Authors: Erhan Erkan, Keziban Olcay, Tan Fırat EyüboÄŸlu, Elif Sener.
Objectives: Mandibular incisors and canines usually have a single root and canal formation but missed root canals and extraordinary root canal anatomy may cause endodontic failure. The aim was to investigate the prevalence of two root canals or root numbers and root canal shapes by gender in a selected Turkish population.
Materials and Methods: A total of 2823 teeth in 477 patients were evaluated. 939 central mandibular incisors, 947 lateral mandibular incisors, 937 mandibular canine teeth were examined on 578 CBCT scans. The root canal morphologies and cross-sectional shapes of the samples were analyzed.
Results: According to findings, Type I root canal morphology was observed most in all tooth groups (72.58%). The second most common root canal type in the incisors was Type III. Type VII and type VIII were not seen in any group. The incidence of two roots in canines was higher than the incisors. When the cross-sectional designs of the mandibular incisors were evaluated, there was no difference between all the groups (P > .05). Therefore, the most common cross-sectional design at the apical third was round in all groups (99%).
Conclusion The incidence of two root canal formation 26.6% and Type III formation was the most common canal type among the two root canal formations. Two root percentage of two root number in canines was more than incisors. The cross-sectional shape of the incisors was almost completely round at apical third.
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