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Final SG Flashcards

(67 cards)

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1
Q

foreshortening

A

excessive (too much) vertical angulation

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2
Q

how incorrect film packet placement happens

A

operator placed bite block at least 1cm above occlusal surface of mandibular teeth

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3
Q

how to correct incorrect film packet placement

A

instrument and image receptor may be angled and tongue gently displaced to allow bite block to rest against teeth of interest before patient closes
also can place cotton roll on opposite surface.

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4
Q

bending of upper edge of film against palate

A

most of the distortion will be localized to bend area

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5
Q

elongation because of

A

improper vertical angulation

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6
Q

a carious lesion has

A

jagged margins

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7
Q

a composite has

A

a definite cut

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8
Q

erupting teeth

A

primary teeth undergoing external resorption due to eruptive force of permanent teeth

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9
Q

external resorption starts

A

from outside in

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10
Q

mylohyoid ridge/line is

A

posterior extension of mental ridge

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11
Q

lingual nerve transverse

A

lingual foramen

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12
Q

submandibular fossa houses

A

submandibular salivary gland

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13
Q

alveolar crest typically appears _____ below cementoenamel junction

A

1.5 to 2mm

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14
Q

PDL space appears as

A

a thing radiolucent line around root of tooth

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15
Q

incorrect horizontal angulation results in

A

overlapped contact areas

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16
Q

no apices are seen

A

improper placement of film packet

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17
Q

improper placement

A

a dropped corner is seen when edge of receptor is not placed parallel to incisal or occlusal surfaces of teeth

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18
Q

if vertical angulation is _______, image of tooth on receptor is shorter than actual tooth; images are foreshortened

A

too steep (excessive)

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19
Q

if vertical angulation is too steep (excessive)

A

the image of the tooth on receptor is shorter than actual tooth; images are foreshortened

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20
Q

how to correct if image is foreshortened

A

increase vertical angulation

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21
Q

if vertical angulation is ______, the image of tooth on receptor is longer than actual tooth; images are elongated

A

too flat (insufficient)

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22
Q

if vertical angulation is too flat (insufficient)

A

the image of tooth on receptor is longer than actual tooth; images are elongated

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23
Q

how to correct if image is elongated

A

decrease vertical angulation

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24
Q

a cone cut is seen when the position indicating device (PID)

A

is not properly aligned with periapical beam alignment device

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25
a cone cut is seen as
a curved unexposed (clear) area on radiograph
26
overlapped interproximal contacts result from
incorrect horizontal angulation
27
incorrect vertical angulation causes images
to appear distorted
28
vertical BW angulation
+10 degrees
29
horizontal BW angulation
+20 to 30 degrees
30
what makes rampant caries
greater than 3 areas in mouth
31
cone cut is seen when PID
is not properly aligned with bitewing beam alignment device
32
bent film results in
distorted or elongated image
33
bent film appearance
images appear stretched and distorted
34
bent film cause
film bent excessively b/c of curvature of patient's hard palate. As result, stretched and distorted images seen on radiograph
35
bent film correction
check film placement before exposure | if film bent b/c of curvature of hard palate, cotton rolls can be used with paralleling technique or bisecting technique
36
film crease is seen as
a thin radiolucent line on radiograph
37
film crease cause
film creased and emulsion cracked
38
to correct film creasing
do not bend or crease film excessively. instead, gently soften corners of film before placing in patient's mouth
39
double exposure cause
same receptor exposed twice in patient's mouth.
40
result of double exposure
double image seen on radiograph
41
correction of double exposure
always separate exposed and unexposed receptors. once receptor has been exposed, place in designated area
42
movement results in
a blurred image
43
movement appearance
blurred images seen on radiograph
44
movement cause
either tubehead or patient moved during exposure of receptor
45
movement correction
stabilize tubehead and patient's head before exposing receptor. instruct patient to remain still but don't say "don't move"
46
reversed film causes image
that appears light with a herringbone pattern
47
too much vertical angulation results in images that are
foreshortened
48
too little vertical angulation results in images that are
elongated
49
incorrect horizontal angulation results in images that are
overlapped
50
what errors can occur with bitewing technique
elongation overlapped contacts cone cut
51
what errors can occur with bisecting technique
elongation overlapped contacts cone cut phalangioma
52
hole or opening in bone
canal
53
broad, shallow depression in bone
foramen
54
cavity, recess, or hollow space in bone
fossa
55
passageweay through bone
sinus
56
spongelike bone
cancellous
57
cancellous is also known as
trebeculae
58
bony partition that separates two spaces
septum
59
immovebale joint between bones
suture
60
hard or compact bone
cortical
61
root canal treatments are filled with
gutta percha
62
Cervical burnout
Radiolucency on both sides of cervical region
63
CEJ
enamel forms first, then cementum meets enamel | cementum overlaps enamel
64
alveolar bone proper
lamina dura radiographically | lines the tooth socket
65
what makes inverted y
when border of nasal fossa and border of maxillary sinus meet
66
coronoid process is visible
in maxillary molar PA
67
lingual foramen is
apical to 24&25

Radiology (6 decks)

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