Ozone is the most effective disinfectant for dental treatment units: Results after 8 years of comparison

The method of disinfecting water in dental treatment units using ozone‐containing water was first described 10 years ago. In an investigational period over the last 8 years, waters from the outlets of 14 treatment units were examined microbiologically in a total of 240 tests. Twelve of the treatment units, employing hydrogen peroxide/silver ion disinfection ‐ after repeated sanitization ‐ regularly exceeded the limits laid down in the regulations governing water purity, and Pseudomonas aeruginosa could be detected at 181 water outlets. However, germs could hardly be detected in any of the tests of waters sampled from the two treatment units using ozonated water disinfection.