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BDS2.5 Anatomy > Sinuses > Flashcards

Sinuses Flashcards

1
Q

What are the paranasal sinuses?

A

Frontal
Maxillary
Ethmoidal
Sphenoidal

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2
Q

What are the ethmoidal sinuses?

A

Anterior
Middle
Posterior

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3
Q

What drains into the superior meatus?

A

Posterior ethmoidal sinuses

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4
Q

What drains into the middle meatus?

A

Anterior and middle,d ethmoidal sinuses
Frontal sinuses
Maxillary sinuses

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5
Q

What drains into the inferior meatus?

A

No sinuses but the nasolacrimal duct

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6
Q

What drains into the sphenoethmoidal duct?

A

Sphenoidal air sinus

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7
Q
A
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8
Q
A

A = hypophyseal fossa
B = sphenoid sinus

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9
Q
A
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10
Q
A

Frontal sinus

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11
Q

What is the role of the frontal sinus?

A

Insulate the brain

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12
Q
A

Ethmoidal sinuses

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13
Q
A

A = middle concha
B = inferior concha

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14
Q

Why can’t you see the inferior concha?

A

It is situated more posteriorly

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15
Q
A

Maxillary sinus

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16
Q
A

Frontal sinus

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17
Q
A

Maxillary sinus

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18
Q

Can an infection from the teeth/pulp cause infection elsewhere?

A

Yes, in the maxillary sinus

Sinusitis

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19
Q

What nerve is this and is it a branch of?

A

The Infraorbital nerve, branch of the maxillary nerve

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20
Q
A

Mastoid air cells

21
Q
A

Ethmoidal sinuses

22
Q
A

Sphenoidal sinus

23
Q
A

Hyosemilunaris of the maxillary sinus

24
Q

What are the growth stages of the frontal and maxillary sinus?

A

1, 4, 7, 12 then an adult frontal/ maxillary sinus

25
Q

What can happen if you remove this tooth in a late adult?

A

Oral-antral fistula

26
Q

What scan is this?

A

CT

27
Q
A

A = ethmoidal
B = ethmoidal
C = conchae
D = middle conchae
E = septum
F = inferior conchae
G = maxillary sinus
H = uncinate process

28
Q

Why does the maxillary sinus block easily?

A

It’s a small opening for infection to drain

29
Q
A

Infraorbital ethmoidal cells or haller cells

30
Q

If someone has a headache, what could cause this?

A

Pain in forehead, as frontal sinus is infected

31
Q
A

Nasolacrimal duct

32
Q
A

A = nasolacrimal duct
B = infratemporal fossa
C = nasopharyngeal
D = pterygopalatine fossa
E = maxillary sinus
F = conchae

33
Q
A

A = Lamina papyracea
B = ethmoid
C = sphenoid
D = middle crania fossa

34
Q

What do the ‘Xs’ indicate?

A

Potential areas of obstruction

35
Q

What complex is shown?

A

Ostiomeatal complex

36
Q

What do the arrows indicate?

A

Show direction of mucociliary clearance

37
Q

What does A represent?

A

Anterior ethmoidal artery

38
Q

Why is A important?

A

Important in endoscopic sinus surgery

39
Q

What is shown in this x-ray?

A

Fluid in maxillary sinuses

Sinusitis

40
Q

Does A or B have fluid build up?

A

B

41
Q

This patient has sinusitis, how do you know?

A

Patient has chronic sinusitis

The lining of the muscles membrane is irregular (usually smooth)

Granulation issues

Ethmoidal sinus is also blocked

Opening of maxillary sinus also blocked

42
Q

What type of sinusitis is shown here?

A

Maxillary sinusitis

43
Q

What type of scan has been taken?

A

Coronal CT

44
Q

If the right maxillary sinus is not blocked due to fluid, why is it fully blocked?

A

It can be a growth

Abnormal soft tissue extending through through infundibulum

Polyposis or inverted papilloma

45
Q

What is shown in this CT scan? (Black arrow)

A

Cancer (chondrosarcom)

46
Q

What is shown in this CT scan? (White arrows)

A

Arrow head = Intracranial extension is seen along right cavernous sinus

White arrow = right cerebellopontine angle

47
Q

What has occurred here?

A

Inverted papilloma

48
Q

What has occurred here?

A

Chindrosarcoma

BDS2.5 Anatomy (28 decks)

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