フッ化物イオンを添加したカルシウムケイ酸塩ガラスの構造と骨石灰化

概要

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The in vitro bioactivity, in terms of apatite-forming ability, of calcium silicate glasses containing 10 mol% fluoride ions in the NaF-CaO-SiO_2 system was examined by soaking in Kokubo's simulated body fluid (SBF) at 36.5℃ for 7 d. The surface structure of the glasses was examined by thin-film X-ray diffraction (TF-XRD) and Fourier transform infrared reflection spectroscopy (FT-IR) in order to confirm the apatite deposition. The structure of the calcium silicate glasses was examined by ^<29>Si magic angle spinning-nuclear magnetic resonance spectroscopy (MAS-NMR) and X-ray photoelectron spectroscopy (XPS). Three calcium silicate glasses containing 10 mol% fluoride ions had different apatite-forming abilities. In the case of CaO/SiO_2 = 1, the apatite-forming ability of 10NaF ・ 45CaO ・ 45SiO_2 was lower than that of 50CaO-50SiO2. This indicated that the addition of fluoride ions suppressed the apatite-forming ability, irrespective of the structural similarity of the silicate network based on the ratio of CaO/SiO_2 between the glasses.
2003-10-01