Some people skip breakfast before a dental visit, thinking an empty stomach is expected. For a check-up, a clean, a filling or an extraction with a local anaesthetic, it is not. Eating normally beforehand is fine, and a light meal often makes the visit easier. Fasting matters mainly when you are booked for sedation through a drip or a general anaesthetic, and then the instructions you are given should be followed exactly. For any other type of sedation, follow the eating instructions you are given when you book.
Numbing injections do not call for an empty stomach
A local anaesthetic numbs a small area of the mouth while you stay fully awake and in control of your swallowing and breathing. There is no medical reason to fast for it. That covers most dental care: examinations, scale and clean appointments, fillings, crowns, root canal treatment and most extractions.
The numbness does affect the hours afterwards. While your lip, cheek or tongue is numb, chewing is awkward and it is easy to bite yourself without noticing, and hot drinks can scald. Eating before the appointment means you are not hungry while waiting for feeling to return. Our article on how long dental numbness lasts explains when it is safe to eat again.
Sedation and general anaesthetic change the rules
Deeper sedation and general anaesthesia reduce the reflexes that normally protect your airway. If the stomach is full, there is a risk of its contents coming back up and being breathed into the lungs. That is why fasting is required.
Australian and New Zealand anaesthesia guidance, as summarised by Safer Care Victoria, asks adults to fast from solid food for at least six hours before an elective procedure. Many hospitals now let patients keep sipping small amounts of clear fluid until they are called in, but local rules vary. Whoever is providing the sedation or anaesthetic will give you specific times. Lumi offers IV sedation but not general anaesthetic, and if you are booked for IV sedation with us, follow the fasting instructions you are given. If you eat inside that window, the procedure may have to be postponed for your safety.
Relative analgesia, often called happy gas, is a lighter form of sedation and the advice on eating is different again, so ask for instructions when you book.
Timing a meal around the appointment
For routine care, eating something light an hour or two before tends to work well. It keeps your energy steady, which helps if you feel nervous or if the appointment is a long one, and you are less likely to feel faint. A heavy meal right before lying back in the chair can feel uncomfortable, and strongly flavoured food such as garlic is kinder to everyone if followed by a brush.
A few other points help the visit go smoothly:
- Brush and floss after eating if you can. Clean teeth make it easier to examine the gums and see the surfaces of the teeth.
- If you have diabetes, keep to your usual meal and medicine routine for local anaesthetic visits, and ask for specific advice if sedation is planned.
- Bring a water bottle. Water is fine before any routine appointment.
- If you are having whitening, plan around darker foods and drinks for the following day, as described in our guide to in-chair whitening.
What to expect from the most common visits
If you would like to know more about a particular appointment before you come in, we have separate guides on what happens at a scale and clean, having a filling and an adult's first dental visit.
Quick answers
Can I eat before having a tooth taken out?
Yes, if it is being done with a local anaesthetic. A light meal beforehand is sensible because you will need to be careful with food for a while afterwards. Fasting applies only if the extraction is planned under sedation or general anaesthetic.
Can I have a coffee before a check-up?
Yes. A glass of water or a rinse afterwards helps, and brushing is better still.
I forgot and ate before my sedation appointment. What should I do?
Call the practice or the sedation provider before you set out and tell them exactly what you had and when. They will decide whether it is safe to go ahead.
If you are not sure how to prepare for a treatment you have booked, give us a call and we can talk you through it. Our general dentistry page explains the care we provide in Melrose Park, and our offers page lists what is available for new patients.
This article is general information only and is not a substitute for personal dental advice. Please follow the instructions given by your own dental clinic.
