National Dental Assisting Examining Board (NDAEB) Practice Exam

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Prepare for the National Dental Assisting Exam with comprehensive quiz questions, including multiple choice and detailed explanations. Equip yourself for success!

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How long does the CDC recommend purging dental unit water lines between patients?

10-20 seconds
20-30 seconds
30-45 seconds
1 minute

The correct answer is: 20-30 seconds

The Centers for Disease Control and Prevention (CDC) recommends purging dental unit water lines between patients for 20-30 seconds to reduce the risk of contamination. This practice is essential in maintaining the quality of water used during dental procedures, as it helps to clear any biofilm or microbial growth that may have accumulated in the lines. By running water through the lines for the recommended duration, dental professionals can ensure that the water being used is as free from pathogens as possible, thereby enhancing patient safety and infection control. The 20-30 second timeframe strikes a balance, allowing sufficient time for the water to flush out existing fluid while avoiding excessive water waste. This recommendation is part of broader infection control protocols aimed at safeguarding both patients and dental staff during clinical procedures, where exposure to potential pathogens is a concern.