Das 135: Intraoral And Extraoral Imaging(chpt.39,40,41,42)

114 Questions  I  By Maurita
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Radiography Quizzes & Trivia
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  • 1. 
    Number 2 film is commonly used for adult bitewing radiographs.
    • A. 

      True

    • B. 

      False


  • 2. 
    Bitewing radiographs are used to show interproximal caries, early periodontal disease, and recurrent decay under restorations.
    • A. 

      True

    • B. 

      False


  • 3. 
    The bisecting technique is preferred because it provides a more accurate image of the teeth.
    • A. 

      True

    • B. 

      False


  • 4. 
    A periapical radiograph pictures the entire tooth and surrounding areas.
    • A. 

      True

    • B. 

      False


  • 5. 
    Occlusal radiographs are used to locate retained roots, supernumerary teeth, salivary stones, and fractures.
    • A. 

      True

    • B. 

      False


  • 6. 
    It is acceptable for the dental assistant to hold a film in the patient's mouth if they are unable to do so.
    • A. 

      True

    • B. 

      False


  • 7. 
    Radiographs on edentulous patients are not necessary.
    • A. 

      True

    • B. 

      False


  • 8. 
    A panoramic radiograph will allow the dentist to view the entire dentition and related structures on one film.
    • A. 

      True

    • B. 

      False


  • 9. 
    A panoramic radiograph does not need any specialized equipment.
    • A. 

      True

    • B. 

      False


  • 10. 
    A patient must remove earrings and eye glasses prior to having a panoramic radiograph taken.
    • A. 

      True

    • B. 

      False


  • 11. 
    If the patient is in a wheelchair, doesn’t have use of his or her upper limbs, and a film sensor holder cannot be used to stabilize the film sensor, you should do which of the following?     
    • A. 

      You may ask the patient's caregiver to assist in holding the film sensor.

    • B. 

      Hold the film sensor in the patient's mouth while you press the exposure button.

    • C. 

      Hold the film sensor in the patient's mouth and ask the caregiver to press the exposure button.

    • D. 

      Turn the wheelchair on its side until gravity holds the film sensor in the proper position.


  • 12. 
    According to the guidelines for film placement, which of the following is true?     
    • A. 

      The colored side of the film always faces the teeth.

    • B. 

      Anterior films are always placed horizontally.

    • C. 

      Posterior periapical films are always placed vertically.

    • D. 

      The identification dot on the film is always placed in the slot of the film holder.


  • 13. 
    The alignment of the x-ray beam in the horizontal and vertical planes formed by the long axis of the teeth and the film sensor placement is referred to as:
    • A. 

      Angulation.

    • B. 

      Interproximal.

    • C. 

      Paralleling.

    • D. 

      Perpendicular.


  • 14. 
    The bisecting-angle instrument (BAI) uses _____ to determine the correct PID angulation.
    • A. 

      Indicator arms

    • B. 

      Bite-blocks

    • C. 

      Aiming rings

    • D. 

      Dental dams


  • 15. 
    When using an x-ray sensor, it is important to always:
    • A. 

      Place a cotton roll between the sensor and the teeth being x-rayed to protect the sensor.

    • B. 

      Use the bisecting technique.

    • C. 

      Place the sensor parallel to the incisal or occlusal edge of the teeth.

    • D. 

      Make sure the sensor is against the teeth being radiographed.


  • 16. 
    In adults, a size #_____ intraoral film is used for the occlusal technique.
    • A. 

      0

    • B. 

      1

    • C. 

      2

    • D. 

      4


  • 17. 
    Horizontal angulation is:
    • A. 

      The side-to-side angulation.

    • B. 

      Different when using the paralleling and bisecting techniques.

    • C. 

      Correct when the central ray is parallel to the curvature of the arch.

    • D. 

      Determined by the Stabe bite-block.


  • 18. 
    Incorrect horizontal angulation of the PID results in:
    • A. 

      Elongation.

    • B. 

      Foreshortening.

    • C. 

      Blurred images.

    • D. 

      Overlapped contact areas.


  • 19. 
    The American Academy of Oral and Maxillofacial Radiology recommends using the paralleling technique because:
    • A. 

      It is an easier technique to use.

    • B. 

