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 |