If your crown and post fell out together, retrieve both pieces immediately and call your dentist for an urgent appointment. The exposed tooth underneath is vulnerable to fracture, decay, and infection, so getting seen within a day or two matters. In the meantime, there are practical steps you can take to protect the tooth and manage discomfort.
What to Do Right Now
First, find the crown and post. Check your mouth, your food, even the floor. You need to bring both pieces to your dentist, because in many cases the same crown can be recemented, saving you time and money. Rinse the crown gently under water and look inside it. You’ll likely see the post still attached. Don’t try to pull them apart.
Call your dentist and explain that the post came out with the crown. This is different from a simple crown popping off a natural tooth, and most dental offices will prioritize the appointment. If it’s after hours or a weekend, look for an emergency dental clinic in your area. Ask the office if they have any specific instructions for your situation while you wait.
Unlike a crown that slips off an intact tooth, you generally should not try to push a post-and-crown unit back into the root canal yourself. The fit is precise, and forcing it risks cracking the root. If your dentist specifically tells you to reinsert it temporarily, follow their instructions. Otherwise, store the pieces in a small container or zip-lock bag so nothing gets lost or damaged.
Managing Pain and Protecting the Tooth
The tooth underneath is a root-treated stump, so it may not hurt as much as you’d expect since the nerve was removed during the original root canal. Still, the exposed area can be sensitive to temperature and pressure. Over-the-counter pain relievers can help with any soreness or gum irritation.
Until your appointment, stick to soft foods and liquids. Avoid anything sticky, hard, or crunchy, and try to chew only on the opposite side of your mouth. Be gentle when brushing near the area. If the exposed stump has sharp edges irritating your tongue or cheek, a small piece of sugar-free gum or dental wax placed over the spot can provide temporary protection.
Why the Post and Crown Came Out
Understanding why this happened helps you have a better conversation with your dentist about what comes next. There are three common reasons a post-retained crown fails.
Cement failure. The adhesive holding the post inside the root canal simply washed out over time. This is the best-case scenario because the tooth and post are usually intact, and the dentist can clean both surfaces and recement the restoration.
Decay around the root. Bacteria can work their way under the crown’s edge over years, softening the tooth structure that the post was anchored into. If enough of the root has decayed, there may not be enough solid tooth left to hold a new post securely.
Root fracture. The post itself can act like a wedge inside the root, especially older screw-type posts. Over time, biting forces concentrate at the tip of the post and can crack the root. A vertical root fracture is one of the few situations where the tooth typically cannot be saved.
One critical factor your dentist will evaluate is called the “ferrule,” which is the band of natural tooth structure that sits above the gum line and wraps around the base of the crown. Research shows that at least 1.5 to 2 millimeters of this natural tooth collar significantly improves fracture resistance and long-term survival. If your tooth originally had very little ferrule, that may explain why the restoration failed.
What Your Dentist Will Check
At your appointment, the dentist will examine the root for cracks, decay, and infection. They’ll likely take an X-ray to see the full length of the root and check the bone around it. They’ll also probe the gums to assess periodontal health. Based on what they find, the options range from straightforward to more involved.
If the root is intact and there’s enough healthy tooth structure remaining, the dentist can often clean the canal, recement the existing post, and either reattach the old crown or make a new one. This is the simplest and least expensive fix.
If the root is cracked or severely decayed, the tooth will likely need extraction. At that point, the conversation shifts to replacement options like a dental implant or a bridge.
What Happens If You Wait Too Long
Delaying treatment by more than a few days introduces real risks. The exposed tooth stump can decay rapidly without the crown’s protection, and bacteria can invade the root canal, potentially causing an abscess. Neighboring teeth may start to shift into the gap, which changes your bite and can make it harder to fit a new crown later. Gum tissue can also grow over the exposed stump, requiring additional treatment before a new restoration can be placed.
Watch for warning signs that things are getting worse: throbbing or sharp pain when biting, sensitivity to hot or cold that lingers, swelling in the gum near the tooth, or pain that intensifies over several days. These can signal infection, which needs prompt treatment.
Cost of Repair vs. Replacement
If the post and crown can be recemented, you’re looking at a relatively minor cost, often just an office visit fee. A new post, core buildup, and crown will run more, but it’s still far less expensive than the alternative.
If the tooth can’t be saved and you need a dental implant, expect to pay between $3,000 and $6,000 for a single implant in the U.S. as of 2025. That price typically includes the implant post, the connector piece, and the new crown. A traditional bridge, which uses neighboring teeth as anchors, is generally less expensive but requires modifying healthy teeth on either side.
How Long Post-and-Crown Restorations Last
No dental restoration lasts forever, but the numbers are encouraging when things are done well. A systematic review of studies with follow-up periods averaging about four years found overall survival rates of around 93% for teeth restored with fiber posts and 78% for those with metal posts. The difference wasn’t statistically significant, but it gives you a reasonable expectation: most post-and-crown restorations last many years, though they do eventually need maintenance or replacement.
Factors that extend the life of a post-and-crown include having adequate ferrule height, avoiding habits like chewing ice or grinding your teeth, and keeping up with regular dental checkups so early signs of cement failure or decay can be caught before the whole thing falls out. If you grind your teeth at night, wearing a night guard protects the restoration from excessive force that can loosen the cement or fracture the root over time.