Ceph Bony Landmarks Flashcards
Nasion (N)
Anterior frontonasal suture Seen as notch
Sella turcica (S)
Geometric center of bony crypt of pituitary
Porion (P)
Most superior point of external auditory meatus
Pterygoid Point (Pt)
Foramen Rotundum Upper left pterygomaxillary fissure Template location
Orbitale (O)
Lowest point on inferior bony margin orbit
Condylion (Co)
Most posterior, superior point on mandibular condyle
Basion (Ba)
Most inferior, posterior point on occipital bone Immediately above odontoid process Anterior margin of foramen magnum
Anterior Nasal Spine (ANS)
Anterior spinous projection of maxilla
Subspinale (A)
A Point Most posterior point on anterior concavity of maxilla between ANS and crest of alveolar process
Maxillary Incisor (1) or U1
Find incisal edge and apex Template aligned with long axis-index on edge
Mandibular Incisor (1) or L1
Find incisal edge and apex Template aligned with long axis-index on edge want to know the angulation depth and how far forward they are - has an effect on the smile of the patient
Maxillary Molar (6) or U6
Find occlusal and root Template aligned with long axis Index on occlusal
Mandibular Molar (6) or L6
Same as maxillary
Supramentale (B)
B Point Most posterior point on concavity of incisive fossa of anterior mandibular symphysis
Pogonion (Po)
Most prominent point on anterior of mandibular symphysis
Gnathion (Gn)
Most outward, everted point on anterior aspect of symphysis Midpoint between Pogonion and Menton
Menton (M)
Most inferior point on symphysis
Gonion (Go)
Most outward, everted point on angle of mandible formed by ramus and body
Glabella (G)
Most prominent midsagittal point on smooth prominence of forehead between eyebrows
Pupil
Opening at center of iris Radiolucent triangle Apex used as measurement point Right angle to facial plane
Subnasale
Junction of nose and lip Midpoint of curve Straight edge @ 45degrees
Upper Vermillion Border
Most anterior part on margin of upper membranous lip Junction of skin and mucous membrane
Stomion
Meeting point of lips If lip incompetence = most inferior point on upper lip
Soft Tissue Pogonion
Most anterior point on soft tissue chin Construction (difficult patients) Perpendicular from hard tissue pogonion to subnasale-chin line
Soft Tissue Menton
Inferior border of soft tissue chin Difficult to find consistently Located by bisecting angle between: 1). N-Po plane 2). Mandibular plane
