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Anatomy Lab > Dental Radiography Board Exam > Flashcards

Dental Radiography Board Exam Flashcards

1
Q

Which of the following statements is/are true of wavelength in reference to radiation?
a. X-rays with longer wavelength have less penetrating power
b. X-rays with longer wavelength have more penetrating power
c. X-rays with longer wavelength are more likely to be absorbed by matter
d. Both a and c

A

D

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2
Q

The kVp represents:
a. The mean X-ray tube voltage
b. The mean filament voltage
c. The maximum or peak voltage of an alternating current
d. The maximum or peak voltage of a direct current

A

C

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3
Q

Exposure time is measured in:
a. kVp
b. Milliamperage
c. Density
d. Impulses

A

D

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4
Q

The quantity of the x-rays produced is controlled by:
a. Voltage
b. Kilovoltage
c. Kilovoltage peak
d. Milliamperage

A

D

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5
Q

Milliamperage regulates the _______ of electrons produced at the cathode filament.
a. Quality
b. Quantity
c. Speed
d. Power

A

B

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6
Q

In regard to increasing density:
a. An increase in either kVp or mA will increase density.
b. An increase in kVp will increase density, but an increase in mA will not increase density.
c. An increase in mA will increase density, but an increase in kVp will not increase density.
d. Neither an increase in kVp nor an increase in mA will increase density.

A

A

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7
Q

Which of the following changes will increase x-ray beam intensity?
a. Decreasing the kilo voltage peak
b. Decreasing the milliamperage
c. Decreasing the exposure time
d. Decreasing the source-to-film distance

A

D

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8
Q

Aluminum filters are used to remove _____-energy, _____-wavelength x-rays.
a. low; longer
b. high; longer
c. low; shorter
d. high; shorter

A

A

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9
Q

(#1) All ionizing radiations are harmful and produce biologic changes in living tissue. (#2) The amount of radiation used in dental radiography is small, but biologic damage does occur.
a. Both statements are true
b. Both statements are false
c. The first statement is true; the second statement is false
d. The first statement is false; the second statement is true

A

A

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10
Q

______ refers to the quantity of radiation received or the total amount of radiation energy absorbed.
a. Total Dose
b. Dose rate
c. Amount of tissue irradiated
d. Cell sensitivity

A

A

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11
Q

Which of the following statements is true of somatic effects of irradiation?
a. Changes are not transmitted to future generations.
b. Changes are in the genetic cells of the individual.
c. Mutations occur that affect the health of offspring.
d. Damage cannot be repaired.

A

A

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12
Q

Critical organs exposed during dental radiographic procedures in the head and neck region include (1) skin, (2) thyroid gland, (3) lens of the eye, and (4) bone marrow.
a. 1,2,3,4
b. 1,2,3
c. 1,2,4
d. 2,4

A

A

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13
Q

The traditional unit of dose is called:
a. The roentgen (R)
b. The radiation absorbed dose (rad)
c. The roentgen equivalent in man (rem)
d. The gray (Gy)

A

B

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14
Q

Added filtration in the dental x-ray tubehead:
a. Refers to the placement of tungsten discs in the path of the x-ray beam between the collimator and the tube head seal.
b. Filters out shorter-wavelength x-rays from the x-ray beam.
c. Results in a lower-energy beam.
d. Results in a more penetrating useful beam.

A

D

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15
Q

The collimator:
a. Is always round.
b. Restricts the size and shape of the x-ray beam.
c. Is a solid piece of aluminum.
d. Is fitted within the copper stem beneath the molybdenum cup.

A

B

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16
Q

A rectangular collimator:
a. Restricts the beam more than a circular collimator
b. Restricts the beam less than a circular collimator.
c. Significantly reduces patient exposure.
d. Both a and c

A

D

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17
Q

The lead apron:
a. Is recommended for intraoral films.
b. Is not recommended for intraoral films.
c. Is an option; use is not mandated by any state or federal law.
d. Is used to protect the thyroid gland.

A

A

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18
Q

Radiation monitoring can be used to protect the dental radiographer and includes monitoring of:
a. Equipment
b. Personnel
c. Both equipment and personnel
d. Drywall for residual radiation

A

C

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19
Q

According to the current recommendations (2003) of the National Council on Radiation Protection and Measurements, the current MPD for occupationally exposed persons is ____/year.
a. 500 millirem
b. 5.0 rem
c. 50 rem
d. 5000 rem

A

B

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20
Q

The acronym for the permitted lifetime accumulated dose is:
a. MPD–maximum permissible dose
b. MPD–maximum possible dose
c. MAD–maximum accumulated dose
d. MAD–maximum allowed dose

A

C

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21
Q

The ALARA concept states that all radiation must be kept:
a. As long as as readily achievable.
b. As low as reasonably allowable.
c. As low as reasonably achievable.
d. As long as reliably achievable.

