No person shall practice as a dental hygienist in this state until such person has passed a written and a clinical examination conducted by the Georgia Board of Dentistry. The fee for such examination shall be paid to the division director and shall be in an amount established by the board. The board shall issue licenses and license certificates as dental hygienists to those persons who have passed the examination in a manner satisfactory to the board, which license certificate shall be posted and displayed in the place in which the hygienist is employed.