, Loyara, Ranakpur road, Udaipur 313001, India.
J Hosp Infect. 2010 Feb;74(2):99-111. doi: 10.1016/j.jhin.2009.03.027.
Dental chair units (DCUs) are used in the treatment of many patients throughout each day and microbial contamination of specific component parts is an important potential source of cross-infection. The quality of dental unit water is of considerable importance since patients and dental staff are regularly exposed to water and aerosols generated from the dental unit. This water hosts a diverse microflora of bacteria, yeasts, fungi, viruses, protozoa, unicellular algae and nematodes which may be contaminated with micro-organisms found in the biofilm formed due to water stagnation in the narrow-bore dental unit waterline (DUWL) tubings. The water thus contaminated, when used for various treatment procedures through dental handpieces, air/water/three-in-one syringe, etc., produces aerosols that can cause infection. The present review emphasises the risks of infection from DUWL and various water treatment procedures available to disinfect the DUWLs.
牙科椅单位（DCU）在每天的许多患者治疗中使用，特定部件的微生物污染是交叉感染的一个重要潜在来源。牙科器械用水的质量非常重要，因为患者和牙科工作人员经常接触来自牙科器械的水和气溶胶。该水含有多种细菌、酵母、真菌、病毒、原生动物、单细胞藻类和线虫的微生物菌群，这些微生物可能受到由于牙科器械细管内水线（DUWL）狭窄而导致的水停滞形成的生物膜中微生物的污染。受污染的水，当通过牙科机头、气/水/三合一注射器等各种治疗程序使用时，会产生气溶胶，从而导致感染。本综述强调了 DUWL 感染的风险以及各种可用的水处理程序来对 DUWL 进行消毒。
