Anatomy Flashcards
What shape is the pterygomaxilliary fissure? What structures are associated with it?
Tear dropped
It connects the infratemporal with the pterygopalatine fossa, and transmits the terminal part of the maxillary artery.
The posterior superior alveolar nerve of the maxillary nerve goes from the pterygopalatine fossa to the infratemporal region via this fissure.
In older texts, the pterygomaxillary fissure is sometimes called the pterygopalatine fissure.
What is the hamulus?
Small boney spine which is the extension of the lateral pterygoid plate
What are the borders of the pterygomaxilliary fissure?
Anterior: post wall maxillary sinus Posterior: lateral pterygoid plate
What structure is either C-J shapes?
Malar process
What does the malar process signify?
The point where the zygomatic arch is joined to the maxilla
What is the anterior loop?
This is the route of the inferior dental nerve. It loops in the 4/5 region and then passes inferiorly
Where does the extern oblique ridge run?
Externally from the superior aspect of the posterior body of the mandible to the necks of the molar teeth
Which muscle attaches to the external oblique ridge?
Buccinator
How do you differentiate between the external and internal oblique ridge?
The external oblique ridge is always superior
What is the function of the internal oblique ridge?
Attachment for Mylohyoid
What other structure may be confused with the internal oblique ridge?
The IDN canal
What is the difference between the internal oblique ridge compared to IDN canal?
It starts from the molars and extends to the premolars
How does the inferior border of the mandible appear radiographically?
A thick Radiopaque line
What passes through the incisive foramen?
The Nasopalatine nerve and artery
Which soft tissues can be seen on the upper anterior films?
Border of nose Lip line Alar cartilage of nose
How can you differentiate between the upper lip and the nose?
The nose is now shaped and runs through the roots of the teeth The upper lip runs through the crowns of the teeth
I’m which projection will you see the alar of the nose?
This will be seen on the upper lateral view in the canine region
What structure if formed by the intersection of the anterior wall of the sinus and the floor of the nose?
Y line of Ennis
What is the name of the notch between the coronoid and condyle process?
Sigmoid notch
What are the two tubercles visible radiographically?
Genial and mental
Which tubercles are present lingually?
Genial
Which tubercles are present labially?
Mental
What attaches to the genial tubercles?
The Genioglossus and geniohyoid
If the head on a DPT is tipped downwards how does this affect the view of the hyoid bone?
You can see the body of the hyoid as a triangular radiopacity on the body of the mandible
