Procedures prohibited from delegation to dental hygienists.

The following functions and procedures must not be delegated to dental hygienists: (1) dental examinations, dental diagnoses, and dental treatment planning; (2) cutting or performing surgical procedures on hard and soft tissues; (3) performing restorative, prosthetic, and orthodontic procedures and other procedures that require professional education and skill of the dentist; (4) performing any intra-oral procedure that would affect the function or efficiency of an appliance which, when worn by the patient, would come in direct contact with hard or soft tissue; (5) placing and carving permanent type restorations in or on teeth; (6) making impressions and jaw relation records, other than study casts and opposing casts, that will be issued for construction of dental appliances, other than bleaching trays; (7) making any and all corrections of malformation of teeth or the jaws; (8) making decisions concerning drugs and their dosages and writing prescriptions or work authorizations, except pursuant to standing orders; (9) administering general anesthesia or nitrous oxide analgesia; (10) administering local anesthesia other than under direct supervision.