Abstract：
Water contamination in dental unit waterlines (DUWLs) is a potential source of healthcare-associated infection during dental care. The aim of this study was to evaluate the microbiological quality of DUWLs water from newly installed dental chairs in a French University Hospital. The microbiological quality of water from 24 new DUWLs initially disinfected by ICX Renew-prior to use of the dental units for patient treatment-was assessed for total culturable aerobic bacteria at 22°C and 36°C, Legionella sp., Pseudomonas aeruginosa, and total coliforms. Among the 24 samples analyzed, 21 were compliant with the water quality levels: 19 had no bacteria, and 2 contained only 4 and 1 CFU/mL for total culturable aerobic bacteria at 22°C and 36°C, respectively. Three samples were non-compliant due to contamination by P. aeruginosa (4, 2, and 2 CFU/100 mL). Controlling and preventing the microbiological contamination of DUWLs, especially by pathogenic bacteria, at the time of the installation of the new dental chairs are crucial to prevent healthcare-associated infection in dentistry.
OBJECTIVE: Dental unit waterlines (DUWLs) of new dental chairs may be contaminated before their first clinical use, so an initial shock disinfection is crucial at the time of their installation. The microbiological analyses are crucial to control the water quality of DUWLs before their first clinical use because their disinfection does not guarantee the elimination of all bacteria.
OBJECTIVE: Dental unit waterlines (DUWLs) of new dental chairs may be contaminated before their first clinical use, so an initial shock disinfection is crucial at the time of their installation. The microbiological analyses are crucial to control the water quality of DUWLs before their first clinical use because their disinfection does not guarantee the elimination of all bacteria.
摘要：
牙科单元水线（DUWL）中的水污染是牙科护理期间与医疗保健相关的感染的潜在来源。这项研究的目的是评估法国大学医院新安装的牙科椅中DUWL水的微生物质量。在使用牙科设备进行患者治疗之前，最初经ICXRenew消毒的24种新DUWL的水的微生物质量在22°C和36°C下评估了总的可培养需氧细菌，军团菌。,铜绿假单胞菌,和总的大肠杆菌。在分析的24个样本中，21个符合水质水平：19个没有细菌，对于22°C和36°C的总可培养好氧细菌，2只含有4和1CFU/mL，分别。由于铜绿假单胞菌的污染(4、2和2CFU/100mL),三个样品不符合。控制和预防DUWLs的微生物污染，尤其是病原菌，在安装时，新的牙科椅对于防止牙科医疗相关感染至关重要。
目的：新牙科椅的牙科单元水线（DUWL）在首次临床使用之前可能会受到污染，因此，在安装时，最初的冲击消毒至关重要。微生物分析对于在首次临床使用之前控制DUWL的水质至关重要，因为它们的消毒不能保证消除所有细菌。
目的：新牙科椅的牙科单元水线（DUWL）在首次临床使用之前可能会受到污染，因此，在安装时，最初的冲击消毒至关重要。微生物分析对于在首次临床使用之前控制DUWL的水质至关重要，因为它们的消毒不能保证消除所有细菌。
