Table 2 Definition of measurements
From: Quantification of skeletal asymmetries in normal adolescents: cone-beam computed tomography analysis
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 |