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可控多孔結(jié)構(gòu)生物活性鈦的制備及其體外細(xì)胞培養(yǎng)
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Fabrication of Bioactive Titanium with Controlled Porous Structure and Cell Culture in Vitro
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    采用電子束熔化（EBM）成形工藝，制造具有可控多孔結(jié)構(gòu)的Ti6Al4V植入體，分析測(cè)試其微觀孔隙結(jié)構(gòu)特征、孔隙率以及力學(xué)性能。掃描電鏡觀測(cè)結(jié)果表明，所制備的鈦合金植入體孔隙結(jié)構(gòu)特征與設(shè)計(jì)結(jié)構(gòu)相符合，證明EBM技術(shù)能夠?qū)崿F(xiàn)鈦合金植入體孔隙結(jié)構(gòu)的控制；測(cè)得多孔植入體的孔隙率為60.1%，相應(yīng)的抗壓強(qiáng)度為163 MPa，彈性模量為14 GPa，與人體骨組織彈性模量相近。利用改進(jìn)的堿熱處理方法進(jìn)行表面改性，并浸泡在模擬體液中以誘導(dǎo)磷灰石的形成。體外細(xì)胞培養(yǎng)試驗(yàn)結(jié)果表明，培養(yǎng)7 d后成骨細(xì)胞在改性的試件表面大量粘附、生長(zhǎng)、增殖

    Abstract:

    One of the direct metal forming techniques, electron beam melting (EBM) process, was used to fabricate Ti6Al4V implants with controllable porous structure. The micro-structural pore characterization, porosity and mechanical properties of the fabricated implants were investigated. Scanning electron microscope (SEM) observation shows that the porous structure of fabricated samples coincide with the designed architecture. It is demonstrated that EBM process can provide accurate control over the internal pore architectures of the implant. The compressive strength of the implant with porosity of 60.1% is 163 MPa. The Young's modulus is 14 GPa, which is similar to that of cortical bone. The surface modification by improved alkali-heat treatment induces apatite formation in simulated body fluid (SBF). In vitro cell culture experiment results reveal that osteoblasts will spread and proliferate on the surface of modified specimens over a culture time of 7 d

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李 祥,王成燾,王 林,張文光,李元超.可控多孔結(jié)構(gòu)生物活性鈦的制備及其體外細(xì)胞培養(yǎng)[J].稀有金屬材料與工程,2010,39(10):1697~1701.[Li Xiang, Wang Chengtao, Wang Lin, Zhang Wenguang, Li Yuanchao. Fabrication of Bioactive Titanium with Controlled Porous Structure and Cell Culture in Vitro[J]. Rare Metal Materials and Engineering,2010,39(10):1697~1701.]
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  • 收稿日期:2009-10-10
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