You may want to arrive early to fill out any needed paperwork or update your dental records. You are encouraged to brush your teeth before your dental appointment. If you've missed any food particles or stains while brushing, they will be removed by your hygienist. The time of your appointment might indicate whether or not you want to eat before your visit. Some people who are anxious about going to the dentist might want to avoid eating to prevent nausea in the dentist's chair.