      It provides the most accurate image with the least among of radiation exposure.

    • C. 

      The film sensor is placed closer to the teeth therefore reducing the chance of patient gagging.

    • D. 

      Both a and c.


  • 20. 
    The exposure sequence for the posterior teeth should begin with the _____ view.
    • A. 

      Maxillary right premolar

    • B. 

      Maxillary right molar

    • C. 

      Mandibular right premolar

    • D. 

      Mandibular right molar


  • 21. 
    The number of bitewing films needed is based on the curvature of the arch and the:
    • A. 

      Age of the patient.

    • B. 

      Size of the patient's mouth.

    • C. 

      Number of teeth present in the posterior areas.

    • D. 

      Number of periapical x-rays taken.


  • 22. 
    The _____ technique is recommended by the American Academy of Oral and Maxillofacial Radiology and the American Association of Dental Schools, because it provides the most accurate image with the least amount of radiation exposure to the patient.
    • A. 

      Bisecting-angle

    • B. 

      Paralleling

    • C. 

      Bitewing survey

    • D. 

      Short-cone


  • 23. 
    Angulation of the PID is critical to ensure that the central ray is perpendicular to the bisector line in which of the following techniques?
    • A. 

      Long-cone

    • B. 

      Bisecting

    • C. 

      Bitewing

    • D. 

      Both b and c


  • 24. 
    When using a #2 film sensor for anterior views using the paralleling technique, there are _____ anterior images.
    • A. 

      Four

    • B. 

      Six

    • C. 

      Seven

    • D. 

      Eight


  • 25. 
    When taking periapical x-rays, the patient's head is _____ for maxillary films and _____ for the mandibular arch.
    • A. 

      Tilted back slightly; tilted back slightly

    • B. 

      Tilted back slightly; upright

    • C. 

      Upright; tilted back slightly

    • D. 

      Upright; upright


  • 26. 
    The bitewing view shows the:
    • A. 

      The bitewing view shows the:

    • B. 

      Whole tooth crown to apex and surrounding bone.

    • C. 

      Crestal bone.

    • D. 

      Both a and c.


  • 27. 
    What size film sensor is used for the anterior region of the mouth?
    • A. 

      #1

    • B. 

      #2

    • C. 

      #3

    • D. 

      Either A or B


  • 28. 
    Factors that can affect the quality of dental radiographs include:
    • A. 

      Film sensor placement.

    • B. 

      Exposure.

    • C. 

      Processing.

    • D. 

      All the above.


  • 29. 
    Periapical x-rays are essential in which dental specialty?
    • A. 

      Pediatric dentistry

    • B. 

      Endodontics

    • C. 

      Oral surgery

    • D. 

      Both b and c


  • 30. 
    When using a size #1 film sensor for anterior images using the paralleling technique, _____ maxillary and _____ mandibular images are exposed.
    • A. 

      Five; four

    • B. 

      Six; four

    • C. 

      Four; three

    • D. 

      Three; four


  • 31. 
    When taking periapical images, it is best to start with anterior images because:
    • A. 

      They are easier on the operator to take.

    • B. 

      Patients are less likely to gag with anterior film sensor placement.

    • C. 

      Patients can tolerate the film sensor size easier.

    • D. 

      Both b and c.


  • 32. 
    When mounting x-rays, it is important to:
    • A. 

      Know the anatomy of the maxilla and mandible.

    • B. 

      Mount the films in the order of the teeth.

    • C. 

      Label the mount with the patient's name and date before mounting the films.

    • D. 

      All of the above.


  • 33. 
    To correct an elongated image on an x-ray view, the vertical angulation needs to be:
    • A. 

      Increased.

    • B. 

      Decreased.

    • C. 

      Lowered

    • D. 

      Flatened


  • 34. 
    The _____ technique may be used in some situations such as a small mouth, shallow palate, or the presence of tori.
    • A. 

      Paralleling

    • B. 

      Bitewing

    • C. 

      Bisecting

    • D. 

      Long-cone


  • 35. 
    The number of x-ray views that makes a patient's full-mouth series depends on:
    • A. 

      The dentist's preference.

    • B. 

      The number of teeth present in a patients mouth.

    • C. 

      Whether the paralleling or the bisecting technique is used.

    • D. 

