The main objective of root canal therapy is to eliminate infection from the pulp tissue inside the tooth and to preserve the natural tooth structure. This procedure involves removing infected or necrotic pulp, cleaning and disinfecting the root canal system, and then filling it to prevent reinfection. By doing so, root canal therapy prevents the need for tooth extraction, maintains the tooth’s function, and supports surrounding oral structures. This approach is essential for saving the tooth and avoiding complications such as abscess formation or systemic infection.

Reference: Principles and Practice of Endodontics, Mahmoud Torabinejad, 5th Edition.