Dental Materials

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Author:
jackiedh
ID:
60850
Filename:
Dental Materials
Updated:
2011-01-19 21:48:21
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Dental materials ch 2 definitions
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  1. materials used to treat disease
    therapeutic agents
  2. the property of a material that allows it to not impede or adversely affect living tissue
    biocompatible
  3. materials used to reconstruct tooth structure
    restorative agents
  4. force applied to compress an object
    compressive force
  5. force applied in opposite directions to stretch an object
    tensile force
  6. force applied when two surfaces slide against each other or in a twisting or rotating motion
    shearing force
  7. internal force, which resists the applied force
    stress
  8. distortion or deformation that occurs when an object cannot resist a stress
    strain
  9. bending caused by a combination of tension and compression
    flexural stress
  10. a fracture resulting from repeated stresses that produce microscopic flaws that grow
    fatigue failure
  11. a material's ability to maintain its position without displacement under stress
    retention
  12. susceptible to being disolved
    solubility
  13. 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
  14. discoloration resulting from oxidation of a thin layer of a metal at its surface. not as destructive as corrosion
    tarnish
  15. an electrical current transmitted between two dissimilar metals
    galvanism
  16. a change in the size of matter. for dental materials, this usually manifests as expansion caused by heating and contraction caused by cooling
    dimensional change
  17. the measurement of change in volume or length in relationship to change in temperature
    coefficient of thermal expansion
  18. movement of fluid in the microscopic gap of the restoration margin as a result of differences in the expansion and contraction rates of the tooth and the restoration with temperature changes associated with ingestion of cold or hot fluids or foods
    percolation
  19. the rate at which heat flows through chemical material
    thermal conductivity
  20. materials having low thermal conductivity
    insulators
  21. the production of heat resulting from the reaction of the components of some materials when they are mixed
    exothermic reaction
  22. the act of sticking two things together. in dentistry, it is used to describe the bonding or cementation process. chemical adhesion occurs when atoms or molecules of dissimilar substances bond together and differ from cohesion in which attraction among atoms and molecules of like materials hold them together
    adhesion
  23. to connect or fasten, to bind
    bonding
  24. ability of a liquid to wet or intimately contact a solid surface. water beading on a waxed car is an example of poor ______
    wetting (yourself)
  25. the ability of a liquid material to flow
    viscosity
  26. the electrical charge that attracts atoms to a surface
    surface energy
  27. the space between the walls of the preparation and restoration
    interface
  28. leakage of fluid and bacteria caused by microscopic gaps that occur at the interface of the tooth and restoration margins
    microleakage
  29. color of the tooth or restoration. it may include a mix of colors such as yellow-brown
    hue (yellow-brown looks like peepoo)
  30. the intensity or strength of a color( e.g. bold yellow has more chroma than a pastel yellow)
    chroma
  31. how light or dark a color is. a low value is darker and a high value is brighter
    value
  32. light passing directly through an object
    transparent
  33. optical property in which light is completely absorbed by an object
    opaque
  34. varying degrees of light passing through and being absorbed by an object
    translucency
  35. a life-like quality
    vitality

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