用过氧化氢对牙科设备水系统进行消毒。
Decontamination of dental unit water systems with hydrogen peroxide.
作者信息
Zanetti F, De Luca G, Tarlazzi P, Stampi S
机构信息
Department of Medicine and Public Health, Division of Hygiene, University of Bologna, Bologna, Italy.
出版信息
Lett Appl Microbiol. 2003;37(3):201-6. doi: 10.1046/j.1472-765x.2003.01378.x.
AIMS
Transmission of microbial pathogens to patients from water in dental units is a concern. To reduce this risk, the decontaminating efficiency of hydrogen peroxide was evaluated.
METHODS AND RESULTS
Three percent hydrogen peroxide diluted 1 : 4 in distilled water (contact time 15 min) was used daily to disinfect the waterlines of a pilot unit previously contaminated with Pseudomonas aeruginosa or Staphylococcus aureus. The behaviour of the test bacteria was seen to differ over time. Staph. aureus numbers slowly decreased until only low numbers were recovered, after which the levels remained stable. Ps. aeruginosa abatement was more rapid and the density of the bacteria reached a peak when the circuit was empty.
CONCLUSIONS
Staph. aureus and Ps. aeruginosa treated with hydrogen peroxide fell from 6 to 4 log.
SIGNIFICANCE AND IMPACT OF THE STUDY
Treatment of dental unit waterlines with hydrogen peroxide was seen to be able to keep the number of the bacteria under control, as long as the treatment was repeated daily.
目的
牙科设备中的水将微生物病原体传播给患者是一个令人担忧的问题。为降低这种风险，评估了过氧化氢的去污效率。
方法与结果
每天使用在蒸馏水中按1:4稀释的3%过氧化氢（接触时间15分钟）对先前被铜绿假单胞菌或金黄色葡萄球菌污染的试验设备的水管进行消毒。试验细菌的行为随时间而异。金黄色葡萄球菌数量缓慢下降，直到仅回收少量细菌，此后数量保持稳定。铜绿假单胞菌的减少更为迅速，当回路为空时细菌密度达到峰值。
结论
用过氧化氢处理的金黄色葡萄球菌和铜绿假单胞菌数量从6 log降至4 log。
研究的意义和影响
只要每天重复处理，用过氧化氢处理牙科设备水管能够控制细菌数量。
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