Ceph Bony Landmarks

Question 1

Nasion (N)

Answer 1

Anterior frontonasal suture Seen as notch

Question 2

Sella turcica (S)

Answer 2

Geometric center of bony crypt of pituitary

Question 3

Porion (P)

Answer 3

Most superior point of external auditory meatus

Question 4

Pterygoid Point (Pt)

Answer 4

Foramen Rotundum Upper left pterygomaxillary fissure Template location

Question 5

Orbitale (O)

Answer 5

Lowest point on inferior bony margin orbit

Question 6

Condylion (Co)

Answer 6

Most posterior, superior point on mandibular condyle

Question 7

Basion (Ba)

Answer 7

Most inferior, posterior point on occipital bone Immediately above odontoid process Anterior margin of foramen magnum

Question 8

Anterior Nasal Spine (ANS)

Answer 8

Anterior spinous projection of maxilla

Question 9

Subspinale (A)

Answer 9

A Point Most posterior point on anterior concavity of maxilla between ANS and crest of alveolar process

Question 10

Maxillary Incisor (1) or U1

Answer 10

Find incisal edge and apex Template aligned with long axis-index on edge

Question 11

Mandibular Incisor (1) or L1

Answer 11

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

Question 12

Maxillary Molar (6) or U6

Answer 12

Find occlusal and root Template aligned with long axis Index on occlusal

Question 13

Mandibular Molar (6) or L6

Answer 13

Same as maxillary

Question 14

Supramentale (B)

Answer 14

B Point Most posterior point on concavity of incisive fossa of anterior mandibular symphysis

Question 15

Pogonion (Po)

Answer 15

Most prominent point on anterior of mandibular symphysis

Question 16

Gnathion (Gn)

Answer 16

Most outward, everted point on anterior aspect of symphysis Midpoint between Pogonion and Menton

Question 17

Menton (M)

Answer 17

Most inferior point on symphysis

Question 18

Gonion (Go)

Answer 18

Most outward, everted point on angle of mandible formed by ramus and body

Question 19

Glabella (G)

Answer 19

Most prominent midsagittal point on smooth prominence of forehead between eyebrows

Question 20

Pupil

Answer 20

Opening at center of iris Radiolucent triangle Apex used as measurement point Right angle to facial plane

Question 21

Subnasale

Answer 21

Junction of nose and lip Midpoint of curve Straight edge @ 45degrees

Question 22

Upper Vermillion Border

Answer 22

Most anterior part on margin of upper membranous lip Junction of skin and mucous membrane

Question 23

Stomion

Answer 23

Meeting point of lips If lip incompetence = most inferior point on upper lip

Question 24

Soft Tissue Pogonion

Answer 24

Most anterior point on soft tissue chin Construction (difficult patients) Perpendicular from hard tissue pogonion to subnasale-chin line

Question 25

Soft Tissue Menton

Answer 25

Inferior border of soft tissue chin Difficult to find consistently Located by bisecting angle between: 1). N-Po plane 2). Mandibular plane