Which of the following is NOT a duty a dental assistant can perform?

The ability of a dental assistant to perform specific duties is governed by regulations that outline the scope of practice for dental professionals. Administering nitrous oxide typically requires specific training and certification due to the potential risks and complexities involved with its use. This is a task that generally falls within the scope of practice for licensed dental hygienists or dentists rather than dental assistants.

In contrast, assisting during cleanup, conducting patient education, and preparing examination rooms are all duties that dental assistants are trained to perform, as these tasks do not require specialized training beyond their scope. They focus on supporting the dental team in daily operations and enhancing patient experiences while maintaining a safe and organized environment. Thus, the correct answer emphasizes the limitations on the duties of a dental assistant, particularly for procedures that pose medical risks.