A temporary crown is designed to last two to three weeks, just long enough to protect your tooth while a dental lab fabricates your permanent crown. Some people end up wearing one for six to eight weeks without major issues, but the risks climb steadily the longer it stays in place.
Why Temporary Crowns Have a Short Shelf Life
Temporary crowns are made from softer plastics and resins, not the porcelain or ceramic used for permanent crowns. The most common materials are acrylic resin and a composite called bis-acryl. These are strong enough to handle normal chewing for a few weeks, but they’re not built for the long haul. Fracture is the single most common reason temporary crowns fail, and the material weakens with repeated use over time.
The cement holding a temporary crown in place is also intentionally weak. Your dentist needs to be able to pop the temporary off when your permanent crown arrives, so the adhesive is designed to be removable. That same feature means the seal gradually breaks down, especially when exposed to saliva, chewing forces, and temperature changes day after day.
What Happens If You Keep One Too Long
Wearing a temporary crown beyond its intended lifespan creates several compounding problems. As the cement deteriorates, small gaps open between the crown and your tooth. Bacteria slip into those gaps and can cause gum infection or new decay on the prepared tooth underneath. This is especially damaging because the tooth has already been filed down, leaving its sensitive inner layers exposed.
Your teeth can also shift. A temporary crown doesn’t fit as precisely as a permanent one, and over weeks or months, neighboring teeth may drift slightly. If that happens, your permanent crown may no longer fit correctly when it’s finally placed, potentially requiring the lab to remake it. The longer you wait, the more likely you’ll need additional work and additional cost.
Sensitivity Is Normal at First
Some discomfort and temperature sensitivity right after getting a temporary crown is typical. The tooth underneath has been reshaped, and the temporary doesn’t seal as tightly as a permanent crown will. Hot and cold drinks may trigger brief sharp sensations for the first few days. This usually settles down within a week. If pain worsens instead of improving, or if you feel a throbbing ache that keeps you up at night, contact your dentist, as this can signal nerve irritation or an issue with the fit.
How to Eat Without Dislodging It
The temporary cement holding your crown is the weak link, so your eating habits matter more than you’d think during these few weeks. Chew on the opposite side of your mouth whenever you can, and avoid foods that pull, stick, or crunch against the crown. The biggest offenders include:
- Sticky foods: caramels, taffy, gummy candy, raisins
- Hard foods: nuts, hard peas, raw apples, popcorn kernels
- Small-particle foods: granola, popcorn, seeds, anything that can wedge between the crown and your gumline
Softer foods like pasta, scrambled eggs, cooked vegetables, and yogurt are safe choices. You don’t need to go on a liquid diet, just use common sense about anything that requires aggressive biting or creates a pulling force on the crown.
Flossing Without Pulling the Crown Off
You should still floss around a temporary crown, but with one important change. Slide the floss between your teeth normally, then hug the side of the crown in a C-shape and move the floss gently up and down. When you’re done, pull the floss out sideways toward your cheek instead of snapping it upward. Pulling up can catch the edge of the crown and yank it off. Repeat on the other side of the crown using the same sideways-pull technique.
Brushing is fine with a soft-bristled toothbrush. Just be gentle around the gumline near the temporary, and avoid electric toothbrush heads that vibrate aggressively against the crown’s edges.
What to Do If It Falls Off
If your temporary crown comes loose or pops off, don’t panic. Clean the crown gently, dry it, and try to slide it back over your tooth to check the fit. If it seats properly, you can use over-the-counter dental cement (available at most pharmacies) to hold it in place until you can get to your dentist. A small dab of denture adhesive can work in a pinch as well, though it won’t hold as long.
Don’t use superglue or any household adhesive. These can damage the prepared tooth surface and make it harder for your dentist to place the permanent crown. If the temporary crown is cracked, broken, or lost entirely, call your dental office. Leaving the prepared tooth exposed for more than a day or two invites sensitivity, contamination, and shifting that can complicate the final restoration.