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Cephalometric Points
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Point A
the innermost point on the contour of the premaxilla between anterior nasal spine and the incisor tooth
ANS (anterior nasal spine)
the tip of the anterior nasal spine
- sometimes modified as the point on the upper or lower contour of the spine where it is 3 mm thick
Point B
the innermost point on the contour of the mandible between the incisor tooth and the bony chin
Ba (basion)
the lowest point on the anterior margin of foramen magnum, at the base of the clivus
Gn (gnathion)
the center of the inferior point on the mandibular symphysis
(i.e. the bottom of the chin)
Na (nasion)
the anterior point of the intersection between the nasal and frontal bones
PNS (posterior nasal spine)
the tip of the posterior spine of the palatine bone, at the junction of the hard and soft palates
Bo (Bolton point)
the highest point in the upward curvature of the retrocondylar fossa of the occipital bone
Ar (articular)
the point of intersection between the shadow of the zygomatic arch and the posterior border of the ramus
Po (porion)
the midpoint of the upper contour of the external auditory canal (anatomic porion)
the midpoint of the upper contour of the metal ear rod of the cephalometer (machine porion)
SO (sphenoccipital synchondrosis)
the junction between the occipital and basisphenoid bones (if wide, the upper margin)
S (sella)
the midpoint of the cavity of sella turcica
Ptm (pterygomaxillary fissure)
the point at the base of the fissure where the anterior and posterior walls meet
Or (orbitale)
the lowest point on the inferior margin of the orbit
Pog (pogonion)
the most anterior point on the chin
Me (menton)
the most inferior point on the mandibular symphysis (i.e. the bottom of the chin)
Go (gonion)
the midpoint of the contour connecting the ramus and body of the mandible
Author
adamsnyder
ID
92712
Card Set
Cephalometric Points
Description
ceph definitions
Updated
12/17/2011, 9:23:56 PM
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