Any dental prosthetic or orthodontic model, impression, or appliance in the possession of any person other than a dentist, a student at an accredited dental school, or recipient patient without a written work authorization and corresponding number or identification on the model, impression, or appliance must be impounded by the board and is prima facie evidence of violation of this chapter.

Nothing in this section precludes a certified or qualified dental assistant or licensed dental hygienist from taking impressions for dental study casts under the direct supervision of a licensed dentist present on the premises.