Missouri Revised Statutes Title XXII. Occupations and Professions § 332.364. Removable dentures to be marked for identification, how marked--prior existing unmarked dentures to be marked, when

1. On and after January 1, 1988, every complete upper and lower denture and removable dental prosthesis fabricated by a dentist, or fabricated pursuant to his or her prescription, shall be marked with the name or Social Security number, or both, of the patient for whom the prosthesis is intended.  The markings shall be made during fabrication and shall be permanent, legible and cosmetically acceptable.  The exact location of the markings and the methods used to apply or implant them shall be determined by the dentist or dental laboratory fabricating the prosthesis.  If, in the professional judgment of the dentist, this full identification is not possible, the name or Social Security number may be omitted.

2. Any removable dental prosthesis in existence which was not marked in accordance with subsection 1 of this section at the time of fabrication shall be so marked at the time of any subsequent rebasing or duplication.