In which type of facility can a dental hygienist NOT perform treatment without the direct supervision of a dentist?

The correct answer is that a dental hygienist cannot perform treatment without the direct supervision of a dentist in a private practice setting. In a typical private practice, the dental hygienist operates under the guidance and oversight of a licensed dentist, who is responsible for the overall care and treatment the patient receives. This ensures accountability and quality of care, as the dentist retains responsibility for the patient's treatment plan and outcomes.

In contrast, public health clinics, dental schools, and community health centers often have established protocols that allow dental hygienists more flexibility in their practice. In these settings, depending on state laws and facility regulations, hygienists may work under indirect supervision or even independently to provide preventive services and education to patients. The varying degrees of supervision are structured to enhance access to dental care, particularly in underserved populations where the demand for oral hygiene services may exceed the availability of dentists.

This differentiation underscores the importance of understanding the scope of practice regulations that govern different environments, as they directly influence how dental hygienists can serve patients while adhering to legal and professional standards.