The duties of a certified dental assistant depend on the type of office where they work and the regulations and license required by their state. Being certified allows them to meet with patients, prepare dental equipment, and educate patients on oral care. Some states authorize certified dental assistants to perform x-rays, while others only allow the assistant to process them. Other responsibilities include assisting the dentist while examining patients, keeping accurate records, scheduling appointments, and answering patient questions on billing and services.