Dental Materials

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Author:
cassiedh
ID:
74778
Filename:
Dental Materials
Updated:
2011-03-23 21:22:38
Tags:
ch6
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Description:
Composites, glass ionomers and compomers
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  1. what is an esthetic restorative material composed of a bonding agent and tooth colored filler particles?
    composite
  2. what is added to composite for radiopacity? 2
    barium and stronium
  3. what are the three most common filler particles in composite?
    • silicates
    • quartz
    • glass
  4. what is the particle size of nanofill?
    .001 (its like sugar)
  5. how are composites classified? 3
    • handling characteristics
    • clinical application
    • filler particle size
  6. what is a hybrid composite a blend of?
    micro and midfill (the jelly beans and nerds)
  7. what are nanofilled-micro-hybrid composites a blend of?
    blend of micro, midi and nanofilled particles (jelly beans, nerds and sugar)
  8. why are microfill composites popular?
    due to high polishability and ease of handling
  9. t/f microfills require tooth support
    true
  10. why are hybrids popular?
    due to combined strength and beauty
  11. t/f nanofills increase polishability and compressive strength
    • first part is true
    • second false add no compressive strength
  12. what is used to isolate the field and prevent salivary contamination
    rubber dam
  13. _____ cured composits are less porous than ____ cured
    • light
    • self
  14. what is used to polish a composite? 2
    • tin oxide
    • diamond polishing paste
  15. what is NOT used to polish a composite
    coarse pumice
  16. how do you detect a composite overhang
    with explorer
  17. is a composite direct or indirect?
    direct
  18. is a porcelaIN an direct or indirect?
    hmmm I wonder.... INdirect
  19. what are four materials used for direct placement?
    • composite
    • glass ionomer cement
    • resin modified glass ionomer cement
    • compomer
  20. what are the six components of composite?
    • ORGANIC RESIN (POLYMER) MATRIX
    • INORGANIC SILICA FILLER PARTICLES
    • SILANE COUPLING AGENT
    • initiator
    • accelerator
    • pigment
  21. what are the two actions of the silane coupling agent in the composite?
    • adheres particle to matrix
    • provides stronger bond between filler and resin
  22. what is the most common organic matrix of composite resin?
    BIS-GMA
  23. what are the two components of BIS-GMA and what is it?
    • bisphenol-A
    • glycidal methacrylate
    • resin matrix of composite
  24. filler particles in composite make organic resin ______, more _____ _____, _____ handling characteristics, and reduce ________ ______.
    • stronger
    • wear resistant
    • control
    • polymerization shrinkage
  25. what does a higher filler content in a composite equal? 2
    • stronger
    • more wear resistant
  26. t/f a composite with lower filler particles makes for a weaker and less wear resistant material?
    false! stronger and more wear resistant material
  27. t/f you want lager filler particles of composite on the surface
    FALSE you want SMALLER particles on the surface
  28. what is the coupling agent of a composite?
    saline
  29. _____ join together to create polymers
    monomers
  30. BASE=______ + composite
    initiator
  31. _____=initiator + composite
    BASE
  32. what is an example of an initiator in a base?
    benzoyl peroxide
  33. catalyst=______ + composite
    activator
  34. ______= activator + composite
    catalyst
  35. what is an example of an activator in a catalyst
    tertiary amines
  36. with composite polymersation a polymer to polymer is a _____ ____ to form _____ bond
    • cross link
    • covalent
  37. what is the most common type of composite resin
    light cure
  38. t/f increments of composite are to be added at 3-4 mm
    false <2 mm(less than or equal to)
  39. hybrid macrofiller and microfiller composites are ____ and ____ ___
    • strong
    • polish well
  40. what is the particle size of a nanohybrid?
    .005-.02 um
  41. how much is the shrinkage reduced with a nanohybrid?
    3-1%
  42. t/f a nanohybrid is weak and is dull
    FALSE is strong and has a high shine
  43. flowable composites have a ____ viscosity
    low
  44. where are flowable composites great to use?
    CONSERVATIVE DENTISTRY
  45. what are four examples of conservative dentistry that a flowable is good for?
    • proventalive resins
    • sealants
    • class V non carious lesions
    • liners
  46. t/f flowable composites have a higher shrinkage, more wear and weaker than hygprids
    true
  47. where would you not use a composite restoration?
    in areas of high occlusal function or high wear
  48. what type of composite is highly viscous resins contain with high volume filler particles
    packable composites
  49. where are packable composites used?
    POSTERIOR teeth in HIGH function

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