Unit Iii Bony Landmarks

Front 1

Mandibular body
-landmarks

Back 1

mental foramen; digastric fossa; alveolar part; mylohyoid line, submandibular fossa, sublingual fossa, superior/inferior genial tubercle, mylohyoid groove

Front 2

Mandibular ramus
-landmarks

Back 2

angle; mandib. foramen, mandib. canal, lingula, mylohyoid groove; oblique line; coronoid p., temporal crest; mandib.(sigmoid) notch; condylar p., head, medial/lateral pole, neck, pterygoid fovea

Front 3

Hyoid bone
-landmarks

Back 3

body; greater cornu; lesser cornu

Front 4

Occipital bone
-landmarks

Back 4

ext occ. protub., sup nuchal line, inf nuchal line, internal occipital protub., sup sagittal sulcus, sulcus for transverse sinus; foramen magnum, pharyngeal tubercle; occ. condyles, hypoglossal canal, jugular notch/foramen

Front 5

Sphenoid bone, body
-landmarks

Back 5

sulcus chiasmatis, optic canal, sella turcica, hypophyseal fossa, posterior clinoid processes, carotid groove, sphenoid sinus

Front 6

Sphenoid bone, wings
-landmarks

Back 6

Greater: cerebral surfaces, fora. rotundum, fora. ovale, spine, fora. spinosum, lat. surface, orbital surface, sup. orbital fissure, fora. lacerum; Lesser: ant clinoid processes

Front 7

Sphenoid bone, pterygoid process
-landmarks

Back 7

pterygoid fossa, scaphoid fossa, pterygoid canal, lat. pterygoid plate, med. pterygoid plate, pterygoid hamulus

Front 8

Temporal bone, squamous part
-landmarks

Back 8

temporal surface, mandib. fossa, articular eminence/tubercle, petrotympanic fiss., squamotympanic fiss., tegmen tympanii, opening of osseous portion of auditory tube, external auditory meatus

Front 9

Temporal bone, mastoid part
-landmarks

Back 9

mastoid process, mastoid notch, occipital groove, sigmoid sulcus

Front 10

Temporal bone, petrous part
-landmarks

Back 10

trigeminal impression; post surface: internal auditory meatus; inf surface: carotid canal, jugular fossa, canaliculus for tympanic n; sup border: groove for sup petrosal sinus