What to Do If You Lose Your Temporary Crown Before the Final One

There is a small but important distinction that changes how this situation should be understood. A definitive crown coming off suggests something has gone wrong. A temporary crown coming off is, to a large extent, the material behaving as designed.

Temporary crowns are held with a deliberately weak cement, because at the fitting appointment they need to come away without damaging the preparation underneath. The trade-off is that they sometimes come away earlier than intended.

That said, the tooth underneath does need protecting in the interim, and for reasons that are more specific than general caution — the prepared tooth is the shape the laboratory has already worked to, and if it changes, the crown may no longer fit.

It is easy to assume a temporary is purely cosmetic. It has at least five jobs.

Protecting exposed dentine. The preparation has had enamel removed, leaving dentine with open tubules that connect to the pulp. That is why the tooth is sensitive once the temporary is off.

Maintaining the space. Adjacent teeth drift towards a gap and the opposing tooth over-erupts. Both begin within days, not months. If enough movement occurs, the crown made to the original scan or impression no longer seats.

Maintaining the gum shape. The gum around the preparation follows whatever contour is presented to it. Without the temporary, the papillae between the teeth can collapse into the space, and the margin of the final crown may then sit awkwardly against tissue that has changed shape.

Protecting the pulp. Continuous thermal and bacterial insult to exposed dentine can provoke pulpal inflammation. Occasionally this is what turns a straightforward crown into one preceded by root canal treatment.

Letting you eat and speak. The least clinically important function, and usually the one that prompts the phone call.

Weak cement by design. Temporary luting cements are formulated to release. This is the single most common reason, and it is not a fault.

Sticky food. Toffee, chewing gum, dried fruit and soft bread apply a pulling force in exactly the direction the cement resists least.

Flossing straight up. Flossing between a temporary and the neighbouring tooth and then pulling the floss back up vertically will often lift the temporary with it. Pull it out sideways instead.

A short or tapered preparation. Where there is limited tooth height above the gum, there is less surface for even a definitive cement to grip, and temporaries on such teeth come off repeatedly. This usually signals that the final crown will need particular attention to retention, or that crown lengthening may be worth considering.

A poorly adapted temporary. A temporary that is bulky, high in the bite, or does not follow the margin closely is under more load and holds less well.

Grinding. Nocturnal bruxism applies forces well beyond normal chewing. See how stress leads to teeth grinding.

Keep the temporary. Even a chipped one can often be recemented, which is quicker than making a new one. Put it in a small rigid container, not a tissue.

Rinse your mouth with warm water. Cold will be uncomfortable against the exposed dentine.

Check what came off. If the inside is hollow and clean, the cement simply released. If there is tooth material inside it, part of the preparation has come away, and that needs assessing before the final crown is fitted.

Ring the practice. This is usually a short appointment rather than an emergency, but it should be days rather than weeks.

Try it gently, once. If the temporary seats easily and fully, you know it can be refitted. Do not force it — a temporary lodged at the wrong angle is harder to remove than it sounds.

Temporary dental cement from a pharmacy is designed for this and is reasonable to use if the temporary seats cleanly. A thin layer, excess cleaned off at the margin, dried tooth and crown as far as possible. It will not hold as well as a professionally placed temporary, so treat it as a stopgap.

Do not use household adhesives. Superglue is not a dental material, is difficult to remove, and can damage the preparation that your final crown has to fit.

Chew on the other side. A prepared tooth is narrower and has lost structural support. A cusp fracturing at this stage is a genuine setback.

Avoid temperature extremes, particularly cold drinks and ice.

Keep brushing the area with a soft brush. A clean preparation matters — plaque left against exposed dentine for a week is not harmless.

Floss carefully, or use an interdental brush, pulling sideways rather than upwards if the temporary is back in place.

Desensitising toothpaste rubbed onto the tooth and left rather than rinsed off can reduce sensitivity noticeably.

The common assumption is that since the final crown is coming anyway, a fortnight without a temporary does not matter. It can.

Tooth movement is the main problem. Drift and over-eruption of a few tenths of a millimetre are enough to prevent a crown seating, and remaking it means a new scan, a new laboratory stage and another appointment.

Gum changes. Tissue that has collapsed or become inflamed around an unprotected margin makes accurate fitting and cementation harder, and can affect the appearance of the finished crown at the gum line. How crown margin placement affects gum health covers why that junction matters.

Fracture of the preparation. The most significant risk, because a cusp that breaks below the gum can change the plan from a crown to something considerably more involved.

Pulpal problems. Sustained exposure occasionally tips a previously settled tooth into irreversible pulpitis, described in our article on that threshold.

None of these are common in a few days. All become more likely over weeks.

The tooth is examined, the temporary inspected, and the fit checked against the preparation.

Then one of three things:

Recementing the existing temporary, which is the usual outcome and takes a few minutes.

Making a new temporary, if the old one is broken, distorted or no longer fits because of tissue changes. This is a chairside procedure.

Bringing the fitting appointment forward, if the final crown is nearly ready. Sometimes the simplest solution to a recurrent temporary problem is to fit the definitive restoration sooner.

If the temporary has come off more than twice, it is worth asking why. Repeated loss on the same tooth usually reflects the shape of the preparation rather than bad luck, and knowing that before the final cementation is useful — it may influence the cement chosen, or whether the preparation is modified.

Our guides on what happens after a crown is fitted and on cement washout in definitive crowns cover the stages either side of this one.

Is losing a temporary crown an emergency?

Not usually. It is urgent in the sense that it should be dealt with within a few days rather than left, but it is rarely a same-night problem unless there is significant pain or a sharp edge causing trauma.

Can I just wait for my fitting appointment?

If the appointment is in a day or two and there is no discomfort, possibly. If it is a week or more away, refitting is worthwhile — tooth movement and gum changes over that period can prevent the final crown from seating.

Will it hurt without the temporary?

The exposed dentine is commonly sensitive to cold, sweet and air. Sharp lingering pain or spontaneous pain is different and should be reported promptly.

Does this mean the final crown will fall off too?

Not necessarily. Temporary cement is much weaker than definitive luting cement, so a temporary coming off says little about how the final crown will hold. Repeated loss, however, may indicate limited retention in the preparation, which is worth discussing.

Can I eat normally?

Chew on the other side and avoid sticky and hard foods until the temporary is back in place.

What if I swallowed it?

Swallowing is generally not harmful and it passes naturally. A new temporary will be needed. Persistent coughing or breathlessness afterwards needs urgent medical assessment, since inhalation rather than swallowing is the concern.

If your temporary has come off, keep it, avoid chewing on that side, and ring the practice — refitting is usually a brief appointment and it protects the fit of the crown you are waiting for.

You can contact our team at our Wimpole Street practice. Our dental crowns page explains the full treatment sequence.

This article provides general information about temporary dental crowns and does not constitute individual dental advice. The condition of the prepared tooth and the suitability of refitting a temporary can only be assessed clinically. If you experience severe pain, swelling or fever, seek urgent care. Wimpole Dental is regulated by the Care Quality Commission, and our clinicians are registered with the General Dental Council.

Next review due: 12 August 2027