Dental Radiology Trivia Questions

23 Questions | Total Attempts: 486

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Dental Radiology Quizzes & Trivia

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Questions and Answers
  • 1. 
    The harmful effects of radiation on human tissues are
    • A. 

      Immediately exhibited

    • B. 

      Insignificant

    • C. 

      Usually acute

    • D. 

      Cumulative

    • E. 

      Painful

  • 2. 
    The protective lead apron must be impregnated with how much lead?
    • A. 

      0.20 mm

    • B. 

      0.22 mm

    • C. 

      0.25 mm

    • D. 

      0.30 mm

    • E. 

      0.35 mm

  • 3. 
    You have a patient who had read articles describing the hazards of medical/dental radiation and is not sure about letting you take X-rays on her. Based on what you now know, how could you explain the procedures in a way that would be reassuring?
    • A. 

      You are using a lead apron and lead thyroid shield.

    • B. 

      You are using the long cone paralleling technique.

    • C. 

      You take radiographs only when a need is indicated by clinical examination, not nased on an arbitrary time schedule.

    • D. 

      Both a and b

    • E. 

      All of the above

  • 4. 
    What do filters do in the X-ray beam?
    • A. 

      Increase density and short waves

    • B. 

      Reduce density

    • C. 

      Reduce exposure time

    • D. 

      Correct the size of the beam

    • E. 

      Reduce patient radiation dose and remove the long waves

  • 5. 
    The X-ray photons generated by the dental X-ray machine have
    • A. 

      The same energy and wavelengths.

    • B. 

      Many different wavelengths

    • C. 

      Only a few energies capable of penetrating dense tissue

    • D. 

      Many different speeds

    • E. 

      None of the above

  • 6. 
    What is the recommened collimation of the radiation beam at the patient's skin surface?
    • A. 

      1.5 inches

    • B. 

      2.75 inches

    • C. 

      3.75 inches

    • D. 

      2.75 cm

    • E. 

      Both b and d

  • 7. 
    What does the ALARA concept stand for?
    • A. 

      As low as reasonably achievable

    • B. 

      As little as radiation is allowable

    • C. 

      As low as radiation is around

    • D. 

      As long as reasonably allowable

    • E. 

      None of the above

  • 8. 
    Which of the following devices is an example of personnel monitoring? 
    • A. 

      Film badge

    • B. 

      Pocket dosimeter

    • C. 

      Film ring

    • D. 

      Both a and c

    • E. 

      A, b, and c

  • 9. 
    The transfer of energy as it passes through matter is called
    • A. 

      Reproduction

    • B. 

      Cumulative

    • C. 

      Mutation

    • D. 

      Absorption

    • E. 

      Energize

  • 10. 
    What is it called when a lead disc is used for the elimination of the peripheral portion of the X-ray beam?
    • A. 

      Filtration

    • B. 

      Collimation

    • C. 

      Elongation

    • D. 

      Ionization

    • E. 

      Absorption

  • 11. 
    Which molecular changes occur in a living organsim being struck by photons?
    • A. 

      Molecules break into smaller pieces.

    • B. 

      New bonds form within molecules.

    • C. 

      Molecular bonds are disrupted.

    • D. 

      New bonds form between new molecules.

    • E. 

      All of the above

  • 12. 
    What is the correct vertical angulation used when taking a bitewing radiograph?
    • A. 

      0 degrees

    • B. 

      +10 degrees

    • C. 

      -10 degrees

    • D. 

      +30 degrees

    • E. 

      +5 degrees

  • 13. 
    In the bisecting the andle technique, where is the vertical angel of the central beam directed?
    • A. 

      Parallel to the film

    • B. 

      Perpendicular to the line bisecting the angel made by the film and the side of the tounge

    • C. 

      Parallel to the long axis of the tooth

    • D. 

      Perpendicular to the line bisecting the angle made by the long axis of the tooth and the film

    • E. 

      Both b and d

  • 14. 
    What is true of a full-mouth X-ray series?
    • A. 

      Always has periapical and bitewings

    • B. 

      Has a minimum of 20 films

    • C. 

      Can be replaced by a panoramic film

    • D. 

      Varies in need and number of films according to selection criteria and mouth size

    • E. 

      Both a and d

  • 15. 
    In dental radiography, what infection control procedures are included?
    • A. 

      Sterilization

    • B. 

      Disinfection

    • C. 

      Anitspetic agents

    • D. 

      Both a and b

    • E. 

      All of the above

  • 16. 
    What is the safest postion for an operator while exposing an intraoral film?
    • A. 

      Behind the head of the X-ray unit

    • B. 

      Behind a lead barrier

    • C. 

      At a 45 degree angle to the opposite side of the patient's head

    • D. 

      Both b and c

    • E. 

      All of the above

  • 17. 
    What does immersing the contaminated exposed film packet in a disinfecting solution do?
    • A. 

      Disinfects it

    • B. 

      Destroys the image

    • C. 

      Takes too long

    • D. 

      Makes the images clearer

    • E. 

      None of the above

  • 18. 
    What nees to happen wheeen exposing a full-mouth set of radiographs?
    • A. 

      The PID need not be covered with a barrier if gloves are worn

    • B. 

      A film dispenser should be used

    • C. 

      Unexpected film should be kept on the counter in the room

    • D. 

      The exposure button should be covered with a plastic barrier

    • E. 

      None of the above

  • 19. 
    Where in the X-ray head does thermionic emission take place?
    • A. 

      Tungsten target

    • B. 

      Tungsten filament

    • C. 

      Step-down transformer

    • D. 

      PID

    • E. 

      Both a and b

  • 20. 
    Which radiographic technique records the most accurate image of crowns, roots, and supporting structures?
    • A. 

      Bitewing film

    • B. 

      Panoramic film

    • C. 

      Periapical film

    • D. 

      Occlusal film

    • E. 

      Extraoral film

  • 21. 
    The bicuspid/premolar bitewing radiograph should be placed to include which of the following anatomic structures? 
    • A. 

      All of the mandibular cuspid

    • B. 

      The distal half of the mandibular cuspid

    • C. 

      The distal half of the maxillary cuspid

    • D. 

      The mesial half of the maxillary first premolar

    • E. 

      The distal half of the mandibular first molar

  • 22. 
    What is the primary diagnotic use of a bitewing radiograph?
    • A. 

      Check for unerupted teeth

    • B. 

      Register the appearance of supporting structures such as bone and soft tissue

    • C. 

      Show a crown preparation, placement, and residual excess cement.

    • D. 

      Check the length of the canal for endodontic procedures.

    • E. 

      Check for interproximal decay and crestal bone levels.

  • 23. 
    The size-1 film would most likely be used to radiograph which of the following areas on an adult patient? 
    • A. 

      Incisors and cuspids

    • B. 

      Maxillary bicuspids

    • C. 

      Mandibular bicuspids if the floor of the mouth is too shallow

    • D. 

      Mandibular bicupids

    • E. 

      Both a and c

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