The purpose of obturation in root canal therapy is to:

The purpose of obturation in root canal therapy is to seal the canal from contamination. This step is crucial because once the inner part of the tooth is cleaned and shaped, it becomes important to fill and seal the space to prevent any future bacterial infection or recontamination from saliva or other sources. Obturation involves using materials that create a tight seal, ensuring that no bacteria can enter the canal system after the procedure is completed.

By effectively sealing the canal, obturation helps to maintain the health of the surrounding tissues and contributes to the long-term success of the root canal treatment. This is particularly essential for preserving the tooth and preventing further complications, such as abscesses or the need for extraction.