Usually yes, until Monday - as long as there is no red spot
- A filling has come out or a tooth has chipped: with no red spot at the base of the cavity, no spontaneous pain and no swelling, the cavity can usually wait until the next working day. With any one of those signs, and also with a loose tooth or bleeding that cannot be stopped, the appointment is for today.
- One thing settles it, and it is visible to the naked eye. Is there a red or bleeding spot at the base of the cavity? That is exposed pulp, the tissue holding the nerves and blood vessels inside the tooth, and then the appointment is for today. The shorter the pulp stays exposed, the better the chance of keeping it, although exactly how many hours count is not known.
- Keep the broken-off fragment wet, in milk or in saline. A dried-out fragment loses its usefulness for reattachment.
- Do not glue it, do not plug the gap with cotton wool, do not put a painkiller tablet against the gum.
- The absence of pain is no proof that the tooth is safe. When the hard tissues are damaged, pain arrives late.
"Can this wait until Monday?" Usually yes, though not always, and you can judge it yourself in a matter of seconds: all it takes is a look at the base of the cavity. This is about two situations, one where a filling has come out and one where a small piece of the crown of the tooth has broken off. A loosened prosthetic crown that has slipped off is governed by a different set of rules, set out in the article on what to do when your crown has come out, and a tooth suspected of having a crack is covered by a separate article on when a cracked tooth can be saved.
Why has the filling come out now, of all times?
Rarely for a single reason. A restoration does not fall out because "the glue gave way". What usually fails is the boundary between the material and the tooth, or the wall of the tooth around the restoration, weakened by years of chewing.
Almost half of composite restorations in posterior teeth required no intervention at all over the entire observation period, which reached 33 years; this was counted on 683 restorations placed in 100 patients in a single private practice. The two dominant causes of failure were fracture and secondary caries, and the risk rose with large restorations and in upper molars.
These figures come from one practice, so they show what is achievable with continuous care and regular check-ups rather than a population average. A patient who only turns up at the dentist when something is already happening has a different prognosis, and no study will improve it for them. The same picture of causes emerges from a summary of five studies with random allocation to groups, covering 627 restorations in total. All five were judged to be at high risk of bias and the quality of the evidence was rated as very low, so the ranking of the causes is treated as indicative only.
So when a filling comes out, it is usually not an accident but the end of a process that has been running for months and gave no symptom at all for most of that time. A delay of a dozen or so hours settles nothing in it.
What does settle something is what can be seen inside the cavity.
The first twenty-four hours: what to do, in order
The typical situation is one where a filling has come out or the edge of a tooth has chipped, there was no blow to the face and there is no swelling; the first day then looks like this.
The first few minutes. Rinse your mouth with lukewarm water to remove the debris. Find the broken-off fragment, even if it looks useless, and put it straight into a small container with milk or saline. Do not let it dry out. Run your tongue over it to check whether the edge is sharp. Then look at the cavity in a mirror in good light: you are looking for a red, moist or bleeding spot at the base of the cavity. A pale, matt surface is dentine, the layer beneath the enamel, and that is not an urgent situation. A red spot is pulp and it changes everything. In a tooth that has had root canal treatment there is no pulp left, so this test rules nothing out and the remaining warning signs are what count.
The first hour. Ring the practice and describe two observations: whether there is a red spot at the base of the cavity and whether pain comes on by itself. A red spot or pain without a trigger means an appointment today. Without either, the next working day is enough.
Until the end of the day. Chew on the other side. Go easy on very cold and very hot things, because exposed dentine reacts to temperature. Brush the tooth normally, including around the cavity; dental plaque in an open cavity works against you. Keep using floss, but in this one place slide it out sideways. Do not pull it out vertically: it can lever a weakened wall. If the floss frays or catches, stop and mention it at your appointment.
Evening and night. Out of hours and at weekends the practice will not pick up. If none of the warning signs is present - no red spot, no spontaneous pain, no swelling, no loose tooth and no bleeding that cannot be stopped - a message or a phone call in the morning on the next working day is enough. If a sign is present, look for an out-of-hours emergency dental service. Spreading facial swelling with a fever, or with difficulty opening the mouth or swallowing, is not a matter for a phone call to the practice but for emergency care, at night and at weekends too.
The next morning. Take the fragment in its fluid with you to the appointment, and over the phone give four things: when it happened, whether there is a red spot, whether pain comes on by itself and what painkillers you have taken.
What can I do myself before I get to the practice?
Less than instinct suggests, and that is good news - when a filling has come out, the task for the next few hours is simple: do not cut yourself, do not make the tooth worse and do not make the dentist's job harder.
After meals, rinse your mouth with lukewarm water or a solution of table salt so that the cavity left by the filling does not collect debris. If the edge is cutting your tongue, cover it with orthodontic wax. Pain, should it appear, is managed by a painkiller taken by mouth. For pain of dental origin, the usual choice is a non-steroidal anti-inflammatory drug, provided there are no contraindications: stomach or kidney disease, asthma, pregnancy, regularly taken medicines. That is settled by the package leaflet or by a pharmacist. If the medicine stops working before the interval given in the leaflet has passed, ring the practice. Do not increase the dose. Keep the broken-off fragment in milk or saline and take it with you to the appointment. That is everything that makes sense until the appointment, and apart from one exception described below there is no repair procedure here at all.
