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Emergency Dental Care

Lost Filling or Crown: What to Do Before Your Appointment

A lost restoration exposes sensitive tooth structure. Learn temporary protection strategies and how quickly you need to see your dentist.

D Dr. Scott Bonin
  • Emergency Dentistry
  • Dental Crowns
  • Fillings
Welcoming entry at Bonin Dental Care with the practice logo

A lost or dislodged filling or crown can happen suddenly and often at the most inconvenient time. You might be eating, brushing your teeth, or simply going about your day when you realize something is missing. The immediate result is a tooth that feels exposed and vulnerable. While losing a restoration is not as urgent as a knocked-out tooth or severe abscess, it does need prompt attention from Dr. Bonin. In the meantime, there are steps you can take to protect the tooth and manage discomfort.

Why This Happens

Fillings and crowns fail for a variety of reasons. A filling can come loose if the underlying tooth structure has developed additional decay at the edge, if the filling material has simply worn down over time, or if you have bitten down on something hard. A crown may fall off if the tooth underneath has shifted slightly, if the cement bond has weakened, or if you have bitten on something that loosened it.

Understanding why the restoration failed is important for preventing it from happening again, but first, your goal is temporary protection and comfort.

Immediate Steps

If you have lost a crown, try to locate it. If it is intact and undamaged, save it and bring it with you to your appointment with Dr. Bonin. In many cases, the crown can be reattached with new cement. However, do not attempt to reattach it yourself. The tooth preparation underneath must be clean and dry, and the cement must be applied by a professional.

If you have lost a filling, you probably cannot see the filling material itself, but you will notice a gap or hollow spot in the tooth. The tooth may feel rough or jagged on your tongue. Some people experience sharp discomfort immediately, while others notice only mild sensitivity.

With either a lost filling or crown, the exposed tooth structure is more sensitive to temperature, air, and pressure. Avoid very hot or very cold foods and drinks, as these can intensify pain. Stick to room-temperature or lukewarm soft foods.

Temporary Protection

For a lost filling, you can purchase temporary filling material at most drugstores. These products are designed for exactly this situation and are safe for short-term use. Clean and dry the area as much as possible, then follow the instructions on the product to place the temporary filling. This is not a permanent solution and will likely fall out on its own, but it provides protection until you can see Dr. Bonin.

For a lost crown, if it is intact and you have saved it, you might be able to temporarily hold it in place by biting gently on it, similar to how you might reposition a loose tooth with your tongue. However, this is not reliable and not recommended. A better temporary option is to place dental wax or sugar-free gum around the exposed tooth to provide some protection from temperature and air. Again, this is temporary and cosmetically imperfect, but it helps until your appointment.

Do not use super glue, regular adhesive, or any permanent adhesive on your crown. If you do, removing it later becomes much more difficult and can damage the tooth underneath.

Pain Management

Over-the-counter pain relievers can help if the exposed tooth is sensitive or uncomfortable. Ibuprofen reduces inflammation, which is often the source of pain around a lost filling or crown. Topical numbing gels designed for dental use can also provide temporary relief.

Avoid chewing on the side of the mouth with the lost restoration. Chewing increases pressure on the exposed tooth and can worsen pain or cause additional damage.

How Quickly You Need to See a Dentist

A lost filling should be addressed within a day or two if possible. The longer the tooth remains unprotected, the greater the risk of additional decay developing at the edges of the tooth where the filling was. New decay can penetrate deeper into the tooth, requiring more extensive treatment.

A lost crown is a bit more flexible in terms of timing, but you should still aim to see Dr. Bonin within a few days. The tooth under a crown is often weakened, either because it has had previous decay and treatment or because the tooth was prepared for the crown. Without the protective crown, this tooth is vulnerable to new damage.

If you cannot get an appointment with Dr. Bonin within a day or two, look for an emergency dentistry provider to at least protect the tooth temporarily. Better to have a temporary filling or reattachment than to risk developing a new problem.

What Dr. Bonin Will Do

When you come in for your appointment, Dr. Bonin will examine the tooth and take X-rays to check for new decay or damage. For a lost filling, we will remove any remaining old filling material and any decay, then place a new filling if the damage is small enough. If the damage is extensive, we may recommend a crown for better long-term protection.

For a lost crown, if the crown is still in good condition, we will clean the tooth underneath and reattach the crown with new cement. If the crown is cracked, broken, or if the tooth underneath has changed shape or developed new decay, we will need to prepare a new crown, which takes longer and requires a temporary crown during the interim.

Prevention

To reduce the risk of losing a restoration, avoid chewing on very hard objects like ice, nuts in shells, or hard candy. Be gentle with your teeth, especially if you have a crown; a crown is strong, but the tooth underneath is not. If you grind your teeth at night, a mouthguard can protect your restorations from damage.

If your crown or filling comes loose or feels unstable, contact Bonin Dental Care right away rather than waiting for it to fall out completely. Sometimes a loose restoration can be tightened or reattached before it is lost, which is easier than dealing with a completely missing restoration.

Losing a restoration is inconvenient, but it is manageable with prompt action and temporary protection. Contact Dr. Bonin at Bonin Dental Care as soon as you notice a missing filling or crown, and we will get your tooth back to full function as quickly as possible.

Learn more about the author Dr. Scott Bonin

Written by

Dr. Scott Bonin, DDS

General and cosmetic dentist at Bonin Dental Care in Windsor, California. USC School of Dentistry graduate, Navy veteran, and member of the American Dental Association, California Dental Association, and American Academy of Cosmetic Dentistry. Over 24 years of clinical experience serving Sonoma County families.

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Clinical note: This article is for educational purposes and does not replace a professional examination. Every patient's situation is unique. If you have questions about your specific dental health, please schedule an appointment or call (707) 838-1400.