chapters 1, 2, & 3 Flashcards
auxiliary materials
fabricated restorations
wax, algenant
tensile force
pulling apart, opening
compressive force
more towards each other, biting
shearing force
front teeth cutting something
torsion
twisting force; both compressive and tensile
flexure
bending force; compressive, tensile, and shearing combinded
strain
amount of change force produces in an object
stress-strain cure
relationship between stresses and strains
fracture toughness
energy needed to fracture material
ultimate strength
point of fracture
resilience
energy needed to permanently deform a material
fatigue failure
resulting fracture from repeated stress causing small flaws over time
creep
small changes in shape from continuous compressive force
stress relaxation
like creep; slow decrease in force over time
stress concentration
stress focused around defects
solubility
disolvability (low is desirable)
water sorption
ability to absorb water (undesirable)
corrosion
deterioration of material (undesirable)
galvanism
phenomenon of electrical current transmission via electrolyte solution between two dissimilar metals
galvanic shock
stimulates tooth pulp
dimensional change
expanding with heal/contracting with cold
coefficient of thermal expansion
measure of change in volume/length in relation to temp
percolation
repeated shrinking/expanding + oral fluids filling gaps
thermal conductivity
rate of heat flow through materials over time
exothermic reaction
chemical reaction that produces heat
retension
ability to maintain position without displacement under stress
wetting
degree a liquid adhesive can spread over a surface
viscosity
resistance of liquid to flow
microleakage
leakage into interface causing recurrent caries
interface
space between tooth and restoration
hue
dominant color
chroma
intensity of color
value
light vs. dark
mixing time
time to achieve homogeneous mix
working time
mixing to hard
