Figure 2.

Schematic illustration of the method used for measuring a tooth in a coronal CBCT image: (A) The line M–D represents the maximum mesiodistal dimension of the tooth crown; M–M1indicates the mesial enamel layer; D–D1 indicates the distal enamel layer; and M1–D1 shows the distance between the mesial and distal dentino–enamel junctions or thickness of dentine. (B) The blue spot represents the maximum enamel density between the dentino–enamel junction and the outer enamel surface at any point on the measured enamel thickness; M–M1 denotes the mesial enamel density; and D–D1 denotes the distal enamel density.