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Related Experiment Videos

New high-palladium casting alloys: 1. Overview and initial studies.

A B Carr1, W A Brantley

  • 1Section of Restorative and Prosthetic Dentistry, College of Dentistry, The Ohio State University, Columbus 43210-1241.

The International Journal of Prosthodontics
|May 1, 1991
PubMed
Summary

High-palladium alloys offer a cost-effective alternative to gold for dental restorations, demonstrating excellent mechanical properties. Their microstructure varies between thin and thick sections, impacting casting quality.

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Area of Science:

  • Dental Materials Science
  • Metallurgy
  • Biomaterials Engineering

Background:

  • High-palladium alloys (Pd-Cu-Ga, Pd-Ga) are increasingly popular for metal-ceramic dental restorations.
  • These alloys are significantly more affordable than traditional gold-based alloys.
  • Recent formulations exhibit superior mechanical properties suitable for dental applications.

Purpose of the Study:

  • To summarize critical melting and casting considerations for high-palladium dental alloys.
  • To provide an overview of relevant dental materials science aspects.
  • To present findings from a dental laboratory survey on these alloys.

Main Methods:

  • Evaluated melting and casting techniques for high-palladium alloys.
  • Utilized a maxillary central incisor coping as the clinical specimen shape.

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  • Employed gas-oxygen torch melting and analyzed etched as-cast microstructures.

    • Main Results:

    • Gas-oxygen torch melting yielded castings with acceptable marginal sharpness and minimal microporosity.
    • Etched high-palladium alloys displayed fine-scale multiphase microstructures.
    • Microstructural constituent proportions differed between thin and thick sections of cast specimens.

    Conclusions:

    • High-palladium alloys are viable, cost-effective materials for dental restorations.
    • Specific melting and casting techniques are crucial for optimal results.
    • Understanding microstructural variations in different sections is important for clinical success.