| Planes and lines |
Skeletal cephalometric measurements |
Mandibular plane Mn: constructed from Go to Me.
Maxillary plane Mx: constructed from ANS to PNS.
SN: line constructed from S to N.
AP: line constructed from A to P.
L1axis: line constructed from Ii to L1apx.
U1axis: line constructed from Is to U1apx.
Ricketts E-plane: line constructed from Prn to soft P. |
SNA: SN to NA angle.
SNB: SN to NB angle.
ANB: NA to NB angle.
Mx.Mn: mandibular plane to maxillary plane angle.
SN.Mn: SN to mandibular plane angle.
Gonial angle: angle between Ar, Go and Me points.
Go-Gn: distance between Go and Gn.
Ar-Go: distance between Ar and Go.
Ar-Gn: distance between Ar and Gn.
ANS-PNS: distance between ANS and PNS.
UAFH (upper anterior face height): distance from N to ANS.
LAFH (lower anterior face height): distance from ANS to Me.
TAFH (total anterior face height): distance from N to Me.
PFH (total posterior face height): distance from S to Go.
Wits appraisal: based on a perpendicular projection of points A and B to the bisecting plane of
Mx.Mn planes angle along which the linear difference between these points is measured. |
| Dentoalveolar cephalometric measurements |
Soft-tissue cephalometric measurements |
U1axis.Mx: angle between U1axis and maxillary plane.
Is-Mx: perpendicular distance between Is and maxillary plane.
U6-Mx: perpendicular distance between U6 and maxillary plane.
L1axis.Mn: angle between L1axis and mandibular plane.
Ii-Mn: perpendicular distance between Ii and mandibular plane.
L6-Mn: perpendicular distance between L6 and mandibular plane.
Ii-AP: perpendicular distance between Ii and AP line.
Overbite: vertical distance between Is and Ii.
Overjet: horizontal distance between Is and Ii.
Interincisal angle: angle between U1axis and L1axis. |
Nasolabial angle: angle between Co, Sn and UL points.
UL- E plane: perpendicular distance between upper lip and E-plane.
LL- E plane: perpendicular distance between lower lip and E-plane. |
