| Popis: |
Purpose To evaluate the prevalence and the morphology of C-shaped root canal(s) in mandibular premolars using cone beam computed tomography (CBCT) images. Methods CBCT images of 1095 mandibular premolars were examined at coronal, middle and apical thirds of the root canals. The type, the level, and the position (buccal or lingual) of the C-shaped anatomy were recorded. Absolute counts and percentages of different groups and subgroups of C-shape morphologies were calculated. The differences in mandibular C-shaped premolar prevalences and proportions between location (left and right side) and tooth (first or second premolars) were analyzed (p = 0.05). Results C-shaped root canal morphology was present in 44 teeth. The percentages of C-shaped morphologies were 6.9% and 1.6% in mandibular first and second premolars, respectively. C1 (p = 0.008) and C4b (p = 0.013) were more common in the first premolars at the coronal level, whereas the C2 was significantly prevalent in the second premolars (p = 0.009). No significant differences were observed between 1st and 2nd premolars at the middle and the apical levels (p > 0.05). C4c was significantly frequent on the right premolars at the coronal level (p = 0.038), there were no significant differences between right and left premolars at the middle and the apical levels (p > 0.05). Conclusions The prevalence of C-shaped canal morphology for 1st and 2nd premolars in a Turkish population was consistent with the previous CBCT reports showing a low prevalence. |
