Prevalence of C-shaped canals and their variations in mandibular first premolars and second molars

Knowledge about the presence and anatomy of c-shaped canals in the root is essential for endodontic treatment. Identification of the presence of a c-shaped canal and its classification might help the clinician to modify the treatment protocol. The aim of this study was to determine the prevalence of c-shaped canals and to evaluate the variations in these canals in mandibular first premolars and second molars. Sixty first premolars and 32 second molars from the mandible were scanned using micro-computed tomography (CT) at a resolution of 50 μm. Transverse sections were obtained from each root and categorized. Alterations in the configurations of the c-shaped canals were noted. The prevalence of c-shaped canals in the mandibular first premolars was 17% and in the mandibular second molars was 16,67%. Alterations in configuration were observed all along the root canal. The dentist should be aware of the presence of c-shaped canals and the possibility of alterations in the shape of these canals while performing endodontic treatment. In cases where a c-shaped root canal is suspected, radiographic examinations should be performed to detect alterations in the configurations so that successful treatment can be provided.