Which task can a dental hygienist perform when provided with direct supervision by a dentist?

A dental hygienist can place and remove orthodontic appliances under direct supervision by a dentist. This means that while the hygienist can perform these tasks, they must do so while the dentist is present and overseeing the procedure. This kind of task falls within the scope of practice for dental hygienists who have received proper training and certification in orthodontics.

In contrast, the ability to administer local anesthetics typically requires more extensive training and may not fall under the hygienist's scope of practice, depending on state regulations. Taking dental radiographs often does not require direct supervision as hygienists are generally permitted to perform this task independently after appropriate training. The removal of dental implants is usually performed by a dentist or oral surgeon due to the complexities and potential complications involved, making it beyond the typical scope of practice for a dental hygienist.