California Registered Dental Assistant (RDA) Written Practice Exam

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For managing contamination of digital radiographic sensors that cannot be heat sterilized, it is recommended to

  1. only clean the sensors

  2. use impervious barriers followed by cleaning and disinfection

  3. immerse in high-level disinfectant

  4. avoid using them if possible

The correct answer is: use impervious barriers followed by cleaning and disinfection

Digital radiographic sensors cannot be heat sterilized, meaning that they cannot be disinfected by heat in an autoclave. Only cleaning the sensors (choice A) is not sufficient to eliminate contamination. While immersing in high-level disinfectant (choice C) may effectively eliminate contamination, it is not recommended as it may damage the sensors. Avoiding using the sensors altogether (choice D) is not a feasible solution, especially in a clinical setting where they are necessary for patient care. Therefore, it is recommended to use impervious barriers to protect the sensors followed by cleaning and disinfection (choice B) to ensure effective and safe management of contamination.

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