Final answer:
The correct answer is option a. at least once per day.
Step-by-step explanation:
The dental water lines should be flushed regularly to maintain cleanliness and prevent the growth of bacteria. Ideally, dental water lines should be flushed at least once per day or in between each patient to ensure a safe and hygienic environment. Regular flushing helps to remove any residual debris or biofilm that may accumulate in the water lines.
Flushing the dental water lines can be done using appropriate disinfectants or flushing agents recommended by the manufacturer. It is important to follow the manufacturer's instructions and guidelines for flushing and maintenance of dental water lines.
By flushing the dental water lines regularly, it helps to minimize the risk of contamination and ensures the delivery of clean and safe water to patients during dental procedures.