      All of the above.


  • 36. 
    The major difference between the paralleling technique and the bisecting technique is film sensor:
    • A. 

      Placement

    • B. 

      Speed

    • C. 

      Size

    • D. 

      None of the above


  • 37. 
    The bitewing view is used for detecting:
    • A. 

      Abscessed teeth.

    • B. 

      Periodontal disease

    • C. 

      Interproximal decay.

    • D. 

      Both b and c.


  • 38. 
    The bisecting technique is used:
    • A. 

      Because it is recommended by the American Academy of Oral and Maxillofacial Radiology.

    • B. 

      Because this technique provides the most accurate image.

    • C. 

      Because it allows the least amount of radiation to be used to produce a quality image.

    • D. 

      When patients have small mouths or low palatal vaults.


  • 39. 
    The American Dental Association recommends that films be mounted:
    • A. 

      With the concave portion of the dot facing up.

    • B. 

      According to the labial mounting method.

    • C. 

      As if the viewer is standing on the patient's tongue.

    • D. 

      So the patient's left side is on the viewer's left side.


  • 40. 
    Radiographic images on an edentulous patient might be required for:
    • A. 

      Detection of interproximal caries.

    • B. 

      Identifying objects embedded in the bone.

    • C. 

      Detecting retained root tips, impacted teeth, and lesions.

    • D. 

      Both b and c.


  • 41. 
    In order to minimize image distortion, the:
    • A. 

      Film must be positioned perpendicular to the long axis of the tooth.

    • B. 

      Film must be positioned parallel to the long axis of the tooth.

    • C. 

      Central ray of the x-ray beam must be directed parallel to the film.

    • D. 

      Central ray of the x-ray beam must be directed parallel to the long axis of the tooth.


  • 42. 
    If the size #2 film sensor is being used, the anterior films are in the ______ position and the posterior films/sensors are in the ______ position.
    • A. 

      Horizontal; horizontal

    • B. 

      Vertical; vertical

    • C. 

      Horizontal; vertical

    • D. 

      Vertical; horizontal


  • 43. 
    For management of the patient with a gag reflex:
    • A. 

      Slide the film sensor along the palate to minimize the possibility of eliciting the gag reflex.

    • B. 

      Position the film sensor slowly.

    • C. 

      If intraoral images are impossible to obtain, you must use extraoral images.

    • D. 

      Radiographic images are not necessary.


  • 44. 
    A periapical view shows the tooth from the occlusal surface or incisal edge to the:
    • A. 

      Crest of alveolar bone.

    • B. 

      Furcation

    • C. 

      Apex of the root.

    • D. 

      Bone about 2 to 3 mm beyond the apex.


  • 45. 
    An intraoral full-mouth survey (FMX) on an adult consists of _____ images.
    • A. 

      18 to 20.

    • B. 

      4.

    • C. 

      10 periapical images and 2 bitewing.

    • D. 

      4 anterior images and 8 posterior.


  • 46. 
    A ghost image will appear _____ than normal and on the _____ side of the image.     
    • A. 

      Larger; opposite

    • B. 

      Larger; same

    • C. 

      Smaller; opposite

    • D. 

      Smaller; same


  • 47. 
    The CBCT is useful in helping the dentist:     
    • 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. 

      All of the above.


  • 48. 
    The main components of the panoramic unit include ________, and exposure controls.     
    • A. 

      X-ray tubehead

    • B. 

      X-ray tubehead, position-indicator device

    • C. 

      X-ray tubehead, head positioner

    • D. 

      Position-indicator device, head positioner


  • 49. 
    The quality of the panoramic view depends on:     
    • 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.


  • 50. 
    The ______ used in the panoramic x-ray machine tubehead is a lead plate with an opening shaped like a narrow vertical slit.     
    • A. 

      Filter

    • B. 

      Collimator

    • C. 

      Patient chair

    • D. 

      Bite block


  • 51. 
    What new feature of the panoramic unit has allowed better resolution to show better details?     
    • A. 

      Cephalostat

    • B. 

      Focal trough

    • C. 

      Digital technology

    • D. 

      Magnetic resonance


  • 52. 
    Advantages of panoramic imaging, when contrasted with intraoral imaging, include:     
    • A. 

