ch 21 radiology

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jackiedh
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50284
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ch 21 radiology
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2010-11-17 21:57:32
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occlusal localization techniques
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ch 21 radiology
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  1. chewing surfaces of the posterior teeth:
    occlusal surfaces
  2. a type of intraoral radiographic examination used to inspect large areas of the maxilla or mandible on one film:
    occlusal examination
  3. the method used to expose a film in the occlusal examination:
    occlusal technique
  4. in the occlusal technique, size ____ intraoral film is used for an adult. for a child, the occlusal film size ____ is used
    • 4
    • 2
  5. occlusal technique is a ____________ radiographic technique that is usually used in conjunction with a ______ or _______ radiographs.
    • supplementary
    • PA
    • BWX
  6. which film is used to locate the following: retained roots, supernumerary, unerupted, or impacted teeth, foreign bodies in the maxilla or mandible, salivary stones in the duct of the submandibular gland, evaluate the extent of lesions in the max or man
    occlusal radiograph
  7. what type of film is used to evaluate the boundaries of the max sinus or fractures in the maxilla or mandible?
    occlusal radiograph
  8. which film aids in the examination of patients who cannot open their mouths more than a few millimeters?
    occlusal radiograph
  9. which film can be taken to examine the area of a cleft palate and/or measure changes in the size and shape of the maxilla or mandible?
    if you don't know it by now...it is the occlusal radiograph!
  10. what is the first step in patient preparation before taking occlusal radiograph?
    briefly explain the radiographic procedure to the patient
  11. for maxillary occlusal fims, the patients head must be positioned so the maxillary is ______ with the floor and the midsagittal plane is ________ with the floor
    • parallel
    • perpendicular
  12. for some mandibular occlusal films, the patients head must be ________ and positioned so the occlusal plane is _________ to the floor. For others it is _________
    • reclined
    • perpendicular
    • parallel
  13. after placing the lead apron on your patient, what should happen last for patient preparation?
    remove objects from the mouth (retainers, gum, dentures) and glasses
  14. what are the three maxillary occlusal projections?
    • topographic
    • lateral (R/L)
    • pediatric
  15. which occlusal projection is used to examine the palate and anterior teeth of the maxilla?
    maxillary topographic occlusal projection
  16. which occlusal projection is used to examine the palatal roots of the molar teeth (also locate foreign bodies or lesions in the posterior maxilla)
    maxillary lateral occlusal projection
  17. which occlusal projection is used to examine the anterior teeth of the maxilla and is recommended for use in children 5 years or younger?
    maxillary pediatric occlusal projection
  18. what are the three mandibular occlusal projections?
    • topographic
    • cross-sectional
    • pediatric
  19. which occlusal projection is used to examine the mandibular anterior teeth?
    mandibular topographic occlusal projection
  20. occlusal projection used to examine the buccal and lingual aspects of the mandible and locate foreign bodies or salivary stones in the region of the floor of the mouth
    mandibular cross-sectional occlusal projection
  21. occlusal projection used to examine the anterior teeth of the mandible and recommended for children 5 years or younger
    mandibular pediatric occlusal projection
  22. which 2 occlusal projections is the PID placed between the eyebrows on the bridge of the nose?
    • maxillary topographic
    • maxillary pediatric
  23. what kind of bite is used when the occlusal film is placed in the mouth?
    end to end
  24. T/F you should place the occlusal film as far posteriorly as the patient's anatomy permits.
    true love
  25. which is the only occlusal film that the central ray should be aimed 90 degrees toward the center of the film?
    mandibular cross-sectional
  26. all but which occlusal projection is directed through the midline of the arch toward the center of the film?
    maxillary occlusal projection
  27. in the maxillary lateral occlusal projection, once the film is placed in the mouth, should you shift the film to the right or left side of intended interest?
    yes by cracky
  28. how far beyond the long edge of the film should be film be over the buccal surfaces of the posterior teeth?
    1/2 inchworm
  29. where should the PID be placed for the maxillary lateral occlusal projection?
    top edge above the corner of the bushy eyebrow
  30. where should the white side of the film be facing when taking a maxillary occlusal?
    up toward the PID
  31. in which occlusal projection will the mandible need to be perpendicular to the floor?
    mandibular cross-sectional o.p.
  32. about where should the PID be centered in relation to the head during the mandibular cross-sectional projection?
    about 1 inny inch below the chiny chin
  33. when should the long edge of the film be in a front to back direction? (for which projection)
    maxillary lateral occlusal projection
  34. in what direction should the long edge of the film be placed in all projections except the maxillary lateral projection?
    side to side
  35. for which occlusal projection would the PID be CENTERED over the chin?
    mandibular pediatric occlusal
  36. a method used to locate the position of a tooth or object in the jaws:
    localization technique
  37. T/F a radiograph depicts the buccal-lingual relationship, or depth, of an object
    false! it depicts an object in the superior-inferior and anterior-posterior relationships
  38. with the maxillary lateral projection, where is the central ray directed?
    through the contact areas of the intended intereste
  39. when would it be necessary to establish the buccal-lingual position of a structure?
    foreign object or impacted tooth within the jaws
  40. T/F localization technique can be used to obtain three-dimensional information
    true!
  41. foreign bodies, unerupted teeth, impacted teeth, retained roots, root positions, salivary stones, jaw fractures, broken needles and instruments, and filling materials can all be seen with which technique!?
    localization technique
  42. what are the two basic techniques used to localize objects?
    • buccal object rule
    • right angle technique
  43. which rule of the localization technique governs the orientation of structures portrayed in two radiographs exposed at different angles?
    buccal object rule
  44. horizontal angulation is used when trying to locate a __________ aligned image
    vertically (i.e. root canal)
  45. a vertical angulation is used when trying to locate a ___________ aligned image
    horizontal (i.e. mandibular canal)
  46. which 2 angulations are used for the buccal object rule?
    vertical or horizontal
  47. when comparing two radiographs after using the buccal object rule, if the object has moved in the SAME direction as the PID, that means the object is positioned ________
    lingual (same = lingual, its just that easy!)
  48. what is the SLOB rule?
    same=lingual and opposite=buccal
  49. if the object being compared in two radiographs with the buccal object technique has moved OPPOSITE of the PID the the structure is positioned to the________
    buccal (OB opposite = buccal)
  50. when is the SLOB rule used?
    when determining object placement using the buccal object rule
  51. how many radiographs are needed to use the localization technique?
    dose!
  52. for the right-angle technique, which 2 radiographs are needed?
    a PA and an occlusal
  53. what will the occlusal film show using the right-angle technique?
    it shows the object in the buccal-lingual and anterior-posterior relationships
  54. when using a PA for the right-angle technique, what will it show?
    • superior-inferior
    • anterior-posterior
  55. T/F using the right-angle technique, two films are exposed at right angles to identify the location of an object
    true
  56. what are the vertical angulation degrees for the occlusal projections?
    max topographic
    max lateral
    max pediatric
    man topographic
    man cross-sectional
    man pediatric
    • max topographic +65
    • max lateral +60
    • max pediatric +60
    • man topographic -55
    • man cross-sectional 90
    • man pediatric -55

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