白金鉄磁石合金の歯科鋳造による可撤式クラウン・ブリッジへの応用に関する基礎的検討  [in Japanese] Basic Investigation of Fe-Pt-Nb Magnetic Alloys to Removable Crowns and Bridges by Casting  [in Japanese]

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Author(s)

    • 菅野 太郎 KANNO Taro
    • 東北大学歯学部歯科補綴学第一講座 1st Department of Prosthetic Dentistry, School of Dentistry, Tohoku University
    • 奥野 攻 OKUNO Osamu
    • 東北大学歯学部歯科理工学講座 Department of Dental Materials Science, Schoolof Dentistry, Tohoku University
    • 木村 幸平 KIMURA Kohei
    • 東北大学歯学部歯科補綴学第一講座 1st Department of Prosthetic Dentistry, School of Dentistry, Tohoku University

Abstract

The purpose of this study was to examine effects of magnetizing, methods on attractive forces in disk-type model and crown-type model which consisted of two kinds of Fe-Pt magnetic alloys (Fe-39.5Pt-0.75 Nb (mole%), Fe-39.5 Pt-0.65 Nb-0.1Si (mole%)). In addition the surface roughness and adaptability of the inner surfaces were examined in the crown-type model.<BR>The results were as follows:<BR>1. Surface roughness (crown-type samples)<BR>There was no significant difference between the alloys. As for the alloys, surface roughness was greater than that of the metal model.<BR>2. Adaptability (crown-type samples)<BR>The adaptability of the crown-type was loose. In order to keep the frictional forces as small as possible, the expansion of the investment was intentionally increased by the adjustment of the L/P ratio.<BR>3. Attractive forces<BR>1) Disk-type samples<BR>The attractive force of the disk-type was large when magnetized at four-poles on a plane and the attractive force of a sample was 734 gf on the average.<BR>2) Crown-type samples<BR>The attractive force observed with crown-type (magnetized along the crown axis, Fe-39.5 Pt-0.65 Nb-0.1 Si (mole%)) showed 536 gf on the average. This value was sufficient for retaining removable crowns and bridges.

Journal

  • Nihon Hotetsu Shika Gakkai Zasshi

    Nihon Hotetsu Shika Gakkai Zasshi 42(3), 424-430, 1998-06-10

    Japan Prosthodontic Society

References:  23

Cited by:  3

Codes

  • NII Article ID (NAID)
    10008169729
  • NII NACSIS-CAT ID (NCID)
    AN00197911
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    03895386
  • Data Source
    CJP  CJPref  J-STAGE 
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