      Less radiation exposure.

    • B. 

      No focal trough limitations.

    • C. 

      Lower equipment cost.

    • D. 

      Both a and c.


  • 53. 
    Each panoramic unit has a(n) ______ that is used to align the patient’s teeth as accurately as possible.
    • A. 

      Head positioner

    • B. 

      Tubehead

    • C. 

      Exposure control

    • D. 

      Power source


  • 54. 
    If the patient’s chin is positioned too low during the panoramic exposure:     
    • A. 

      The mandibular incisors will appear blurred.

    • B. 

      The condyles will not be visible.

    • C. 

      Detail in the posterior apical regions will be lost.

    • D. 

      Both a and b.


  • 55. 
    Computed tomography:     
    • 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.


  • 56. 
    Skull radiography is most often used in:     
    • A. 

      Endodontics and oral surgery.

    • B. 

      Oral surgery and orthodontics.

    • C. 

      Orthodontics and fixed prosthodontics.

    • D. 

      Prosthodontics and pediatric dentistry.


  • 57. 
    The cause of a panoramic image that comes out with a radiopaque cone-shaped artifact that interferes with the diagnostic information is the:     
    • A. 

      Patient's chin was too high during the procedure.

    • B. 

      Patient's lead apron was incorrectly placed or a lead apron with a thyroid collar was used.

    • C. 

      Patient's head was posterior to the focal trough.

    • D. 

      Patient moved during the procedure.


  • 58. 
    A patient wearing earrings or glasses must remove them before a panoramic x-ray image exposure; otherwise, a _____ will appear on the image.     
    • A. 

      Dark area

    • B. 

      Blurred area

    • C. 

      Ghost image

    • D. 

      Both b and c


  • 59. 
    How can a lead apron artifact be avoided during exposure of panoramic images?     
    • 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. 

      Both a and c are correct.


  • 60. 
    If the patient’s teeth are not positioned in the groove of the bite-block, the teeth will appear:     
    • A. 

      "fat."

    • B. 

      "skinny"

    • C. 

      "tall"

    • D. 

      "short."


  • 61. 
    If the patient’s chin is too high during the panoramic exposure:     
    • A. 

      The maxillary premolars will be blurred.

    • B. 

      The floor of the nasal cavity will be superimposed over the roots of the mandibular teeth.

    • C. 

      A "reverse smile line" will appear on the radiograph.

    • D. 

      Detail of the mandibular region will be lost.


  • 62. 
    In panoramic imaging, ________ around the patient.     
    • A. 

      The film/sensor rotates

    • B. 

      The tubehead rotates

    • C. 

      Both the film/sensor and the tubehead rotate

    • D. 

      Neither the film/sensor nor the tubehead rotates


  • 63. 
    The exposure controls allow the _____ to be adjusted on the panoramic x-ray unit, to accommodate patients of different sizes.     
    • A. 

      Exposure time

    • B. 

      Vertical angulation

    • C. 

      Horizontal angulation

    • D. 

      Milliamperage and kilovoltage


  • 64. 
    The lead plate in the panoramic tubehead with an opening shaped like a narrow vertical slit is the:     
    • A. 

      Exposure control.

    • B. 

      Cephalostat.

    • C. 

      Focal trough.

    • D. 

      Collimator.


  • 65. 
    Which is not true of the cone beam computed tomography (CBCT)?     
    • A. 

      The software program for the CBCT unit makes it possible to see soft tissue.

    • B. 

      The images can be sent over the Internet for consultation on cases.

    • C. 

      The CBCT is a little difficult to learn to use and requires a lot of practice.

    • D. 

      The CBCT images may be colorized on the computer.


  • 66. 
    Which statement is not true of the panoramic tubehead?     
    • A. 

      The tubehead rotates the film behind the patient's head.

    • B. 

      The tubehead rotates behind the patient's head.

    • C. 

      The vertical angulation of the tubehead is not adjustable.

    • D. 

      The tubehead houses the filament that produces electrons and target that produces radiographs.


  • 67. 
    Which statement is true of a grid?     
    • 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.


  • 68. 
    Which statement is not true concerning panoramic imaging?     
    • 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.


  • 69. 
    A dark radiolucent shadow that obscures the anterior teeth can indicate that the patient’s:
    • A. 

