Root canal filling from the root end is a surgical endodontic procedure, also known as retrograde filling, used when standard root canal treatment cannot fully resolve infection in a single-root tooth. The procedure involves accessing the root tip through a small surgical incision, removing infected tissue, and sealing the canal end with a biocompatible filling material.

This technique helps prevent reinfection, promotes healing of surrounding tissues, and preserves the natural tooth. Root-end filling is indicated in cases of persistent apical infection, complex anatomy, or previous unsuccessful endodontic treatment. The procedure is performed with precision to ensure effective sealing, long-term function, and patient comfort.