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4 Radiology > DPT2 + panoramic anatomy > Flashcards

DPT2 + panoramic anatomy Flashcards

1
Q

In a DPT the image of a skull has been flattened to a 2D image

A
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2
Q

what is the yellow structure of the mandible?

A

condyle

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3
Q

what is the green structure of the mandible?

A

coronoid process

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4
Q

what is the blue structure of the mandible?

A

ramus

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5
Q

what is the red structure of the mandible?

A

angle

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6
Q

what is the purple structure of the mandible?

A

body

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7
Q

what is the pink structure of the mandible?

A

sigmoid notch

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8
Q

what is the yellow structure of the mandible?

A

mandibular foramen

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9
Q

what is the green structure of the mandible?

A

mental foramen

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10
Q

what is the blue structure of the mandible?

A

inferior alveolar canal
upper and lower borders

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11
Q

name this structure of the mandible

A

submandibular fossa
depression on lingual aspect of mandible caused by salivary gland

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12
Q

name the yellow structure

A

hard palate

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13
Q

name the green structure

A

soft palate

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14
Q

name the red structure

A

anterior nasal spine

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15
Q

what is the structure outlined in orange, green and blue?

A

maxillary sinus
medial wall
floor
lateral wall

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16
Q

what is the pink structure?

A

pterygoid plates

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17
Q

what is the red structure?
(top right)

A

pterygomaxillary fissure

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18
Q

what is the yellow structure?

A

zygomatic arch

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19
Q

what is the purple structure?

A

zygomatic buttress

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20
Q

what does a distorted pterygomaxillary fissure suggest?

A

nerve damage

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21
Q

loss of maxillary sinus boundary is an early sign of what?

A

cancer

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22
Q

what is the yellow structure?

A

nasal cartilages

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23
Q

what is the blue structure?

A

nasal septum

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24
Q

what is the green structure?

A

inferior nasal concha

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25
Q

what is the yellow structure?

A

mastoid process

has honeycomb pattern and trabecular bone

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26
Q

what is the green structure?

A

styloid process
(stylohyoid ligament)

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27
Q

what is the blue structure?

A

orbital rim

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28
Q

what is the yellow structure?

A

glenoid/mandibular fossa

29
Q

what is the green structure?

A

articular eminence/tubercle

30
Q

what is the pink structure?

A

spine of sphenoid

31
Q

what is the blue structure?

A

mental fossa

32
Q

be able to identify these

33
Q

what is the green structure?

A

cervical spine

34
Q

what is the red structure?

A

hyoid bone

35
Q

what is this red structure?

A

Pituitary fossa/sella turcica - often not seen but can check if enlarged

36
Q

look at the different stages of tooth development

37
Q

what is the yellow structure?

A

soft palate

38
Q

what is the green structure?

39
Q

what is the red structure?

A

bite block

40
Q

what is the yellow structuer?

41
Q

what is the green structure?

A

external acoustic meatus

42
Q

what is the yellow structure?

A

epiglottis

43
Q

what is the yellow air space?

A

oral cavity

44
Q

what is the green air space?

A

nasal cavity

45
Q

what is the blue air space?

A

nasopharynx

46
Q

what is the pink air space?

A

oropharynx

47
Q

what is this dark area circled red caused by?

48
Q

what are double shadows?

A

Structures located near the centre of rotation can appear twice

49
Q

what structures can appear as double shadows?

A

hyoid bone, soft palate, cervical spine

50
Q

what structure is the blue double shadow?

A

cervical spine

51
Q

what structure is the green double shadow?

A

soft palate

52
Q

what structure is the yellow double shadow?

A

hyoid bone

53
Q

what are ghost shadows?

A

Created by structures between the x-ray source and the centre of rotation

Structures on one side are projected onto the other side

Appear magnified, blurry, higher and transposed to the other side

54
Q

this is a ghost shadow of what?

A

posterior mandible

55
Q

this is a ghost shadow of what?

A

Hard palate ghost shadow above true hard palate

56
Q

the cervical spine is a ghost image

The RHS is a ghost image of the LHS and vice versa

57
Q

ghost shadows can also be of foreign bodies

what is this a ghost shadow of?

58
Q

“Selection Criteria for Dental Radiography” by the Faculty of General Dental Practice (UK)

states that panoramic radiographs should only be taken in the presence of what?

A

specific clinical signs and symptoms” - never to be used for routine screening.

59
Q

selection criteria for DPT in general practice

A

Grossly neglected dentition -> generalised caries

Periodontal bone assessment

Bony lesion or unerupted tooth that cant be seen properly in intra-oral radiographs

Assessment of 3rd molars if planning surgical intervention

Orthodontic assessment

Generally if u cant see full extent on intra-oral radiograph then use panoramic

60
Q

selection criteria for panoramic radiographs in hospitals

A

Fractures of posterior mandible

Maxillary sinus pathology

Destructive diseases of TMJ articular surfaces

Pre-implant planning - bone height or position of anatomical structures

61
Q

panoramic vs periapical (full mouth 10 images)

? shows more anatomical structures

? has lower dose for full dentition

? have higher resolution

A

panoramic

panoramic

periapicals

62
Q

bitewings vs panoramic pseudo bitewing image

? have higher resolution

? allows view of apices not just crowns of molars

Choice depends on what you want to see e.g. if calculus deposits then bitewings

A

bitewings

panoramic

63
Q

what is the difference between panoramic and panoramic pseudo bitewing image?

A

“panoramic pseudo bitewing image” - smaller area radiated -> lower exposure

64
Q

Postero-anterior mandible vs panoramic

? has a lot of superimposition

A

PA mandible

65
Q

lateral cephalogram vs panoramic

? has superimposition

Generally only used in orthodontics to look at jaw positioning

A

lateral cephalogram

66
Q

Anterior oblique maxillary occlusal vs panoramic

With ? can see anatomy at different angles

A

anterior oblique maxillary occlusal

67
Q

cone beam CT vs panoramic

? can see multiple slices at different angled

? has better detail

? has higher radiation exposure

? requires more expensive and advanced equipment

A

cone beam CT for all

68
Q

why does the spine appear bigger here and block the anterior teeth?

A

patient too far back

4 Radiology (19 decks)

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