The most common causes of endodontic failure

Endodontic treatment continues to focus on chemomechanical preparation and the removal of diseased tissues in order to eradicate bacteria and avoid subsequent pathologies. In addition to creating space for obturation, mechanical preparation of the canals also makes it easier to sanitize the root canal system using irrigation solutions. The presence of iatrogenic errors occurring during treatment, such as missed diagnosis, poor access cavity shape, coronal leakage, improper mechanical debridement or irrigation, untreated canals, perforations, separated instruments, poor canal obturation, and persistence of bacteria, are all linked to less effective endodontic outcome and clinical failure. Even though endodontic treatment has a high success rate, failures do happen frequently and are typically caused by the aforementioned factors.