9 Maxillary sinus Flashcards
how many ethmoidal sinuses are there
lots
what tooth is most closely related to the maxillary sinus
1st upper molar
what is it called if upon extraction of a molar tooth the bone that borders into the maxillary sinus is broken
oro-antral communication
what is it called if an oro-antral communicaiton has been there so long the epithelium has joined
oro-antral fistula
what nerve runs in the roof of the sinus and branches to the upper teeth
infraorbital nerve
what is it called when the orbital breaks, fracture involves the infraorbital nerve and leads to a numb face
blow out fracture of the orbital floor
why is infection in the maxillary sinus hard to treat
the opening to it is so far up
what is the normal lining of the maxillary sinus
respiratory epithelium
what type of tumour usually presents in the maxillary sinus
squamous cell carcinoma
what do patients with a squamous cell carcinoma of the maxillary sinus present as
- Half have pain in the face as tumour is interfering with infraorbital nerve
- Half have the tumour passing into the oral cavity through the maxillary sinus floor
what foramen does the maxillary nerve (nasopalatine) and arteries come through
sphenopalatine foramen
where is in the maxillary sinus
- nasolacrimal duct
- infraorbital nerve
- anterior superior alveolar nerve
- middle superior alveolar nerve
- posterior superior alveolar nerve
where is the infraorbital nerve in the maxillary sinus
inside the bone
what does the anterior superior alveolar nerve supply
- incisors
- canines
what does the middle superior alveolar nerve supply
- premolars
what does the posterior superior alveolar nerve supply
- molars
what does the infraorbital nerve supply
- skin of face
- front of cheek
- side of nose
- lower eyelid
- upper lip
- mucosa inside lip
- gingiva anterior to incisor teeth
when does the maxillary nerve change its name to infraorbital nerve
as soon as it passes through the infraorbital fissure
what is the floor of the orbit the same as
the roof of the maxillary sinus
where is the infraorbital foramen
under shelf of bone, deep to muscles e.g. levator anguli oris
what does the infraorbital nerve branch to after going through the infraorbital foramen
- Nasal (side of nose)
- palpebral (lower eyelid)
- labial branches (cheek)
what foramen does the greater palatine nerve come through
greater palatine foramen
apart from the greater palatine nerve, what else comes through the greater palatine foramen
greater palatine artery
what does the greater palatine nerve supply
posterior 2/3 of hard palate on its own side
what do the lesser palatine nerves supply
soft palate
what do the lesser palatine nerves come off of
greater palatine nerve
why is it important to not anaesthise the lesser palatine nerves
important for swallowing
describe the course of the greater palatine artery
comes from maxillary artery and into groove in the bone
after passing through the foramen rotundum, the maxillary nerve has a ganglion, what’s it called
pterygopalatine ganglion
what nerves come off of the pterygopalatine ganglion
- pharyngeal branch
- nasopalatine nerve and nasal branches
- greater palatine nerve
