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If a filling or crown just came loose or fell out entirely, here's the direct answer: rinse the area gently, protect the exposed tooth with over-the-counter dental cement or a small piece of sugar-free gum, use a dab of clove oil for pain if needed, avoid chewing on that side, and call an emergency dentist in Palo Alto within 24 to 48 hours, sooner if you're in real pain. What you do in the next few hours matters less than what you avoid doing, so start there. Quick Answer: Save the piece if you have it, keep the area clean, use temporary dental cement or clove oil for comfort, and never use super glue, then get to a dentist as soon as you reasonably can. Why This Isn't (Usually) a True Emergency — But Isn't Nothing Either Losing a filling or crown exposes the softer, more sensitive layer of tooth underneath, which is why it can suddenly feel painful even if the tooth itself isn't in immediate danger. Bryant St. Dental's guide to common dental emergencies covers this alongside more urgent situations like a knocked-out tooth — the difference is timing, not whether you should take it seriously. Left unprotected for too long, the exposed tooth is more vulnerable to further damage, and neighboring teeth can gradually shift into the gap where a crown once sat. What to Do Right Now Find the piece, if you can. Rinse it gently with cool water — don't scrub it — and bring it with you to your appointment. A dentist may be able to re-cement an intact crown rather than making a new one. Protect the exposed tooth. Over-the-counter dental cement (sold at most pharmacies) can temporarily hold a loose crown in place or seal a lost filling. If you don't have any on hand, a small piece of sugar-free gum pressed gently into the space works as a stopgap — avoid sugared gum, which feeds the bacteria already exposed at the site. Manage discomfort. A small amount of clove oil dabbed onto the sensitive area with a cotton swab has a mild, temporary numbing effect. Over-the-counter pain relievers and a cold compress on the outside of the cheek can help with any swelling or soreness. Avoid chewing on that side. The exposed tooth structure is weaker without its filling or crown, and biting down on it — especially on anything hard or sticky — risks cracking it further. Call your dentist. Even without pain, an exposed tooth needs professional attention. Most offices can see you within a day or two for something like this. What Not to Do Don't reach for super glue or other household adhesives. They're not designed for use in the mouth, can be toxic if swallowed, and can make it harder for your dentist to properly re-cement the crown later. Don't ignore it because it doesn't hurt. A missing filling or crown still exposes the tooth to decay and damage even when there's no pain yet. Don't wait through the weekend hoping it settles down on its own. It won't — the tooth will still be exposed on Monday, and by then it may hurt more. When to Treat It as More Urgent Most lost fillings and crowns can comfortably wait a day or two for a regular appointment. Call sooner, or seek same-day emergency dental care, if you notice: Severe or throbbing pain that over-the-counter medication doesn't touch Visible swelling in the gum, cheek, or jaw Fever alongside tooth pain (a possible sign of infection) Difficulty biting down, swallowing, or opening your mouth fully If you develop facial swelling along with a fever, or any difficulty breathing or swallowing, treat that as a medical emergency and seek immediate care rather than waiting for a dental appointment. What Happens at Your Appointment For a lost filling, your dentist will remove any remaining decay and place a new filling—usually a straightforward, single-visit fix. For a lost crown, if the crown itself is undamaged, your dentist may be able to clean it and re-cement it back in place the same day. If it's cracked or if decay has changed the shape of the tooth underneath, you'll likely need a new crown, typically a two-visit process with a temporary crown in place while the permanent one is fabricated. Frequently Asked Questions