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Modern Root Canal Treatment: Myths and Facts

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Myth: Root canal treatment causes pain.

Fact: The inflammation or infection inside the tooth is usually the source of the pain. Treatment is performed with local anesthesia and is designed to remove that source. Most patients report pressure or vibration during treatment and mild temporary tenderness afterward.

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Myth: Root canal treatment removes the root or kills the tooth.

Fact: The roots remain in the jaw. The inflamed or infected pulp is removed from the canal spaces inside the roots. A fully developed tooth can continue functioning because it is supported and nourished by the surrounding tissues.

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Myth: Extraction is always easier and less expensive.

Fact: Extraction may be appropriate for a nonrestorable tooth, but replacement with an implant, bridge, or removable prosthesis can add procedures, healing time, and cost. The comparison must include the complete restorative plan, not only the extraction appointment.

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Myth: Root canals cause cancer or systemic disease.

Fact: Credible scientific evidence does not show that properly performed root canal treatment causes cancer or systemic disease. These claims largely trace back to outdated theories that predate modern microbiology, imaging, anesthesia, and infection-control standards.

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Myth: A treated tooth will inevitably fail.

Fact: Many root canal-treated teeth function for decades. Longevity depends on the original condition, anatomy, fracture status, timely permanent restoration, oral hygiene, decay prevention, and other patient-specific factors. No dental procedure lasts forever in every patient.

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Frequently Asked Questions

How many visits will I need?

Many root canals are completed in one visit. Complex anatomy, active infection, retreatment, or other clinical factors may require more time or an additional appointment.

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How long will I be numb?

The duration varies with the anesthetic and injection site, but numbness commonly lasts for several hours. Avoid chewing and hot foods or drinks until sensation has returned, following the instructions provided at your visit.

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Can I return to work?

Most patients return to work or normal activities the same day—unless the weather is nice or they have other fun stuff they’d rather do.

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Will I need antibiotics?

Antibiotics are not routinely required after root canal treatment. They may be prescribed for selected infections or medical circumstances. If prescribed, take them exactly as directed.

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What if my symptoms return years later?

A previously treated tooth can develop new disease because of decay, restoration leakage, missed anatomy, fracture, or other causes. Retreatment or endodontic surgery may provide another opportunity to retain it.

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Does insurance cover treatment?

Many dental plans provide endodontic benefits, but coverage, deductibles, annual maximums, and network participation vary. Our team will estimate benefits using information supplied by your carrier. Visit our Financial page for details.

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When should I call after treatment?

Call for increasing swelling, severe or worsening pain, a medication reaction, an uneven bite, loss of the temporary filling, or return of the original symptoms. Difficulty breathing or swallowing or rapidly increasing facial or neck swelling requires immediate emergency evaluation.

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Schedule an Evaluation

If you have tooth pain, swelling, a cracked tooth, dental trauma, or questions about a previous root canal, our endodontists can evaluate the problem and explain your treatment options. Same-day emergency appointments are often available.

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South County: (314) 894-5600   |   Festus: (636) 931-4020

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Clinically reviewed by the endodontists of Advanced Endodontics. This information is educational and does not replace an individual examination or diagnosis.