A root canal is a dental procedure that's used to save an infected tooth. Treatment involves removing the tooth's nerve and pulp and then cleaning and sealing the tooth. Symptoms and signs that indicate a root canal is needed include toothache, discoloration, swelling, tenderness, prolonged sensitivity to hot or cold, and a persistent pimple on the gums. Typically, a root canal is no more painful than having a filling placed. Read more: Root Canal Article
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