Table 2 Definitions of the measurement planes

Sagittal projection plane of mandibular ramus (Fig. 3)

In the cranial lateral view, intercept both sides of mandibular ramus separately.

Maximum axial plane of condyle (Fig. 4)

In the joint view, setting the layer to 0.5 mm thickness and 40.0 mm long, define the section of condyle layer at maximum mediolateral diameter.

Midsagittal plane of condyle (Fig. 5a)

the section perpendicular to the maximum axial plane of the condyle and vertically passing through the midpoint of mediolateral diameter.

Midcoronal plane of condyle (Fig. 5b)

the section perpendicular to the maximum axial plane of the condyle and parallel to the maximum mediolateral diameter.