(1) A licensed dentist or dental hygienist serving in any branch of the United States Armed Services, Veterans' Administration or Public Health Service from discharging the dentist's or dental hygienist's official duties;

(2) A licensed physician or surgeon from extracting teeth or treating pathological conditions of the mouth, teeth or oral tissues, or from radiographing such tissues, unless such person practices dentistry as a specialty;

(3) A lawful practitioner of dentistry in another state, the District of Columbia or a territory of the United States from making a clinical demonstration for educational purposes before a dental society, convention, association of dentists or dental college or performing duties in connection with a specific case on which the practitioner may have been called to this State by a legally qualified practitioner of dentistry of this State.

(4) A practitioner of dentistry who maintains a lawful dental license to practice in another state, the District of Columbia or a territory of the United States from making a clinical demonstration in connection with the lawful research and development of dental product or dental products manufactured by a dental manufacturer complying with guidelines set forth by the United States Food and Drug Administration.

(5) A person not currently licensed as a dentist under this chapter from owning or operating a nonprofit, tax-exempt organization as described in §§ 501(c)(3), 509(a)(1) and 170(b)(1)(A)(iii) of the Internal Revenue Code (26 U.S.C. §§ 501(c)(3), 509(a)(1), and 170(b)(1)(A)(iii)) so long as such person is not otherwise practicing dentistry.