1. All appeals filed by the plaintiffs are dismissed.

2. The costs of appeal are assessed against the Plaintiffs.

The purport of the claim and appeal is the purport of the appeal.

1. The reasons for the admitting the judgment of the first instance court concerning this case are as follows: Article 7-12 of the judgment of the first instance court; Article 2-1 of the Regulations on Dental Practice, Recognition of Qualifications, etc. of Dental Specialists (amended by Presidential Decree No. 29749 of May 7, 2019); Article 7-14 of the Enforcement Rule of Dental Qualification Examination; Article 24-21 of the Enforcement Rule of Dental Qualification Examination (amended by Presidential Decree No. 297 of Sep. 27, 2019); Article 3-1 of the former Dental Qualification Examination Act (amended by Presidential Decree No. 2972 of Sep. 27, 2019); Article 2-1 of the Enforcement Rule of Dental Qualification Examination Act (amended by Ordinance No. 1560 of Sep. 27, 2019); Article 3-2 of the 8-1 of the 19-2 of the 19-2 of the 19-2 of the 15-2 of the 1-2 of the 1-2 of the 1-2 of the 3-2 of the 7-1.