Dental Material terms exam I

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darbydo88
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Dental Material terms exam I
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2011-06-12 16:07:42
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exam I
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  1. the quality or condition of sticking together or holding fast ; any attraction process between
    dissimilar
    molecular
    species
    that can potentially bring them in "direct contact"

    adhesion
  2. the effects
    the materials have on living tissue (e.g. a crown should not irritate the
    gingiva, tongue, or buccal mucosa)

    biologic properties
  3. man-made
    materials that are used to replace tissues or that function in intimate contact
    with living tissues
    biomaterials
  4. a
    very common dental monomer used in a wide variety of dental products

    Bis-GMA
  5. result
    of electromagnetic force, holding atoms together

    Bonding
  6. if
    a restoration is constructed on the replica
    cast
  7. the setting reactions as well as the decay or degradation of
    materials(e.g. gypsum products set via a precipitation process, whereas dental
    composites polymerize)

    Chemical Properties
  8. measure of this change in volume (materials expand when
    heated) in relation to the change in temperature

    Coefficient of Thermal Expansion
  9. the
    intermolecular attraction between like-molecules

    cohesion
  10. pushing
    or crushing stress
    compression
  11. the
    amount or mass of material in a given volume
    density
  12. biomaterials used in or around the oral cavity

    dental materials
  13. when the resulting replica is used to study the size and position
    of the oral tissues

    Diagnostic / Study / Model
  14. material that can stick to a flat surface or bond two flat surfaces together
    adhesive

  15. replica of
    a single tooth


    die
  16. solidification
    by freezing or cooling

    Gelation-
  17. property
    that is measured by scientific instruments that press a special tip into the
    surface of the test material. Usually measured by KHN knoop hardness number

    Hardness-
  18. Absorption of fluid by a
    solid or colloid that results in swelling

    Imbibition-
  19. based on the laws of physics that dexcribe mass, energy, force,
    light, heat, electricity, and other physical phenomena

    Physical Properties
  20. The bonding of two or more monomers to form a polymer. A chemical
    process that effects this bonding.

    Polymerization-
  21. composed
    of long chains of covalently bonded, repeating units. Chains are composed of carbon, hydrogen, and other
    elements.

    Polymers-
  22. slip)
    stress occurs when parts of an object slide by one another.

    Shear
  23. -the
    result of solute with solvent

    Solution
  24. amount
    of material that dissolves in a liquid such as water

    Solubility-
  25. the
    change in length divided by the original length
    Strain-
  26. the
    force divided by the area on which the force has been applied

    Stress-
  27. acts as wetting
    agents to lower the surface tension of a liquid
    and allow for increased spreadability. (reduce the contact angle of the mixed
    gypsum product on the surface of the impression)

    Surfactant-
  28. liquid separation in gel: the process by which a liquid is separated from a gel owing to further
    coagulation (hydrocolloid materials contract slightly after setting and exude
    water)

    Syneresis-
  29. a
    pulling stress
    Tension-
  30. rate of heat flow through a material

    Thermal Conductivity
  31. capable of softening or fusing when heated and of hardening again when
    cooled

    Thermoplastic-
  32. twisting
    force, like turning a door knob
    Torsion
  33. relatively weak electric forces that attract neutral molecules to one
    another in gases, in liquefied and solidified gases, and in almost all organic
    liquids and solids.

    Van Der Waals Forces-
  34. ability to flow

    Viscosity-
  35. the ability of a liquid to maintain contact with a
    solid surface, resulting from intermolecular interactions when the two are
    brought together.

    Wettability-

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