Under general supervision, who can polish coronal surfaces of teeth?

The correct choice indicates that a Registered Dental Assistant (RDA) is permitted to polish the coronal surfaces of teeth under general supervision. This is significant as it delineates specific responsibilities associated with different classifications of dental assistants in California.

The role of an RDA is defined in the California Dental Practice Act, where it is acknowledged that they have completed a state-approved program and passed a relevant examination. This level of training qualifies them to perform certain tasks, including polishing the coronal surfaces of teeth, while operating under the general supervision of a licensed dentist. General supervision means that the dentist does not need to be present in the treatment facility when the RDA performs these tasks, although they must be available for consultation.

In terms of the broader context of dental professionals, while many can perform a variety of tasks, not all may be sanctioned to perform specific procedures like polishing without the requisite qualifications. This creates a structure that ensures patient safety and maintains high standards of care within the dental practice.

Given this context, the inclusion of the RDA as the correct answer highlights the importance of clarity in the scope of practice for dental professionals, ensuring that only those who are appropriately trained and certified carry out specific dental procedures.