True or False: The presence of biofilms of waterborne bacteria in dental unit waterlines has been confirmed.

The statement is true because research has demonstrated that biofilms composed of waterborne bacteria do indeed develop in dental unit waterlines. These biofilms form when bacteria adhere to the surfaces within the waterlines and create a slimy layer. This biofilm can protect the bacteria from disinfection processes, allowing them to persist and even proliferate over time within the water system of dental units. The presence of such biofilms poses a risk of introducing harmful pathogens into the oral cavity during dental procedures, which highlights the importance of regular maintenance and disinfection protocols for dental unit waterlines. This understanding reinforces the necessity for dental professionals to be aware of biofilm-related infection control measures in order to safeguard patient health.