Figure 2From: Cone-beam computed tomography study of root and canal morphology of mandibular premolars in a western Chinese population Cross-sectional CBCT image of mandibular first premolar with a clearly distinguished C-shaped configuration. Image A illustrates canal shape from the coronal aspect. White arrow denotes root canal in the sagittal plane (B), and the orange arrow denotes the cross-sectional image (C).Back to article page