BIOMIMETIC COATING OF BONE-LIKE APATITE ON GLASS BEADS

概要

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Soda lime glass beads were chemically treated by either an aqueous solution of NaOH(3mol/l) or a hydrogen peroxide solution(30vol%)containing TaCl_5 in 5×10^3 mol/l or by both of them. The treated samples ware soaked up to 14 days in a simulated body fluid(SBF):Na^+142.0, K^+5.0, Ca^<2+> 2.5, Mg^<2+>1.5, Cl^-147.8, HCO_3^-4.2, HPO_4^<2->1.0, SO_4^<2->0.5(in 10^<-3>mol/l), or in another solution 1.5 times as concentrated as SBF(1.5SBF). The SBFs were kept at 36.5°C and at 7.25 in pH. Apatite was deposited on the samples treated with the NaOH solution, the H_2O_2/Ta solution, and both of them before soaking in 1.5SBF. Ta(V)ions were present on not only the samples treated with the H_2O_2/Ta solution but those treated with both NaOH and the H_2O_2/Ta solutions. It was concluded that Ta(V)ions on the surface layer had ability of inducing apatite deposition, and the ability was enhanced by the coexitence with silanol groups.
社団法人日本材料学会の論文
1998-03-15