浆料发泡法制备生物活性多孔钛及其性能

Fabrication and Characterization of Bioactive Porous Titanium

应用传统的浆料发泡法,通过孔隙优化,成功制备出力学性能与骨匹配的多孔钛。扫描电镜分析发现其孔隙相互连通成三维网状结构;经碱热处理的多孔钛在模拟体液中浸泡14d后,表面被一层类骨磷灰石覆盖,具有良好的生物活性。此多孔钛有望成为理想的负重骨缺损修复材料。

Traditional slurry foaming was successfully used to prepare the porous titanium. Microstructure and mechanical properties were studied by scanning electron microscope （SEM）, quantitative image analyses system and compression test respectively. The experimental results show the pores of the porous titanium are all interconnected and there are many micropores exist on the macropores＇ wall, the Young＇s modulus （4.15 GPa） and compressive strength （190.7 MPa） of the porous titanium with the porosity of 58vo1% are almost similar to that of the nature bone. Bioactivity evaluation in vitro shows the alkali-heat treated porous titanium is bioactive. Porous titanium with compressive strength and Young＇s modulus similar to nature bone may be a promising bone substitute material for the load bearing bone default repair.