Studies show the lack of complete obturation to be the most frequent cause of failure.
While it may be true that what is removed from the tooth is more important than the placement of the filling material, we cannot minimize the importance of obturation, This final phase of endodontics is crucial to the success of the case. In addition, the loops, fins, and accessory openings of the root canal system may initiate or potentiate the endodontic lesion. Finally, iatrogenic causes, such as perforations, ledges and zipped apices must be adequately sealed. Gutta-percha retains its status as the root canal filling material of choice. In order to properly manipulate gutta-percha.