Disinfection effect of slightly acidic electrolyzed water on Dental unit water lines
Ning Huang, Bing Han, Jin Shen, Jing Su
Published 2016-08-26
Cite as Chin J Mod Nurs, 2016, 22(24): 3534-3537. DOI: 10.3760/cma.j.issn.1674-2907.2016.24.035
Abstract
ObjectiveTo explore the disinfection effect of slightly acidic electrolyzed water on dental unit water lines (DUWLs).
MethodsFirst, a total of 5 dental chair units (DCUs) with self-contained water supply were selected and were placed with freshly slightly acidic electrolyzed water (SAEW) every night. And then, we collected water samples from dental handpieces and water outlet of the gun for three purposes at 8 am and 12 am of the next day to count bacterial colony. This research included four stages involving that the content of effective chlorine of SAEW was about 40 mg/L with 20 days for continuous disinfection, the content of effective chlorine was about 20 mg/L with 10 days for continuous disinfection and 7 days for stopped disinfection, the content of effective chlorine was about 10 mg/L with 15 days for continuous disinfection.
ResultsThe average pass rates of water samples were 99.25%, 98.00%, 98.33% with SAEW of three different concentrations for the disinfection of DUWLs. The pass rate of water quality was changed from initial 100% to 0 without disinfection for water lines for 7 days.
ConclusionsThere is microbial contamination in DUWLs. The disinfection effect is remarkable with SAEW for DUWLs, and there is no significant difference among DUWLs of different concentrations. Therefore, SAEW with low concentration of effective chlorine can be applied in clinic for continuous disinfection of DUWLs with self-contained water supply by taking all factors (disinfection effect, safety of dental treatment instruments, degree of comfort of patients and so on) into account.
Key words:
Disinfection; Slightly acidic electrolyzed water; Dental chair unit; Dental water lines
Contributor Information
Ning Huang
Department of Disease Control, Beijing Stomatological Hospital, Capital Medical University, Beijing 100050, China
Bing Han
Medical Service Section, Beijing Stomatological Hospital, Capital Medical University, Beijing 100050, China
Jin Shen
Environment Institute, Chinese Center for Disease Control and Prevention, Beijing 102206, China
Jing Su
Department of Disease Control, Beijing Stomatological Hospital, Capital Medical University, Beijing 100050, China