In direct supervision during a dental procedure, what must the supervising dentist do?

In direct supervision during a dental procedure, the supervising dentist is required to authorize the procedure to be performed. This means that the dentist must evaluate the patient's condition, determine the appropriateness of the procedure, and provide consent for the procedure to proceed. This level of supervision ensures that the dental hygienist or dental assistant has the necessary approval and oversight while performing their duties.

The other options present situations that do not align with the requirements of direct supervision. For instance, leaving the dental office would not meet the criteria for direct supervision, as the supervising dentist must be physically present to provide guidance and oversight. Similarly, while providing assistance during the procedure could be beneficial, it is not a mandatory requirement under the definition of direct supervision. The key component is the authorization aspect, making it crucial for maintaining the standards of patient care and safety in a dental practice.