Table 4 Sagittal skeletal analysis: sagittal parameters and symmetry values

Strictly sagittal parameters

WITS Index

Distance between point A and B projection on the occlusal plane (mm)

A, B, Pog/McNamara

Distance of points A, B and Pog from the McNamara plane (mm)

Facial Axis Angle

Angle between facial axis plane and the straight line combines points Ba and N (°)

Tweed Mandibular angle

Angle between the mandibular plane and the Frankfurt plane (°)

PFH/AFH

Ratio of posterior facial height to anterior facial height (Na-Me / Po-Go)

Sagittal symmetry values

△ Maxillary Length

Difference in distance between point A and Co (left and right) (mm)

Mean Maxillary Length

Mean of point A—Co (left and right) distances (mm)

△ Mandibular Length

Difference in distance between Gn and Co (left and right) (mm)

Mean Mandibular Length

Mean of Gn-Co (left and right) distances (mm)

△ Md Body Length

Difference in distance between Md Body (left and right) (mm)

Mean Md Body Length

Mean of Md Body (left and right) distances (mm)

△ Gonial Angle

Difference between Gonial Angle (left and right) (°)

Mean Gonial Angle

Mean of Gonial Angle (left and right) angles (°)