DMS vocabulary Flashcards

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1
Q

what is meant by fracture?

A

large force causes catastrophic destruction of materials structure

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2
Q

what is meant by hardness in relation to dental materials?

A

ability of surface to resist indentation

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3
Q

what is meant by abrasion in relation to dental materials?

A

material surface removal due to grinding

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4
Q

what is meant by abrasion resistance in reference to dental materials?

A

ability to withstand surface layers being removed, so compromising surface integrity

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5
Q

what is meant by fatigue in reference to dental materials?

A

repetitive “small” stresses causes material fracture

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6
Q

what is meant by creep in reference to dental materials?

A

gradual dimensional change due to repetitive small forces

  • small forces are applied over long period of time
  • causes the material to dimensionally change & flow
  • results in permanent deformation
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7
Q

what is meant by deformation of a dental material?

A

applied stress causes permanent change in materials dimensions
- does NOT FRACTURE IT

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8
Q

in reference to dental materials, what is meant by elasticity?

A

the ability of a material to recover its dimensions after experiencing a stress

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9
Q

what are examples of chemical properties?

A
  • setting mechanism
  • setting time
  • corrosive potential
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10
Q

what are examples of physical properties in dental materials?

A
  • viscosity
  • thermal conductivity
  • thermal expansion
  • density
  • radiopacity
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11
Q

what are examples of mechanical properties of dental materials?

A
  • hard/soft
  • strong/weak
  • rigid/flexible
  • ductile/brittle
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