DH 1050 quiz ? review for midterm exam

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anatomy2012
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284859
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DH 1050 quiz ? review for midterm exam
Updated:
2014-10-04 20:00:22
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midterm exam DH 1050
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taken off folder 2 #8 on recorder
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  1. which of the following areas would appear radioluscent
    air space (lucifer is dark)
  2. a stepwedge will reveal that radiographs taken at a low kVp will have _____ than those taken at higher kVp
    higher contrast
  3. which of the following factors would improve your image sharpness

    focal spot
    larger crystal size
    smaller crystal size
    a smaller crystal size
  4. the purpose of the hardening agent is to harden and shrink what
    the gelatin
  5. which size of bitewing film is used to examine posterior teeth of small children with primary dentition
    0
  6. when radiographs are veiwed subtle changes in density contrasts are easier to detect if
    all extraneous light completely eliminated
  7. suggestions for mounting radiographs include mounting bitewing radiographs with the curve of spee directed _____ toward the distill and remembering that most maxillary molars have how many roots ____
    upward, 3
  8. what is defined as the absence of pathogens
    asepsis
  9. which of the following are considered to be semi-critical instruments
    xray film holding device
  10. which of the following statements is true concerning cleaning and disinfection of the dental unit and environmental services
  11. which of the following surfaces on an x-ray machine must be covered or disinfected
  12. preparation of supplies and equipment involves sterilizing which of the following
    film holding devices
  13. when handling film the contaminated film package are opened with ______ hands and unwrapped films with ______ hands
    gloved and non gloved
  14. when the bisecting techniqe is used which of the following angles is bisected
    the angle between the film and the long axis of the tooth
  15. the primary benefit of using film holders with the bisecting technique is
    reduces the patients exposure to radiation
  16. when exposing a complete mouth series (FMX) when bisecting technique is used there are how many films recommended
    14 does not include bitewings
  17. to correct a film where apices do not appear
    make certain that no more than an 1/8 of an inch extends above the incisal edge
  18. a cone cut appears when
    the PID is not properly aligned with the periapical film holder
  19. when the film is reversed the image will be
    light with a herringbone pattern
  20. a panoramic film is typically used for evaluating
    impacted teeth
  21. in panoramic radiography the movement of the film and tubehead produces an image through a process known as what
    tomography
  22. in panoramic radiography what is the theoretical concept
    the focal trough
  23. the collimater used in panoramic radiography has an opening in the shape of what kind of slit
    narrow vertical
  24. the vertical angulation in the tubehead of the pano unit is
    fixed in a position so that the x-ray beam is directed slightly upwards
  25. the tubehead of the unit always rotates _____ the patients head and the film rotates ______
    • behind
    • in front
  26. in panoramic radiography which of the following exposure factors cannot be changed
    exposure time
  27. what occurs in a ghost image
    have a metallic or radiodense object causing the image
  28. on a panoramic radiograph your teeth will appear skinny if your
    teeth are to far forward on bite block
  29. the disadvantage of panoramic radiography when contrasted with intraoral radiography is
    the image on the pano is not as sharp as on the intraoral radiographs becasue of the intensifying screens
  30. intraoral films are primarily used in which of the following specialty areas
    oral surgery
  31. the most common extraoral film is
    panoramic
  32. which of the following is the fastest recommend screen and screen film combo
    rare earth with green light
  33. a blank is a device that is used to reduce the amount of scatter radiation that reaches the extraoral film during exposure
    a grid
  34. lateral jaw radiography is what
    for those with limited jaw opening
  35. which of the following projections would be best to evalute impacted 3rd molars
    ramus of the mandible
  36. the purpose of the transcranial projection is to evaluate the articular eminence and the ____ surface of the condyle
    superior

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