Once root canal therapy is completed, what material is typically used to fill the canal?

Once root canal therapy is completed, gutta percha is the material typically used to fill the canal. Gutta percha is a biocompatible, rubber-like material that is ideal for sealing the empty canal space after the removal of the infected or damaged pulp. Its properties allow it to effectively seal the canal, preventing bacteria from re-entering and minimizing the risk of reinfection. Furthermore, it can be easily compacted, and when combined with sealers, it enhances the sealing ability of the root canal system.

Using other materials for this purpose, such as pulp capping material or composite resin, is not appropriate for root canal filling because they do not possess the necessary properties for long-term sealing and biocompatibility specific to the root canal environment. Similarly, amalgam is primarily used for direct restorations in cavities and is not suitable for filling root canals due to reasons related to sealing ability and the unique conditions of the root canal space. Gutta percha remains the gold standard in endodontics for these reasons, providing both a secure seal and compatibility with the surrounding tissues.