Prevalence and root canal configuration of C-shaped canals in mandibular first and second molars: a retrospective cross-sectional CBCT study in a northern Iranian population
C-shaped canal systems show marked anatomical variation along the root and can complicate cleaning, shaping, and obturation. This study estimated their patient- and tooth-level prevalence and described their cross-sectional configurations in mandibular first and second permanent molars. This retrospective...