HAコーティング層に結晶学的変化を認めた撤去症例 Removed Case of an Implant Which Showed Crystallographic Changes in HA-coating Layer

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An AQB implant is an HA-coating implant and a simple one-piece column type. It is made of pure titanium on which crystalline HA is coated by a plasma spraying technique.<br/> In this clinical case, one AQB implant was removed by bone resorption caused by an infection and inflammation, three years after installation.The HA coating surface of a new AQB and the removed AQB implants was examined crystallographically by SEM, EDS, and XRD. The HA-coating of the new AQB was 35-100μm in thickness, and 1-10μm in pore size, and contained a small amount of β-TCP. The HA-coating was composed of an aggregate of needle-like single crystals and polycrystals. The Ca/P ratio of their HA crystals was 4.5,much higher than the 1.67 of stoichiometric HA. The higher Ca/P originated in containing CaO in the HA-coating. In the removed implant,needle-like crystals dissolved by the inflammation,and the Ca/P ratio decreased to 1.9, slightly higher than 1.67. XRD revealed the dissolution of needle-like crystals and the presence of CaO.<br/>

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  • 日本口腔インプラント学会誌 = Journal of Japanese Society of Oral Implantology

    日本口腔インプラント学会誌 = Journal of Japanese Society of Oral Implantology 15(2), 216-222, 2002-06-30

    Japanese Society of Oral Implantology

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各種コード

  • NII論文ID(NAID)
    10008957519
  • NII書誌ID(NCID)
    AN10072606
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    09146695
  • データ提供元
    CJP書誌  CJP引用  J-STAGE 
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