Question 1

The ______ used in the panoramic x-ray machine tubehead is a lead plate with an opening shaped like a narrow vertical slit.

Accepted Answer

A)  filter
B)  collimator
C)  patient chair
D)  bite blockE) None of the above
F) B) and D)

Question 2

The quality of the panoramic view depends on:

Accepted Answer

A)  how the patient's jaw is positioned within the focal trough.
B)  the size of the patient's jaw.
C)  how closely the patient's jaw conforms to the focal trough.
D)  all of the above.E) A) and D)
F) B) and C)

Question 3

The part of the unit that aligns the patient's teeth as accurately as possible is the:

Accepted Answer

A)  head positioner.
B)  focal trough.
C)  Frankfort plane.
D)  tubehead.E) B) and C)
F) A) and B)

Question 4

Anterior teeth that appear fat are caused by the:

Accepted Answer

A)  patient's teeth positioned too far forward on bite block.
B)  patient's teeth positioned too far back on bite block.
C)  patient not sitting or standing up straight.
D)  chin positioned too low.E) All of the above
F) A) and B)

Question 5

All of the following statements about panoramic imaging are true except:

Accepted Answer

A)  panoramic images are primarily used for locating impacted teeth, lesions in the jaw, and eruption patterns.
B)  with film-based imaging, bitewings need to be taken to detect decay.
C)  digital panoramic unit can show small interproximal carious lesion, eliminating the need to take bitewing images.
D)  the digital panoramic unit uses film that has to be processed.E) C) and D)
F) B) and D)

Question 6

The correct position of the Frankfort plane for a diagnostically correct panoramic image is:

Accepted Answer

A)  parallel to the floor.
B)  perpendicular to the floor.
C)  tipped downward.
D)  tipped upward.E) B) and C)
F) B) and D)

Question 7

All of the following statements about cone beam computed tomography (CBCT) are true except the:

Accepted Answer

A)  software program for the CBCT unit makes it possible to see soft tissue.
B)  images can be sent over the Internet for consultation on cases.
C)  CBCT is a little difficult to learn to use and requires a lot of practice.
D)  CBCT images may be colorized on the computer.E) A) and B)
F) A) and C)

Question 8

The CBCT is useful in helping the dentist:

Accepted Answer

A)  decide the correct placement of implants.
B)  with extractions of impacted teeth.
C)  determine the exact location of the mandibular nerve before surgery.
D)  do all of the above.E) B) and D)
F) A) and C)

Question 9

Each panoramic unit has a(n) ______ that is used to align the patient's teeth as accurately as possible.

Accepted Answer

A)  head position
B)  tubehead
C)  exposure control
D)  power sourceE) A) and B)
F) None of the above

Question 10

Skull radiography is most often used in:

Accepted Answer

A)  endodontics and oral surgery.
B)  oral surgery and orthodontics.
C)  orthodontics and fixed prosthodontics.
D)  prosthodontics and pediatric dentistry.E) All of the above
F) C) and D)

Question 11

To avoid a lead apron artifact on a panoramic radiograph:

Accepted Answer

A)  use a lead apron without a thyroid collar.
B)  place the lead apron high around the neck of the patient so that it does not block the x-ray beam.
C)  place the lead apron low around the neck of the patient so that it does not block the x-ray beam.
D)  do both a and cE) A) and D)
F) B) and C)

Question 12

When the patient's jaws are outside the focal trough,the resulting images are:

Accepted Answer

A)  doubled.
B)  ghost images.
C)  distorted.
D)  too light.E) B) and D)
F) B) and C)

Question 13

Computed tomography:

Accepted Answer

A)  is used in dentistry primarily for diagnosing of lesions and planning implant cases.
B)  uses a magnetic field, thereby not exposing the patient to x-radiation.
C)  has long been used in dental radiology and the scanners are common in dental offices.
D)  requires the use of film and processing.E) A) and B)
F) A) and C)

Question 14

Which statement is true of a grid?

