In which of the following settings may a hygienist NOT perform her duties?

A dental hygienist is skilled in providing preventive oral care and performing specific procedures within a variety of settings. However, their ability to perform duties can be limited based on the regulations set forth by state laws and facility protocols.

In the context of the options provided, performing duties in a patient's home presents significant challenges. Home care may not fall under the conventional settings where dental hygiene services are typically offered. Regulations may require certain facilities or clinical environments to ensure infection control, access to immediate assistance in case of emergencies, and the availability of dental equipment and supplies that are organized in a way that a home setting often lacks.

On the other hand, a dental office, a hospital setting, and a dental school clinic are all structured environments that are specifically designed to accommodate the practice of dental hygiene. These facilities have the proper infrastructure, support staff, and compliance with health regulations, which assure that services can be provided effectively and safely.

Thus, while dental hygienists can offer care in a variety of locations, the home of an ambulatory patient does not typically meet the necessary formal requirements to perform their duties safely and effectively, making it the most restrictive option.