Bilateral symmetry and anatomical root variations of mandibular second molars in North Indian populations using cone beam computed tomography.

In 402 CBCT scans, bilateral presence of two roots with three canals was the most typical root structure seen in mandibular second molars (59.11%). A rare variation found was the presence of four roots occurring bilaterally, seen in only 1 CBCT scan. Bilateral symmetrical analysis of root morphology revealed 98.58 % bilateral symmetry. Anatomic root variations, mandibular second molar, Cone Beam Computed Tomography scans, bilateral symmetry.