耐火模型用マグネシア系コーティング材が純チタン鋳造体反応層に与える影響  [in Japanese] Influence of Magnesia Coating Materials for Refractory Models on Reactive Layer of Pure Titanium Cast  [in Japanese]

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Author(s)

    • 森口 愛 MORIGUCHI Ai
    • 大阪歯科大学大学院歯学研究科歯科補綴学専攻 Graduate School of Dentistry (Prosthodontics), Osaka Denta1 University

Abstract

Magnesia coating materials for refractory models were produced to improve a reactive layer of the pure titanium denture base cast using phosphate-bonded investment, and various properties of coating samples using the coating refractory models were compared with those of control samples made by a conventional investing method. The results were as follows:<BR>A small residual investment was observed on the coating samples removed from the mold.<BR>The surface roughness of coating samples was greater than that of control samples.<BR>The hardness of coating samples was lower than that of control samples in the depth range from the surface to about 45μm.<BR>As for coating samples, the microstructure of the surface of the castings showed almost no evidence of a corroded zone, while that of control samples exhibited a layered structure of characteristic pure titanium castings.<BR>Use of an electron probe microanalyzer (EPMA) to determine distribution of various elements in the superficial layer of castings revealed a reduced reactive layer containing impurity elements in coating samples, and a reactive layer containing Si and P in control samples.<BR>These results suggested that it is possible to improve a reactive layer of pure titanium castings using phosphate-bonded investment by magnesia coating of the surface of the refractory models.

Journal

  • Nihon Hotetsu Shika Gakkai Zasshi

    Nihon Hotetsu Shika Gakkai Zasshi 44(2), 185-197, 2000-04-10

    Japan Prosthodontic Society

References:  25

Cited by:  4

Codes

  • NII Article ID (NAID)
    10008155007
  • 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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