Figure 1.

Panoramic image illustrating the reference lines of the vertical canine location (1) below the level of the cemento-enamel junction of the adjacent lateral incisor, (2) in the cervical third of the adjacent lateral incisor root, (3) in the middle third of the adjacent lateral incisor root, (4) in the apical third of the adjacent lateral incisor root, or (5) above the apical third of the adjacent lateral incisor root as well as the canine angulation measurements (A) to the midline, (B) to the lateral incisor, and (C) to the occlusal plane.