theory II ch 36

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jackiedh
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71415
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theory II ch 36
Updated:
2011-03-07 22:01:37
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theory II
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theory II ch 36
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  1. what will happen to the blade if inaccurate sharpening is done?
    the blade can distort and the instrument will be useless
  2. t/f sharpening is an essental and integral part of instrumentation
    true
  3. t/f an instrument that is in good shape with sharp cutting edges leads to decreased tactile sensitivity during instrumentation
    FALSE! INCREASED
  4. t/f a dull instrument has to be gripped firmly
    true
  5. t/f fewer strokes are required with a sharp instrument
    true!
  6. t/f there is less possibility of burnishing rather than removing calc with a dull instrument
    false! with a SHARP instrument
  7. t/f if an instrument is dull, there is loss of control and increased likelihood of slipping with instrument and lacerating the gingival tissue
    true
  8. with a ____ instrument, there will be a greater likelihood of WMDs (_______ _______ _______) from excessive muscle strain and an increased number of stroke repetitions
    • dull
    • work-related musculoskeletal disorder
  9. which stones are quarried from mineral deposits, the hard Arkansas stone is used for dental instruments because of its fine abrasive particle size
    Natural abrasive stones
  10. what are hard nonmetallic substances impregnated with aluminum oxide, silicon carbide or diamond particles. (ruby stone, carborundum stones, diamond hone)
    artificial materials
  11. ceramic aluminum oxide is an example of an ______ _______
    artificial material
  12. _____ _____ are metals harder than most dental instrument steel, therefore are capable of sharpening the instrument
    steel alloys
  13. what are the two general groups for sharpening stones?
    • unmounted
    • mandrel mounted (has a handpiece)
  14. what is RPI?
    repetitive injuries
  15. with the grain of a stone, start with ____ and then end with _____
    • abrasive
    • fine synthetic stone
  16. stone surface is abrasive and has ______ to grind the blade
    crystals
  17. the cutting edges where the lateral and face meet should be a _____ line
    THIN
  18. if an instrument reflects light, it is considered ______. this is called the ____ or ____ test
    • dull
    • visual or glare test
  19. plastic testing stick, if it catches it is ______
    sharp
  20. what is an alternative if a plastic testing stick is not available to check the sharpness of an instrument?
    saliva ejector
  21. t/f you may sharpen instruments during appts
    true, although time consuming
  22. ______ ______ might dry out a natural stone which requires lubrication
    steam autoclaving
  23. t/f if a stone needs oil for sharpening, do not sharpen during tx
    true!
  24. what are two advantages of a dry stone?
    • less contamination
    • not as porous
  25. which stone prevents contamination, no nicks in blade, complete sterilization, and better for use during pt care?
    Dry stone
  26. smaller particle size or a _____ _____ abrades or reduces more _______ and produces a finer cutting edge
    • finer grain
    • slowly
  27. t/f the cutting edge is a line, and therefore has length but no thickness
    true
  28. t/f if an edge is dull, it may be nicked when drawn over a rough surface
    true
  29. what is the object in sharpening?
    to reshape the cutting edge to a fine line
  30. t/f a dull edge is rounded, and therefore it has thickness
    true
  31. sharpening is accomplished by grinding the surface(s) that form the ______ ______
    cutting edge

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