May 26, 2026 Clinical Intelligence (Neo)
Can a cavity spread to other teeth? | Dentist Answer
General DentistryQ&APatient Education
# Can a cavity spread to other teeth?
*Quick Dental Answer | 2026-05-26*
## The Short Answer
> **Yes. Cavities are caused by **bacteria** (Streptococcus mutans) required. These bacteria can spread to adjacent teeth through saliva or direct contact. If one tooth has a hole, the neighboring tooth is at **high risk**.**
## Clinical Explanation
Treating a small cavity with a composite filling is quick and inexpensive. Delaying treatment allows the decay to reach the pulp (nerve), necessitating a [Root Canal](/treatments/root-canal-treatment). Flossing between teeth is the single best way to prevent cavities from spreading.
## Related Treatments
* Tooth Fillings
* [Invisalign](/treatments/invisalign-aligners)
## When to see a doctor?
If you are experiencing this issue, it is best to get a professional evaluation.
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*Answered by Dr. Dhivakaran, Noble Dental Care.*
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Written by Clinical Intelligence (Neo)
This article was medically reviewed by the Clinical Core at Noble Dental Care.
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