Md. Code, Health Occupations § 4–402

(a) Except as otherwise provided in this subtitle, a person other than a licensed dentist may not do dental laboratory work unless the person:

(1) Works under a work authorization that meets the requirements of § 4-403 of this subtitle; and

(2) Uses casts or models made from impressions taken by a licensed dentist.

(b) The requirements of this subtitle that relate to work authorizations do not apply to:

(1) A dental laboratory on the premises of a dental office that is used only by the licensed dentists practicing in the office; or

(2) A dental student, dental technician, or student dental technician while doing dental laboratory work at the educational institution, hospital, or clinic with which the individual is associated.