Texas Occupations Code - OCC § 266.002. Exemptions

(1) a student enrolled in a program of a school of dentistry;

(2) a licensed dentist engaged in the practice of dentistry in this state who performs a dental laboratory service for compensation or an employee of the dentist or of the professional corporation or partnership in which the dentist is an officer, partner, or employee if the service is performed:

(3) a manufacturer of materials or component parts, used in the fabrication of a dental prosthetic appliance and for sale or use by a dental laboratory, that are not directly fitted to a dental model or cast of the human teeth, gums, jaws, or alveolar process.