      Chin was too low.

    • B. 

      Head was posterior to the focal trough.

    • C. 

      Lips were not closed on the bite-block during the exposure.

    • D. 

      Tongue was not in contact with the palate during the exposure.


  • 70. 
    If a dark radiolucent shadow obscures the apices of the maxillary teeth, the:
    • A. 

      Patient's lips were not closed on the bite-block during the exposure.

    • B. 

      Patient's tongue was not in contact with the palate during the exposure.

    • C. 

      Patient's head was posterior to the focal trough.

    • D. 

      Patient needed to swallow.


  • 71. 
    Which of these is not an intraoral view?
    • A. 

      Interproximal

    • B. 

      Occlusal

    • C. 

      Panoramic

    • D. 

      Periapical


  • 72. 
    What term describes the imaginary line between the long axis of the tooth and the film plane?
    • A. 

      Tangent

    • B. 

      Median

    • C. 

      Bisector

    • D. 

      Midsagittal


  • 73. 
    A focal spot distance of __________ is advocated in the paralleling technique of intraoral radiography.
    • A. 

      8 inches/20.5 cm or less

    • B. 

      12 inches/30 cm or more

    • C. 

      4 inches or less

    • D. 

      Makes no difference


  • 74. 
    How many standard-sized films are recommended to make a full bitewing survey of the posterior teeth?
    • A. 

      4

    • B. 

      6

    • C. 

      8

    • D. 

      9


  • 75. 
    Which of these factors is most likely to reduce the usefulness of an interproximal radiograph?
    • A. 

      Error in horizontal angulation

    • B. 

      Error in vertical angulation

    • C. 

      Vertical instead of horizontal film placement

    • D. 

      Horizontal instead of vertical film placement


  • 76. 
    What is the approximate vertical angulation for most bitewing radiographic procedures?
    • A. 

      -10 degrees

    • B. 

      0 degrees

    • C. 

      +10 degrees

    • D. 

      +20 degrees


  • 77. 
    In which of these situations is an occlusal survey not indicated?
    • A. 

      To determine the shape of the dental arch

    • B. 

      To locate the position of an impacted canine

    • C. 

      To reveal a fracture

    • D. 

      To reveal the extent of periodontal lesions


  • 78. 
    Which film size is usually required for f full mouth series on a six-year-old patient?
    • A. 

      #1

    • B. 

      #2

    • C. 

      #0

    • D. 

      #3


  • 79. 
    Which of these conditions is most commonly found during a radiographic survey of edentulous ridges?
    • A. 

      Cysts

    • B. 

      Fractures

    • C. 

      Foreign bodies

    • D. 

      Retained root tips


  • 80. 
    Which statement is true of occlusal radiographs?
    • A. 

      Best placement is achieved with a ring-type holder

    • B. 

      Uses include viewing interproximal contacts

    • C. 

      Patients are in a reclining position during exposure

    • D. 

      The maxillary exposure will most likely pass through the bridge of the nose


  • 81. 
    Which of the following are advantages of using a long position indicator device (PID)?
    • A. 

      Enable the x-ray photons to emerge in a straighter line

    • B. 

      Aids in producing a more accurate image

    • C. 

      Reduces the magnification of the image

    • D. 

      Improves sharpness of the image

    • E. 

      All of the above


  • 82. 
    The factor that would most likely be increased when taking radiographs on larger than average patients is:
    • A. 

      MA

    • B. 

      KVp

    • C. 

      Time

    • D. 

      Distance

    • E. 

      Filtration


  • 83. 
    When choosing the time for radiographic exposure, which of the following should be taken into consideration?
    • A. 

      Receptor speed

    • B. 

      Projection being taken

    • C. 

      Patient size and stature

    • D. 

      Child or adult patient

    • E. 

      All of the above


  • 84. 
    Which selection below correctly describes the image distortion produced when the patient's midsagittal plane is not centered?
    • A. 

      The occlusal plane forms a frown-like configuration

    • B. 

      The entire image is magnified and does not fit on the film

    • C. 

      A triangular-shaped radiopacity is produced in the midline

    • D. 

      Structures on one side of the image are narrowed and the other side are widened


  • 85. 
    Which of the following selections is NOT an accurate description of the focal trough?
    • A. 

