Root canal retreatment may be necessary if the previous endodontic treatment was substandard or performed many years ago, when the necessary techniques and high-quality materials were not available. If the canals are thoroughly cleaned and sealed during endodontic treatment using a microscope and modern biocompatible materials, retreatment of the root canals is usually not necessary.
During endodontic retreatment, the canals where inflammation has occurred are re-cleaned by removing substandard or outdated fillings, disinfected, and tightly sealed.
It is important to remember that, just as after endodontic treatment, the filling placed after root canal retreatment is temporary—after 1–2 weeks, it must be replaced with a permanent filling or a prosthesis.
During the consultation, the patient’s complaints are listened to, the affected tooth is examined, an X-ray or 3D CT scan is taken, and a decision is made as to whether it is appropriate to perform a root canal retreatment.
Before performing root canal treatment, local anesthesia is administered to ensure that the procedure is painless and does not cause any discomfort. To prevent saliva and bacteria, which could cause additional infection, from entering the tooth being treated, it is isolated using a rubber dam before treatment begins.
Using a microscope, ultrasound, and special hand and machine instruments, the old root canal filling is removed, and the infected root canals are thoroughly cleaned.
The cleaned root canals are disinfected and sealed with a filling material.
A recurrence of inflammation or infection in the root canal causes persistent pain in the tooth and surrounding tissues, which can become unbearable.
If left untreated, recurrent inflammation can spread to surrounding tissues and cause further complications, such as abscesses, facial swelling, or even bone damage.
Over time, the structure of a damaged tooth weakens, so that eventually it may become irreparable and have to be extracted. Root canal treatment is usually the last resort for saving a tooth.
An infection from the root canal can enter the bloodstream and cause serious complications.
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