Journal of Applied Microbiology, Vol.107, No.4, 1081-1088, 2009
Control of microbial contamination in dental unit water systems using tetra-sodium EDTA
Aim: To examine the efficacy of tetra-sodium EDTA in controlling microbial contamination of dental unit water systems (DUWS). Methods and Results: Ten dental units were treated once a week with either 4% or 8% tetra-sodium EDTA for four or two consecutive weeks, respectively. Before treatment, 43% and 60% of the water samples from the air/water triple syringe and high-speed hand-pieces, respectively, exceeded the American Dental Association (ADA) guidelines of 200 CFU ml