Grindability of Dental Magnetic Alloys

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  • HAYASHI Eisei
    Division of Fixed Prosthodontics, Graduate School of Dentistry, Tohoku University
  • KIKUCHI Masafumi
    Division of Dental Biomaterials, Graduate School of Dentistry, Tohoku University
  • OKUNO Osamu
    Division of Dental Biomaterials, Graduate School of Dentistry, Tohoku University
  • KIMURA Kohei
    Division of Fixed Prosthodontics, Graduate School of Dentistry, Tohoku University

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Abstract

In this study, the grindability of cast magnetic alloys (Fe-Pt-Nb magnetic alloy and magnetic stainless steel) was evaluated and compared with that of conventional dental casting alloys (Ag-Pd-Au alloy, Type 4 gold alloy, and cobalt-chromium alloy). Grindability was evaluated in terms of grinding rate (i. e., volume of metal removed per minute) and grinding ratio (i. e., volume ratio of metal removed compared to wheel material lost). Solution treated Fe-Pt-Nb magnetic alloy had a significantly higher grinding rate than the aged one at a grinding speed of 750-1500m·min-1. At 500m·min-1, there were no significant differences in grinding rate between solution treated and aged Fe-Pt-Nb magnetic alloys. At a lower speed of 500m·min-1 or 750m·min-1, it was found that the grinding rates of aged Fe-Pt-Nb magnetic alloy and stainless steel were higher than those of conventional casting alloys.

Journal

  • Dental Materials Journal

    Dental Materials Journal 24 (2), 163-171, 2005

    The Japanese Society for Dental Materials and Devices

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