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46 Cards in this Set
- Front
- Back
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Biologic
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harmful to oral cavity?
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density
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mass of object (g/cm^3)
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boiling & melting points
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liquid changes to gas
gas changes to liquid |
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vapor pressure
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tenedency of liquid to become a gas
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heat capacity
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highest amt. of heat that can be absorbed
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heat of fusion
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amt. of energy needed to melt
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heat of vaporization
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amt. of energy needed to boil
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coefficient of thermal expansion
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change in volume of a material in relationship to change in temp.
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percolation
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heating and cooling of mouth
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electrical conductivity
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pulp sensitivity
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abrasion resistance
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wear resistance
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solubility
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dissolve in water
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water sorption
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take in water
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radiolucent
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gray to black
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radiopaque
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white to gray
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viscosity
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ability of material to flow/wet tooth surface
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etching
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helps material bond to tooth surface
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brinell
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measures indentation by increasing load on object before indentation
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knoop
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microhardness, used for brittle material
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rockwell
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depth of penetration
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vickers
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similar to rockwell
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durometer
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how much of a dent is created
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hue
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green, blue, red
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chroma
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strength of color
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value
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gray scale
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elasticity
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compression, push and pull
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strain
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forces that come from opposite directions
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stress
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force develops within object (lbs/in^2)
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modulus of elasticity
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stiffness
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ultimate strength
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measure of strength that exceeds strength of object
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compression
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pushing
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tension
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pulling
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shear
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slippage
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torsion
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twisting
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bending
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combination of compression, tension, shear, torsion
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poission's ratio
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strain in direction of stress:strain perpendicular to stress
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resilience
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ability to absorb energy w/o deformation
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toughness
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absorb energy to failure point
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fracture toughness
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amt. energy required to fracture material w. a crack in it
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stress relaxation
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stress removed slowly over time
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stress concentration
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stress increased around specific defects
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vapor pressure
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increases w. temperature, liquid's tendency to evaporate and become a gas
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thermal conductivity
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rate of heat flow through a material (ie- pulpal tissue)
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Heat capacity
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amount of energy needed to raise the temperature of 1 unit of mass of that material by 1 degree C
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coefficient of thermal expansion
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measure of change
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galvanic shock
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result of electricity flowing from metal object to a metal restoration and through pulp
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