thorough understanding of the anatomic and internal morphology of a root canal system is absolutely essential for the success of endodontic treatment. since permanent maxillary first molars have shown variation in internal anatomy, morphology, this tooth has been reviewed extensively. presence of two canals in a two-rooted maxillary first molar has rarely been reported in studies describing too...

UNLABELLED THE MAIN OBJECTIVE of the study was to determine the extent of external apical root resorption at the end of orthodontic treatment and to identify the possible pre-treatment and treatment factors that would allow to predict the possible incidence of root resorption before the start of treatment. PATIENTS AND METHODS Panoramic radiographs of 75 patients that had been treated with fu...