What is a requirement for dental personnel under direct supervision?

The requirement for dental personnel under direct supervision is that assigned personnel must have passed a relevant exam. This ensures that individuals performing specific tasks have the necessary knowledge and skills to provide safe and effective care. Direct supervision entails that a licensed dentist is present in the office and is responsible for overseeing the procedures performed by dental assistants or hygienists. Therefore, having passed a relevant exam signifies that these personnel have been adequately trained and qualified to operate under the dentist's supervision, ensuring patient safety and adherence to professional standards.

In this context, the presence of the dentist during procedures is crucial, highlighting why other options do not align with the requirements for direct supervision. For instance, leaving the office during a procedure implies a lack of oversight, which violates the premise of direct supervision. Evaluating the performance of personnel is typically not solely the responsibility of the patient, as routine assessments are usually conducted by the supervising dentist or other trained staff. Moreover, while training is vital, the assertion that there are no training requirements contradicts the necessary standards set for dental professionals in practice.