Palate and PPF - SRS Flashcards
What approach is used to remove tumors from the PPF or to ligate the sphenopalatine artery in cases of chronic epistaxis?
Transantral access to PPF:
Upper lip is elevatedf and the maxillary sinus is entered anteriorly to then reach the PPF..
What are the general contents of the pterygopalatine fossa?
- Maxillary artery – third (pterygopalatine) portion
- Maxillary branch of trigeminal nerve (V2)
- Pterygopalatine ganglion
Identify the following boundaries of the pterygopalatine fossa…
A.Lateral –
B.Superior –
C.Anterior –
D.Medial –
E.Inferior –
F.Posterior –
A.Lateral – pteygomaxillary fissure
B.Superior – greater wing of sphenoid bone
C.Anterior – maxilla
D.Medial – palatine bone
E.Inferior – open via pterygopalatine canal
F.Posterior – pterygoid process of sphenoid bone
What are the openings of the pterygopalatine fossa?
(7)
- Pterygomaxillary fissure
- Inferior orbital fissure
- Sphenopalatine foramen
- pterygopalatine canal
- Foramen rotundum
- pterygoid canal
- pharyngeal canal
The pterygomaxillary fissure is lateral to the pterygopalatine fossa, and communicates with the infratemporal fossa. What does it transmit?
- maxillary a.
- posterior superior alveolar a.v.n
The inferior orbital fissure is anterior to the PPF and communicates with the orbit. What does it transmit?
- infraorbital a.v.n.;
- zygomatic a.v.n.
- (Inferior opthalmic vein also, though not mentioned in Dr. Funk’s notes)
The sphenopalatine foramen is medial to the PPF, and communicates with the nasal cavity. What does it transmit?
- Sphenopalatine a.
- Nasopalatine n.
- Posterior superior Lateral nasal n.
Foramen rotundum transmits V2 and communicates with the middle cranial fossa. Where is it in relation to the PPF?
Posterior
Is lateral most of the three posterior openings
The pterygoid canal is posterior to the PPF. and the middle of the three posterior openings. It communicates with the middle cranial fossa near foramen lacerum. What does it transmit?
Nerve and artery of the pterygoid canal
The pharyngeal canal is posterior to the PPF, and the medial most of the three posterior openings. It passes the pharyngeal n.a.v..
What does it communicate with?
Nasopharynx
1.The maxillary artery courses through the infratemporal fossa; its third portion then enters the PPF through the pterygomaxillary fissure. What are the branches of the pterygopalatine portion of the maxillary artery?
- Posterior Superior Alveolar a.
- Infraorbital a.
- Descending palatine a.
- Artery of the pterygoid canal
- Pharyngeal a.
- Sphenopalatine a.
What does the posterior superior alveolar a. supply?
- Maxillary teeth
- maxillary gingiva
- Maxillary sinus
What does the infraorbital a. supply?
Supplies floor of orbit, maxillary sinus, maxillary teeth, and the skin of the face via the following branches.
What are the branches of the infraorbital a. ?
- Zygomatic artery
- Middle superior alveolar a.
- Anterior superior alveolar a.
- Nasal branches
- Superior labial branches
The descending palatine artery exits the PPF inferiorly via the pterygopalatine canal. What does it supply? By what branches?
- Supplies the palate, nasal cavity, and palatine tonsil via the following branches:
a. Greater palatine a.
b. Lesser palatine a.
What does V2 provide GSA to?
- Middle dermatome of face
- Nasal Cavity
- paranasal sinuses
- maxillary teeth
The maxillary nerve distributes parasympathetic innervation from what ganglion?
pterygopalatine ganglion
What are the branches of V2?
- Meningeal branch (to dura of middle cranial fossa)
- Zygomatic n.
- Posterior superior alveolar n.
- Infraorbital n.
- pterygopalatine nn.
- Greater palatine n.
- lesser palatine n.
- Posterior Superior Lateral nasal n.
- Pharyngeal n.
- N of the pterygoid canal
- nasopalatine n.
Where should you inject to anesthetize the nasopalatine nerve?
Near the incisive foramen
Where would you inject to anesthetize the greater palatine n?
Greater palatine foramen
What fibers does the PPG recieve from the greater petrosal n.?
Preganglionic parasympathetics from VII
What fibers does the PPG recieve from the deep petrosal n.?
What does the descending palatine artery supply blood to?
- palate
- nasal cavity
- palatine tonsil
What does the postertior superior alveolar artery provide blood too?
- Maxillary teeth
- gingiva
- Maxillary sinus
What does the infraorbital artery supply blood to?
- Floor of orbit
- maxillary sinus
- maxillary face
- skin of face
What does the pharyngeal a. supply blood to?
- nasopharynx
- auditory tube
- sphenoid sinus
What does the artery of the pterygoid canal supply blood to?
- Nasopharynx
- Auditory Tube
- Tympanic Cavity
What does the sphenopalatine artery provide blood to?
Nasal cavity
