Registered Dental Assistant (RDA) Law and Ethics Practice Exam

Which types of instruments must be sterilized before use?

1. Critical and semi-critical instruments

2. Only critical instruments

3. Only disposable instruments

4. All instruments can be used without sterilization

The correct answer is: Critical and semi-critical instruments

The correct choice involves recognizing the importance of sterilization protocols in preventing the transmission of infectious diseases in dental practices. Critical instruments, which are those that penetrate soft tissue or bone, must be sterilized to eliminate the risk of transmitting pathogens. Semi-critical instruments, which come in contact with mucous membranes or non-intact skin, also require sterilization or high-level disinfection due to their potential to transmit infections if not properly cleaned and sterilized. Disposable instruments do not require sterilization since they are designed for single use and are discarded after a single patient encounter, thus minimizing any risk of cross-contamination. The idea that all instruments can be used without sterilization is contrary to established infection control guidelines and practices, which emphasize the necessary sterilization of any instruments that come into direct contact with patients to ensure safety and compliance with health regulations.