What Is a Root Canal?

A root canal (technically called endodontic therapy) is a dental procedure used to treat infection or severe damage inside a tooth. Every tooth has a soft inner core called the pulp, which contains nerves, blood vessels, and connective tissue. When bacteria reach the pulp — through deep decay, a crack, or repeated dental procedures — infection sets in, causing significant pain and potential tooth loss if left untreated.

The root canal procedure removes this infected or damaged pulp, cleans and shapes the inner canals, and seals the tooth to prevent reinfection. The tooth is then typically restored with a crown.

Signs You May Need a Root Canal

  • Severe, persistent toothache — especially when biting or applying pressure
  • Prolonged sensitivity to hot or cold that lingers after the source is removed
  • Darkening or discoloration of a tooth
  • Swelling or tenderness in nearby gums
  • A persistent pimple-like bump (abscess) on the gums

However, some infected teeth show no symptoms at all — which is another reason regular X-rays and checkups are so important.

Step-by-Step: What Happens During the Procedure

  1. X-rays and diagnosis: Your dentist or endodontist takes X-rays to assess the extent of infection and the shape of the root canals.
  2. Local anesthesia: The area is numbed thoroughly. Most patients report that the injection is the most uncomfortable part — and even that is brief.
  3. Dental dam placement: A small rubber sheet isolates the tooth to keep it clean and dry.
  4. Access opening: A small hole is drilled through the crown of the tooth to reach the pulp chamber.
  5. Pulp removal: Tiny instruments are used to remove the infected pulp and clean the canals.
  6. Shaping and irrigation: The canals are shaped and flushed with an antibacterial solution.
  7. Filling: The cleaned canals are filled with a rubber-like material called gutta-percha and sealed.
  8. Restoration: A temporary filling is placed, followed later by a permanent crown to protect the tooth.

Does a Root Canal Hurt?

This is the most common concern — and the good news is that modern root canal treatment is performed under local anesthesia and is no more uncomfortable than getting a routine filling. The procedure actually relieves the pain caused by the infection. Most patients are pleasantly surprised by how manageable it is.

After the procedure, some mild soreness for a few days is normal and manageable with over-the-counter pain relievers. Avoid chewing on that side until the permanent crown is placed.

Root Canal vs. Tooth Extraction: Which Is Better?

When faced with a severely damaged tooth, patients sometimes wonder whether extraction is simpler. In most cases, saving the natural tooth is the preferred option because:

  • Natural teeth function better than any artificial replacement
  • Extraction leads to bone loss in the jaw over time
  • Replacing a missing tooth with an implant or bridge typically costs more than a root canal and crown
  • Adjacent teeth can shift when a gap is left

Recovery Tips

  • Avoid hard or chewy foods on the treated side until crowned
  • Take any prescribed antibiotics for the full course
  • Continue brushing and flossing normally around the area
  • Contact your dentist if pain increases after a few days rather than improving

How Long Does a Root Canal Last?

With proper restoration (usually a crown) and good oral hygiene, a root canal-treated tooth can last a lifetime. The key is getting the crown placed promptly after the procedure and attending regular dental checkups.