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Dental Assisting > Radiology > Flashcards

Radiology Flashcards

1
Q

Paralleling technique requires the film be placed
A. Away from the tooth, toward the middle of the oral cavity
B. Against the occupation surface of the tooth
C. Against the lingual surface of the tooth
D. Toward the tooth, away from the oral cavity

A

A. Away from the tooth, toward the middle of the oral cavity

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2
Q 
How frequently should processing solutions be replenished?
A. Daily
B. Weekly
C. As needed
D. Monthly
A

A. Daily

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3
Q 
Maximum wattage for a safelight should be
A. 60
B. 7
C.30
D. 15
A

D. 15

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4
Q 
Dental Healthcare personnel can best shield themselves from radiation during patient exposure by standing behind
A. The patient's chair 
B. A glass window 
C. The tubehead
D. A drywall barrier
A

D. A drywall barrier

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5
Q 
The endentulous radiographic series may include all of the following except
A. Periapicals
B. Panoramic
C. Bitewings 
D. Occlusals
A

C. Bitewings

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6
Q

Which of the following may cause unnecessary radiation exposure to the patient?
A. Standard radiographs during exam appointment
B. Endodontic radiographs
C. Standard radiographs during recall appointment
D. Radiograph technique errors

A

D. Radiography technique errors

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7
Q 
On a full mouth series with with 18 films, how many anterior films are exposed?
A. 7
B. 5
C. 8
D. 6
A

D. 6

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8
Q

Which of the following could cause a straight black line/border to appear on a radiograph?
A. Developer solution was set at a low temperature
B. Developer solution level was low
C. Fixer solution was set at a high temperature
D. Fixer solution level was low

A

D. Fixer solution level was low

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9
Q

To maintain quality assurance while procession films, dental assistants should record
A. The date solutions were changed
B. Patient exposures in a daily log
C. Names of the dental assistants using the developing room
D. The date processing solutions were purchased

A

A. The date solutions are changed

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10
Q 
To view an abscess on tooth #25, the best radiographic exposure is a
A. Bitewing
B. Periapical 
C. Panoramic 
D. Occlusal
A

Periapical

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11
Q

Processing tanks should be cleaned when the…

A

Solutions are changed

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12
Q

Which of the following affects the quantity of x-rays being emmited from the tube head?

A

mA

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13
Q

Which of the following is a measurement of tissue damage from x-ray energy?

A

Radiation absorbed dose

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14
Q

ALARA is primarily concerned with the radiation that is

A

Artificial

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15
Q

Which of the following should be used to prevent cross-contamimation from exposure buttons?

A

Plastic cover

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16
Q

The most commonly used radiographic exposure for a 3 year old patient is?

A

Bitewing

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17
Q

The best way to correct conecutting error is to adjust

A

Film postion

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18
Q

Blurred radiographic images are often caused by

A

Patient movement during exposure

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19
Q

The time between patient exposure to radiation and the appearance of biological damage is th

A

Latent period

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20
Q

When using a 16 inch PID compared to an 8 inch PID the exposure time must

A

Be increased

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21
Q

Which of the following landmarks is useful when mounting films of the mandibular posterior area?

A

Mental foramen

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22
Q

Long term effects of exposure to radiation may be associated with

A

Birth abnormalities

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23
Q

When changing the 8 inch PID to a 16 inch PID, which of the following is used to determine the intensity of the beam?

A

Inverse square law

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24
Q

The optimum developing solution temperature for manual processing is

A

68 degrees

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25
Q

Which of the following would cause elongation on a radiograph?

A

Insufficient vertical angulation

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26
Q

Which of the following helps to decrease exposure of the thyroid gland from the primary radiation beam?

A

Paralleling technique

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27
Q

Using the ALARA concept as a guideline for radiographs includes all of the following except

A

Using a circular PID

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28
Q

Which of the following best describes the action of the developer solution?

