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22 Cards in this Set
- Front
- Back
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________alloys are the strongest and used for high stress bridges and partial denture framework.
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Type IV
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__________alloys, which are used for inlays are the weakest and have the greatest percent of elongation
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Type I
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Name the four noble metals
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gold
platinum palladium silver |
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Name the five precious metals
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gold
platinum pallidium iridium silver |
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24 carat gold is_________gold with a finess of________
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pure
1000 |
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18 carat gold is_____gold with a finess of_________
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75%
750 |
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12 carat gold is ________gold with a fineness of _________
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50%
500 |
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High noble alloys contain
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60% or more gold and other noble elements usually yellow metals
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Low noble alloys contain
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at least 25% noble metal w/gold typically being replaced by increased silver content, yellow or white metal
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Silver-pallidium alloys contain
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70% silver and 25% pallidium-white silver colored metal
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Base metal alloys contain
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alloys w/less than 25% noble elements
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________alloys are the noble alloys of choice for ceramometal restorations
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gold
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The second layer of porcelin added to a crown is the porcelin
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body/dentin
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The final layer of porcelin is the_________layer. It is the most translucent and gives the restoration a more natural appearance
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enamel/translucent
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Gold,platinum,pallidium,and silver are known as________metals
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precious
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________is the most biocompatible metal
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titanium
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________crowns, made using a platinum foil matrix are used in low stress areas
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jacket
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An all metal crown is not very esthetic but is the least likely crown to fail
true or false |
true
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Alloys used for ceramometal crowns may also be used for all metal crowns
true/false |
false
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Nickel chromium and chromium cobalt alloys are classified as__________alloys
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non-precious
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________causes porcelin powder to change into a solid
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sintering
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The___________layer of porcelin is the first layer which covers the oxide layer of metal.
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opaque
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