Who can take impressions for cast restorations?

Taking impressions for cast restorations is a specific procedure regulated under California dental law. The correct answer indicates that a Registered Dental Assistant with Extended Functions (RDAEF) is trained and legally permitted to perform this task. This role requires additional education and training beyond what a standard Registered Dental Assistant or a Dental Assistant receives, enabling them to carry out more complex procedures, including taking impressions specifically for cast restorations.

The RDAEF must complete a state-approved program that provides knowledge and practical skills in various advanced dental procedures. Their qualifications ensure they understand not just the technique of taking impressions but also the relevant clinical implications, including material handling and the potential impact on patient care. Therefore, the designation of "Extended Functions" is key in this context because it reflects the expanded scope of practice allowed by California law.

In contrast, while a Registered Dental Assistant and a Dental Assistant may assist in various settings and procedures, they do not possess the specific training or legal authorization to take impressions for cast restorations without the Extended Functions designation. Consequently, the other options do not meet the legal requirements necessary to perform this particular task.