民营口腔医疗机构口腔用水污染现状

目的 了解北京市某城区民营口腔医疗机构口腔用水污染现状，为提高口腔用水质量提供理论依据。方法 2019年11月1—30日采用分层随机抽样的方法，选择30所民营口腔医疗机构进行口腔用水的现场采集，检测方法参照GB/T 5750.12-2006《生活饮用水标准检验方法》，判定标准参照GB 5479-2006《生活饮用水标准》。结果 共采集30所民营口腔医疗机构水样264份，合格水样76份，合格率28.79%。手机水和储水瓶水的菌落总数中位数均在2 000 CFU/mL左右，手机水水样合格率（18.33%）高于储水瓶（9.09%）；进口综合治疗台和国产综合治疗台水样的菌落总数中位数分别为255、1 750 CFU/mL，进口综合治疗台水样合格率（42.39%）高于国产综合治疗台（21.51%）；自来水和储水瓶水菌落总数中位数分别为400、2 100 CFU/mL，自来水水样合格率（35.82%）高于储水瓶（12.16%）。结论 北京市此城区民营口腔医疗机构口腔用水污染严重，建议尽快制定口腔医疗机构相关标准规范，提高口腔用水卫生质量。

Contamination status of dental water in private dental institutions

Objective To understand contamination status of dental water in private dental institutions in one district of Beijing, and provide reference for improving dental water quality. Methods From November 1 to 30, 2019, stratified random sampling method was used to select 30 private dental institutions for on-site dental water collection, detection method was in accordance with GB/T 5750.12-2006 Standard Test Method for Drinking Water, judgment criterion was referred to GB 5479-2006 Standard for Drinking Water Quality. Results A total of 264 dental water specimens were collected from 30 private dental institutions, 76 dental water specimens were qualified, with a qualified rate of 28.79%. The median of the tatal number of colonies in water in dental handpiece and water-storage bottle was about 2 000 CFU/mL, the qualified rate of dental handpiece water specimens was higher than that of water-storage bottle (18.33% vs 9.09%); the median of the total number of colonies in water specimens of imported and domestic dental chair units (DCUs) were 255 and 1 750 CFU/mL respectively; qualified rate of water specimens of imported DCUs was higher than that of domestic DUCs(42.39% vs 21.51%); the median of the total number of colonies in tap water and water in water-storage bottle were 400 and 2 100 CFU/mL respectively, qualified rate of tap water specimens was higher than that of water-storage bottle (35.82% vs 12.16%). Conclusion Dental water in private dental medical institutions in this district of Beijing is seriously contaminated, it is suggested that the relevant standards and specifications of dental medical institutions should be formulated as soon as possible, so as to improve the quality of dental water sanitation.