重付加型シリコーンゴム印象材の組成と流動特性 Composition and Flow Properties of Commercial Polyaddition-type Silicone lmpression Materials

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著者

    • 泉田 明男 IZUMIDA Akio
    • 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
    • 細谷 誠 HOSOTANI Makoto
    • 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
    • 笠原 紳 KASAHARA Shin
    • 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
    • 依田 正信 YODA Masanobu
    • 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, School of 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

抄録

The purpose of this study was to investigate flow characteristics of four commercial polyaddition-type silicone impression materials (Regular Type) before mixing.<BR>Base and catalyst pastes were filler and polymer separated by a centrifugal separator with benzene for component analysis. As a result, weight fraction of filler was 39-55% and the chief ingredient was silica. The main polymer of base and catalyst pastes was polydimethylsiloxane. Especially, base polymer included hydrogen polydimethylsiloxane which was a crosslinking agent. The molecular weight (Mw) of these polymer was mostly about 40, 000-70, 000.<BR>The viscosities of these pastes before mixing were measured by a cone-plate viscometer. Both base and catalyst pastes demonstrated pseudoplastic behavior which is the non-Newton flow. Particularly, base pastes showed thixotropic properties because of their clear hysteresis curves and time dependency on the viscosity. One of the base pastes had a yield value.<BR>The inorganic filler significantly affected on flow characteristics of impression materials. The results suggested a means to manufacture impression materials with superior characteristics for working.

収録刊行物

  • 日本補綴歯科學會雜誌 = The journal of the Japan Prosthodontic Society

    日本補綴歯科學會雜誌 = The journal of the Japan Prosthodontic Society 44(4), 504-511, 2000-08-10

    Japan Prosthodontic Society

参考文献:  16件中 1-16件 を表示

被引用文献:  5件中 1-5件 を表示

各種コード

  • NII論文ID(NAID)
    10008156033
  • NII書誌ID(NCID)
    AN00197911
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    03895386
  • データ提供元
    CJP書誌  CJP引用  J-STAGE 
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