Dental technicians make and repair dental restorations such as dentures, bridges, crowns, fillings, braces and other orthodontic correction appliances. They follow the directions or prescriptions of a dentist and do not deal with patients themselves. When a denture has to be made, the dentist obtains impressions of the patient's gums and palate, from which the technician makes a model. After this has been modified for comfort, the final denture is cast in an acrylic material or artificial resin.