Inside the tooth is a soft tissue containing blood vessels and nerve extensions called the pulp. When the pulp is damaged and inflamed due to reasons such as decay or trauma, root canal treatment is necessary. The root canals are tiny, narrow tunnels that extend from the crown of the tooth down to the tip of the root. Root canal treatment involves removing the pulp from these tunnels and filling them with dental materials. The purpose of filling the root canals is to create a barrier against microorganisms and tissue fluids. This allows the tooth to remain functional in the mouth even though it is no longer living.

The main reason for requiring root canal treatment is deep and extensive decay that reaches the pulp. When the pulp is damaged and inflamed, it cannot heal on its own and dies. Bacteria then reach the pulp, causing inflammation. This can result in sensitivity and pain from chewing, pressure, or temperature changes (hot or cold). Pulp inflammation can also cause spontaneous pain that cannot be relieved with painkillers.
In such cases, root canal treatment is necessary. If pulp inflammation is not treated, abscesses—pockets filled with pus—can form at the root tips and in the jawbone. These abscesses can expand and cause destruction of the surrounding bone tissue. Untreated inflamed pulp leads to pain and swelling, and if left untreated for a long time, the tooth may ultimately need to be extracted.
There is no alternative treatment to root canal therapy. In cases where a root canal fails or cannot be performed a second time, a surgical procedure called apical resection can be performed, which involves cutting and sealing the tip of the tooth root. If these procedures also fail, tooth extraction may be necessary. The resulting gap from the extraction can then be treated with a bridge or dental implant.
Root canal treatment requires patience and dedication from both the dentist and the patient. Before the procedure, anesthesia is applied to the tooth and surrounding area. This numbness ensures that the patient feels no pain during the treatment. After the procedure, mild pain and sensitivity in the tooth may occur, but this is temporary. The best approach is to avoid using that side of the mouth for a few days or to take an anti-inflammatory medication. Sensitivity typically subsides shortly afterward.
The duration of a root canal treatment varies depending on the condition of the tooth, but it is usually completed in two or three sessions. However, in infected teeth, this period may be longer. In cases of severe infection, the dentist may also recommend taking medication orally.
After treatment, mild pain and sensitivity in the tooth may occur, but this is temporary. The best approach is to avoid using that side of the mouth for a few days. Sensitivity usually disappears shortly afterward.
A tooth that has undergone root canal treatment can last for many years, just like a natural tooth. However, root canal-treated teeth can still develop decay, fractures, or gum problems. Maintaining oral hygiene is essential after root canal treatment. It is recommended to brush your teeth regularly, use dental floss, and visit your dentist for check-ups every six months.