Table 2.

Definition of measurements

	Variable	Definition
Dental	A-P molar differential (mm)	The difference of Mx6 (z) and Md6 (z)
	Midline differential (mm)	The absolute difference of Mx1 (x) and Md1 (x)
	Overbite (mm)	Mx1 (y) minus Md1 (y)
	Overjet (mm)	Mx1 (z) minus Md1 (z)
	Maxillary arch length (mm)	Distance (x, y, z) between Mx6 and Mx1
	Mandibular arch length (mm)	Distance (x, y, z) between Md6 and Mx1
Midface	Palatal plane to the sagittal plane (o)	Angulation (x, z) between ANS-PNS and the sagittal plane
Mandibular	Mandibular length in 3D (mm)	Distance (x, y, z) between CdS and Pg
	Mandibular length in 2D (mm)	Distance (y, z) between CdS and Pg
	Ramus height in 3D (mm)	Distance (x, y, z) between CdS and Go
	Ramus height in 2D (mm)	Distance (y, z) between CdS and Go
	Corpus length in 3D (mm)	Distance (x, y, z) between Go and Pg
	Corpus length in 2D (mm)	Distance (y, z) between Go and Pg
	Gonial angle (o)	Angulation (y, z) between CdS, Go, and Pg
	Mandibular plane angle (o)	Angulation (y, z) between Go-Pg and the Frankfort horizontal
	Ramus inclination to the sagittal plane (o)	Angulation (x, y) between CdL-Go and the sagittal plane
	Dental and chin inclination (o)	Angulation (x, y) between Md1-Me and the sagittal plane
Condylar	Mediolateral diameter of condylar head in 3D (mm)	Distance (x, y, z) between CdL and CdM
	Mediolateral diameter of condylar head in 2D (mm)	Distance (x, y) between CdL and CdM
	Anteroposterior diameter of condylar head in 3D (mm)	Distance (x, y, z) between CdA and CdP
	Anteroposterior diameter of condylar head in 2D (mm)	Distance (y, z) between CdA and CdP
	Superior joint space in 3D (mm)	Distance (x, y, z) between CdS and GlS
	Superior joint space in 2D (mm)	Distance (x, y) between CdS and GlS
	Condylar head inclination to the coronal plane (o)	Angulation (x, z) between CdL-CdM and the coronal plane
	Condylar head inclination to the axial plane (o)	Angulation (x, y) between CdL-CdM and the axial plane