When a filling has come out, the list of harmful things is short and matters more than the list of permitted ones.
| What you may do | What not to do | Why it matters |
|---|---|---|
| Rinse, cool, chew on the other side | Glue the filling or the fragment back with household adhesive | The adhesive then has to be removed with a drill, along with a layer of healthy tissue |
| Cover a sharp edge with wax | Pack the cavity with cotton wool, tissue or chewing gum | The material absorbs saliva and becomes a breeding ground for bacteria |
| Take a painkiller by mouth | Put a painkiller tablet against the gum | It risks a chemical burn of the mucosa, and it does not relieve toothache |
| Keep the fragment in milk | File down the sharp edge yourself | A file removes enamel irreversibly and exposes dentine |
What not to do: adhesives, cotton wool and a tablet on the gum
Household cyanoacrylate adhesive is not a material for use in the mouth. It irritates the tissues, and a glued tooth surface then has to be prepared with a drill, so the cavity after such an operation is larger than it was before. With a prosthetic crown the same ban on gluing applies, along with a separate set of steps.
Cotton wool, tissue or chewing gum. Plugging the cavity seems sensible, because the draught goes away and food stops getting in. In a moist, warm cavity, however, absorbent material becomes a culture medium, and pushed under the gum it provokes a local inflammation that then has to be treated separately.
A painkiller tablet placed on the gum is the oldest of these ideas and the most harmful. Acetylsalicylic acid applied to the mucosa causes a chemical burn, that is, a white, painful loss of the surface layer. It will not bring relief anyway: painkiller tablets only work once they have been absorbed from the digestive tract.
About ready-made temporary filling materials nothing certain can be said today, because clinical studies in this situation are lacking. The risk lies not in the material itself but in the fact that a closed cavity stops reminding you it is there and the appointment slips by weeks. So the condition is simple: such a material makes sense only when an appointment has already been booked and falls within the next few days.
A temporary filling placed without a booked appointment is precisely the thing that will push that appointment back.
Can it wait until Monday?
Most often, yes. When a filling has come out, there is one condition: none of the five warning signs is present, and each of them on its own means contacting the practice the same day.
- A red or bleeding spot at the base of the cavity, that is, exposed pulp.
- Pain that comes on without a trigger, waking you at night or not settling once the cold stimulus is removed.
- Swelling of the gum around the tooth, even without a fever.
- A loose tooth or a change in its position after an injury.
- Bleeding from the gum with a broken tooth that cannot be stopped by pressure.
Separately and more urgently: spreading facial swelling with a fever, or with difficulty opening the mouth or swallowing. That is not a matter for a phone call to the practice but for emergency care, at night and at weekends too.
With exposed pulp it is not only the fact that counts but the time as well. The longer the pulp stays exposed, the smaller the chance that it can be kept alive rather than removed in full. How many hours you may wait is not known - and that is the reason to ring today rather than set your own deadline.
If no sign is present, the cavity can safely wait until the next working day; a sharp edge cutting the tongue, a day or two at most. What it cannot do is wait for weeks.
What to do when a sharp edge of the tooth is cutting your tongue
A chipped tooth leaves an edge of enamel that can be as sharp as a shard of glass and within a few hours can produce a painful ulcer on the side of the tongue. The wound heals on its own, but only once the cause has been removed: after the edge has been smoothed it usually settles within a few days, and until then soft food and rinsing with lukewarm salt water help. An ulcer that fails to heal for more than two weeks despite the cause having been removed needs to be shown to a doctor.
As a temporary measure, a cover helps: a piece of orthodontic wax warmed in the fingers and pressed onto the edge. Wax will last one night, but not a week: it comes away while you eat and stops protecting exactly when the tongue is most exposed. You can buy wax at a pharmacy and at an orthodontic shop, but in the evening it can be impossible to get hold of before morning; there is no good household substitute here, because cotton wool, tissue and chewing gum are ruled out for the same reasons as with a cavity. Until morning, what is left is soft food and not provoking the edge with your tongue.
What not to do: do not file the edge down with a nail file or with sandpaper. Enamel that has been removed cannot be restored, and exposed dentine starts to react to cold. Smoothing the edge at the practice takes a few minutes and in typical clinical cases does not require anaesthesia.
What the dentist will do, and what the extent of the repair depends on
The extent of the repair is decided by how much of the tooth wall is left and whether the pulp is exposed. When a filling has come out and the cavity is small, a new filling is enough; where a cusp has been lost, rebuilding damaged teeth with an inlay comes into play, and with greater loss of the wall, a crown. The same criteria underlie the choice of restoration in cases where an ordinary filling will no longer close the cavity.
