Bones of the Skull 2 Flashcards
What structure passes through the pterygomaxillary fissure?
The maxillary nerve
Where does the pterygomaxillary fissure appear on panoramic x-ray?
Behind the posterior wall of the maxillary sinus
What is the significance of the proximity of the inferior orbital fissure to the pterygomaxillary fissure?
A nerve block in this region could cause symptoms to vision and eyeball motility.
What are potential consequences of bad technique when administering local anaesthetic?
The venous plexus near the pterygomaxillary fissure can be hit causing haemorrhage leading to symptoms like pressure in the eyeball.
Parotid gland can be anaesthetized which contains the facial nerve causing facial drooping.
What bones besides the sphenoid and the maxilla are present around the pterygomaxillary fissure?
Palatine bone Suture between maxila and palatine bone
How does the maxillary nerve get to the oral cavity?
It moves from the cranial cavity through foramen rotundum through the pterygomaxillary fissure through the pterygopalatine fossa into the maxilla.
How does the mandibular nerve travel from the brain to the mandible?
Through the foramen ovale and it is facing down which goes from superior to inferior direction enters the mandibular foramen under the lingula, through the mylohyoid groove. This site can be entry for mylohyoid nerve as well as lingual nerve.
How does the ramus of the mandible relate to the pterygomaxillary fissure?
Ramus of mandible partially covers the entry into the pterygomaxillary fissure because it is present laterally to it.
What lies between the coronoid process of the mandible and the mandibular condyle?
The mandibular notch (AKA incisura semilunaris)
What ridge of the mandlble connects to the mylohyoid muscle?
The mylohyoid ridge.
What is located within the submandibular fossa?
The submandibular gland.
Where is the sublingual fossa located?
Anterior right under the premolars and canines
What is the external oblique ridge?
A landmark used for anaesthetizing the anterior border of the ramus of the mandible.
Where is the mandibular foramen located?
Underneath the lingula and the external oblique ridge.
Where is the lingual foramen located and what is located near it? What passes through this?
The genial tubercle is located lateral to it and the digastric fossa.
Anterior and posterior digastric muscles attach to the digastric fossae.