A

C

22
Q

The _____ activate(s) the machine to produce x-rays.
a. On-off switch
b. Exposure button
c. Exposure light
d. Control devices

A

B

23
Q

The _____ eliminates the need for the patient to stabilize the film.
a. PID (position-indicating device)
b. Film holder
c. Control panel
d. Beam alignment device

A

B

24
Q

A beam alignment device can be used to help the dental radiographer position the PID in relation to the _____ and film.
a. Control panel
b. Extension arm
c. Collimator
d. Tooth

A

D

25
Q

Which of the following areas would appear the most radiolucent on a dental radiograph?
a. Composite
b. Amalgam
c. Air space
d. Enamel

A

C

26
Q

Radiolucent refers to that portion of a processed radiograph that is:
a. Black
b. White
c. Gray
d. Coated with an emulsion

A

A

27
Q

Radiopaque refers to that portion of a processed radiograph that is:
a. Black
b. White
c. Gray
d. Within the plastic base

A

B

28
Q

A radiograph that has _____ is said to have low contrast.
a. A very dark overall appearance
b. A very light overall appearance
c. Many shades of gray
d. Very dark areas and very light areas

A

C

29
Q

If informed consent is not obtained from a patient before the exposure of dental radiographs, a patient may legally claim:
a. Negligence
b. Malpractice
c. Malpractice or negligence
d. Disclosure

A

C

30
Q

Which of the following statements is true of radiographs and the patient’s dental record?
a. Radiographs may be discarded when outdated.
b. It is advised to keep patient radiographs in a file separate from patient charts.
c. The dental record must include documentation of the number and type of radiographs exposed.
d. Dental radiographs are optional rather than integral part of the dental record.

A

C

31
Q

Radiographs are the property of the dentist:
a. Unless they were paid for by the patient.
b. Unless they were paid for by the insurance company.
c. Only if the patient has signed a waiver.
d. Period.

A

D

32
Q

The _____ intraoral radiographic examination is used to examine the entire tooth (crown and root) and supporting bone.
a. Periapical
b. Interproximal
c. Occlusal
d. Panoramic

A

A

33
Q

Which technique examines the crowns of both maxillary and mandibular teeth on a single film?
a. Periapical paralleling technique
b. Periapical bisecting technique
c. Occlusal technique
d. Interproximal examination

A

D

34
Q

The CMRS is defined as a series of intraoral dental radiographs that shows:
a. All of the dentulous tooth-bearing areas of the upper and lower jaws.
b. All of the edentulous tooth-bearing areas of the upper and lower jaws.
c. All of the dentulous or edentulous tooth-bearing areas of the upper and lower jaws.
d. All of the dentulous tooth-bearing areas of the upper and lower jaws that can be verified clinically.

A

C

35
Q

According to the basic principles of the paralleling technique, the film is placed in the mouth _____ to the long axis of the tooth being radiographed, and the central ray of the x-ray beam is directed _____ to the film and long axis of the tooth.
a. Parallel; perpendicular
b. Parallel; parallel
c. Perpendicular; parallel
d. Perpendicular; perpendicular

A

A

36
Q

An unexposed film appears:
a. Clear
b. Black
c. Dark
d. Light

A

A

37
Q

Which of the following choices may be the cause of an unexposed film?
a. Excessive exposure film
b. Failure to turn on the x-ray machine
c. Excessive kilovoltage
d. Excessive milliamperage

A

B

38
Q

To correct a film where apices do not appear:
a. Make certain that no more than 3/4 inch of the film edge extends beyond the incisal-occlusal surfaces of the teeth.
b. Make certain that no more than 1/8 inch of the film edge extends beyond the incisal-occlusal surfaces of the teeth.
c. Increase the exposure time.
d. Direct the x-ray beam through the interproximal spaces.

A

B

39
Q

When the occlusal plane appears tipped or tilted, the error is a(n):
a. Incorrect horizontal angulation.
b. Incorrect vertical angulation.
c. Dropped film corner.
d. Elongated image.

A

C

40
Q

To prevent a dropped film corner:
a. Change the horizontal angulation.
b. Increase the vertical angulation.
c. Decrease the vertical angulation.
d. Make certain the edge of the film is placed parallel to the incisal-occlusal surfaces of the teeth.

A

D

41
Q

When overlapped contacts appear on film, the cause is:
a. Incorrect vertical angulation.
b. Incorrect horizontal angulation.
c. A dropped receptor corner.
d. An underexposed film.

A

B

42
Q

Short teeth with blunted roots appear on the film when:
a. The vertical angulation is excessive.
b. The vertical angulation is insufficient.
c. The horizontal angulation is incorrect.
d. There is a cone-cut.

A

A

43
Q

Long, distorted teeth appear on the film when:
a. The vertical angulation is excessive.
b. The vertical angulation is insufficient.
c. The horizontal angulation is incorrect.
d. There is a cone-cut.

A

B

44
Q

A cone-cut occurs when:
a. The film is underexposed.
b. The film is overexposed.
c. The PID was not properly aligned with the periapical film holder.
d. The exposure burrow was not depressed for a sufficient amount of time.

A

C

45
Q

When the distal surfaces of the canines are not visible on a premolar bite-wing film, the solution is to:
a. Change the horizontal angulation of the tubehead.
b. Increase the vertical angulation of the tubehead.
c. Decrease the vertical angulation of the tubehead.
d. Position the anterior edge of the film at the midline of the mandibular canine.

A

D

46
Q

What is the cause of a double exposure?
a. The patient moved during the film exposure.
b. Two radiographs were stuck together during film exposure.
c. A double packet of film was used.
d. The film was exposed in the patient’s mouth twice.

A

D

47
Q

_____ bone appears predominantly radiopaque, and _____ bone appears predominantly radiolucent.
a. Cortical; cancellous
b. Cancellous; cortical
c. Trabecular; compact
d. Spongy; cortical

A

A

48
Q

Which of the following tooth structures is most radiopaque?
a. Enamel
b. Dentin
c. Cementum
d. Pulp

A

A

49
Q

Which of the following tooth structures is most radiolucent?
a. Enamel
b. Dentin
c. Cementum
d. Pulp

A

D

50
Q

Although all members of the dental team may interpret dental radiographs, it is the responsibility of the _____ to establish a final or definitive interpretation and diagnosis.
a. Dentist or dental hygienist
b. Dentist or dental assistant
c. Dental hygienist or dental assistant
d. Dentist

A

D

Anatomy Lab (3 decks)

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