Dental Materials

Card Set Information

Author:
cassiedh
ID:
74965
Filename:
Dental Materials
Updated:
2011-03-24 21:39:30
Tags:
Ch7
Folders:

Description:
preventive and bleaching materials
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  1. what is the optimal level in drinking water?
    .7ppm
  2. what is a common cause of fluorosis in children? (oh that looks yummy I think I shall eat it?)
    eating toothpaste (under six years)
  3. what type of fluoride has the largest benefits?
    TOPICAL application
  4. what is the neutral pH of the mouth?
    7
  5. what pH does the tooth minerals dissolve and cavities start?
    5.5 pH
  6. at what pH does fluorapatite dissolve?
    4.5
  7. t/f fluoride remains in saliva for several hours
    true
  8. what are two common in office fluoride products?
    • 1.23% APF gel or foam
    • 2% NaF
  9. what are three prescription at home use fluoride products?
    • 1.1% NaF gel or toothpaste
    • .4% SnF2 gel
    • .2% NaF rinse
  10. what are three OTC home use fluoride products?
    • .05% NaF
    • toothpaste .24% NaF
    • toothpaste .8% MFP
  11. what are two forms of systemic fluoride?
    • drinking water
    • Rx supplements (tablets, drops, lozenges)
  12. in office topical fluoride should be applied how often?
    twice a year
  13. if in office topical fluoride is applied twice a year how much will it reduce decay?
    20-26%
  14. t/f clorhexidine can cause black stain, calculus formation and affects to taste
    false BROWN stain
  15. sealing _____ caries reverses caries to inactive in ___%
    • ENAMEL
    • 89
  16. t/f you can seal if the caries is into the dentin
    FALSE CANNOT SEAL!
  17. what teeth are the most susceptible to pit/fissure caries?
    mandibular 1st and 2nd molars
  18. what teeth most commonly lose the sealant? why?
    • 2nd molars
    • MOISTURE CONTAMINATION
  19. t/f you seal all molars no matter what
    false do not seal if they don't have deep pits and fissures
  20. the light cure system leaves a ______ ______ layer on the surface of the filling that does NOT _______
    • oxygen inhibiting layer
    • polymerize
  21. t/f oxygen in the air inhibits the set of the resin on the surface of a sealant
    true
  22. moisture=_______
    FAILURE
  23. what teeth are most commonly have moisture failure?
    2nd molars
  24. what is the worst type of sealant failure?
    LEAKING!
  25. what are two contraindications to sealants?
    • shallow cusps
    • highly coalesced pit and fissures
  26. what are four causes of root sensitivity (red ones only and HINT HINT can be fixed with desensitizing agent)
    • toothbrush abrasion
    • erosion
    • abfraction (bruxism)
    • scaling and root planing
  27. what are two ways to fix root sensitivity?
    • restoration
    • desensitizing agent
  28. what is the most common desensitizing agent? and how long does it take until you get relief?
    • POTASSSIUM NITRATE!
    • 2 to 3 weeks
  29. t/f the desensitizing agent chemical passes through the tubules to act directly on the nerve
    true
  30. what are three things you can treat that cause sensitivity (in red only)
    • hot and cold extremes
    • exposed dentinal tubules
    • acidic diet
  31. what is the thickness ofa professionally made sports guard?
    2mm thick or 4 mm thick
  32. for heavy contact sports how thick should the sports guard be?
    4mm thick
  33. what % of energy is absorbed from a traumatic blow to the mouth?
    80%
  34. where does the a mouth guard cover?
    cover maxillary teeth and bone
  35. t/f a mouth guard occasionally covers both arches
    true
  36. t/f a mouth guard can protect lips from lacerations
    true
  37. where are hard acrylic mouth guards made?
    in a dental laboratory
  38. t/f there is more chair time to adjust hard acrylic mouth gaurds tahn thermoplastic sheets of polyethylene material
    true
  39. what are three important things to do for maintenaance of a mouth guard?
    • air dry
    • store in hard container
    • no alcohol (no mouthwash) no bleach
  40. bleaching passes through the _____- and oxidizes pigments in ____-
    • enamel
    • dentin
  41. what colors are often extrinsic stain?
    yellow brown
  42. what colors are easier to bleach?
    yellow brown
  43. what color is often intrinsic stain?
    blue gray/ black
  44. what colors is harder to bleach
    blue gray/black
  45. ______ is often added to bleaching materials to decrease tooth sensitivity?
    fluoride
  46. what chemicals for the tissues cause staining of the dentin?
    hemoglobin/iron sulfide
  47. what type of bleaching is termed walking bleach?
    internal
  48. what is amosan?
    sodium peroxyborate monohydrate + 30% hydrogen peroxide sealed into pulp
  49. what type of bleaching is in custom formed plastic trays worn for 30 minutes or overnight twice daily for two weeks
    home bleaching
  50. what should be done if patients have decay or leaking restoartions when trying to bleach? why?
    must be replaced to prevent bleach from entering dentinal tubules

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