Ohio Revised Code Title XLVII. Occupations Professions § 4715.20

(A) A licensed dentist;

(B) One who has obtained a license from the state dental board to practice as a dental hygienist;

(C) One who holds in good standing a license from another state to practice as a dental hygienist and is practicing as a volunteer without remuneration during a charitable event that lasts not more than seven days.

In the case of a person described in division (C) of this section, the person shall be deemed to hold, for the course of the charitable event, a license to practice as a dental hygienist from the state dental board and shall be subject to the provisions of this chapter authorizing the board to take disciplinary action against a license holder. Not less than seven calendar days before the first day of the charitable event, the person or the event's organizer shall notify the board of the person's intent to engage in the practice of dental hygiene at the event. During the course of the charitable event, the person's scope of practice is limited to the procedures that a dental hygienist licensed under this chapter is authorized to perform unless the person's scope of practice in the other state is more restrictive than in this state. If the latter is the case, the person's scope of practice is limited to the procedures that a dental hygienist in the other state may perform.