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oral radiology > skull radiography and occlusal radiography > Flashcards

skull radiography and occlusal radiography Flashcards

1
Q

most commonly used skull radiography

A

lateral cephalometric projection

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2
Q

forms skull radiography

A

LATERAL CEPHALOMETRIC PROJECTION
PA CEPHALOMETRIC PROJECTION
WATERS PROJECTION
SUBMENTOVERTEX PROJECTION
REVERSE TOWNE PROJECTION

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3
Q

planes of imaging to consider

A
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4
Q

CEPHALOMETRIC PROJECTIONS

A

LATERAL CEPHALOMETRIC PROJECTION
PA CEPHALOMETRIC PROJECTION

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5
Q

LATERAL CEPHALOMETRIC PROJECTION

A

mid sag plane parallel to receptor
frankfort parallel to floor
beam perpindicular to reecptor

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6
Q

Be able to
identify:
Maxillary sinus
Frontal sinus
Sphenoid sinus

A

easy

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7
Q

Indications for lat cephalometric projection

A

Orthodontics/ Growth and development
Orthognathic surgery evaluation
Anterior-posterior view of paranasal sinuses

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8
Q

what is happening here

A

younger pt, heterogenous app of skull
outer surface of the brain can cause these convolutional marks
usually more predominant in the posterior
follow up if these become more prom and diffuse

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9
Q

airway in lat cephalometric projections

A

ant post fairly parallel

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10
Q

adenoids (pharyngeal tonsils) in younger pts lateral cephalometric projections

A

can be prominent and narrow airways with hyperplasia
could block eutaschian tubes
could present with dypsnea and sleep apnea

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11
Q

PA cephalometric projection technique

A

facing receptor
frankfort parallel to floor
normal occlusion

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12
Q

Be able to
identify:
Orbits
Nasal cavity
Frontal sinus

A

easy

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13
Q

petrous ridge in PA cephalometric

A

should be in lower half/third of orbit

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14
Q

SKULL PROJECTIONS

A

WATERS PROJECTION
SUBMENTOVERTEX PROJECTION
REVERSE TOWNE PROJECTION

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15
Q

waters projection technique

A

head tilted up
37 degrees btwn central ray and tragocanthal line

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16
Q

Be able to identify:
Maxillary sinuses
Floor of orbit
Inferior rim of orbit

A

easy

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17
Q

PA cephalometric indications

A

Orthodontics/Growth and development
Orthognathic surgery evaluation
Mediolateral developmental changes
Facial asymmetry

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18
Q

waters projection indications

A

Maxillary sinuses
Orbits
Midfacial bones

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19
Q

submentovert projection technique

A

head tipped all the way back and central ray thru the mental

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20
Q

Be able to identify:
Sphenoid sinus
Mandibular condyles

A

easy

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21
Q

submentovert demonstrates

A

Submentovertex demonstrates:
Skull base
Sphenoid sinus
Mandibular condyles
Zygomatic arches

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22
Q

reverse towne technique

A

pt facing down, 30 degrees btwn tragocanthal and central beam

23
Q

why would reverse towne be better than regular?

A

structures for imaging closer to receptor=smaller pneumbra

24
Q

indications of reverse towne

A

Occiput
Subcondylar fractures

25
Q

occlusal radiography indications

A

Large segment of dental arch
Limited opening

26
Q

clinical uses occlusal radiogrpahy

A
  1. Roots, impactions, supernumerary teeth
  2. Foreign bodies, sialoliths
  3. Fractures
  4. Extent of pathoses
  5. Sinus and nasal integrity
  6. Monitor orthodontic palatal expansion
27
Q

dental film/PSPP sizes

A

0 - pediatric
1 – PA , pediatric
2 - Standard
3 – special BW
4 - occlusal

28
Q

can we use CMOS/CCD for occlusal?

29
Q

upper arch occ radiographs

A
  1. Anterior maxillary occlusal projection
  2. Topographic maxillary occlusal projection
  3. Lateral maxillary occlusal projection
30
Q

vert angle and central ray

ant upper arch occ projection

A

Vertical Angle: (+) 45 degrees
Central Ray: through tip of the nose

31
Q

what can be seen with anterior upper arch occ projections

A

Anterior maxilla, canine to canine, Anterior floor of nasal fossa

32
Q

vert angle? central beam?

Topographic Maxillary
Occlusal Projection

A

Vertical Angle: (+) 65 degrees
Central Ray: through bridge of the nose

33
Q

Topographic Maxillary
Occlusal Projection shows:

A

Palate, nasal septum
Maxillary 2nd molar to 2nd molar
Anterioinferior portion of maxillary sinuses
Nasolacrimal canals

34
Q

use of occ radiogrpahs in pedo

A

can be used for the anterior (Anterior Maxillary Occlusal Projection)
use size 2 film not 4

35
Q

vert angle? central beam?

Lateral Maxillary
Occlusal Projection

A

Vertical Angle: (+) 60 degrees
Central Ray: 2cm below lateral canthus of eye
90 rotation of tube head (on lateral)

36
Q

Lateral Maxillary
Occlusal Projection shows:

A

Quadrant of maxillary ridge
Lateral incisor to contralateral 3rd molar
Inferolateral portion of maxillary sinus

37
Q

Mandibular Occlusal Radiography techniques

A
  1. Anterior Mandibular Occlusal Projection
  2. Topographic (Cross-Sectional)
    Mandibular Occlusal Projection
  3. Lateral Mandibular Occlusal Projection
38
Q

Anterior MandibularOcclusal Projection
Vertical Angle:
Central Ray:

A

Anterior Mandibular
Occlusal Projection
Vertical Angle: -55 to plane of receptor
Central Ray: through tip of chin

39
Q

Anterior MandibularOcclusal Projection shows:

A

Anterior mandible, canine to canine, Inferior cortex of mandible

40
Q

Topographic Mandibular Occlusal Projection
Vertical Angle:
Central Ray:

A

Vertical Angle: perpendicular to receptor
Central Ray: in midline, through floor of mouth
long side receptor M to L not A to P

41
Q

Topographic Mandibular Occlusal Projection shows:

A

Floor of mouth
Buccal/lingual cortex of mandible
from 2nd molar to 2nd molar

42
Q

Topographic Mandibular Occlusal Projection used for what pathologies?

A

sialoiths and tori

43
Q

Lateral Mandibular
Occlusal Projection
Vertical Angle:
Central Ray:

A

Vertical Angle: - perpendicular to receptor
Central Ray: - beneath the chin
- 3 cm posterior to chin
- 3 cm lateral to midline
- ONLY CAPTURES ON QUAD
- receptor long side A to P

44
Q

Lateral Mandibular
Occlusal Projection shows:

A

Half of floor of mouth
Lateral incisor to contralateral third molar
Buccal/lingual cortex of half of mandible

45
Q
A

lateral cephalometric projection

46
Q
A

PA cephalometric projection

47
Q
A

waters projection

48
Q
A

submentovertex projection

49
Q
A

reverse towns projection

50
Q
A

ant max occ projection

51
Q
A

topographic max occ projection

52
Q
A

lat max projection

53
Q
A

ant man occ projection

54
Q
A

topogrpahic man occ projection

oral radiology (22 decks)

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