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目的:研究ICXn ?片对控制牙科治疗用水污染的效果。n 方法:采用便利抽样法，选择某口腔专科医院在2018年9月30日—2019年2月23日新投入使用的牙体牙髓专业品牌为A-dec的DCU进行编号，采用随机数字表法抽取4台DCU纳入本研究，其中试验组2台，对照组2台。对照组2台DCU独立储水罐添加蒸馏水，试验组2台DCU独立储水罐添加蒸馏水与ICXn ?片。从临床使用第1天开始持续采集水样，连续采样7 d，其中ICXn ?片组连续采样12周，进行细菌培养，统计其菌落数量和合格率。n 结果:共采集水样280份，使用添加了ICXn ?片的蒸馏水作为牙科治疗用水的全新牙科综合治疗台水路出水端菌落数量第1天开始低于蒸馏水组，差异有统计学意义（n P=0.007）；使用添加了ICXn ?片的蒸馏水作为牙科治疗用水的全新牙科综合治疗台水路出水端菌落数量合格率第2天开始高于蒸馏水组，差异有统计学意义（n P=0.007）。n 结论:ICXn ?片可有效控制牙科治疗用水污染，能长期将牙科治疗用水中菌落数量控制在较低水平，但仍需结合定期监测和强化消毒。n “,”Objective:To explore the effect of ICXn ? tablets on controlling the pollution of dental unit waterlines.n Methods:From September 30, 2018 to February 23, 2019, convenience sampling was used to select dental chair unit (DCU) with the dental pulp professional brand of A-dec which was newly put into use in a stomatology hospital for numbering. Using the method of random number table, four DCUs were selected and included in this study, including two in experimental group and two incontrol group. In control group, distilled water was added into two DCUs in dependent water storage tanks. In experimental group, two DCUs independent water storage tanks were added with distilled water and ICXn ? tablets. From the first day of clinical use, water samples were collected continuously for 7 days, and the ICXn ? tablets group was continuously sampled for 12 weeks for bacterial culture, and the number and qualified rate of colonies were counted.n Results:A total of 280 water samples were collected.The number of colonies at the water outlet of the new DCU that used distilled water added with ICXn ? tablets as dental unit waterlines was lower than that of distilled water group from the first day, and the difference was statistically significant (n P=0.007) . The qualified rate of colony number at the water outlet of the new DCU that used distilled water added with ICXn ? tablets as dental unit waterlines was higher than that of distilled water group from the second day, and the difference was also statistically significant (n P=0.007) .n Conclusions:ICXn ? tablets can effectively control the pollution of dental unit waterlines and can keep the number of colonies in dental unit waterlines at a low level for a long time, but it still needs to be combined with regular monitoring and enhanced disinfection.n