D.C. Mun. Regs. tit. 17, § 9005
9005
9005.1 Subject to the restrictions set forth in this Section 9005, a dentist may delegate to a dental assistant only those procedures which are:
(a) Appropriate to the training and experience of the dental assistant and the practice of the supervising dentist;
(b) Reversible; and
(c) To be performed under the direct supervision of the dentist.
9005.2 Except as provided in Subsection 9005.3 of this chapter, a dental assistant shall not place or expose dental x-ray film unless he or she has:
(a) Satisfactorily completed a radiation course or examination recognized by the American Dental Association Continuing Education Recognition Program (CERP);
(b) Been certified by the American Registry of Radiologic Technologists;
(c) Satisfactorily completed a radiation course and passed an examination given by the Dental Assisting National Board; or
(d) Been grandfathered in pursuant to the following section.
9005.3 A dentist may permit an assistant who does not meet the requirements of Subsection 9005.2 to place or expose dental x-ray film if:
(a) The assistant has completed in-office training;
(b) The assistant has demonstrated competency to perform the task to the supervising dentist's satisfaction; and
(c) The assistant registers no later than September 17, 2012.
9005.4 Except as provided in Subsection 9005.5 of this chapter, the following dental procedures shall only be delegated to a dental assistant who:
(a) Has satisfactorily completed a training program approved by CERP-approved program, a training program or course recognized by the American Dental Association Commission on Dental Accreditation (CODA); and
(b) Performs the tasks under direct supervision with the supervising dentist checking and approving the completed task prior to dismissal of the patient from the office:
(1) Placement of retraction cord;
(2) Placement or removal of matrices;
(3) The application of a medicinal agent to a tooth for a prophylactic purpose;
(4) Placement of periodontal dressings;
(5) Removal of temporary restorations without the use of a rotary instrument;
(6) Removal of sutures; and
(7) Whitening.
9005.5 A dentist may delegate performance of a task set forth in Subsection 9005.4 of this chapter to a dental assistant who does not meet the training requirements in Subsection 9005.4(1), if:
(a) The assistant had been performing the task on the effective date of these regulations;
(b) The assistant has demonstrated competency to perform the task to the supervising dentist's satisfaction; and
(c) The assistant registers no later than September 17, 2012
9005.6 A dentist shall not delegate to a dental assistant any of the following procedures:
(a) Those procedures excluded by 17 DCMR § 4215.1;
(b) A preliminary dental examination;
(c) A complete prophylaxis, including the removal of any deposits, diseased crevicular tissue, accretion, or stain from the surface of a tooth or a restoration;
(d) The intraoral polishing of a tooth or a restoration;
(e) The charting of cavities during preliminary examination, prophylaxis, or polishing, however a dentist may permit an assistant to record the charting of cavities as dictated by the dentist or dental hygienist during the course of a preliminary examination or dental procedure;
(f) The instruction of individuals or groups of individuals in oral health care, unless it is in the dental office and done as instructed by the dentist;
(g) The application of pit and fissure sealants;
(h) Diagnostic screening to identify indications of oral abnormalities;
(i) Administration of local anesthesia with board identified criteria and certification;
(j) Administration of nitrous oxide with board identified criteria and certification;
(k) Placement of temporary restorations; or
(l) Taking final impressions.
SOURCE: Notice of Final Rulemaking published at 58 DCR 852, 5853 (July 15, 2011); as amended by Final Rulemaking published at 60 DCR 2401 (March 1, 2013).