If you have kept the fragment, reattaching it can be the most favourable option aesthetically in the front teeth, with a caveat that patients usually do not hear: the data on the durability of reattached fragments are divergent. A reattached fragment was still in place in an estimated 83.7% of teeth after two years, 75.2% after five and 56.4% after ten. This was calculated in a single retrospective series of 75 fractures of front teeth. A second study, covering 235 teeth after injury, counted it differently: after two years, an estimated 42.9% of reattachments survived without further intervention, against 65.0% of composite restorations, meaning that reattached fragments required a further procedure more often than composite restorations did.
These figures cannot be averaged, because the two studies measured different things: the second also counted pulp necrosis as a failure, so it described a broader category of events. Milk and saline are, in any case, environments described in the literature as being used to store a fragment. A direct comparison of which of them is better is not contained in the studies cited here.
The extent of the repair also depends on whether the fracture was accompanied by displacement of the tooth. A fracture without pulp exposure and without displacement ends in success, meaning a vital pulp and a durable restoration, in 82.3% of teeth; a fracture with exposed pulp, likewise without displacement, in 72.3%. This was calculated on 419 and 101 teeth respectively, from a series of 616 crown fractures of permanent teeth, with a mean follow-up of about a year and a half. Accompanying luxation of the tooth lowered both percentages.
Frequently asked questions
Is it worth keeping the broken-off piece of tooth?
Yes, and regardless of how it looks. A fragment stored in milk or saline can, in the front teeth, be reattached, which gives the truest colour match. A dried-out fragment loses that value. The fragment on its own settles nothing. Taken to the appointment, however, it opens up an option the dentist will otherwise not have.
Can a filling be glued back in?
No. Once a filling has come out, it is no longer fit for reuse: its surface has lost its bond with the tooth and the shape of the cavity has had time to change. Household adhesive then has to be removed with a drill along with a layer of healthy tissue, so an attempted repair enlarges the cavity instead of closing it.
Is a cavity that does not hurt safe?
No. When the hard tissues are damaged, pain arrives late, often only once the process reaches the pulp. The absence of symptoms says nothing certain about the pulp. Irreversible inflammation, after which the pulp will not recover, and even its death, can run a painless course. A cavity without symptoms collects plaque and food debris, and its edges chip away further with every bite.
How long can I wait for an appointment?
Without spontaneous pain, without visibly exposed pulp and without swelling, the cavity can wait until the next working day. With any one of those symptoms, and also with a loose tooth or bleeding that cannot be stopped, the appointment is for today. Putting the visit off for weeks, on the other hand, turns a simple repair into a bigger procedure, because the cavity gets larger.
Can a broken-off edge of a central incisor be rebuilt?
Yes, usually in a single appointment. The choice depends above all on how complete the fragment is: with an incomplete one, layered composite build-up is the usual route. A reattached fragment gives the truest colour, but after two years it was still in place in an estimated 83.7% of teeth in a series of 75 fractures; in the second study, an estimated 42.9% of 59 reattachments required no further intervention, counting treatment of pulp necrosis. The two studies cannot be averaged, because they measured different things.
Will a tooth like this need root canal treatment?
Not always. With a fracture without pulp exposure, root canal treatment is usually not needed, and the tooth requires a restoration and monitoring. An exposed pulp is first of all approached with an attempt to keep it alive. Partial pulpotomy, that is, removal of only the superficial, inflamed layer, succeeds in 82.9-100% of teeth. That was the result of a review of fourteen studies covering 1081 teeth treated by various methods, mostly case series of low evidence quality.
So what about that Monday?
The order of urgency is short and reads from the top. Exposed pulp, spontaneous pain, swelling, a loose tooth or bleeding that cannot be stopped mean contacting the practice the same day, and spreading facial swelling with a fever means emergency care. A sharp edge cutting the tongue is a day, two at most. A smooth cavity without symptoms can safely wait until the next working day.
If this evening you see no red spot at the base of the cavity, nothing hurts by itself, nothing is swelling, the tooth is not loose and nothing is bleeding, you need do nothing beyond putting the fragment in milk and ringing in the morning. If any one of those conditions is not met, Monday is too late. And the absence of pain is no measure of the state of the tooth: when a filling has come out, the tooth has no sensor that switches on at the moment when the repair stops being simple.
Read more:
- Aesthetic and Restorative Dentistry in Warsaw
- Your crown has come out - what to do before you reach the practice
- A cracked tooth - when it can be saved and when it must be removed
- Composite filling, ceramic inlay or crown: what decides is how much tooth is left
- Secondary caries: when an old filling really needs replacing, and when it can be left alone
Content and liability disclaimer
This article is informational and educational in nature and does not constitute medical advice, a diagnosis or a therapeutic recommendation — it does not replace a consultation with a specialist. If you are experiencing symptoms, have doubts or are facing a decision about treatment, consult a dentist. The methods described and the data cited are general in nature. The results of scientific studies relate to populations, not to an individual patient. The course and outcome of therapy depend on the individual clinical situation and may vary between patients. No information contained in this article constitutes a guarantee of result. The content has been prepared with due care, based on publicly available medical knowledge and the scientific publications indicated in the Sources section. We do not advise taking or refraining from any health-related action solely on the basis of the content of this article, without prior consultation with a doctor.
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