Cranial Base
|
1.Posterior cranial base (Ar–Ptm) |
Distance between Ar to Ptm. |
2.Anterior cranial base (Ptm–N) |
Distance between Ptm to N. |
Horizontal Skeletal Lines
|
3.Facial convexity (N–A–Pog) |
Angle between N–A and A–Pog |
4.Maxillary protrusion (N–A) |
Distance between point A to Nasion. |
5.Mandibular protrusion (N–B) |
Distance between point B to Nasion. |
6.Chin protrusion (N–Pog) |
Distance between pogonion to Nasion. |
Vertical Skeletal and Dental Lines and Angles
|
7.Upper anterior facial height (N–ANS) |
Distance between Nasion to ANS. |
8.Lower anterior facial height (ANS–Gn) |
Distance between ANS and Gn. |
9.Upper posterior facial height (PNS–N) |
Distance between PNS and HP. |
10.Mandibular plane angle (MP–HP) |
Angle formed between Go–Gn line and HP. |
11.Upper anterior dental height (U1–NF) |
Perpendicular line from the incisal edge of upper incisor to NF |
12.Lower anterior dental height (L1–MP) |
Perpendicular line from the incisal edge of lower incisor to MP. |
13.Lower posterior dental height(L6-MP) |
Perpendicular line from the mesiobuccal cusp tip of lower first molar to MP. |
Maxilla and Mandible
|
14.Maxillary length (PNS-ANS) |
Distance from PNS to ANS, parallel to HP. |
15.Mandibular ramus length (Ar-Go) |
Line from Ar to Go. |
16.Gonial angle (Ar-Go-GN) |
Angle between ramus length and MP. |
17.Mandibular body length (Go-Pog) |
Distance from Go to Pog. |
18.Chin depth(B-Pog) |
Distance between point B and MP through Pog. |
Dental
|
19.Occlusal plane angle (OP-HP) |
Angle from OP and HP |
20.UOP-HP |
Maxillary OP perpendicular to HP |
21.LOP-HP |
Mandibular OP perpendicular to HP |
22.A-B(//OP) |
Two perpendicular lines from points A and B to OP. |
23.Upper incisor inclination(U1-NF) |
Angle between the U1 edge through the tip of the root to NF |
24.Lower incisor inclination(L1-MP) |
Angle between the L1 edge through the tip of the root to MP. |
Facial Form
|
25.Facial convexity(G-SN-Pg) |
An angle between the lines from glabella to subnasal and subnasal to soft tissue pogonion. |
26.MX-Prognathism(G-SN) |
A line perpendicular to horizontal plane from glabella to subnasal. |
27.MD-Prognathism(G-Pg) |
A line perpendicular to horizontal plane from glabella to pogonion. |
28.Vertical height ratio(G-Sn/Sn-Me) |
Distance from G-Sn and Sn-Me. All are perpendicular to HP |
29.L face ht- depth ratio |
Ratio between G-Sn and Sn-Me’ perpendicular to HP. |
30.L face-Throat angle |
Ratio between Sn-Gn and C-Gn. |
Lip Position and Form
|
31.Naso-labial angle |
Angle between columella -Sn and Sn-Ls. |
32.U-lip protrusion |
Distance between Ls and Sn-Pg’ line. |
33.L-lip protrusion |
Distance between Li and Sn-Pg’ line. |
34.Mento labial sulcus |
Perpendicular distance between deepest point on the mentolabial sulcus to Li-Pg’. |
35.Vertical lip- chin ratio |
Ratio between Sn-Stms and Stomion inferius-Me’. |
36.U1 exposure |
Distance between tip of the U1and Stms. |
37.Inter labial gap |
Distance between Stms and Stmi |