Which statement is NOT true about the direction required of a public health hygienist?

The reason the statement about the dentist signing off on the hygienist's evaluation is not true lies in the requirement for supervision and direct involvement of the dentist in the treatment process. In many jurisdictions, the practice of dental hygiene requires that a dentist directly supervise the activities of the hygienist rather than simply providing a signature after an evaluation.

Direct supervision typically entails that the dentist is present in the facility while the hygienist performs procedures, ensuring that patient care is adequately monitored and that the hygienist's work adheres to established standards of practice. This requirement is put in place to protect patient safety and ensure quality care because the responsibilities of a hygienist can have significant implications for a patient's dental health.

In contrast, other statements reflect typical practices in the field: public health hygienists do perform complete oral examinations, and they must operate under the specific guidelines established by dental practice acts, which often require active supervision rather than mere oversight. Completing patient assessments independently is also characteristic of a hygienist's role, but it must align with the scope of practice defined by the supervising dentist.