Baudet Alexandre, Lizon Julie, Lozniewski Alain, Florentin Arnaud, Mortier Éric
Université de Lorraine, Faculté d'odontologie, 54500, Vandœuvre-Lès-Nancy, France.
CHRU-Nancy, Service d'odontologie, 54000, Nancy, France.
BMC Microbiol. 2024 Dec 19;24(1):529. doi: 10.1186/s12866-024-03678-7.
Bacterial contamination of outlet water from dental unit waterlines (DUWLs) may lead to healthcare-associated infection. The aim of this study was to evaluate the contamination of DUWLs from new dental chairs before and after their initial shock disinfection with ICX Renew® and to determine the efficacy of this method of shock disinfection.
The microbiological quality of water samples obtained from the DUWLs of 17 new dental chairs installed at the University Hospital of Nancy, France, was assessed. Water samples were collected before and after an initial shock disinfection with one ICX Renew® treatment. Water analysis was used to assess total culturable aerobic bacteria (TCAB) at 22°C and 36°C, Legionella sp., Pseudomonas aeruginosa and total coliforms.
All the DUWLs (17/17) were contaminated by viable aerobic bacteria (TCAB at 22°C and 36°C > 300 CFU/mL), including P. aeruginosa, before shock disinfection. After shock disinfection with ICX Renew®, 24% of DUWLs (4/17) remained contaminated by aerobic bacteria (TCAB at 36°C > 300 CFU/mL for 3/17) and P. aeruginosa (> 100 CFU/100 mL for 1/17).
To reduce the contamination of new dental chairs, initial shock disinfection of DUWLs should be performed to remove biofilms and bacteria from the DUWLs. To ensure the security of care, microbiological analysis of outlet water from DUWLs should be systematically performed before the first clinical use of a new dental chair to determine the efficacy of shock disinfection and the agreement of the results with the dental recommendations for water quality.
Not applicable.
牙科设备水线（DUWLs）的出水细菌污染可能导致医疗相关感染。本研究的目的是评估新型牙科椅初始使用ICX Renew®进行冲击消毒前后DUWLs的污染情况，并确定这种冲击消毒方法的效果。
对法国南锡大学医院安装的17把新型牙科椅的DUWLs采集的水样进行微生物质量评估。在使用一次ICX Renew®进行初始冲击消毒前后采集水样。采用水分析方法评估22°C和36°C下的总需氧培养细菌（TCAB）、嗜肺军团菌、铜绿假单胞菌和总大肠菌群。
在冲击消毒前，所有DUWLs（17/17）均被需氧活菌污染（22°C和36°C下的TCAB > 300 CFU/mL），包括铜绿假单胞菌。使用ICX Renew®进行冲击消毒后，24%的DUWLs（4/17）仍被需氧细菌污染（3/17的DUWLs在36°C下的TCAB > 300 CFU/mL），1/17的DUWLs铜绿假单胞菌污染（> 100 CFU/100 mL）。
为减少新型牙科椅的污染，应进行DUWLs的初始冲击消毒以清除水线中的生物膜和细菌。为确保医疗安全，在新型牙科椅首次临床使用前，应系统地对DUWLs的出水进行微生物分析，以确定冲击消毒的效果以及结果是否符合牙科水质建议。
不适用。
