Figure 1 Representation of root canal classifications on axial view of CBCT. (A1–A3) Presence of single canals in the coronal, middle, and apical thirds indicated by arrows, classified as Vertucci Type I and 1TN1 Ahmed. (B1, B2) Two canals in the coronal and middle third. (B3) Only 1 canal in the apical third, indicated by arrows, classified as Type II Vertucci and 1TN2-1 Ahmed. (C1) One canal in the coronal third. (C2) Two canals in the middle third. (C3) One canal in the apical third indicated by arrows, classified as Type III Vertucci and 1TN1-2-1 Ahmed. (D1–D3) Two canals in the coronal, middle, and apical thirds indicated by arrows, classified as Type IV Vertucci and 2TNB1P1 Ahmed. (E1) One canal in the coronal third. (E2, E3) Two canals in the middle and apical third indicated by arrows, classified as Type V Vertucci and 1TN1-2 Ahmed. (F1) Two canals buccal and palatal in coronal third. (F2, F3) Two canals in buccal and 1 canal in palatal root in middle and apical thirds, indicated by arrows, classified as 2TNB1-2P1 according to Ahmed and Type XVI according to Sert and Bayirli. (G1–G3) Three canals in coronal, middle, and apical third indicated by arrows, classified as Type VIII Vertucci and 3TNMB1DB1P1Ahmed.