      Predetermined layer of structures

    • B. 

      Sometimes referred to as the image layer

    • C. 

      Located between the film cassette and x-ray source

    • D. 

      Trough is narrower in the posterior and wider in the anterior


  • 86. 
    Rough handling of the film cassette during panoramic film unloading and reloading will produce which of the following artifacts?
    • A. 

      Dot-like radiopacities

    • B. 

      Overall high-density appearance

    • C. 

      Alternating black and white vertical lines

    • D. 

      Black branch-like static electricity images


  • 87. 
    When the patient's head is positioned too far backward, the clinician will observe all of the following manifestations except one. Which one is the exception?
    • A. 

      Image is too large and does not fit on the film

    • B. 

      Anterior teeth on both arches are involved most often

    • C. 

      The structures on one side will be narrower than the other

    • D. 

      Structures appear wider and very blurred compared to normal


  • 88. 
    Which of the following phrases is NOT consistent with production of panoramic ghost images?
    • A. 

      Magnified and unsharp appearance

    • B. 

      Same general shape as original object

    • C. 

      Location is higher than original object

    • D. 

      Appear on the same side as the original object


  • 89. 
    What error would cause the production of a wedge-shaped radiopaque artifact near the midline in panoramic radiography?
    • A. 

      The patient did not place his/her tongue against their hard palate

    • B. 

      The lead apron was placed too high up on the back of the patient's neck

    • C. 

      The operator let go of the exposure switch momentarily during the procedure

    • D. 

      The patient's spinal column was slumped and obscured the image in the midline


  • 90. 
    Which of the following is NOT an accurate description of intensifying screens?
    • A. 

      Located on the internal surfaces of an open film cassette

    • B. 

      Composed of phosphor crystals that fluoresce upon x-ray exposure

    • C. 

      Film size and sensitivity is paired with screen size and fluorescence

    • D. 

      Reflecting layer directs the ligh produced toward the screen base


  • 91. 
    When determining ideal panoramic film density, which of the following is the best region to examine to assess adequate density?
    • A. 

      Dentinoenamel junction on molars

    • B. 

      Mandibular parasymphyseal area

    • C. 

      Maxillary sinus cavity anatomy

    • D. 

      Gonial angel of the mandible


  • 92. 
    Which of the following selections is NOT correct about panoramic radiography?
    • A. 

      Unit requires pre-cleaning, disinfection, and barrier placement

    • B. 

      A thyroid collar is used to protect the neck during film exposure

    • C. 

      The object-film distance is greater compared to intraoral radiography

    • D. 

      Objects like earrings can produce ghost images on the panoramic film


  • 93. 
    Panoramic radiographs are recommended in all of the following clinical situations except:
    • A. 

      Evaluation of mixed dentition

    • B. 

      Examination of edentulous alveolar ridges

    • C. 

      Evaluation of periodontal furcation involvement

    • D. 

      Evaluation of third molar teeth development and position


  • 94. 
    Incorrect vertical angulation can result in an image that is:
    • A. 

      Elongated

    • B. 

      Foreshortened

    • C. 

      Overlapped

    • D. 

      Either A or B


  • 95. 
    The bitewing view shows the:
    • A. 

      Crowns and interproximal areas of the maxillary and mandibular teeth.

    • B. 

      Whole tooth crown to apex and surrounding bone.

    • C. 

      Crestal bone

    • D. 

      Both A and C


  • 96. 
    Which flim holder can aid in positioning the film during an endodontic procedure, because it fits around the dam clamp and the endodontic instruments ?
    • A. 

      XCP

    • B. 

      EeZee-Grip

    • C. 

      EndoRay

    • D. 

      Stabe bite block


  • 97. 
    With the paralleling technique, usually there are ___ posterior film posterior film sensor images taken.
    • A. 

      2

    • B. 

      4

    • C. 

      6

    • D. 

      8


  • 98. 
    Which teeth are included in the anterior set of images?
    • A. 

      Premolars and molars

    • B. 

      Canines and incisors

    • C. 

      Canines and premolars

    • D. 

      Incisors and molars


  • 99. 
    When taking radiographs using film, the white side of the film is always placed:
    • A. 

