The prohibitions of this chapter do not apply to:
(1) a person interning under the supervision of a denturist;
(2) the practice of dentistry or medicine by persons authorized to do so by this state;
(3) a student of denture technology in pursuit of clinical studies under an approved school program;
(4) a denture technician, as defined by board rule, performing services under the direction of a licensed denturist or licensed dentist when the service does not involve contact with the intended user.