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2010-10-20 19:48:20

quiz 7
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  1. what is something the pano is used to evaluate?
    impacted teeth
  2. what process does the pano use?
  3. what is the theoretical concept where the dental arches are positioned to be seen clearly?
    focal trough
  4. what is the collimator for the pano?
    narrow vertical slit
  5. the vertical angulation of the pano is ____ and angled ____
    • fixed
    • upward
  6. the tubehead rotates ____ the patient while the film rotates ____ of the patient
    • behind
    • infront
  7. what factor for the pano cannot be changed?
    exposure time
  8. what causes a ghost image?
    metallic objects are not removed
  9. what causes a reverse smile?
    chin tipped up
  10. what causes the anterior teeth to appear skinny
    teeth too far forward on biteblock
  11. what is the disadvantage of the pano vs intraoral?
    not as sharp because of the intensifying screens
  12. what is an example of a specialty that most often uses extraoral radiography
    oral surgery
  13. what is the most common used extraoral radiograph?
  14. what is the fastest intesifying screen and what color does it emit?
    • rare earth
    • green
  15. what is the device used to limit scatter radiation
  16. when would you use the lateral jaw radiography?
    with a patient that has limited jaw opening
  17. what extraoral radiograph would you take to see the impacted third molars?
    ramus of mandible projection
  18. what is the purpose of the transcranial projection?
    to view the articular eminence and the superior aspect of the condyle
  19. what are some qualities of the cone beam imaging?
    they are digital and are all done with a computer
  20. what is the benefit of the intensifying screen?
    reduces exposure time