3D打印Ti6Al4V鈦合金支架的力學性能及生物相容性

3D打印Ti6Al4V鈦合金支架的力學性能及生物相容性Mechanical properties and biocompatibility of 3D printing Ti6Al4V titanium alloy scaffolds

以3D打印技術制備的多孔Ti6Al4V鈦合金支架為研究對象，研究其顯微結構特征與力學性能的關系，利用骨髓間充質干細胞研究多孔鈦合金支架的生物相容性，以及在家兔全層骨缺損模型中研究支架周圍骨質的生長情況。結果表明：3D打印的多孔Ti6Al4V鈦合金支架的力學性能受其多孔特性的影響，具有較適合人體需求的初始強度；同時材料具有良好的細胞生物相容性；且多孔支架中的立體網格結構為細胞提供了生長空間，增加了骨髓間充質干細胞的增殖能力，促進了鈦合金支架微孔中骨組織長入的速度。

Taking titanium alloy Ti6Al4V porous scaffolds by 3D printing as research object, the relationship between the microstructure characteristics and the mechanical properties was preliminarily investigated. Moreover, the bone marrow mesenchymal stem cells were used to investigate the biological compatibility, and the in vivo bone ingrowth ability of the Ti6Al4V porous scaffolds in a rabbit full-thickness bone defect model was detected. The results show that the mechanical properties of Ti6Al4V porous scaffolds prepared by 3D printing are affected by the porous microstructures with the incipient intensity that is suitable for human body. The Ti6Al4V porous scaffolds also have good biocompatibility and absorbability. The detailed grid structure in Ti6Al4V porous scaffolds provides a unique space for cells to grow, which can increase the proliferative ability of the bone marrow mesenchymal stem cells, and promote the ingrowth speed of the surrounding bone tissue in prosthetic microporous.

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