Can a root canal tooth get a cavity?

Yes. The treated tooth cannot develop a new pulp infection in the same way, but the tooth structure around a crown or filling can still decay.

How long should a root canal last?

With a well-sealed restoration and regular care, a treated tooth can last many years. Individual results depend on the tooth and your oral health.

Can a Root Canal Fail?

Quick answer

Root canal treatment has a strong record of success, but a treated tooth can develop new problems. Learn what can affect long-term results.

What you'll learn

Key facts

What to watch for

Care options

When to call a dentist

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Why problems can return

Complex canal anatomy, a delayed final restoration, a crack, or new decay around an older restoration can allow bacteria to affect a treated tooth again. A new concern does not mean treatment was done incorrectly; teeth and restorations change over time.

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Symptoms to take seriously

New pain when chewing, swelling, a recurring gum bump, or sensitivity around a previously treated tooth are reasons to call your dentist. An exam and X-rays can help identify the cause.

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Protecting your investment

A timely crown or filling when recommended, good daily home care, and regular checkups help protect the tooth. If additional treatment is needed, your dentist will review whether retreatment, surgery, or another option makes sense.