Preparation of Porous Hydroxyapatite/α-Tricalcium Phosphate Composites by a Colloidal Process

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Porous hydroxyapatite (HAp)/α-tricalcium phosphate (α-TCP) composites were prepared by a colloidal process. HAp/α-TCP mixed powder was ultrasonically dispersed in an aqueous solution containing an optimum amount of polycarboxylic acid ammonium as polymer dispersant. After the colloidal process, polymethyl methacrylate (PMMA) was added to the slurries, followed by dehydration. A pressure filtration was found to be effective in avoiding the gravity segregation of PMMA. Numerous spherical pores with 100 \\micron in mean diameter were introduced in the composites by mixing PMMA, which was burned out during sintering. The shape, size and volume fraction of pores could be controlled by those of PMMA added to the composites. The bending strength of HAp/α-TCP composites depended strongly on the porosity; the strength decreased exponentially with increasing the porosity. These composites may demonstrate higher solubility and faster bone growth than HAp alone.

収録刊行物

  • Materials transactions

    Materials transactions 43(6), 1332-1335, 2002-06-01

    公益社団法人 日本金属学会

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各種コード

  • NII論文ID(NAID)
    10012324355
  • NII書誌ID(NCID)
    AA1151294X
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    13459678
  • NDL 記事登録ID
    6200491
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z53-J286
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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