Registered Dental Assistant (RDA) Law and Ethics Practice Exam

What type of disinfectant should be used for non-critical dental instruments?

1. A low-level disinfectant unless visibly contaminated

2. Any disinfectant available

3. Only high-level disinfectant

4. Non-critical instruments do not need disinfection

The correct answer is: A low-level disinfectant unless visibly contaminated

Using a low-level disinfectant for non-critical dental instruments is appropriate because these types of instruments do not typically come into contact with blood, saliva, or other potentially infectious materials. Non-critical instruments, such as dental bib holders, light handles, and some types of handpieces, primarily contact intact skin. A low-level disinfectant is effective in reducing the number of microorganisms to a safe level for these surfaces, provided they are not visibly contaminated. If non-critical items are visibly soiled, they should be cleaned with soap and water before applying a disinfectant to ensure effectiveness. This method aligns with infection control guidelines that specify the appropriate type of disinfectant based on the level of risk associated with the instrument. In contrast, other choices imply the use of inappropriate practices. Using any available disinfectant does not guarantee effectiveness, while employing high-level disinfectants is unnecessary for non-critical instruments and may lead to unnecessary costs and resource use. Lastly, stating that non-critical instruments do not need disinfection undermines the importance of maintaining hygiene standards.