Study on the effect of three disinfection methods on contamination control of dental unit waterlines
Objective To observe the effect of three different disinfection methods on sustained contamination control of dental unit waterlines(DUWL).Methods Site sampling and quantitative bacterial detection were used to observe the effect of three disinfection methods on sustained contamination control of DUWL.Results Using chlorine-containing disinfectant with 500 mg/L of available chlorine once a week or with 20 mg/L of available chlorine once a day,it could maintain a total bacterial count of less than 100 cfu/mL in water from triple syringes and high-speed handpieces for 24 consecutive weeks.Using iodinated resin with 6 mg/L of available iodine for continuous exposure,it could maintain a total bacterial count of less than 100 cfu/mL for 1 to 24 weeks in water from triple syringes and 4 to 24 weeks in water from high-speed handpieces.Conclusion All three disinfection methods can make the water quality of DUWL meet the drinking water standard,and iodinated resin has more superiority.
dental unit waterlinesdental treatment wateriodinated resinchlorine-containing disinfectantcontrol effect
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