If you just felt something hard and porcelain rattle around in your mouth during lunch, you're likely frantically searching for how to stick tooth cap at home until you can get into a dentist's chair. It's a classic "Friday night at 6 PM" problem—everything's closed, you've got a gap in your smile, and your tooth feels weirdly sensitive to the air. The good news is that you aren't stuck with a hole in your grin for the whole weekend, but you do need to be careful about how you handle it.
First things first: breathe. Losing a crown is a very common dental "oopsie." Whether the cement just got old or you bit down on a particularly stubborn piece of sourdough, it happens to the best of us. This isn't a permanent DIY project, though. Think of this more like a roadside tire change; it gets you to the shop, but you aren't meant to drive on it forever.
The most important rule: Put down the Super Glue
Before we get into what you should do, we have to talk about the one thing you absolutely should not do. Do not, under any circumstances, reach for Super Glue, Krazy Glue, or any household adhesive from the junk drawer.
It's tempting, I know. It's right there, it's strong, and it seems like a quick fix. But household glues are incredibly toxic to your mouth and the delicate pulp inside your tooth. Even worse, if you glue that cap back on slightly crooked with permanent industrial glue, your dentist might have to break the cap—or worse, damage your tooth—to get it back off. Stick to products designed for human mouths. Your future self (and your wallet) will thank you.
Get everything ready for the fix
Before you try to put it back in, you need to assess the situation. Grab a mirror and a flashlight. Take a look at the tooth that's still in your mouth. Is it broken? Is there a big chunk of the tooth still inside the cap?
If the tooth itself looks like it snapped off at the gum line, you probably won't be able to stick the cap back on at home. There simply isn't enough "stump" left for the cap to grip onto. In that case, just keep the area clean and wait for the dentist. But if the tooth looks relatively intact and just looks like a smaller, shrunken version of a regular tooth, you're in business for a temporary fix.
Clean the cap thoroughly
You'll notice some old, crusty white stuff inside the tooth cap. That's the old cement. You want to gently scrape out as much of that as possible. A toothpick or a clean needle works well for this. You don't need to be aggressive—just get the big chunks out so the cap can sit flush against your tooth. Once it's scraped, give it a good scrub with a toothbrush and some water, then let it dry.
Prep your mouth
Your natural tooth needs to be as clean and dry as possible for the temporary glue to work. Brush gently to remove any food debris. Right before you're ready to "glue" it, use a cotton swab or a piece of gauze to pat the tooth dry. Saliva is the enemy of dental cement; if the area is soaking wet, the cap is just going to slide right back off.
What to use to stick the tooth cap back on
Since we've already ruled out the toolbox glues, what are your actual options? You can find what you need at pretty much any 24-hour pharmacy or even some large grocery stores.
Temporary dental cement
This is the gold standard for home fixes. Brands like Temparin or Dentemp are specifically made for this exact emergency. It usually comes in a little vial or a tube. It's a zinc oxide-based material that's safe for your mouth and easy for a dentist to remove later. It's not incredibly strong, but it'll do the job for a few days.
Denture adhesive
If you can't find a repair kit, denture adhesive (like Fixodent) is a decent backup. It's not really a "cement," so it won't hold as firmly, but it's enough to keep the cap in place so you don't accidentally swallow it or feel embarrassed during a Zoom call. It's also very easy to clean off once you finally get to your appointment.
Toothpaste (The "I have nothing else" option)
If it's 3 AM and you're desperate, a little bit of thick toothpaste can act as a very temporary "suction" aid to hold the cap on. This won't let you eat anything, but it might keep the cap in place while you sleep so you don't inhale it.
The step-by-step process
Now that you have your supplies, here is the actual method for how to stick tooth cap at home.
- Dry fit first: Put the clean, dry cap back on your tooth without any glue. Make sure you know exactly which way it faces and how it feels when it's seated correctly. Bite down gently. Does it feel "high" or "wonky"? If so, adjust it until it feels like your normal bite.
- Apply the cement: If you're using a kit, follow the mixing instructions (some are pre-mixed). Put a small amount of the cement inside the cap. You don't need to fill the whole thing—just a thin layer around the inner rim and a bit in the center.
- Place the cap: Line it up and push it firmly onto your tooth.
- Bite down gently: Close your mouth slowly and make sure the cap is seated perfectly. Don't bite too hard, or you might crack the temporary cement before it sets.
- Clean the squeeze-out: Some cement will probably ooze out from the edges. Use a toothpick or a wet cotton swab to wipe that away before it hardens.
- Let it set: Most dental cements need about 30 to 60 minutes to really firm up. Don't talk too much, and definitely don't eat during this window.
How to live with a temporary fix
Even if you did a stellar job and the cap feels solid, remember: it's a temporary patch. You can't go back to eating jawbreakers or sticky taffy just yet.
Watch what you eat. Stick to soft foods. Think mashed potatoes, yogurt, or soup. Avoid anything crunchy, chewy, or particularly hard. Also, try to chew on the opposite side of your mouth. Even if the cap feels "stuck," the temporary cement is brittle and can snap under pressure.
Keep it clean, but be gentle. You still need to brush, but don't go at that specific tooth with an electric toothbrush on the highest setting. Gently hand-brush the area. When you floss, do not pull the floss back up between the teeth. Instead, slide it through the gap and then pull it out sideways through the side of the tooth. Pulling upward is the fastest way to pop your newly-stuck cap right back off.
When to see the dentist
I know, nobody loves a trip to the dentist, but this isn't optional. Even if the cap feels perfect, there's a reason it fell off. Maybe there's a tiny bit of new decay underneath that changed the shape of the tooth, or maybe the original cement just reached its expiration date.
If you leave a DIY-glued cap on for weeks, you're asking for trouble. Bacteria can get trapped under the cap, and since your home-job isn't a perfect hermetic seal, you could end up with a massive cavity or an infection in the root. Most dentists will try to squeeze you in for a "recement" appointment pretty quickly because it only takes them about ten minutes to fix it properly.
What if you can't get it to stay?
Sometimes, the cap just won't stay on no matter how much Dentemp you use. If the tooth underneath is sensitive to cold or air, you can actually use a little bit of that same dental cement to cover the "stump" of the tooth directly. It'll act like a little bandage to keep the nerves from being irritated until you can get professional help. Just keep the cap in a safe place (like a pill bottle or a plastic baggie) and bring it with you to your appointment.
Learning how to stick tooth cap at home is a great skill for those annoying dental "emergencies," but just treat it as a bridge to get you to the professional fix. Stay calm, avoid the Super Glue, and get that appointment booked as soon as the office opens!