Who is allowed to place retraction cord and obtain a final impression for crown and bridge procedures under direct supervision?

The correct answer is that a Registered Dental Assistant with Extended Functions (RDAEF) is permitted to place retraction cord and obtain a final impression for crown and bridge procedures under direct supervision.

In California, the role of an RDAEF distinguishes them from other dental assistants due to their additional training and certification. RDAEFs have expanded duties that include certain advanced procedures, which are not within the scope of practice for a standard Registered Dental Assistant (RDA) or an unlicensed dental assistant. The placement of retraction cord and the ability to take final impressions are specific procedures that require the additional training and oversight provided to an RDAEF. This ensures patient safety and compliance with regulatory standards pertaining to dental care.

Understanding the scope of practice for each category of dental assistant is crucial in ensuring that procedures are performed by qualified individuals, and this aligns with California's dental laws and regulations.