Need an advice, or do you have questions about Bacteria’s or water treatment?
Lutz Jatzwauk - a, Bernd Reitemeier - b
a - Department for Hospital Infection Control at the University Hospital of the Dresden University of Technology,
b - Department for Prosthetic Dentistry at the University Hospital of the Dresden University of Technology, Dresden,
Article about the use of a inline electrochemical disinfecting system.
The system used in this article was not a BacTerminator® Dental System. But a system using a similar technology.
Three different methods for minimizing the bacterial contamination of the water system in a
SIRONA C2type dental unit were investigated sequentially. Without any decontamination
method, water from the hand piece, air-water-jet and mouthwash were continuously
contaminated by 103 to 105 colony forming units (cfu) of aerobic mesophilic bacteria per
A reduction to below 100 cfu/ml was achieved by continuous adding of a chemical
microbicide based on hydrogen peroxide and silver ions. However, this was only possible
after rinsing the system thoroughly for at least two minutes after interruptions of the
treatment. Long-lasting low counts of below 100/ml were obtained by means of an in-line
bacteria filter, in connection with the provision of a thermo-chemical or thermal
decontamination of the water pipes and hand pieces after the filter.
The electrolyte release of chlorine from the dental unit tap water by anodic oxidation
without addition of any chemical disinfectant also resulted in continuously low colony
numbers of the water. In this case, regular decontamination of the end parts of the pipes and
hand pieces was not necessary.
Full article can be read in:Int. J. Hyg. Environ. Health 204, 303 ± 308 (2002)
Urban & Fischer Verlag