ch 12 embryology cont

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Author:
jackiedh
ID:
47918
Filename:
ch 12 embryology cont
Updated:
2010-11-07 13:52:15
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enamel continued
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ch 12 embryology enamel cont
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  1. what are the 6 clinical considerations of enamel?
    • attrition
    • abrasion
    • erosion
    • caries
    • abfraction
    • deep pits and grooves
  2. attrition is wearing away of the enamel because of ________ to _______ contact. can be caused by normal _________ or __________
    • tooth to tooth
    • occlusion
    • grinding
  3. if someone has attrition, which one will wear away first? porcelain or tooth?
    tooth, porcelain is stronger than enamel
  4. abrasion is wearing away of the enamel caused by _____-_______ contact. usually caused by _____ toothbrushing and abrasive ________. be careful with polishing pastes you choose
    • non-tooth
    • hard
    • toothpaste
  5. the wearing away caused by chemical means:
    erosion
  6. erosion is usually caused by ________ ________ in bulimics and people with severe ______ _______ or beverages with high acidity content such as _____ or ______ drinks (sucking on lemons too)
    • stomach acid
    • acid reflux
    • sports
    • soft
  7. if acid comes in contact with your teeth, should you brush them right away?
    how many minutes until it is safe to brush?
    • no
    • 15 minutes
  8. demineralization of enamel from the acid byproducts of cariogenic bacteria (plaque poop) create:
    caries
  9. caries occurs when the pH level is less than ______
    5.5
  10. enamel breaks away at the cervical margin of the tooth. may be caused by tensile and compressive forces during tooth flexure:
    abfraction
  11. what treatment is needed to fix an abfraction?
    a class V filling (catches stain and needs replacement frequently)
  12. while laying down the matrix, the ameloblasts backed into each other and it cut off their nutritional supply. this created incomplete enamel. what is formed?
    deep pits and grooves
  13. T/F the incomplete enamel is a pit or groove in the tooth that is too big for your toothbrush but small enough for bacteria
    false! too small for toothbrush, big enough for bacteria
  14. in pits and grooves, the bacteria pass through _____ in the enamel and start ________ the less calcified dentin and pulp beneath. this is what "_______" when you explore it
    • gaps
    • demineralize
    • sticks
  15. why does it take a long time for bacteria to demineralize enamel?
    because it is 98% calcified
  16. sealants create a _________ so bacteria cannot _________ the pit or groove.
    • barrier
    • penetrate
  17. ________ fluoride helps form stronger crystalline structures while teeth develop
    systemic
  18. _________ fluoride helps to remineralize enamel after bacterial demineralization.
    topical
  19. what removes some of the organic portions of enamel to open gaps in the enamel so the sealant material can flow and increase surface attachment?
    etching
  20. how long after etching will a tooth repair itself?
    one day
  21. etching before placing a sealant allows ________ binding to occur
    mechanical
  22. stains from dark foods, drinks, and tobacco collect in the ___________ region (surrounding each of the enamel rods)
    interprismatic
  23. what is the interprismatic region?
    the space between the enamel
  24. tooth whitening products contain ________ products that will bleach out the stain from the _________ regions and reach all the way to bleach the ________. this is what causes _________
    • peroxide
    • interprismatic
    • dentin
    • sensitivity
  25. when the dentin is bleached, it can cause sensitivity because the _________ ________ communicate ________ with the pulp (nerve supply) of the tooth.
    • dentinal tubules
    • directly
  26. what closes the pores to desensitize?
    fluoride

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