Under general supervision, which task is NOT allowed for a dental assistant?

Under general supervision, dental assistants have a defined scope of practice that dictates which tasks they can perform without the direct supervision of a licensed dentist. General supervision allows the dental assistant to perform certain procedures as long as they are in accordance with the guidelines set forth by the California Dental Board.

Examining orthodontic appliances requires clinical judgment and assessment of the patient's needs, which falls outside the permissible tasks for a dental assistant under general supervision. This particular task typically requires the expertise of a licensed orthodontist or dentist who can make diagnostic decisions based on clinical findings.

On the other hand, the other tasks listed—exposing dental radiographs, exposing intraoral photos, and performing intraoral retraction and suctioning—are within the allowed scope of practice for dental assistants under general supervision. These activities are more technical and procedural in nature, focusing on supporting the treatment process rather than diagnosing or evaluating orthodontic conditions.

Thus, the answer correctly identifies that examining orthodontic appliances is not an allowed task under general supervision for a dental assistant, as it requires clinical judgment not designated to them in California law.