Monitoring of pollution conditions of the new dental unit waterlines
10.3760/cma.j.cn115682-20191126-04310
- VernacularTitle:全新口腔综合治疗台水路污染情况监测
- Author:
Chunli WANG
1
;
Yuting NIU
;
Qian LU
;
Meng HAN
;
Yingying LI
;
Xiue LI
Author Information
1. 北京大学口腔医院护理部，北京 100081
- Keywords:
Microbial contamination;
Colony;
Dental chair unit
- From:
Chinese Journal of Modern Nursing
2020;26(10):1320-1324
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To study changes of pollution conditions of the new dental unit waterlines.Methods:By means of random sampling, 7 new dental chair units of the same brand were selected. Of which, 5 dental chair units (DCU) were supplied with water after centralized treatment of municipal water and 2 dental chair units were supplied with independent water storage tanks. From the first day of clinical use, water samples of three-way syringes and high-speed dental handpieces and mouthwashes were continuously collected for bacterial culture and the number of colonies was counted.Results:A total of 343 water samples were collected. There was a statistically significant difference in the number of colonies in the water samples from the outlet of three-way syringes and high-speed dental handpieces after the waterlines was rinsed for 2 min before treatment ( P<0.01) . There was no statistically significant difference in the number of dental unit warterlines (DUWLs) colonies between the central water supply and the independent water storage tank before and after washing ( P> 0.05) . Waterline washing could significantly reduce the number of colonies in the waterlines ( P<0.01) , but there was no significant change in the number of colonies throughout the day ( P>0.05) . The number of colonies in the new DUWLs could exceed the recommended standard in the guideline on the second day of clinical use and the number of colonies increased significantly compared with that on the first day ( P<0.05) . Conclusions:In clinical work, no matter what kind of water supply method is used, in addition to waterline washing according to regulations, DUWLs should be disinfected daily.
