Exam 18: Dental Laboratory Materials

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When gold is tempered, it is

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Impression plaster is used when

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A mix of three metals is called a/an

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The type of gold used for simple onlay procedures is

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Polysulfides and polyethers are examples of which impression materials?

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A type of wax used to set teeth for a denture construction is called boxing wax.

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Match the term to its correct definition.
hardening of a material through a chemical or light-activated response
working time
reproduction of a prepared tooth
coefficient of thermal expansion
amount of change in form that takes place during heat exposure
exothermic
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hardening of a material through a chemical or light-activated response
working time
reproduction of a prepared tooth
coefficient of thermal expansion
amount of change in form that takes place during heat exposure
exothermic
ability of the material to resist fracture
bonding
period of time when material assumes shape but remains pliable
hygroscopic
submersion into water
thermal conductivity
maximum amount of stress a material can withstand without deformation
hydrophilic
mixing of mercury with other alloy material to form an amalgam
inhibitor
absorption of water
tensile strength
time period when the material can be manipulated without adverse effect
flow
giving off water
trituration
ability of a material to return to its original form when stress is removed
hardness
tendency of metals to produce an electrical charge when in contact with each other
malleability
ability of the material to transmit heat
hydrophobia
taking on water
cure process
ability to withstand deformation without fracture while undergoing maximum compression stress
galvanization
maintains storage life
creep
hue, chroma, value
ductility
ability of material to withstand permanent deformation without a fracture under elongation stress
setting time
period of time when the material becomes as hard as it will be
die
force of the union of one substance with another
imbibition
slow bending of material under its own weight
toughness
maximum amount of resistance before penetration or scratching can occur
yield strength
tendency of amalgam to deform under constant pressure
elasticity
amount of pulling stress required to rupture the material
initial set
chemical release of heat
color
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Wax impression material is used

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Chalk, rouge, tripoli, and tin oxide

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Alginate is which type of impression material?

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