[Subjectivity in interpretation of radiographs in endodontics]

This research found a substantial interobserver disagreement existing in endodontic success/failure interpretation from periapical radiographs. The diagnostic variability appears to be independent of the anatomic location of the endodontically treated tooth (even though it seems less for mandibular teeth), as well as it appears to be independent of the time interval between post-operative and recall radiographs. Extremely significant has also been the fact that an important percentage of observers have contradict themselves in the interpretation of the same radiograph.