Alloys Used In Dentistry

Alloys Used In Dentistry

Classify dental casting alloys. Give the properties of each constituent.
Or
Describe briefly about types of alloys used in dentistry.
Answer:

Alloy: An alloy is defined as a metal containing two or more elements, at least one of which is metal, and all of which are mutually soluble in the molten state.

Dental Alloys Types

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Classification of Dental Casting Alloys:

1. According to use:
   • Alloy for all metal and resin veneer restorations.
   • Alloys for metal-ceramic restoration
   • Alloys for removable dentures.
2. According to yield strength and percentage elongation:
   • Type I: Soft
   • Type II: Medium
   • Type III: Hard
   • Type IV: Extra hard.
3.  According to nobility:
   • High noble metal alloy − containing >40% Au and > 60 wt. % of noble metals.
   • Noble metal alloys contain>25 wt% % of noble metals.
   • The predominantly base metal alloy contains < 25 wt% %  of noble metals.
4. According to major elements:
   • Gold alloy
   • Silver alloy
   • Palladium alloy
   • Nickel alloy
   • Cobalt alloy
   • Titanium alloys.
5. According to the three major elements:
   • Gold-palladium-silver
   • Palladium-silver-tin
   • Nickel-chromium-molybdenum
   • Cobalt-chromium-molybdenum
   • Iron-nickel-chromium
   • Titanium-aluminium-vanadium.
6. According to the number of alloys present:
   • Binary—two elements
   • Ternary—three elements
   • Quaternary—four elements.

Dental Casting Alloys

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