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radiology dhyg 3027 > exam 2 radiology > Flashcards

exam 2 radiology Flashcards

1
Q

not used in radiology(high risk of disease transmission)

A

critical

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2
Q

must be sterilized or use disposable devices/barriers(moderate risk of disease transmission)

A

semicritical

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3
Q

do not come in contact with mucous membranes(low risk)

A

noncritical

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4
Q

used on surfaces, sensors, and PID to reduce the disease-producing microorganisms

A

disinfection

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5
Q

total destruction of disease producing microorganisms

A

sterilization

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6
Q

what do you do to film packet prior to dropping the film into the containment cup

A

remove saliva by swiping the film packet across a disinfectant-soaked paper towel

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7
Q

what is lead apron

A

noncritical

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8
Q

what to not touch with contaminated gloves

A

charts, unwrapped pens, xray cups, lead apron

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9
Q

should each film be dried with paper towel after exposure?

A

yes, minimizes saliva contamination

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10
Q

tubehead away from wall means

A

dirty

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11
Q

tubehead close to wall

A

clean

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12
Q

which way to take bitewings

A

from right to left

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13
Q

if xray beam is not perpendicular to the line connecting the buccal surfaces of the teeth, overlap between the ___ surface of one tooth and the _____ surface of the adjacent tooth occurs

A

buccal; lingual—– incorrect horizontal angulation

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14
Q

which side of the film should face the teeth?

A

the all white side should face the teeth/ring

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15
Q

when using stick-on tabs for bitewings, the tabs should be placed on the what side

A

all white side

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16
Q

what is it called when the film is reversed and tire tracks form

A

herring bone effect

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17
Q

caused by inadvertently using the same film to expose two different areas of the mouth

A

double exposure

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18
Q

will slight movement of tubehead affect the images on the film

A

no

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19
Q

excessive film softening is what lines

A

black lines

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20
Q

____ percent of the x ray photons should penetrate through a standardized thickness of a given material depending on KVP

A

50%

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21
Q

if < 70 kvp

A

50% must pass through 1.5 mm aluminum

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22
Q

if > 70 kvp

A

50% must pass through 2.5 mm aluminum

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23
Q

what do you use to test output consistency of x ray machine

A

step wedge device (place step wedge on fresh film)

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24
Q

what is a positive step wedge test

A

steps dont line up

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25
Q

for x ray machines, how many impulses per 1 seconds

A

60 impulses

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26
Q

correct position of tube head when not in use

A

extension arm folded, tube head and pid aimed at the floor

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27
Q

best test to test safelight

A

coin test

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28
Q

what happens if there is an outline when process film with coin test

A

safelight may not be safe

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29
Q

what to do for safelight test

A

turn off lights and unwrap unexposed dental film
place coin on film. turn safelight on
process film, if positive exposure–outline– safelight may not be safe

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30
Q

unexposed film is what color

A

clear and dry

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31
Q

exposed film is what color

A

black and dry

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32
Q

screen film contact test tools

A

meshes for checks of the contact between film and screen of x ray film cassettes

33
Q

fresh film will be

A

clear with a slight blue tint

34
Q

unfresh film

A

foggy

35
Q

when developer loses strength, films will

A

lighten

36
Q

what is the normalizing device called

A

dental radiographic quality control device

37
Q

fresh fixer clears in how many min

A

2-3

38
Q

if clearing time of fixer is over 4 minutes-

A

replace fixer

39
Q

the occlusal plane between the maxillary and mandibular teeth have a distinct upward curve

A

curve of spee

40
Q

compact and dense bone that lines outisde layers of the maxilla and mandible

A

cortical bone

41
Q

spongy bone, forms bulk of inner bone

A

cancellous bone

42
Q

bars or plates of bone; form multitude of various-sized compartments; usually filled with fat, blood, or bone cells

A

trabeculae

43
Q

hard, cortical bone that lines the alveolus(tooth socket)

A

lamina dura

44
Q

portion of maxilla and mandible that surrounds and supports the teeth; composed of a base of supporting cancellous bone and lamina dura

A

alveolar process

45
Q

teeth are attached to lamina dura by fibers of pdl; space in which the pdl lies is often visible radiographically as a thin radiolucent border between lamina dura and roots of teeth

A

pdl space

46
Q

what makes up the inverted y

A

max sinus and nasal fossa

47
Q

is acrylic most or least dense

A

least

48
Q

radiopaque areas are actually where the xrays did___ hit

A

not

49
Q

extensions of amalgams beyond the crown portion in interproximal area

A

amalgam overhangs

50
Q

do not cover cusps

A

inlays

51
Q

cover at least one cusp

A

onlays

52
Q

prefabricated, not custom-made; temporary restorations; see through margin

A

stainless steel crowns

53
Q

extends into the pulp canal

A

post

54
Q

resembles a portion of the crown; will serve as coronal tooth structure so crown can be cemented on it

A

core

55
Q

where will you generally see all porcelain crowns

A

on anterior teeth; not as strong as pfm

56
Q

cavity liners that protect the pulp of the tooth; after this a permanent material is placed over this; radiopaque but less dense than amalgam

A

base materials

57
Q

screws that aid in the retention of an amalgam; metal and opaque; can weaken or fracture a tooth it is trying to help

A

metallic pins

58
Q

clay like material that fills up the pulp canals; slightly radiopaque

A

gutta percha

59
Q

metal, more opaque than gutta percha

A

silver points

60
Q

surgery performed at apical portion of root

A

apicoectomy

61
Q

base of denture is made of

A

acrylic

62
Q

teeth of denture is made of

A

porcelain or acrylic

63
Q

anterior porcelain teeth include retention pins called

A

diatorics

64
Q

artifacts caused by a radiodense object such as earring

A

ghost images

65
Q

ghost images appear ___ on the ____ side, and ____ than the real image

A

larger; opposite; higher

66
Q

in order to determine the location of superimposed dental structures, two radiographs need to be exposed utilizing two different___ angulations

A

horizontal

67
Q

two different films will be needed to see if the foreign objects are situated ___ or ____

A

buccally or lingually; buccal object rule

68
Q

if the object on the second radiograph appears to have moved in the same direction as the shift of the tube, then the objects in question is located on the ____ aspect

A

lingual

69
Q

buccal object rule

A

slob- same lingual opposite buccal

70
Q

achieved by directing central rays of the x ray beam perpendicularly toward the surface of the image receptor in horizontal plane; directing central rays perp through mean tangent of the embasures between teeth of interest

A

horizontal angulation

71
Q

achieved by directing the central rays of the x ray beam perpendicularly toward the surface of the image receptor in a vertical plane

A

vertical angulation

72
Q

all deviations in which the PID is tilted downward to direct the x rays toward the floor; exposure of bw and max PA’s

A

positive vert angulation

73
Q

all deviations in which the PID is tipped upward to direct the xrays toward the ceiling; mandibular PA’s

A

negative vert angulation

74
Q

long biteblock area for the purpose of achieving a parallel relationship between the recording plan of image receptor and long axes of teeth; L shaped backing

A

paralleling technique

75
Q

metallic restorations

A

amalgam and gold

76
Q

nonmetallic restorations

A

porcelain, composite, acrylic

77
Q

bulky amalgams contribute to what kind of disease

A

periodontal disease

78
Q

post and cores are ___ metal and _____

A

cast metal and radiopaque

79
Q

post and cores are only placed in _____ treated teeth

A

endodontically treated teeth

radiology dhyg 3027 (8 decks)

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