Quiz 1 - Craniometric points Flashcards
Incision
the point at the occlusal surface where the upper central incisors meet
Alveolare
(infradentale superius) the midline point at the inferior tip of the bony septum between the upper central incisors
Prosthion
the midline point at the most anterior point on the alveolar process of the maxillae
Nasospinale
the point where a line tangent to the inferiormost points of the two curves of the inferior nasal aperture margin crosses the midline
Rhinion
the midline point at the inferior free end of the internasal suture
Nasion
the midline point where the two nasal bones and the frontal intersect
Glabella
the most anterior midline point on the frontal bone, usually above the frontonasal suture
Metopion
instrumentally determined, ectocranial midline point at the frontal where the frontal’s elevation above the chord from nasion to bregma is greatest
Bregma
the ectocranial point where the coronal and sagittal sutures intersect
Vertex
determined instrumentally when the skull is in Frankfurt Horizontal. It is the highest ectocranial point on the skull’s midline
apex
instrumentally determined ectocranial midline point placed where a coronal plane through the right and left portia intersects the midsagittal skull outline
obelion
ectocranial midline point where a line connecting the parietal foramina (when present) intersects the midline
Lamdbda
the ectocranial midline point where the sagittal and lambdoidal sutures intersect. When in doubt, choose the point where the lateral halves of the lambdoidal suture and lower end of the sagittal suture would be projected to meet.
Opisthocranion
instrumentally determined point at the rear of the cranium. It is defined as the midline ectocranial point at the farthest chord length from glabella
inion
the ectocranial midline point at the base of the external occipital protuberance. The bony anatomy is highly variable. Normally, inion is defined as the point at which the superior nuchal lines merge in the external occipital protuberance.
Opisthion
the midline point at the posterior margin of the foramen magnum
Basion
the midline point at the anterior margin of the foramen magnum.
Sphenobasion
the point where the midsagittal plane intersects the sphenooccipital suture.
Hormion
the most posterior midline point of the vomer
Alveolon
the point on the interpalatal suture where a line drawn between the posterior ends of the alveolar ridges crosses the midline
Staphylion
the point on the interpalatal suture where a line drawn between the deepest parts of the notches at the rear of the palate crosses the midline
Orale
the midline point on the hard palate where a line drawn tangent to the posterior margins of the central incisor alveoli crosses the midline
Gnathion
the most inferior midline point on the mandible
Pogonion
the most anterior midline point on the chin of the mandible
Infradentale
the midline point at the superior tip of the septum between the mandibular central incisors
Zygomaxillare
the most inferior point on the zygomaticomaxillary suture
Alare
instrumentally determined as the most lateral point on the margin of the nasal aperture
orbitale
the lowest point on the orbital margin
Zygion
instrumentally determined point of maximum lateral extent of the lateral surface of the zygomatic arch
Jugale
the point in the depth of the notch between the temporal and frontal processes of the zygomatic
Ectoconchion
instrumentally determined as the most lateral point on the orbital margin
Maxillofrontale
the point where the anterior lacrimal crest of the maxilla meets the frontomaxillary suture
Lacrimale
the point where the posterior lacrimal crest meets the frontolacrimal suture
Dacryon
the point where the lacrimomaxillary suture meets the frontal bone
Zygoorbitale
the point where the orbital rim intersects the zygomaticomaxillary suture
frontomalare orbitale
the point where the frontozygomatic suture crosses the inner orbital rim
Frontomalare temporale
The most laterally positioned point on the fronto-malar suture
Frontotemporale
the point where the temporal line reaches its most anteromedial position on the frontal
Stephanion
the point where the coronal suture crosses the temporal line
Pterion
region, not a point, where the frontal, temporal, parietal, and sphenoid meet on the side of the vault. The sutural contact pattern in this area is highly variable
Coronale
the point on the coronal suture where the breadth of the frontal bone is greatest
Euryon
the instrumentally determined ectocranial point of greatest cranial breadth
Porion
the uppermost point on the margin of the external auditory meatus
Auriculare
a point vertically above the center of the external auditory meatus at the root of the zygomatic process, a few mm above the porion
Asterion
the point where the lambdoidal, parietomastoid, and occipitomastoid sutures meet
Mastoidale
the most inferior point on the mastoid process
Ectomolare
the most lateral point on the outer surface of the alveolar margins of the maxilla, often at the second molar position
Endomolare
the most medial point on the inner surface of the alveolar margin opposite the center of the M2 crown
Condylion laterale
the most lateral point on the mandibular condyle
Condylion mediale
the most medial point on the mandibular condyle
Coronion
the point at the tip of the coronoid process of the mandible
Gonion
the point along the rounded posteroinferior corner of the mandible between the ramus and the body. To determine the point, imagine extending the posterior ramus border and the inferior corpus border to form an obtuse angle. The line bisecting this angle meets the curved gonial edge at gonion
Mentale
the most inferior point on the margin of the mandibular mental foramen
