Inorganic polyphosphate adsorbed onto hydroxyapatite for guided bone regeneration: An animal study

  • DOI Kazuya
    Department of Advanced Prosthodontics, Hiroshima University Graduate School of Biomedical and Health Sciences
  • KUBO Takayasu
    Department of Advanced Prosthodontics, Hiroshima University Graduate School of Biomedical and Health Sciences
  • TAKESHITA Ryou
    Department of Advanced Prosthodontics, Hiroshima University Graduate School of Biomedical and Health Sciences
  • KAJIHARA Shiho
    Department of Advanced Prosthodontics, Hiroshima University Graduate School of Biomedical and Health Sciences
  • KATO Shinichi
    Regenetiss Incorporation
  • KAWAZOE Yumi
    Regenetiss Incorporation
  • SHIBA Toshikazu
    Regenetiss Incorporation
  • AKAGAWA Yasumasa
    Department of Advanced Prosthodontics, Hiroshima University Graduate School of Biomedical and Health Sciences

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説明

Inorganic polyphosphate (poly(P)) is recognized as a therapeutic agent that promotes fibroblast growth factor and enhances osteogenic differentiation, and in vivo, when adsorbed onto interconnected porous calcium hydroxyapatite (IP-CHA) enhances bone regeneration. The present study focused on the effect of poly(P) adsorbed onto IP-CHA granules (Poly(P)/IP-CHA) in guided bone regeneration (GBR). Dental implants were placed into the edentulous mandibular areas of five Beagle-Labrador hybrid dogs with screw expose on the buccal side, and then bone defects were filled Poly(P)/IP-CHA (test) or IP-CHA (control). After 12 weeks, histological evaluation and histomorphometrical analysis were performed. Newly-bone formation around exposed implant screw was clearly detected in the test-group. The ratio for regenerated bone height in the test group versus the control-group was 85.6±20.2 and 62.6±23.8, respectively, with no significant difference, while, that for bone implant contact was significantly higher (67.9±11.8 and 48.8±14.1, respectively). These findings indicate that Poly(P)/IP-CHA enhances bone regeneration in GBR.

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