Cephalomentric pints

• The centre of the sella

  turcica?

  Sella (S)
• The lowest point on the infraorbital margin.?

  Orbitale (Or)
• The most anterior point on

  the frontonasal suture?

  Nasion (N)
• The tip of the anterior nasal spine?


  Anterior nasal spine (ANS).
• The deepest midline point

  between the anterior nasal

  spine and prosthion?

  Subspinale or point A.
• The most anterior point of the alveolar crest in the maxilla, usually between the upper central incisors?

  Prosthion (Pr).
• The most anterior point of

  the alveolar crest, situated between the lower central incisors?

  Infradentale (Id).
• The deepest point in the

  bony outline between the infradentale and the pogonion?

  Supramentale or point B.
• The most anterior point of

  the bony chin?

  Pogonion (Pog)
• The most anterior and inferior point on the bony outline of the chin, situated equidistant from pogonion and menton?

  Gnathion(Gn).
• The lowest point on the bony outline of the

  mandibular symphysis?

  Menton (Me).
• The most lateral external point at the junction of the horizontal and ascending rami of the mandible?

  Gonion (Go)
• The tip of the posterior spine of the palatine bone in

  the hard palate?

  Posterior nasal spine (PNS)
• The point of intersection of the dorsal contours of the posterior border of the mandible and temporal bone?

  Articulare (Ar).
• A transverse plane through

  the skull represented by the line joining porion and orbitale?

  Frankfort plane.
• The uppermost point of the

  bony external auditory meatus, usually regarded as coincidental with the uppermost point of the ear rods of the cephalostat?

  Porion (Po)
• A transverse plane through

  the skull representing the lower border of the horizontal ramus of the mandible?

  Mandibular plane
• There are several definitions of mandibular plane

  ➔ A tangent to the lower border of the mandible

  ➔ A line joining gnathion and gonion

  ➔ A line joining menton and gonion.
• A transverse plane through

  the skull represented by a joining of the anterior and posterior nasal spines?

  Maxillary plane.
• A transverse plane through

  the skull represented by the line joining sella and nasion?

  SN plane.
• Relates the anteroposterior

  position of the maxilla, as represented by the A point, to the cranial base?

  SNA
• Relates the anteroposterior

  position of the mandible, as represented by the B point, to the cranial base?

  SNB
• Relates the anteroposterior

  position of the maxilla to the mandible, ie. indicates the anteroposterior skeletal pattern - Class I, ll or I11?

  ANB
• The angle between the

  long axis of the maxillary incisors and the maxillary plane?

  Maxillary incisal inclination.
• The angle between the long

  axis of the mandibular incisors and the mandibular plane?

  Mandibular incisal inclination.