Dental Care



Read our recent blog posts.

Can You Get A Cavity Under A Crown?

Woman sitting on a couch holding her jaw due to tooth pain.

If you’ve ever had a root canal or other dental crown placement procedure, you might be wondering, Can a crown get a cavity?

While it is possible for a crowned tooth to develop a cavity, it isn’t common. However, it’s important to be able to recognize the signs of tooth decay when it occurs.

Continue reading to learn more about how cavities form underneath dental crowns and how to spot them.

Can You Get A Cavity On A Crown?

Cavities do not develop on dental crowns. This is because crowns, also known as dental caps, are made of materials like resin, porcelain, and metal, which don’t decay. However, the natural tooth underneath is still susceptible.

How Can Crowns Get Cavities?

As discussed above, a cavity won’t develop in the crown itself because the material isn’t vulnerable to decay. However, there is an opening to the natural tooth structure where the crown meets the gum line.

The margins around the edge of the crown need to be precise. The crown shouldn’t overlap the gum tissue, as this can cause inflammation, infection, irritation, and swelling. However, these margins leave a small space for bacteria to potentially sneak under the crown. If there are tiny spaces or imperfections where the crown adheres to the natural tooth, it’s even more likely bacteria will get trapped.

Another way a cavity can develop under a crown is if there was decay present before the tooth was capped. If the decay wasn’t completely removed prior to crown placement, the cavity would only grow larger over time.

Finally, if a tooth is fractured underneath a crown, infection may develop if the injury reaches the root of the tooth.

What Happens If I Get A Cavity Under A Dental Crown?

When bacteria leaks under a dental crown, the natural tooth can develop a cavity. If this occurs, the decay has to be removed to prevent infection. Sometimes, a damaged tooth may require a root canal procedure.

Some signs that indicate there could be decay under a crown include:

  • Tooth Sensitivity
  • Tooth Pain
  • Bad Breath
  • Unusual or Bad Flavor in the Mouth
  • Aching Jaw
  • Swollen Gums
  • A Bump on the Gum Tissue
  • Fever

If you have a cavity under a crown, your dentist may have to remove the crown to clean out the decayed material. However, if the tooth is not infected or broken, your dentist can often fill the cavity without removing the crown. This is accomplished by using small dental tools and X-ray technology.

How to Prevent Cavities Under Crowns

It’s important to receive regular dental check-ups and maintain proper oral hygiene to ensure your teeth stay healthy. This means it’s important to brush and floss every day and clean carefully around restorations.

Sometimes, cavities are inevitable, but taking care of your teeth will go a long way in preventing a dental crown cavity.

Other Signs to Watch For

Usually, teeth with crowns rarely experience problems, including cavities. However, if you notice your crown is loose, chipped, cracked, or your bite feels off, these are warning signs something might be wrong with your crown. Always visit your dentist as soon as possible if you think a dental restoration has been compromised.

Contact Beyond Smiles of Park Ridge

If you’re looking for comprehensive dental care in Park Ridge, IL, contact us today. Our team of dental professionals are highly skilled in crown placement for restorative and cosmetic purposes.

We’re also your source for reliable diagnostics and cavity treatment. If you’re concerned your dental crown is damaged or you’re experiencing cavity symptoms, schedule an appointment with Beyond Smiles of Park Ridge today!

Back to Blog


If you want to make an appointment, call or write to us today!