(1) A physician licensed pursuant to Chapter 4731. of the Revised Code, to practice medicine and surgery or osteopathic medicine and surgery in Ohio, unless he practices dentistry as a specialty. For purposes of this rule, "Practicing dentistry as a specialty" means that the physician regularly and/or routinely provides treatment in which the procedure or procedures performed are primarily involving teeth, rather than treatment secondary to a medical emergency or medical procedure. It is not required that the practice of dentistry as defined herein be a specific majority percentage of time, but rather that a pattern of practicing dentistry as a specialty is demonstrated by the physician.
(2) A dentist of the United States armed forces, public health service, or veterans administration.
(3) A dentist licensed in another state, making a clinical demonstration before a dental society, convention, association of dentists, or dental college.