metals Flashcards
(7 cards)
1
Q
alloy systems
A
classification based on corrosion resistence
2
Q
noble metals are
A
metals that do not form stable oxides at room temperature - gold, platinum, palladium
3
Q
base metals are
A
metals that will oxidize in the oral enviornment and provide corosion resistance - nickel, chromium, and cobalt
4
Q
classifications of noble content
A
high = >60% noble
titanium = >85% titanium
Noble alloy = noble >25% + platinum
Predominantly base alloy = <25% gold + platinum
5
Q
base metal alloys generally have higher
A
elastic modulus and are stiffer
6
Q
base metal often have a higher tensile strengeth (t/f)
A
true
7
Q
women or men are more sensitive to metal
A
men = .9%
women = 9%
