Prevention of bacterial contamination of water in
1985-3-1 · Bacteriological tests From the cup-water filler-nozzle, the air-water three-way syringe and the air-turbine scraping-handpieces of the respective dental units, 5-30 ml each of water was collected with a sterilized syringe. At the same time, a sample of the tap-water (25 ml) upstream of the dental unit was collected and used as a control.
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