9 Maxillary sinus

Question 1

how many ethmoidal sinuses are there

Answer 1

lots

Question 2

what tooth is most closely related to the maxillary sinus

Answer 2

1st upper molar

Question 3

what is it called if upon extraction of a molar tooth the bone that borders into the maxillary sinus is broken

Answer 3

oro-antral communication

Question 4

what is it called if an oro-antral communicaiton has been there so long the epithelium has joined

Answer 4

oro-antral fistula

Question 5

what nerve runs in the roof of the sinus and branches to the upper teeth

Answer 5

infraorbital nerve

Question 6

what is it called when the orbital breaks, fracture involves the infraorbital nerve and leads to a numb face

Answer 6

blow out fracture of the orbital floor

Question 7

why is infection in the maxillary sinus hard to treat

Answer 7

the opening to it is so far up

Question 8

what is the normal lining of the maxillary sinus

Answer 8

respiratory epithelium

Question 9

what type of tumour usually presents in the maxillary sinus

Answer 9

squamous cell carcinoma

Question 10

what do patients with a squamous cell carcinoma of the maxillary sinus present as

Answer 10

• 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

Question 11

what foramen does the maxillary nerve (nasopalatine) and arteries come through

Answer 11

sphenopalatine foramen

Question 12

where is in the maxillary sinus

Answer 12

• nasolacrimal duct
• infraorbital nerve
• anterior superior alveolar nerve
• middle superior alveolar nerve
• posterior superior alveolar nerve

Question 13

where is the infraorbital nerve in the maxillary sinus

Answer 13

inside the bone

Question 14

what does the anterior superior alveolar nerve supply

Answer 14

• incisors

- canines

Question 15

what does the middle superior alveolar nerve supply

Answer 15

• premolars

Question 16

what does the posterior superior alveolar nerve supply

Answer 16

• molars

Question 17

what does the infraorbital nerve supply

Answer 17

• skin of face
• front of cheek
• side of nose
• lower eyelid
• upper lip
• mucosa inside lip
• gingiva anterior to incisor teeth

Question 18

when does the maxillary nerve change its name to infraorbital nerve

Answer 18

as soon as it passes through the infraorbital fissure

Question 19

what is the floor of the orbit the same as

Answer 19

the roof of the maxillary sinus

Question 20

where is the infraorbital foramen

Answer 20

under shelf of bone, deep to muscles e.g. levator anguli oris

Question 21

what does the infraorbital nerve branch to after going through the infraorbital foramen

Answer 21

• Nasal (side of nose)
• palpebral (lower eyelid)
• labial branches (cheek)

Question 22

what foramen does the greater palatine nerve come through

Answer 22

greater palatine foramen

Question 23

apart from the greater palatine nerve, what else comes through the greater palatine foramen

Answer 23

greater palatine artery

Question 24

what does the greater palatine nerve supply

Answer 24

posterior 2/3 of hard palate on its own side

Question 25

what do the lesser palatine nerves supply

Answer 25

soft palate

Question 26

what do the lesser palatine nerves come off of

Answer 26

greater palatine nerve

Question 27

why is it important to not anaesthise the lesser palatine nerves

Answer 27

important for swallowing

Question 28

describe the course of the greater palatine artery

Answer 28

comes from maxillary artery and into groove in the bone

Question 29

after passing through the foramen rotundum, the maxillary nerve has a ganglion, what’s it called

Answer 29

pterygopalatine ganglion

Question 30

what nerves come off of the pterygopalatine ganglion

Answer 30

• pharyngeal branch
• nasopalatine nerve and nasal branches
• greater palatine nerve