Key duties associated with assisting the dentist in starting treatment include: utilizing x-ray time to promote the good qualities of the dentist, learning the patient's expectations while educating them with intra-oral pictures, using effective and anticipatory chair-side skills, and effectively supporting the dentist's diagnosis after the examination when the patient asks questions. Prepare tray setups for dental procedures, present instruments and materials to dentists and keep patients' mouths dry and clear by using suction or other devices and sterilize and disinfect instruments, equipment, and operatories in accordance with the American Dental Association guidelines.