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

Access this Article

Search this Article



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/>


  • Journal of Japanese Society of Oral Implantology

    Journal of Japanese Society of Oral Implantology 15(2), 216-222, 2002-06-30

    Japanese Society of Oral Implantology

References:  20

Cited by:  3


  • NII Article ID (NAID)
  • Text Lang
  • Article Type
    Journal Article
  • ISSN
  • Data Source
    CJP  CJPref  J-STAGE 
Page Top