332.151.  Dentist applicant, examination, how conducted — failure, reexamination, additional education, when. — 1.  Each applicant for dental examination and registration, after the board has determined that he is a person of good moral character and reputation, shall appear before the board at the time and place in or out of the state of Missouri specified by the board in a written notice to each applicant.  The fee accompanying the application as provided in section 332.141 shall not be refunded to any applicant who fails to appear at the time and place so specified, but the board for good cause shown, as defined by rule, may permit any applicant to take the examination or examinations at a later time without paying an additional fee.

  2.  The board shall determine and specify by rule whether the dental examinations shall be written or oral or clinical or all three, but in any event they shall be in such form and of such content and character as to thoroughly test the qualifications of the applicant to practice dentistry in Missouri.  Completion of the national board theoretical examination with scores acceptable to the board, as promulgated by rule, ^* is a prerequisite to taking the dental examinations.

  3.  Any applicant who passes the dental examination or examinations with the average grade specified by a rule promulgated by the board shall be entitled to registration as a dentist in Missouri and shall receive a certificate of registration; but even though an applicant may have made passing grades on his examinations, he shall not be entitled to a certificate of registration as a dentist if the board finds that at any time prior to the issuance of the certificate he has cheated or attempted to cheat on his examination or examinations or any of them or has made false or misleading statements in any application filed for the examination with intent to deceive the board, or that he is not a person of good moral character.

  4.  The board shall determine and specify by rule the number of times an applicant may fail all or a portion of the dental examinations without completing additional education in an accredited dental school, and shall specify by rule the type and amount of additional education which shall be required of an applicant, which type and amount may vary depending upon the failed portions of the dental examinations.  However, no applicant shall be refused permission to take the dental examinations twice without completing additional education, nor shall additional education be required if the applicant only fails an examination over Missouri laws.