California Registered Dental Assistant (RDA) Written Practice Exam

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Which of the following greatly reduces or eliminates biofilm in the dental unit water system?

  1. Regular water flushing

  2. Using distilled water only

  3. Properly using chemical treatments

  4. Air drying

The correct answer is: Properly using chemical treatments

Regular water flushing may help reduce biofilm in the dental unit water system, but it is not a guaranteed method and may not completely eliminate it. Additionally, using distilled water only may be effective in reducing biofilm, but it can be expensive and impractical for daily use. Air drying may not have any significant impact on biofilm. Properly using chemical treatments, on the other hand, has been proven to greatly reduce or eliminate biofilm in the dental unit water system. These treatments are specifically designed to target and eliminate biofilm, making it the most effective option.

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