Measurement (unit) | Description |
---|---|
Maxilla/midface | |
SNA (°) | Sagittal position of maxilla |
ANS-PNS (mm) | Maxillary length |
Co-ANS (mm) | Length condylion to ANS |
N/S^ANS/PNS (°) | Palatal plane angle |
Ba-S-N (°) | Saddle angle |
S-N (mm) | Anterior cranial base length |
S-Ba (mm) | Posterior cranial base length |
Ba-A (mm) | Length basion to A point |
Ba-N-A (°) | angle formed from basion to nasion to A point |
FH^N/A (°) | Maxillary depth angle |
PNS-Ba (mm) | PNS to basion |
A-N true vertical (mm) | Length of A to N, sagittal position of the maxilla |
OP^FH (°) | Angle formed by occlusal plane to FH |
OP^SN (°) | Angle formed by occlusal plane and sella-nasion |
Mandible | |
SNB (°) | Sagittal position of mandible |
Ba-B (mm) | Length basion to B point |
Ba-N-B (°) | Angle formed from basion-nasion-B point |
FH-N-Po (°) | Mandibular depth angle |
Co-Go-Gn (°) | Gonial angle |
Co-Go (mm) | Mandibular length |
S-Go (mm) | Length from condylion to pogonion |
Co-Pg (mm) | Length from sella to gonion |
S/N^Go/Gn (°) | Angle form by the gonion/gnathion and nasion/sella |
B-N true vertical (mm) | B to N True vertical |
Pg-N true vertical (mm) | Pogonion to N True vertical |
Y-axis length (mm) | Length Sella to Gnathion |
Y-axis angle (°) | Angle formed from ST G and sella-nasion |
Inter-maxillary relationship | |
ANB (°) | A-N-B angle |
Wits appraisal (mm) | Length along the occlusal plane from perpendicular points to A and B |
Co-Pog-Co-ANS (mm) | Harvold analysis |
Facial height | |
TFH (N-Me) (mm) | Total facial height; distance from nasion to menton |
UFH (N-ANS) (mm) | Upper facial height; distance from nasion to ANS |
LFH (ANS-Me) (mm) | Lower face height; distance from ANS to menton |
LFH/TFH (%) | Lower face height to total face height ratio |
PFH (S-Go) (mm) | Posterior facial height; distance from S-Go |
AFH (N-Pg) (mm) | Anterior facial height, distance from N to Pg |
PFH/AFH (%) | Ratio of the posterior facial height and anterior facial height |
Hyoid | |
MP-H (mm) | Length of hyoid from line perpendicular to the mandibular plan (Go-Me) |
H-Rg (mm) | Length of hyoid to retrognathion |
H-C3 (mm) | Length of hyoid to C3 |
H-C3-Rg (mm) | Length of hyoid from line perpendicular to C3 to retrognathion |
H-Me-Go/Me (°) | Angle formed from hyoid, menton, and gonion |
H-S (mm) | Distance from hyoid to sella |
C2 - H FH perp (mm) | Length of C2-hyoid to the horizontal aspect to FH |
C2 - H || FH (mm) | Length of C2-hyoid in the vertical aspect to FH |
C3 - H FH perp (mm) | Length of C3-hyoid to the horizontal aspect to FH |
C3 - H || FH (mm) | Length of C3-hyoid in the vertical aspect to FH |
C4 - H FH perp (mm) | Length of C4-hyoid to the horizontal aspect to FH |
C4 - H || FH (mm) | Length of C4-hyoid in the vertical aspect to FH |
Airway | |
Airway at A point (mm) | Pharyngeal airway length at A point |
Airway at Mx1 level (mm) | Pharyngeal airway length along the occlusal plane |
Airway at B point (mm) | Pharyngeal airway length at B point |
Airway at Pog level (mm) | Pharyngeal airway length at the level of the pogonion |
Palate | |
ANS/PNS^Me/Go (°) | Angle of palate to mandibular plane |
SPS-SPI (mm) | Thickness of soft palate |
Dental/soft tissue profile | |
Mx1-Mx OP (°) | Upper incisor inclination |
Mx1-Sn (mm) | Upper incisor tip projection |
Md1-Md OP (°) | lower incisor inclination |
Md1-Sn (mm) | lower incisor tip projection |
Overjet (mm) | Overjet (measurement of U1T to L1T in the horizontal direction) |
Overbite (mm) | Overbite (measurement of U1T to L1T in the vertical direction) |
Maxillary anterior height (mm) | Subnasale, U1 tip perpendicular to TVL |
Sub-Gl (mm) | Subnasale to soft glabella to TVL |
STA-TVL (A') (mm) | Soft tissue point A length to TVL |
STB-TVL (B') (mm) | Soft Tissue point B length to TVL |
STP-TVL (mm) | Soft tissue pogonion length to TVL |
STP-THR (mm) | Soft tissue pogonion to throat point |