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oral radiology > skull radiography and occlusal radiography > Flashcards

skull radiography and occlusal radiography Flashcards

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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

Study These Flashcards
A

pt facing down, 30 degrees btwn tragocanthal and central beam

23
Q

why would reverse towne be better than regular?

Study These Flashcards
A

structures for imaging closer to receptor=smaller pneumbra

24
Q

indications of reverse towne

Study These Flashcards
A

Occiput
Subcondylar fractures

25
occlusal radiography indications
Large segment of dental arch Limited opening
26
clinical uses occlusal radiogrpahy
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
dental film/PSPP sizes
0 - pediatric 1 – PA , pediatric 2 - Standard 3 – special BW 4 - occlusal
28
can we use CMOS/CCD for occlusal?
no
29
upper arch occ radiographs
1. Anterior maxillary occlusal projection 2. Topographic maxillary occlusal projection 3. Lateral maxillary occlusal projection
30
# vert angle and central ray ant upper arch occ projection
Vertical Angle: (+) 45 degrees Central Ray: through tip of the nose
31
what can be seen with anterior upper arch occ projections
Anterior maxilla, canine to canine, Anterior floor of nasal fossa
32
# vert angle? central beam? Topographic Maxillary Occlusal Projection
Vertical Angle: (+) 65 degrees Central Ray: through bridge of the nose
33
Topographic Maxillary Occlusal Projection shows:
Palate, nasal septum Maxillary 2nd molar to 2nd molar Anterioinferior portion of maxillary sinuses Nasolacrimal canals
34
use of occ radiogrpahs in pedo
can be used for the anterior (Anterior Maxillary Occlusal Projection) use size 2 film not 4
35
# vert angle? central beam? Lateral Maxillary Occlusal Projection
Vertical Angle: (+) 60 degrees Central Ray: 2cm below lateral canthus of eye 90 rotation of tube head (on lateral)
36
Lateral Maxillary Occlusal Projection shows:
Quadrant of maxillary ridge Lateral incisor to contralateral 3rd molar Inferolateral portion of maxillary sinus
37
Mandibular Occlusal Radiography techniques
1. Anterior Mandibular Occlusal Projection 2. Topographic (Cross-Sectional) Mandibular Occlusal Projection 3. Lateral Mandibular Occlusal Projection
38
Anterior MandibularOcclusal Projection Vertical Angle: Central Ray:
Anterior Mandibular Occlusal Projection Vertical Angle: -55 to plane of receptor Central Ray: through tip of chin
39
Anterior MandibularOcclusal Projection shows:
Anterior mandible, canine to canine, Inferior cortex of mandible
40
Topographic Mandibular Occlusal Projection Vertical Angle: Central Ray:
Vertical Angle: perpendicular to receptor Central Ray: in midline, through floor of mouth long side receptor M to L not A to P
41
Topographic Mandibular Occlusal Projection shows:
Floor of mouth Buccal/lingual cortex of mandible from 2nd molar to 2nd molar
42
Topographic Mandibular Occlusal Projection used for what pathologies?
sialoiths and tori
43
Lateral Mandibular Occlusal Projection Vertical Angle: Central Ray:
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
Lateral Mandibular Occlusal Projection shows:
Half of floor of mouth Lateral incisor to contralateral third molar Buccal/lingual cortex of half of mandible
45
lateral cephalometric projection
46
PA cephalometric projection
47
waters projection
48
submentovertex projection
49
reverse towns projection
50
ant max occ projection
51
topographic max occ projection
52
lat max projection
53
ant man occ projection
54
topogrpahic man occ projection

oral radiology (22 decks)

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