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Noble alloys in dentistry.

L Gettleman1

  • 1School of Dentistry, University of Louisville, Kentucky.

Current Opinion in Dentistry
|April 1, 1991
PubMed
Summary
This summary is machine-generated.

Dental casting materials include noble metal alloys (gold, palladium) and base metal alloys (nickel, chromium). Noble alloys are used for crowns and inlays, while base metal alloys offer lower cost and higher strength. Direct gold also remains popular.

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Area of Science:

  • Dental materials science
  • Biomaterials engineering
  • Metallurgy

Background:

  • Noble metal alloys (gold, palladium, platinum, iridium, ruthenium) are traditional materials for dental castings.
  • Silver is often included but is not a noble metal.
  • Base metal alloys (nickel, chromium, beryllium) are increasingly used due to cost and mechanical advantages.

Purpose of the Study:

  • To review the current landscape of dental casting alloys.
  • To highlight the applications and trends in noble and base metal alloy usage.
  • To note the continued relevance of direct gold and new patent developments.

Main Methods:

  • Literature review of dental casting materials.
  • Analysis of alloy compositions and applications.

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  • Identification of market trends and material usage.

    • Main Results:

    • Noble alloys are primarily used for ceramic backing, inlays, onlays, and unveneered crowns.
    • Base metal alloys are favored in the US for their cost-effectiveness and superior mechanical properties.
    • Noble alloys often serve as controls in research for alternative dental materials.

    Conclusions:

    • The dental casting market is characterized by the continued use of noble alloys alongside the rise of base metal alloys.
    • Direct gold (gold foil) maintains a niche following, supported by recent patent activity.
    • Material selection balances cost, mechanical properties, and application requirements in restorative dentistry.