The following practices, acts, and operations are exempt from the operation of this chapter:

(1)  Physicians in the regular discharge of their duties.

(2)  The operation by bona fide students of dentistry or dental hygiene in the clinical departments or the laboratory of a school of dentistry or dental hygiene approved by the American Dental Association Commission on Dental Accreditation or its designated agency or by the board of examiners in dentistry.

(3)  The practice of dentistry by licensed dentists of other states or countries while appearing and operating as bona fide clinicians or instructors in a school of dentistry or dental hygiene approved by the American Dental Association Commission on Dental Accreditation or its designated agency and by the board of examiners in dentistry.

(4)  The practice of dentistry by licensed dentists of other states or countries in conducting or making a clinical demonstration before any bona fide dental or medical society, association, or convention; provided, that the consent of the board of examiners in dentistry to the making and conducting of the clinical demonstration must be first obtained.

(5)  The practice of dentistry or dental hygiene by students of a school of dentistry or dental hygiene approved by the American Dental Association Commission on Dental Accreditation or its designated agency and under the supervision of a licensed dentist, in any public hospital, or any institution under the supervision of the state or in any program of the state department of health, with the approval of the board of examiners in dentistry and the authorities of the school, as a part of the required training of the student.