Cephalometric for You and Me
|
Cephalometric Parameter |
Norm |
Actual (patient values) |
|
SNA(0) Maxilla relationship to anterior cranial base |
82 81 (±3) |
82 : maxilla is anterior to anterior cranial base |
|
SNB(0) Mandible relationship to anterior cranial base |
80 78 (±3) |
80 : mandible is anterior to anterior cranial base |
|
ANB(0) Skeletal pattern |
2-4 3 (±2) |
2-4 : skeletal class I <2 : skeletal class III 🡪 maxilla backward/ mandible forward >4 : skeletal class II 🡪 maxilla forward/ mandible backward |
|
Go-Gn- SN(0) Divergent face / growth pattern |
32 +/- 4 |
32 : Hyperdivergent/long face –vertical GP |
|
Occlusal plane to SN (0) |
14 |
<13 : maxilla rotated upwards >15 : maxilla rotated downwards |
|
U1-NA 0/mm Inclination of upper incisors |
22/4 |
22 /4 : upper incisors proclined 🡪 Class II div I, bimaxilary protrusion |
|
L1-NB 0/mm Inclination of lower incisors |
25/4 |
<25/4 : lower incisors retroclined 🡪 Class II div 2, class III >25/4 : lower incisors procline 🡪 Class II div 1 |
|
U1-L1 (Interincisal angle)0 |
131 135(±10) |
<131 : upper and lower incisors are proclined 🡪 Class II div 1 >131 : upper and lower incisors are retroclined 🡪 Class II div 2 |
|
Pog –NB (mm) Chin prognathism |
– |
|
|
Wits Appraisal (mm) |
0 for F 1 for M |
<0/1 : class III >0/1 : class II |
|
FMA(0) Indicates growth pattern |
25 |
<25 : horizontal GP >25 : vertical GP |
|
IMPA(0) Indicates upright position of mandibular incisors |
90 |
|
Y-axis(0) Sella gnathion to FH (orbitale to porion) |
53-66 |
<53 : class III cause gnation move forwards, horizontal GP >66 : class II, vertical GP |
|
Upper lip – E plane (mm) E plane (line drawn from nose tip to chin prominence) |
-4 |
|
|
Lower lip – E plane (mm) |
-2 |
|
|
Naso labial angle (0) |
102 |
|
|
MMPA angle between the mandibular plane (Go-Me line) and the maxillary plane (ANS-PNS |
27(±4) |
greater value indicates a longer anterior face height. |
|
U1 – Max |
109(±6) |
|
|
U1 – Mand |
93(±6) |