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[The cast structure after vacuum-pressure casting and centrifugal casting].

W Finger, T Jung, U Quast

    Deutsche Zahnarztliche Zeitschrift
    |February 1, 1975
    PubMed
    Summary

    This study analyzed polished sections of dental crowns, finding smaller grain sizes in marginal areas compared to occlusal regions. Casting methods significantly influenced grain size, though hardness variations were inconsistent with grain structure.

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    US CLIVAR reports·2019

    Area of Science:

    • Metallurgy and Materials Science
    • Biomaterials Engineering
    • Dental Prosthodontics

    Context:

    • Understanding the microstructural properties of dental casting alloys is crucial for prosthodontic success.
    • Previous research has established general trends in grain size distribution within cast restorations.
    • Variations in manufacturing processes can lead to unpredictable material characteristics.

    Purpose:

    • To investigate the relationship between casting methods and the resulting grain size and hardness in dental crown margins and occlusal regions.
    • To evaluate the consistency of microstructural features and their correlation with mechanical properties.
    • To document piping distribution in relation to observed microstructural variations.

    Summary:

    • Polished sections revealed smaller grain sizes in the marginal areas of dental crowns compared to the occlusal regions.

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  • The casting method significantly impacted grain size, with notable variations observed.
  • Hardness differences were limited and did not consistently correlate with grain structure, presenting an unexplained phenomenon.
  • Piping distribution aligned with previously documented observations.

    • Impact:

    • Provides critical data for optimizing casting techniques to achieve desired microstructural properties in dental restorations.
    • Highlights the need for further research into the factors influencing hardness-grain structure relationships in dental alloys.
    • Contributes to the development of more predictable and durable dental prosthetics through enhanced material understanding.