      Away from the teeth

    • B. 

      Toward the teeth

    • C. 

      Either away from or toward the teeth, it does not matter.

    • D. 

      Right next to the teeth being radiographed


  • 100. 
    When taking premolar bitewing image, the anterior edge of the film sensor should be placed:
    • A. 

      In the middle of the first premolar

    • B. 

      On the distal half of the canine

    • C. 

      On the distal half of the lateral incisor

    • D. 

      On the mesial of the second premolar


  • 101. 
    Vertical angulation:
    • A. 

      Differs according to the techinque being used.

    • B. 

      Refers to the up and down plane.

    • C. 

      Can be determined in degrees marked on the outside of the tubehead.

    • D. 

      All of the above.


  • 102. 
    Occlusal radiographs can be used for:
    • A. 

      Detecing decay.

    • B. 

      Checking bone levels between the teeth.

    • C. 

      Locating unerupted teeth.

    • D. 

      Checking for infections at the apex of the teeth.


  • 103. 
    In the paralleling technique, the central ray of the x-ray beam must be ___ to the film sensor and the long axis of the tooth.
    • A. 

      Intersecting

    • B. 

      Interproximal

    • C. 

      Parellel

    • D. 

      Perpendicular


  • 104. 
    If the central ray of the x-ray beam is not centered on the film sensor, a parital image will result on the film sensor, which is called a:
    • A. 

      Cone cut.

    • B. 

      Herringbone image.

    • C. 

      Blurred image.

    • D. 

      Elongated image.


  • 105. 
    Each of the following statements is true about taking x-rays using the paralleing technique except:
    • A. 

      The central ray must be perpendicular to the film sensor and the long axis of the tooth.

    • B. 

      The film sensor must be placed directly against the teeth being exposed.

    • C. 

      Failure to center the central ray on the film sensor could result in a cone cut.

    • D. 

      The central ray must be directed through the contact areas between the teeth.


  • 106. 
    A radiographic mount should always be labeled with the:
    • A. 

      Patients name.

    • B. 

      Operator's name.

    • C. 

      Patients name and the date the images were exposed.

    • D. 

      Patients name and the date the images were processed.


  • 107. 
    The focal trough is an imaginary three-dimensional curved area or space, shaped like a:
    • A. 

      Gutter.

    • B. 

      Bowling pin.

    • C. 

      Horseshoe

    • D. 

      Baseball diamond.


  • 108. 
    Advantages of panaramic imaging include which of the following?
    • 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 of panoramic imaging.


  • 109. 
    If the patient does not stand or sit with a straight spine:
    • A. 

      The panoramic image will be blurred

    • B. 

      An exaggerated smile line or curved downward smile line will appear.

    • C. 

      Detail of the apical regions of the teeth will be lost.

    • D. 

      The cervical spine will appear as a radiopacity in the center od the film, obscuring the diagnostic information.


  • 110. 
    The part of the unit that aligns the patients teeth as accurately as possible is the:
    • A. 

      Head positioner.

    • B. 

      Focal trough

    • C. 

      Frankfort plane

    • D. 

      Tubehead


  • 111. 
    The skill view that shows the bones of the face and skull and the soft tissue profile is the ____ projection.
    • A. 

      Lateral cephalometric

    • B. 

      Posteroanterior

    • C. 

      Magnetic resonance

    • D. 

      Temporomandibular


  • 112. 
    When the patients jaws are outside the focal trough, the resulting images are:
    • A. 

      Doubled

    • B. 

      Blurred

    • C. 

      Distorted.

    • D. 

      Too light.


  • 113. 
    Which statement id NOT true regarding magnetic resonance imaging (MRI) ?
    • A. 

      The MRI technique is valuable in the diagnosis of temporomandibular disorders.

    • B. 

      The MRI technique exposes the patient to a large amount of radiation and should only be used when no other source is available.

    • C. 

      The MRI has the ability to distinguish among soft tissues, such as salivary glands.

    • D. 

      MRI units are large and usually not found in dental offices.


  • 114. 
    A panoramic image allows the dentists to:
    • A. 

      Detect caries.

    • B. 

      View the entire dentition and related structures in on film.

    • C. 

      View all of the sinus cavities.

    • D. 

      Both A and B


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