(a) A registered dental assistant in extended functions is authorized to perform the additional duties as set forth in subdivision (b) pursuant to the order, control, and full professional responsibility of a supervising dentist, if the licensee meets one of the following requirements:

1. (1) Is licensed on or after January 1, 2010.
2. (2) Is licensed before January 1, 2010, and has successfully completed a board-approved course in the additional procedures specified in Section 1753.5.

(b)

1. (1) 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. In these circumstances, the dental assistant in extended functions shall follow protocols established by the supervising dentist. This paragraph only applies in the following settings:

   1. (A) In a dental office setting.
   2. (B) 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.

2. (2) Place protective restorations, which for this purpose are identified as interim therapeutic restorations, and defined as a direct provisional restoration placed to stabilize the tooth until a licensed dentist diagnoses the need for further definitive treatment. An interim therapeutic restoration consists of the removal of soft material from the tooth using only hand instrumentation, without the use of rotary instrumentation, and subsequent placement of an adhesive restorative material. Local anesthesia shall not be necessary for interim therapeutic restoration placement. Interim therapeutic restorations shall be placed only in accordance with both of the following:

   1. (A) In either of the following settings:

      1. (i) In a dental office setting, under the direct or general supervision of a dentist as determined by the dentist.
      2. (ii) 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.
   2. (B) After the diagnosis, treatment plan, and instruction to perform the procedure provided by a dentist.