A filling that fell out and left no pain behind is usually not a same-day emergency. The tooth is now open to food, bacteria and bite pressure, though, so it should be seen within days, not weeks. Call sooner if the tooth starts to hurt, a sharp edge is cutting your tongue or cheek, or a piece of the tooth came out with the filling.
Why doesn't a filling that fell out hurt?
No pain means the nerve is not reacting yet, and the tooth is still open. Most fillings sit in dentin, the layer under the enamel, and dentin that has spent years under a filling is less reactive than dentin exposed for the first time. The first hours are often silent for that reason.
It rarely stays that way. The same tooth often turns sensitive to cold or sweet within days as the open dentin starts reacting. If that happens, read our guide on why a tooth gets sensitive to cold and sweet.
The repair itself is routine. A filling that came out is replaced with tooth colored fillings in most cases. How long the tooth sat open decides how big the repair gets.
What changes if you wait?
A lost filling that waits usually grows from a one-visit filling into a larger repair, because the open tooth reacts, packs with food and can lose a wall. The table shows what changes, and when.
| When | What is happening | What it means |
|---|---|---|
| Tonight | The cavity is open but clean. Food can pack into it. | A straightforward replacement filling, often in one visit. |
| The next few days | Exposed dentin reacts to cold and sweet. Trapped food feeds bacteria against bare tooth. | Still usually a filling. Sometimes a short wait for the tooth to settle. |
| Weeks | Thin walls take bite pressure with no support. New decay starts under the old margins. A wall can crack or break off. | A larger filling or an onlay. A crown if a wall is lost. |
The last row is the one to avoid. The original hole rarely turns a filling into a crown. More often it is the damage the unsupported tooth takes while it waits, and a wall breaking off during a meal is a common way that wait ends. A tooth that does not hurt is still a poor reason to put the visit off. Once the open spot starts to ache, we answer how urgent a hole in a tooth is in its own post.
What should you do tonight?
Rinse gently with warm salt water after eating to keep the hole clear, and brush as normal, carefully around the open spot. Chew on the other side, and skip anything very hot, very cold, sticky or hard until the tooth is repaired. If part of the tooth came out along with the filling, keep the piece so we can see what broke.
The American Dental Association's MouthHealthy guidance on dental emergencies says a lost filling should be seen by a dentist as soon as possible, and it suggests over-the-counter dental cement as a temporary cover. Treat pharmacy temporary filling material the same way, as a short stopgap, follow the package, and do not use it if the tooth hurts.
For any ache that shows up, an over-the-counter pain reliever you already know is safe for you, taken as the label directs, is the usual choice. Check with your doctor or pharmacist first if you take a blood thinner, have kidney, liver or stomach problems, or are pregnant.
When does a lost filling become urgent?
A lost filling with no pain can be seen in the next few days. Call the same day if any of these apply:
- the pain is building
- a sharp edge keeps cutting your tongue or cheek
- a cusp or wall of the tooth broke off
- the gum beside the tooth is swelling
- the filling came out of a tooth that already had a root canal
A few signs mean the hospital first:
- trouble breathing or swallowing
- swelling that reaches the eye, spreads down the neck or under the jaw
- fever with facial swelling
- cannot open the mouth
- bleeding that will not stop with firm pressure
- confusion, rapid heartbeat, or feeling very unwell
- a knocked or loose tooth after a blow to the head with any loss of consciousness
Those mean the emergency room or 911 now, then call the office so the tooth itself gets treated. For everything in between, see our guide to what counts as a dental emergency right now.
We are open Monday through Friday, 9:00 AM to 5:30 PM. Outside those hours, leave a message, and urgent calls are returned first thing.
What happens at the visit?
We check how much sound tooth is left around the hole, with an X-ray if it is deep or the old filling was large. When the walls are intact, the filling is usually replaced the same visit with a tooth colored material matched to the tooth. A new filling may feel cold for a while, and our guide to how sensitivity after a filling fades tells you what is normal.
When a wall is gone or the remaining tooth is thin, a filling would not hold up to chewing. The better repair is then an onlay or a same day CEREC crown, milled in the office, so the tooth is usually finished in one appointment.
If you spend the winter here, have the filling replaced here instead of waiting for your home dentist in April. A tooth left open for a season often comes back needing a crown.
What if it was an old silver filling?
Old amalgam fillings often lift out in one piece after years of service. The metal expands and contracts with hot and cold a little differently than the tooth around it, and the seal at the edge eventually gives. That happens to old amalgam fillings from any office, and it does not mean something was done wrong. Fillings often give warning first, and there is a separate post on the signs an old filling needs replacing.
Other amalgam fillings of the same age are worth checking at the same visit, though an intact amalgam that is causing no problems does not always need to come out. Our post on safe removal of old amalgam fillings explains how we handle it when it is time.
Get the tooth closed before it changes
A filling that fell out without pain is a small problem today and can be a much bigger one in a few weeks. Call (727) 869-3886 or use our contact page to book a visit in the next few days, and keep the tooth clean and lightly used until then. This article is general information, not a diagnosis. Dr. Estrada decides what the tooth needs at the exam.
Frequently Asked Questions
Will the dentist need to numb me to replace a filling that fell out?
Often, yes, because the old cavity usually needs a light clean-up before the new filling goes in, and that is more comfortable with the tooth numb. If the hole is shallow and the tooth is not sensitive, it can sometimes be done without numbing. Dr. Estrada decides at the visit based on how the tooth reacts.
Is it safe to leave the hole open for a few days?
For a tooth that does not hurt, a few days of waiting is usually not a problem if you keep the area clean and chew on the other side. The risk builds with time. Sensitivity tends to appear within days, and cracking or new decay becomes more likely over weeks. Book the visit for the next few days.
Why did my filling fall out with nothing else going on?
Fillings from any office fail without warning for several reasons. The seal at the edge opens over the years, a little decay develops underneath and loosens it, the tooth flexes under heavy chewing or grinding, or the filling has reached the end of its working life. Sticky or hard food is usually only the final tug.
Should I use temporary filling material from the pharmacy?
Only as a short stopgap when you cannot be seen for a few days, and only if the tooth is not hurting. Follow the package directions, keep the layer thin, and do not use it on a tooth that is sensitive or aching. It covers the hole until the visit. It does not repair the tooth.
