Which of the following can an RDA do under General Supervision?

An RDA (Registered Dental Assistant) operates under the provision of General Supervision, which allows certain procedures to be performed without the immediate presence of a licensed dentist. Among the given options, placing and removing temporary sedative dressings is an appropriate task that falls within the scope of an RDA under General Supervision.

This procedure is considered a supportive role in dental treatment, as it can be performed safely by an RDA under the predetermined guidance established by the supervising dentist. Temporary sedative dressings are often used to relieve dental pain or protect the pulp of a tooth prior to further treatment, making it a common scenario for RDAs to handle.

In contrast, performing full dental evaluations, diagnosing dental diseases, and removing permanent restorations require a higher level of expertise and direct supervision from a dentist, as these tasks involve significant clinical judgment, the potential for diagnosis, and the application of complex treatment protocols. Therefore, option C stands out as the correct action that can be executed by an RDA under General Supervision.