You’re eating something perfectly ordinary – a bagel, a caramel, a handful of nuts – and suddenly there’s a hard little object in your mouth that isn’t food. Your crown has come off. It’s startling, and the exposed tooth underneath can feel strange, rough, or sensitive.
The reassuring news is that a lost crown usually isn’t a true emergency the way severe pain or swelling is. But it isn’t something to ignore for weeks, either. The tooth underneath has lost its protection, and the longer it’s exposed, the more can go wrong. Here’s how to handle it calmly.
Step one: find and keep the crown
Before anything else, locate the crown and don’t throw it away. If it’s intact, there’s a good chance we can simply clean it and cement it back on – which is faster and cheaper than making a new one. Rinse it gently and put it somewhere safe, like a small container or a plastic bag.
Step two: clean the exposed tooth
Gently brush and rinse the area where the crown was. You’ll probably feel a rough surface or a small “step” – that’s normal; it’s the prepared tooth the crown sits on. It may be sensitive to air and temperature.
Step three: protect it
Until you’re seen, treat that tooth gently. Chew on the other side, and steer clear of very hot, cold, sweet, hard, or sticky foods, all of which can trigger sensitivity or damage the unprotected tooth. If the exposed tooth is sharp against your tongue, a little dental wax from the pharmacy can smooth it over.
Step four: consider temporary cement
Pharmacies sell temporary dental cement made exactly for this situation – it can hold the crown in place for a few days until your appointment. It’s a fine short-term fix. What you must never do is reach for household glue, which brings me to the most important part of this article.
What NOT to do
- Never use superglue or any household adhesive. They’re toxic, they can ruin the crown, and they can damage the tooth underneath so badly it can’t be re-cemented properly. This is the single most common – and most costly – mistake people make with a lost crown.
- Don’t ignore it for weeks. An exposed tooth can decay or shift, and if the tooth moves even slightly, the crown may no longer fit.
- Don’t chew hard foods on that side – the unprotected tooth can crack.
- Don’t force the crown back on if it doesn’t seat easily.
When a lost crown becomes urgent
Call for a same-day appointment, rather than waiting a few days, if you also have severe or throbbing pain, swelling around the tooth or gum, sharp lingering pain to hot or cold, or a tooth that’s broken down close to the gumline. These can mean there’s decay under the crown, an exposed nerve, or an infection that needs prompt care.
Why crowns come off in the first place
It’s rarely random. Usually the cement has simply worn out over years of use, or decay has formed under the crown and changed the fit, or a hard or sticky food pulled it free. When we re-cement or replace a crown, we always check the tooth underneath for decay – because if that’s why it came off, we want to fix the cause, not just stick the crown back on.
The bottom line
Keep the crown, protect the tooth, skip the household glue, and call your dentist to have it properly re-cemented within a few days – sooner if there’s pain. In the Marlborough area, reach us at (508) 290-8714, and we’ll get you sorted.
