Which practice is effective in reducing biofilm in dental unit water systems?

Using chemical treatments is effective in reducing biofilm in dental unit water systems because these treatments are designed to penetrate and disrupt the complex structure of the biofilm. Biofilms consist of layers of bacteria and other microorganisms that adhere to surfaces, making it difficult for physical methods alone, such as flushing or filtration, to adequately remove them. Chemical agents can help in breaking down the biofilm, killing the microorganisms, and preventing their regrowth, thus improving the overall microbiological quality of the water.

Regular maintenance practices, such as changing water filters and flushing water lines, may help reduce the accumulation of biofilm but may not be fully effective on their own. While flushing the water lines can help remove some debris and stagnant water, it doesn't necessarily eliminate established biofilms. Using bottled water exclusively can mitigate some risks, but it does not address the issue within the system itself. Therefore, chemical treatments offer a targeted approach specifically designed to combat biofilms in dental unit water systems.