Accepted Answer

A)  The grid is placed between the patient's head and the film.
B)  A grid allows passage of the x-ray beam.
C)  Scatter radiation is absorbed by the lead strips on the grid, reducing film fog.
D)  All of the above are true statements.E) A) and B)
F) All of the above

Question 15

Advantages of panoramic imaging include which of the following?

Accepted Answer

A)  The entire maxilla and mandible are seen on one image.
B)  It is easy and quick to learn how to expose a panoramic image.
C)  Patients prefer panoramic images and are exposed to less radiation.
D)  All of the above are advantages.E) None of the above
F) C) and D)

Question 16

The focal trough is an imaginary three-dimensional curved area or space that bears the same shape as a:

Accepted Answer

A)  gutter.
B)  bowling pin.
C)  horseshoe.
D)  baseball diamond.E) C) and D)
F) B) and C)

Exam 42: Extraoral Imaging

Each panoramic unit has a(n) ______ that is used to align the patient's teeth as accurately as possible.

Correct Answer
verified

Anterior teeth that appear fat are caused by the:

Correct Answer
verified

When the patient's jaws are outside the focal trough,the resulting images are:

Correct Answer
verified

The part of the unit that aligns the patient's teeth as accurately as possible is the:

Correct Answer
verified

Computed tomography:

Correct Answer
verified

The CBCT is useful in helping the dentist:

Correct Answer
verified

Which statement is true of a grid?

Correct Answer
verified

All of the following statements about cone beam computed tomography (CBCT) are true except the:

Correct Answer
verified

To avoid a lead apron artifact on a panoramic radiograph:

Correct Answer
verified

The focal trough is an imaginary three-dimensional curved area or space that bears the same shape as a:

Correct Answer
verified

The ______ used in the panoramic x-ray machine tubehead is a lead plate with an opening shaped like a narrow vertical slit.

Correct Answer
verified

The correct position of the Frankfort plane for a diagnostically correct panoramic image is:

Correct Answer
verified

Skull radiography is most often used in:

Correct Answer
verified

The quality of the panoramic view depends on:

Correct Answer
verified

All of the following statements about panoramic imaging are true except:

Correct Answer
verified

Advantages of panoramic imaging include which of the following?

Correct Answer
verified

Exam 42: Extraoral Imaging

Each panoramic unit has a(n) ______ that is used to align the patient's teeth as accurately as possible.

Correct AnswerverifiedShow Answer

Anterior teeth that appear fat are caused by the:

Correct AnswerverifiedShow Answer

When the patient's jaws are outside the focal trough,the resulting images are:

Correct AnswerverifiedShow Answer

The part of the unit that aligns the patient's teeth as accurately as possible is the:

Correct AnswerverifiedShow Answer

Computed tomography:

Correct AnswerverifiedShow Answer

The CBCT is useful in helping the dentist:

Correct AnswerverifiedShow Answer

Which statement is true of a grid?

Correct AnswerverifiedShow Answer

All of the following statements about cone beam computed tomography (CBCT) are true except the:

Correct AnswerverifiedShow Answer

To avoid a lead apron artifact on a panoramic radiograph:

Correct AnswerverifiedShow Answer

The focal trough is an imaginary three-dimensional curved area or space that bears the same shape as a:

Correct AnswerverifiedShow Answer

The ______ used in the panoramic x-ray machine tubehead is a lead plate with an opening shaped like a narrow vertical slit.

Correct AnswerverifiedShow Answer

The correct position of the Frankfort plane for a diagnostically correct panoramic image is:

Correct AnswerverifiedShow Answer

Skull radiography is most often used in:

Correct AnswerverifiedShow Answer

The quality of the panoramic view depends on:

Correct AnswerverifiedShow Answer

All of the following statements about panoramic imaging are true except:

Correct AnswerverifiedShow Answer

Advantages of panoramic imaging include which of the following?

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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