Compositional Dependence of Bioactivity of Glasses in the System CaO-B2O3-SiO2: Its in vitro Evaluation

Chikara Ohtsuki, Yukio Kobayashi, Kanji Tsuru, Akiyoshi Osaka

研究成果: ジャーナルへの寄稿学術誌査読

11 被引用数 (Scopus)

抄録

The essential condition for glasses and glass-ceramics to bond to living bone is the formation of a biologically active bone-like apatite layer on their surfaces in the body. In the present study, in order to investigate fundamentally the effect of B2O3on the bioactivity of glasses and glass-ceramics, the compositional dependence of apatite formation on the surface of glasses in the system CaO-B2O3-SiO2was examined in the simulated body fluid. Substitution of small amounts of B2O3for SiO2in CaO • SiO2 formula increased the rate of apatite formation on the surface of the glass, while substitution of more than 30 mol% B2O3for SiO2 decreased it. The substitution of B2O3for SiO2in CaO~SiO2 binary glasses accelerated the dissolution of Ca(II) ion from the glasses, and hence enhanced the increasing rate of degree of supersaturation of the surrounding fluid with respect to apatite. The decrease in the apatite forming ability by substitution of large amounts of B2O3for SiO2 is attributed to the suppression of formation of silica hydrogel layer which plays an important role in apatite nucleation.

本文言語英語
ページ(範囲)693-699
ページ数7
ジャーナルJournal of the Society of Materials Science, Japan
44
501
DOI
出版ステータス出版済み - 1995

!!!All Science Journal Classification (ASJC) codes

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学

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