Dental Materials

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Author:
cassiedh
ID:
61023
Filename:
Dental Materials
Updated:
2011-02-02 17:59:38
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  1. what are the materials used to treat disease?
    therapeutic agents
  2. what is the property of a material that allows it to not impede or adversely affect living tissue?
    biocampatible
  3. what are the materials used to reconstruct tooth structure?
    restorative agents
  4. what is the force applied to compress an object?
    compressive force
  5. what is the force applied in opposite directions to stretch an object?
    tensile forces
  6. what is the force applied when two surfaces slide against each other or in a twisting or rotating motion?
    shearing force
  7. what is the internal force, which resists the applied force?
    stress
  8. what is the distortion or deformation that occurs when an object cannot resist a stress
    strain
  9. what is the bending caused by a combination of tension and compression?
    flexural stress
  10. what is a fracture resulting from repeated stresses that produce microscopic flaws to grow?
    fatigue failure
  11. what is a material's ability to maintain its position without displacement under stress?
    retention
  12. what is susceptible to being dissolved?
    solubility
  13. what is the ability to absorb moisture?
    water sorption
  14. what is the deterioration of a metal caused by a chemical attack or electrochemical reaction with dissimilar metals in the presence of a solution containing electrolytes (such as saliva)
    corrosion
  15. what is the discoloration resulting from oxidation of a thin layer of a metal at its surface. It is not as destructive as corrosion
    tarnish
  16. what is an electrical current transmitted between two dissimilar metals?
    galvanism
  17. a change in the size of matter. For dental materials this usually manifests as expansion caused by heating and and contraction caused by cooling
    dimensional change
  18. the measurement of change of volume or length in relationship to change in temperature
    coefficient of thermal expansion
  19. movement of fluid in the microscopic gap of the restoration margin as a result of differences in the expansion an contraction rates of the tooth and the restoration with temperature changes associated with ingestion of cold or hot fluids or foods
    percolation
  20. the rate at which heat flows through materials
    thermal conductivity
  21. materials having low thermal conductivity
    insulators
  22. the production of heat resulting from the reaction of the components of some materials when they are mixed
    exothermic reaction
  23. the act of sticking two things together. In dentistry, it is used to describe the bonding or the cementation process. Chemical adhesion occurs when atoms or molecules of dissimilar substances bond together and differs from cohesion in which attraction among atoms and molecules are like materials hold them together
    adhesion
  24. to connect or fasten, to bind
    bonding
  25. the ability of a liquid to wet or intimately contact a solid surface. Water beading on a waxed car is an example of poor ______
    wetting
  26. the ability of a liquid material to flow
    viscosity
  27. the minimum thickness obtainable by a layer of a material. It is particularly important to dental cements
    film thickness
  28. the electrical charge that attracts atoms to a surface
    surface energy
  29. the space between the walls of the preparation and the restoration
    interface
  30. leakage of fluid and bacteria caused by microscopic gaps that occur at the interface of the tooth and the restoration margins
    microleakage
  31. the color of the tooth or restoration. It may include mixtures of colors such as yellow brown
    hue
  32. the intensity or strength of a color
    chroma
  33. how light or dark a color is. A low _____ is darker and high _____ is brigher
    value...value...value
  34. light passing directly through an object
    transparent
  35. optical property in which light is completely absorbed by an object
    opaque
  36. varying degrees of light passing through and being absorbed by an object
    translucency
  37. a life like quality
    vitality

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