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Which dental specialty treats diseases inside a tooth?

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The dental specialty that treats diseases inside a tooth is called endodontics.12

Endodontists focus on the diagnosis, treatment, and prevention of conditions affecting the dental pulp—the soft tissue located in the center of the tooth that contains nerves and blood vessels—as well as the pulp chamber, pulp canal, and contiguous structures. A primary procedure performed within this specialty is root canal therapy, which involves removing diseased pulp and replacing it with filling material to preserve the natural tooth.123