Dentist Questions Dentist

Can you get a cavity under a crown?

I am a 23 year old male. I will get a crown placed next week. Can you get a cavity under a crown?

8 Answers

Yes, you may absolutely develop caries under a crown, just like you can on a natural tooth or a tooth with a filling in it. The best way to keep restorations lasting long is to brush, floss and limit sticky, sugary foods and drinks.

Yes, it is still possible to get a cavity after having a crown placed. The most common area to get a cavity after getting a crown is at the interface where the crown meets the tooth. The crown is made of a material (metal, porcelain, zirconia, etc.) which does not get decay. However, the area of the tooth right next to the crown is still susceptible to decay and cavities. This is usually where a cavity starts. Hope this helps.

My best to you!

William F. Scott IV, DMD
Yes as the decay can start at the interface of the crown and tooth structure and migrate under the crown
Yes, you can get a cavity anywhere you have natural tooth structure. This includes under a crown, which can be difficult to detect, especially if you've had a root canal! It's best to floss, brush, and rinse regularly. If you have a history of cavities, it's best to be mindful of any foods containing sugar and /or acid (those conditions feed the cavity bacteria).


Dr. Reiser
The edge of the root, where the crown ends, can decay. Careful cleaning at home with brush and floss, and regular visits to your dentist are the best ways to ensure that your crown lasts a very long time.
You have to floss and brush correctly to take care of your new crown. Make sure you are flossing and brushing correctly all of your teeth.
Every day! This will keep your mouth and body healthy.
Yes, you can get a cavity underneath your crown. Crowns have to be treated just like your natural teeth. The plaque bacteria forms on crowns just as it does your natural dentition; that bacteria can lead to the formation of decay.
Yes you can get a cavity under a crown if you do not floss and brush properly.