Ceph landmarks Flashcards
Tweed’s Triangle
FMPA
FMIA
IMPA
ANB LOWER than range
-1 below
ANB HIGHER than range
4/5 above
ANB normal range
0-5/0-4
Class I
ANB
A-Nasion-B
Flat Mandibular Plane Angle
Short vertical dimension
Deep bite
ClassIII
Steep Mandibular Plane Angle
Long vertical dimension- Long face syndrome
Anterior open bite: mouth breathing and tongue thrusting habit
Class II
Frankfurt Mandibular Plane Angle normal range
22.3-34.5°
Frankfurt Horizontal Plane + Mandibular Plane
Frankfurt Mandibular Plane Angle
Planes that represent the anterior cranial base
Frankfurt Horizontal Plane
Sella-Nasion Plane - more accurate
Sella to gnathion/pogonion
Y-axis plane
Menton to Gonion forms what plane
Mandibular plane
Nasion to pogonion forms what plane
Facial plane
Nasion to sella forms what plane
Sella-Nasion Plane
Porion to orbitale forms what plane
Frankfurt Horizontal Plane
Point between Pogonion and Menton
Gnathion
Most stable landmark in cephalometric radiograph
Sella
MOST INFERIOR PORTION of the orbit
Orbitale
Innermost point on contour of premaxilla between incisor and ANS
Point A / subspinale
Lowest most posterior point on the mandible with the teeth in occlusion
Gonion (Go)/ angle of the mandible
Most inferior part of mandibular symphysis
Menton (Me)
Most anterior point of the contour of the chin
Pogonion (Pog)
Innermost point on contour of mandible between incisor and bony chin
Point B/ supramentale
The midpoint of SELLA TURCICA (Pituitary gland)
Sella (S)
Most superior margin of the external auditory canal
Porion (Po)
Junction of frontal bone and nasal bone
Nasion
The point of INTERSECTION of the contour of the posterior cranial base and the posterior contour of the condylar process
Articulare (Ar)
Most forward and highest point of the ANTERIOR MARGIN OF FORAMEN MAGNUM
Basion (Ba)
Highest point in the concavity behind the OCCIPITAL CONDYLE
Bolton (Bo)
