Dental laboratories manufacture or customize a variety of products to assist in the provision of oral health care by a licensed dentist. These products include crowns, bridges, dentures and other dental products. Dental lab technicians follow a prescription from a licensed dentist when manufacturing these items, which include prosthetic devices (such as denture teeth and implants) and therapeutic devices (such as orthodontic devices). The FDA regulates these products as medical devices and they are therefore subject to FDA's good manufacturing practice ("GMP") and quality system ("QS") requirements. In most cases, however, they are exempt from manufacturer registration requirements. Some of the most common restorations manufactured include crowns, bridges, dentures, and dental implants. D