(a) Unless otherwise specified in this section, a registered dental assistant in extended functions licensed on or after January 1, 2010, who successfully completes a board-approved course in interim therapeutic restoration and radiographic decisionmaking, is authorized to perform the following enhanced duties pursuant to the order, control, and full professional responsibility of the supervising licensed dentist:

1. (1) Under general supervision, determine which radiographs to perform on a patient who has not received an initial examination by the supervising dentist for the specific purpose of the dentist making a diagnosis and treatment plan for the patient. The registered dental assistant in extended functions shall follow protocols established by the supervising dentist.
2. (2) Under direct supervision, place interim therapeutic restorations to stabilize the tooth until a licensed dentist diagnoses the need for further definitive treatment.

(b) Place interim therapeutic restorations after the supervising dentist confirms a diagnosis and provides instruction to perform the procedure in the following settings:

1. (1) In a dental office setting, under the direct or general supervision of a dentist.
2. (2) In public health settings, using telehealth, as defined by Section 2290.5, for the purpose of communication with the supervising dentist, including, but not limited to, schools, Head Start and preschool programs, and community clinics, under the general supervision of a dentist.