The tooth filling procedure takes one visit and usually under an hour. Your dentist numbs the area, removes the decay, cleans and dries the space, places the filling material, shapes it, and checks it against the tooth above. You leave with the numbness wearing off over the next few hours.
Before the appointment: how the cavity gets found
Most cavities are found before you ever notice them. Mayo Clinic is blunt about it: when a cavity is just beginning, you may not have any symptoms at all. It is found by someone looking, not by you feeling something.
What your dentist did was look around the tooth, probe the surface for a soft spot, and read an X-ray. Decay between two teeth hides from the first two of those and shows up on the third, which is why the X-ray gets taken even when nothing looks wrong.
A cavity that is not bothering you still needs treating, because enamel does not repair itself once decay has opened a hole in it. Left alone, the decay reaches the softer layer underneath and keeps going. That is a reason to book the appointment, not a reason to hurry.
Step by step: what happens during a filling
Six steps, in this order:
- A numbing gel goes on the gum first, then local anesthetic is given by injection. The gel takes the edge off it, and for most people the injection is the sharpest moment of the visit.
- Your dentist waits for the anesthetic to take hold, usually a few minutes, and checks it has worked before starting. Say so if the tooth still feels alert, because that check is the point of asking.
- The tooth is isolated and kept dry, either with cotton rolls and a suction tip or with a thin sheet of rubber clipped around the tooth. Composite will not bond to a wet surface, so this step is doing real work.
- The decay is removed with a handpiece, and sometimes with a small hand instrument for the last of it. Expect vibration, pressure, and a high sound. The tooth itself should not register.
- The space is cleaned, dried, and the filling material is placed. Composite goes in as a soft paste in layers, and each layer is set hard with a blue light held against it for a few seconds.
- The filling is shaped to match the tooth, then you bite on a strip of marking paper so any high spot can be smoothed down. Getting that right is what stops the tooth feeling odd for the next week.
The material itself is a short conversation rather than a long one. If you want an opinion going in, read up on which filling material suits which tooth beforehand. Your dentist will tell you what they are using either way.
Nothing in that sequence requires you to do anything except keep your mouth open and say if something feels wrong. That is genuinely the whole of your job.
How long does a filling take?
Most fillings take 20 to 60 minutes, depending on the size of the cavity and which tooth it is in. That figure is the working time. Add a few minutes at the start for the anesthetic to take hold, which is the part most estimates leave out.
What pushes it toward the top of that range is a deeper cavity, a tooth at the back where access is tighter, or more than one tooth being treated in the same sitting.
Two fillings in one appointment usually take less total time than two appointments would, since the numbing is shared. Worth asking about if you have several to do, alongside what doing them together changes about the cost.
What it actually feels like
Being specific about this is more useful than reassurance, so here is what registers and what does not.
The injection is a sting for a couple of seconds, then a spreading heaviness in the lip or the side of the tongue. That heaviness is the part that tells you it worked.
During the decay removal you feel pressure and vibration through the jaw rather than through the tooth. The sound is high and close, and it is louder inside your own head than it is in the room. Some people find the sound harder than the sensation, and headphones are worth asking about.
There is water spray and a suction tip working alongside it, so the sensation is also wet and cold. The rinse at the end tastes faintly of nothing in particular.
What you should not feel is the tooth. If a sharp sensation gets through, the anesthetic has not fully taken or it needs topping up, and both are quick to fix in the moment.
You can raise a hand at any point and your dentist will stop. That is an ordinary signal in every dental office, it is not an imposition, and having it available is the thing most anxious patients want to know before they sit down.
What to expect right after
- The numbness lasts a few hours. Avoid chewing on that side until it has gone, since a numb lip or cheek is easy to bite without noticing.
- A composite filling is set hard before you leave, so there is no waiting period before eating. Your dentist will say if the material used needs one.
- Some sensitivity to cold and to biting is common in the days afterward, because the tooth has been worked on. It should ease steadily rather than build.
- Sensitivity that is getting worse rather than settling, or a tooth that is uncomfortable to bite on after the numbness has gone, is worth a call. A filling sitting slightly high is a two-minute adjustment.
- Fillings do not last forever. The National Institute of Dental and Craniofacial Research says plainly that fillings and crowns generally do not last a lifetime and may need replacing, which is what the check at each visit is for.
When a filling is not the right fix
Past a certain amount of lost structure, a filling has nothing solid to hold onto. Mayo Clinic describes crowns as the answer where there is a lot of decay or the tooth has been weakened, and a root canal where the decay has reached the pulp.
There is also a middle option between those two. An inlay or an onlay is made outside the mouth and bonded in. It covers more than a filling does while leaving more of the tooth than a crown does.
Where a restoration that size is the answer, some offices mill it on site and place it in the same visit rather than sending it to a lab.
A cavity can also turn out larger once the decay is out, so being told mid-appointment that the plan has moved up a rung is normal rather than a sign anything went wrong.
If you have a filling booked, asking what to expect at the start of the appointment is a reasonable thing to do. Our filling treatment sets out what we use and why.
If you have not booked yet and something has been putting you off, schedule an appointment with our Rohnert Park office and tell us that when you call. We move at your pace. No pressure.
