Which of the following statements is true regarding the requirements for dental assistants?

The statement about the necessity for dental assistants to have a written agreement with a licensed dentist is correct because it reflects the regulatory framework established for dental assistants. In many jurisdictions, including Iowa, dental assistants are required to work under the supervision of a licensed dentist. This written agreement helps clarify their roles, responsibilities, and the scope of practice under which they operate. It ensures that the dental assistant is appropriately aligned with the dental practice's policies and the supervising dentist's directives, which is essential for maintaining patient safety and adhering to legal standards in the dental field.

In contrast, working independently without supervision, not requiring any exams for registration, or having the authority to supervise dental procedures are not aligned with the standard practices and regulations. Dental assistants typically need to operate under the guidance of a dentist and are not permitted to make clinical decisions independently or supervise procedures without appropriate oversight.