Prepare patient, sterilize and disinfect instruments, set up instrument trays, prepare materials, and assist dentist during dental procedures. Taking digital X rays, Helps dentist manage dental and medical emergencies by maintaining CPR certification, emergency drug and oxygen supply, and emergency telephone directory. Ensures operation of dental equipment by completing preventive maintenance requirements; following manufacturer’s instructions; troubleshooting malfunctions; calling for repairs; maintaining equipment inventories; evaluating new equipment and techniques.