The authors aimed to improve hydroxyapatite formation ability of Ti6Al4V, Ti-15Mo-5Zr-3Al alloy, Ti-12Ta-9Nb-6Zr-3V-O alloy (Gummetal®) and commercially pure Ti (cpTi) mesh by a combination of acid etching and apatite nuclei precipitation. Surfaces of specimens were etched with H ₂ SO ₄ for pores formation on the specimens. Thus-etched specimens were soaked in an alkalinised simulated body fluid (SBF), which was adjusted at higher pH than that of conventional SBF and this solution was subsequently heated. By this treatment, apatite nuclei were precipitated in the pores of the specimens. By a soak in the conventional SBF to check hydroxyapatite formation ability, hydroxyapatite was covered the entire surfaces of the specimens within 1 day and high hydroxyapatite formation ability was successfully shown. The adhesion strength of the hydroxyapatite film formed in the above SBF test showed larger value as increasing the surface roughness of the specimens by adjusting the above acid etching condition depending on the kinds of Ti-based alloys. This is because the adhesion of the hydroxyapatite film occurred by the mechanical interlocking effect. In addition, this method showed shape selectivity of the materials because similar hydroxyapatite formation ability could be introduced to the cpTi mesh.

中文翻译：

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酸蚀和磷灰石晶核析出相结合提高钛基合金羟基磷灰石形成能力

作者旨在通过酸蚀刻的组合提高 Ti6Al4V、Ti-15Mo-5Zr-3Al 合金、Ti-12Ta-9Nb-6Zr-3V-O 合金 (Gummetal®) 和商业纯 Ti (cpTi) 网的羟基磷灰石形成能力和磷灰石核沉淀。样品表面用 H ₂ SO _4蚀刻用于试样上的孔隙形成。将如此蚀刻的样品浸泡在碱化的模拟体液 (SBF) 中，将其调节到比常规 SBF 更高的 pH 值，然后将该溶液加热。通过这种处理，磷灰石晶核在试样的孔隙中析出。通过浸泡在传统的 SBF 中检查羟基磷灰石的形成能力，在 1 天内羟基磷灰石覆盖了试样的整个表面，并成功地显示出高羟基磷灰石的形成能力。上述SBF试验中形成的羟基磷灰石膜的附着强度随着根据Ti基合金的种类调整上述酸蚀刻条件而增加试样的表面粗糙度而显示出较大的值。这是因为羟基磷灰石膜的粘附是通过机械联锁效应发生的。此外，该方法显示了材料的形状选择性，因为类似的羟基磷灰石形成能力可以引入 cpTi 网格。