DH radiology quiz 3

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sthomp88
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35061
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DH radiology quiz 3
Updated:
2010-09-15 23:44:32
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chapter ninteen bite wing technique
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  1. describe the principles for the bite-wing technique
    • film is placed in the mouth parallel to crown of both upper and lower teeth
    • film is stabilized when pt bites on bite-wing tab or bite-wing film holder
    • central ray is directed through the contacts of teeth using a vertical angulation of +10 degrees
  2. what types of holders are used for bite-wings?
    • rinn XCP bite-wing instrument
    • bite-wing tab
  3. what are size 0 films used for?
    children with primary dentition
  4. what are size 1 films used for?
    children with mixed dentition
  5. what are size 2 films used for?
    teens and adults. can be placed vertically or horizontally
  6. what are size 3 films used for?
    one film taken on each side of adults....not recommended
  7. describe correct horizontal angulation of bite-wing films
    central ray is directed perpendicular to curvature of arch and through the contact areas of teeth
  8. describe incorrect horizontal angulation of bite-wing technique.
    results in overlapped contacts and nondiagnostic films
  9. describe correct verticle angulation of the bite-wing technique.
    angle of +10 degrees, used to compensate for the slight bend of the upper portion of the film and slight tilt of maxillary teeth
  10. describe incorrect verticle angulation of the bite-wing technique.
    results in a distorted image and nondiagnostic film
  11. what are the rules of film placement for the bite-wing technique?
    must be placed to cover the prescribed area of teeth to be examined
  12. what are the rules of film position for the bite-wing technique?
    must be parallel to crowns of both upper and lower teeth and must be stabilized as patient bites
  13. what are the rules of verticle angulation for the bite-wing technique?
    central ray must be directed at +10 degrees
  14. what are the rules of horizontal angulation for the bite-wing technique?
    central ray must be directed through contact areas
  15. describe the step-by-step procedure of pt preparation for bite-wing technique
    • explain procedure to pt
    • adjust chair
    • adjust headrest (pt upper arch parallel to the floor)
    • place lead apron and thyroid collar
    • remove objects
  16. describe the step-by step procedure of equipment preparation for the bite-wing technique.
    • set exposure factors (kVp, ma, and time)
    • open sterilized packages and assemble film holders if needed
    • set verticle and horizontal angulation on tube-head
  17. where are bitewing films necessary?
    only in areas of interproximal contact
  18. how do you know how many bitewing films to take on a pt?
    it is based on the amount of teeth in the arch
  19. what is the sequence order for bite-wing films?
    • in FMX expose all pa films first and finish with bite-wing films
    • in BWX expose premolars first, than molars
  20. what do you want to see on the premolar film?
    • centered on the 2nd premolar
    • see the distal of or entire canine, and the 1st molar
  21. what do you want to see on the molar film?
    • centered on the 2nd molar
    • see distal or whole 2nd premolar and all 3 molars if possible
  22. what are verticle bite-wings used for?
    to examine the level of alveolar bone in periodontal patients
  23. what should you do for bite-wing films in the case of edentulous spaces?
    • use cotton rolls in areas of missing teeth
    • avoid tipped films
  24. what should you do about bitewing films in the case of bony growth?
    • place film between the tongue and tori
    • if large tori are present, position tab at edge of teeth or use film holder

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