Which activity is NOT permitted for a Dental Hygienist?

A dental hygienist's practice is governed by specific regulations that outline the activities they are trained and permitted to perform. Among the options provided, undertaking endodontic treatment is beyond the scope of a dental hygienist's practice.

Endodontic treatment, which involves procedures such as root canals, requires advanced training and is typically performed by a dentist. Dental hygienists are trained primarily in preventive care and basic treatments, focusing on maintaining oral health, hygiene, and patient education. Their duties do include providing oral health education, performing dental cleanings, and in some scenarios, trying in dentures set in wax as part of the prosthodontic process.

Thus, since endodontic treatment is specifically reserved for licensed dentists due to the complexity and the unique skill set required, it is the activity that is not permitted for a dental hygienist, emphasizing the clear boundaries within dental practice roles.