Cephalometric Points

the innermost point on the contour of the premaxilla between anterior nasal spine and the incisor tooth

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

the innermost point on the contour of the mandible between the incisor tooth and the bony chin

the lowest point on the anterior margin of foramen magnum, at the base of the clivus

the center of the inferior point on the mandibular symphysis

(i.e. the bottom of the chin)

the anterior point of the intersection between the nasal and frontal bones

the tip of the posterior spine of the palatine bone, at the junction of the hard and soft palates

the highest point in the upward curvature of the retrocondylar fossa of the occipital bone

the point of intersection between the shadow of the zygomatic arch and the posterior border of the ramus

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)

the junction between the occipital and basisphenoid bones (if wide, the upper margin)

the midpoint of the cavity of sella turcica

the point at the base of the fissure where the anterior and posterior walls meet

the lowest point on the inferior margin of the orbit

the most anterior point on the chin

the most inferior point on the mandibular symphysis (i.e. the bottom of the chin)

the midpoint of the contour connecting the ramus and body of the mandible