They may also remove sutures, apply anesthetics and cavity preventive agents to teeth and gums, remove excess cement used in the filling process, and place rubber dams on the teeth to isolate them for individual treatment. Those with laboratory duties make casts of the teeth and mouth from impressions taken by dentists, clean and polish removable appliances, and make temporary crowns. Dental assistants with office duties schedule and confirm appointments, receive patients, keep treatment records, send bills, receive payments, and order dental supplies and materials. Dental assistants should not be confused with dental hygienists, who are licensed to perform different clinical tasks. Their work area is usually near the dental chair, so they can arrange instruments, materials, and medication, and hand them to the dentist when needed.
Dental assistants wear gloves and masks to protect themselves from infectious diseases.
Following safety procedures minimizes the risks of handling radiographic equipment. More than 3 out of 10 worked part time, sometimes in more than one dental office. Virtually all dental assistants work in a private dental office. A small number work in dental schools, private and government hospitals, State and local public health departments, or in clinics. High school students interested in a career as a dental assistant should take courses in biology, chemistry, health, and office practices.