09 Facial Skeleton and Skull Base Anatomy Flashcards
What is the craniofacial ratio at birth? in adulthood?
8:1; 2:1
Which facial fractures are more common in kids than adults
High facial fx (orbital roof, temporal bone fx)
What is the foramen of Morgagni and its clinical significance
gap b/w superior constrictor muscle and skull base. Serves as a potential route for spread of NP tumors to skull base and brain
Where is dorello’s canal and what nerve does it contain
B/w petrous tip and sphenoid bone; contains VI and inferior petrosal sinus
Does foramen rotundum lie lateral or medial to pterygoid canal
lateral
What is the largest artery in the pterygopalatine fossa
sphenopalatine
Name of opening through which the maxillary artery passes after giving rise to infraorbital and posterior superior alveolar branches
pterygomaxillary fissure and becomes sphenopalatine artery
What muscle protracts the mandible
lateral pterygoid
what type of joint is TMJ
ginglymoarthrodial (hinge/sliding)
what muscle inserts on disk of TMJ
superior park of the lateral pterygoid muscle
what is normal interincisal opening
40-50 mm
why is the midface inherently prone to deficient projection
lacks good sagittal buttresses
what are the 3 paired vertical buttresses of midface
nasomaxillary, zygomaticomaxillary, pterygomaxillar
what are the horizontal buttresses of midface
frontal bar and cranial base, zygomatic arch and temporal process of zygoma, maxillary plate and alveolus, greater wing and pterygoid plates of sphenoid
what is the strongest attachment of the zygoma
ZF buttress
