Classify Dental Alloys Used In Dentistry

Classify Dental Alloys Used In Dentistry

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Classification of Dental Alloys

• According to use:
  • Alloy for all metal and resin veneer restorations.
  • Alloys for metal-ceramic restoration.
  • Alloys for removable dentures.
•  According to yield strength and percentage elongation:
  • Type I: Soft
  • Type II: Medium
  • Type III: Hard
  • Type IV: Extra-hard.

Classification Of Dental Alloys

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• According to nobility:
  • High noble metal alloy: Containing > 40% Au and > 60 wt % of noble metals.
  • Noble metal alloys: Contains > 25 wt % of noble metals.
  • The predominantly base metal alloy contains: < 25 wt% of noble metals.
• According to major elements:
  • Gold alloy
  • Silver alloy
  • Palladium alloy
  • Nickel alloy
  • Cobalt alloy
  • Titanium alloys.

Dental Alloys Classification

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• According to three major elements:
  • Gold: Palladium- silver
  • Palladium: Silver-tin
  • Nickel: Chromium-molybdenum
  • Cobalt-chromium-molybdenum
  • Iron-nickel-chromium
  • Titanium-aluminium-vanadium.
• According to a number of alloys present:
  • Binary: Two elements
  • Ternary: Three elements
  • Quaternary: Four elements.