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Dentistry > Radio Exam 2 > Flashcards

Radio Exam 2 Flashcards

1
Q

Calibration of dental X-ray equipment can be performed by a dentist, hygienist or assistant

A

Flash

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2
Q

Annual tests for dental X-ray machines can be performed by a dentist, hygienist, or assistant

A

True

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3
Q

For quality control purposes, each new box of unopened film should be tested for film freshness and fogging before use

A

True

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4
Q

After processing, fresh film that has been properly stored and protected will appear

A

Clear with slight blue tint

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5
Q

After performing the screen film contact test, a wire mesh image of uniform density appears. These results indicate

A

Adequate film-screen contact

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6
Q

When functioning properly, a viewbox should emit a uniform and intense light

A

False

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7
Q

One of the most critical areas of quality control that requires daily monitoring is

A

Processing of film

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8
Q

The coin test is used to check

A

Proper safelighting

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9
Q

The following must be closely monitored with manual processing techniques

A

Temp of water bath, levels of processing solution, accuracy of timer/thermometer

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10
Q

On the average, processing solutions should be changed

A

Every 3 to 4 weeks

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11
Q

On the average, processing solutions should be replenished

A

Once daily

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12
Q

Fresh films and fresh chemicals must be used when preparing reference radiographs

A

True

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13
Q

A reference radiograph is used to check

A

Strength of the developer solution

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14
Q

The densities seen on the daily image appear lighter than the densities seen on the reference radiograph; this result indicates that

A

The developer solution is too weak/too cold

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15
Q

The clearing test is used to monitor

A

Fixer strength

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16
Q

Regardless of who actually exposes the patient to radiation, the dentist is ultimately responsible for the diagnostic quality of all dental images

A

True

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17
Q

What happens to image when the object-receptor distance is increased

A

Image magnification and loss of definition

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18
Q

What piece of equipment is required to hold the receptor parallel to the long axis of the tooth

A

Film holder

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19
Q

What do the letters X,C,P refer to

A

X=extension C=cone (PID) P=paralleling

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20
Q

What size receptor is typically used with the anterior RINN XCP instrument

A

Size 1 (in book)OCC/offices size 2

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21
Q

What size receptor is used for posterior RINN XCP instrument

A

Size 2

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22
Q

Which beam alignment devices are recommended for use with paralleling tech to reduce radiation exposure

A

Precision film holders RINN XCP instruments with snap on rings

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23
Q

How is patients head positioned before exposing receptors

A

Maxillary arch parallel to floor and midline perpendicular to the floor

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24
Q

Why is increased target receptor distance required in the paralleling tech

A

To avoid image magnification

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25
Q

Which describes the relationship of the central ray to the receptor in the paralleling tech

A

90 degrees to the receptor and long axis of the tooth

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26
Q

Right angle

A

Formed by two perpendicular lines

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27
Q

Which describes the relationship between the receptor and that long axis of the tooth with paralleling tech

A

Receptor and tooth are parallel to each other

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28
Q

What describes the distance between the receptor and the tooth in parallel tech

A

Receptor placed away from tooth and toward middle of oral cavity

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29
Q

What are advantages of paralleling tech

A

Increased accuracy, simplicity of use, ease of duplication

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30
Q

Advantages of paralleling outweigh disadvantages

A

True

31
Q

If the lack of parallelism is less than ______ the image is generally acceptable

A

20

32
Q

What happens to dental image when a short PID is used

A

Magnification

33
Q

Which size receptor used with bisecting tech

A

1 or 2

34
Q

Which beam alignment device recommended for bisecting tech because it aids in alignment of PID and reduces exposure

A

RINN BAI instruments

35
Q

Proper direction of central ray in bisecting tech

A

90 degrees to imaginary bisector

36
Q

Distance between receptor and tooth in bisecting tech

A

Receptor placed as close as possible to tooth

37
Q

Advantage of bisecting tech

A

Shorter exposure time

38
Q

Disadvantages of bisecting outweigh advantages

A

True

39
Q

Anatomic order refers to how teeth are arranged in dental arches

A

True

40
Q

A clear film mount is preferred for better interpretation of radiographs

A

False

41
Q

Only the dentist is qualified to mount dental radiographs

A

False

42
Q

Films may be mounted at any time after processing

A

False

43
Q

Film viewing refers to the placing of films in a supporting structure

A

False

44
Q

If viewbox screen is not completely covered by the mounted radiographs, the harsh light around the mounted films must be masked to reduce glare and for better interpretation

A

True

45
Q

Optimal viewing conditions are typically present in the dental setting

A

False

46
Q

Rule of isometry

A

Central ray hits receptor to make 90 degree angle with bisector

47
Q

Elongation

A

Too little/flat angulation

48
Q

Foreshortening

A

Too much/steep angulation

49
Q

To conduct the film-screen contact test,the PID should have a _____-inch target-film distance

A

40

50
Q

Areas of poor film-screen contact appear darker than good contact areas

A

True

51
Q

To conduct the coin test, the film and coin are exposed for

A

3-4 minutes

52
Q

How to test automatic film processor

A

Unwrap two unexposed films, expose one to light, and then process both film in the automatic processor

53
Q

A reference radiograph is compared with a radiograph taken each day for matched

A

Density

54
Q

When the stepwedge tech is used to evaluate developer strength, if density on the daily radiograph differs from that on the standard radiograph by more than ____ steps, the developer solution is depleted

A

2

55
Q

The clearing test is used to monitor

A

Fixer strength

56
Q

Incisive foramen maxilla anterior

A

Radiolucent

57
Q

Anterior border of maxillary

A

Radiopaque

58
Q

Nasal septum maxilla anterior

A

Radiopaque

59
Q

Soft tissue of nose maxilla anterior

A

Radiopaque

60
Q

Maxillary sinus maxilla posterior

A

Radiolucent

61
Q

Maxillary tuberosity maxilla posterior

A

Radiopaque

62
Q

Lingual foramen anterior mandible

A

Radiolucent

63
Q

Mental foramen posterior mandible

A

Radiolucent

64
Q

Denton and decay are

A

Radiolucent

65
Q

Enamel is

A

Radiopaque

66
Q

Posterior indicator arm

A

2 curves in metal

67
Q

Anterior ring

A

Extension located off to the side rather than straight

68
Q

Steps for fresh film test

A

Prepare the film by unwrapping unexposed film, process film. If clear then good if foggy may be expired

69
Q

Safelight coin test

A

Prep the darkroom turn off all lights in darkroom, prep film unwrap and place 4 feet from safelight place coin on top, turn on safelight and expose for 3-4 minutes, process film

70
Q

Clearing test steps

A

Unwrap and place immediately in fixer, measure time takes film to clear if fast fixer is right strength

71
Q

Rules for paralleling tech

A

Receptor placement, receptor position, vertical angulation, horizontal angulation, receptor exposure

72
Q

Radiopaque

A

Can’t see through

73
Q

Radiolucent

A

Can see through

Dentistry (63 decks)

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