A

Converts exposed silver halide crystals

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29
Q

In dental radiology, the purpose of the fixer solution is to

A

Remove unexposed silver halide crystals

30
Q

The most common reason for taking biyewing radiographs is to evaluate

A

Interproximal caries

31
Q

The main purpose of using a lead apron with a thyroid collar when exposing dental radiographs is to protect the patient from

A

Scatter radiation

32
Q

Most bilateral findings in radiographs are considered

A

Normal anatomic landmarks

33
Q

The primary purpose of the bitewing radiograph is to evaluate

A

Interproximal decay

34
Q

The best way to prevent cross contamination form an exposed film packet is by

A

Using individual barrier envelopes

35
Q

Storing unexposed radiographs film in high humidity conditions may cause

A

Film fog

36
Q

Radiation injury can be measured by

A

Dose rate

37
Q

What size film is most effective, when placed vertically in the anterior region, to evaluate caries and periodontal health?

A

2

38
Q

What is the primary advantage in using digital radiography?

A

Reduces the radiation to patient

39
Q

On a radiograph, the anterior alveolar crest normally appears

A

Pointed and sharp

40
Q

Film should be stored in

A

It’s original lead wrapped packaging

41
Q

Which of the following is most likely to cause a stored radiograph to turn brown over time?

A

Underwashing

42
Q

Which of the following affects the speed of the electrons emitted from the tubehead?

A

kVp

43
Q

Radiation Injury results from

A

Exposure

44
Q

Dental Healthcare personnel who are pregnant can expose radiographs during the

A

Entire pregnancy

45
Q

Which of the following radiolucent landmarks is useful when mounting films in the mandibular anterior area?

A

Lingual foramen

46
Q

According to the inverse square law, when changing the PID length from 8 to 16 inches, the beam’s intensity is

A

1/4 ad intense

47
Q

Patients should wear a thyroid collar during which type of radiographic exposure?

A

Intraoral radiograph

48
Q

Personnel radiation monitoring devices are worn to

A

Record the occupational exposure received by the operator

49
Q

The most common radiographic exposure used to detect periodontal disease is a

A

Periapical

50
Q

Emulsion damage to a film is caused by

A

Improper handling of the film

51
Q

Which of the following influences the sharpness of a radiograph?

A

Focal spot size

52
Q

Duplication film is coated with

A

One sided emulsion

53
Q

The best way a dental assistant can minimize cross contamination when exposing radiographs is to

A

Touch as few surfaces as possible

54
Q

Which of the following is a disadvantage of panoramic radiograph?

A

High cost of equipment

55
Q

Which of the following increases the dentisty on duplicated film?

A

Decrease the exposure time

56
Q

Which of the following regulates the manufacturing and installation of x-ray equipment?

A

Federal government

57
Q

Which on the following causes the interproximal areas of the teeth to appear overlapped?

A

Improper horizontal angulation

58
Q

The penetrating x-ray beam produced during dental radiography is called

A

Primary radiation

59
Q

On a radiograph, when the contact area of one tooth is superimposed over the contact of another, is called

A

Overlapping

60
Q

The diameter of the cone shaped beam produced from a circular collimator is

A

2.75 inches

61
Q

Developing solutions temperatures should be checked frequently when using

A

Manual processing

62
Q

Which of the following landmarks would be seen in a maximally anterior periapical radiograph?

A

Incisive foramen

63
Q

If there are no teeth to serve as guides, which of the following landmarks indicates a maximally molar area radiograph?

A

Tuberosity

64
Q

Human tissue are mainly composed of

A

Water

65
Q

The most important step the dentist can take in protecting patients from x-radiation is to

A

Properly prescribe radiographs

66
Q

Which of the following radiation effects increase in severity as more radiation is absorbed by somatic cells?

A

Nonstochastic

67
Q

Foreshortening of the mwacillatu radiographic image results from

A

Increased vertical angulation

68
Q

Radiographs appear dark after processing when the developing solution is

A

Too warm

69
Q

Insufficient rinsing of processed radiographic film will result in a

A

Brownish yellow stain in the radiograph

70
Q

The most common radiographic exposure used to evaluate a dental implant on an adult is

A

Periapical

71
Q

Which of the following tissues is the most highly radiosensitve

A

Skin

72
Q

The use of a thyroid is recommended for all of the following radiographic exposure except

A

Panoramic

Dental Assisting (1 decks)

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