Is a lost crown or filling always a dental emergency?

Not usually. If there's no significant pain and the tooth is protected, it can typically wait a day or two for a regular appointment. Significant pain or a loose, sensitive tooth is a reason to call sooner instead.

Can I just glue my crown back on myself?

No, avoid household glue or anything not made specifically for dental use, since it can damage the tooth and complicate the actual repair later on. Temporary dental cement from a pharmacy is a much safer short-term option.

Will I need a whole new crown or filling made?

Not always. If the original piece is still intact, it can sometimes be cleaned and re-cemented at your visit rather than remade completely from scratch, which your dentist will assess when you're actually seen.

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lost a crown or filling: what to do until you're seen

By Dr. Aakash Rana, DDS · Updated September 2026 · 4 min read

Short answer: Keep the crown or filling material if you can find it, avoid chewing on that side, and cover the exposed tooth with over-the-counter dental cement or sugar-free gum to protect it until you can be seen. It's rarely a true emergency, but it shouldn't be left unaddressed for long, since the exposed tooth is genuinely vulnerable to decay and breakage in the meantime.

A crown or filling popping out unexpectedly mid-meal is unsettling in the moment but genuinely rarely dangerous on its own right away. The bigger real risk is actually what happens to the exposed tooth underneath it if it's left unprotected for too long a stretch, since that vulnerable surface is doing none of the work it was designed to do. Here's what actually helps in the meantime, before you're able to get in and be seen, and what typically happens once you are.

First, find and keep the piece if you can

If the crown or filling material is still fully intact after coming loose, rinse it off gently with water and hold onto it carefully — in many cases, especially with crowns specifically, Dr. Rana may actually be able to clean it thoroughly and re-cement that exact same piece back into place rather than making an entirely new one from scratch, which genuinely saves both time and an extra fabrication step for you. A small container or a piece of tissue works fine for carrying it safely to your appointment, though avoid wrapping it too tightly in case the piece is more fragile than it looks.

Protect the exposed tooth right away

The tooth sitting underneath a lost crown or filling is often quite sensitive to begin with and considerably more vulnerable to further damage or brand-new decay while it remains exposed to air, food, and temperature changes. Over-the-counter temporary dental cement, sold at most local pharmacies without a prescription, can be applied following the package instructions carefully to cover and protect the tooth until you're actually seen by a dentist in person. Even a small piece of sugar-free gum pressed gently over the area can serve as a stopgap if cement isn't available, though it's a temporary fix rather than a genuine substitute for proper dental cement, and it should genuinely be swapped out for the real thing as soon as you're actually able to get to a nearby pharmacy.

What to avoid doing in the meantime

Avoid chewing on that particular side of your mouth entirely for now, skip very hot, cold, or sugary foods and drinks that can trigger sharp sensitivity in the exposed tooth underneath, and don't try using super glue or anything else not specifically intended for dental use at all — it can genuinely damage the tooth further and considerably complicate the actual repair once you're finally in the chair being treated. Cutting food into smaller pieces temporarily can also help you avoid biting directly on the affected tooth while you wait for your appointment.

Is this a same-day emergency or not?

In most typical cases, a lost crown or filling without any real pain present can wait a day or two for a regular appointment, as long as the tooth stays reasonably protected in the meantime with cement or wax. If there's significant pain, a sharp edge cutting your tongue, or the tooth itself feels loose in its socket, call the emergency line the same day instead of simply waiting it out at home for longer than necessary and hoping it settles down on its own.

Why it shouldn't be ignored for too long

An exposed tooth left unprotected for an extended stretch of time is at meaningfully higher risk of brand-new decay forming underneath it, right where the crown or filling used to seal it off completely from bacteria and food. Sharp or uneven edges left exposed can also damage neighboring teeth over time or irritate your tongue and cheek considerably if the situation simply drags on for weeks without attention or care from a dentist. What starts as a quick, straightforward fix can turn into a considerably more involved and costly repair the longer it's left unaddressed.

What happens at your visit

Dr. Rana will assess carefully whether the original crown or filling can genuinely be reused as-is or truly needs to be replaced entirely, and check the tooth underneath thoroughly for any new decay that needs addressing first before anything else is done. Crowns are milled directly in Prana's own in-house lab on site, which often means a noticeably faster turnaround than sending the work out to an outside lab elsewhere to complete, sometimes within the same visit rather than the weeks a traditional outside lab would otherwise take. Either way, you'll leave with the tooth properly sealed and fully protected once more, rather than left exposed to any further damage.