| 摘要 |
<p>Disclosed are a porous hydroxyapatite bioceramic and a preparing method thereof. The porous hydroxyapatite bioceramics of the present invention has suitable pore diameters and distribution, porosity, pore-through situations, and pore surface morphology for bone tissue growth, and not only has large pores allowing a new bone to grow into, but also has abundant flake-shaped pores in pore walls, thus transferring osteogenesis. In the preparing method of the present invention, diameters and distribution of polymeric fibers are arranged appropriately in a die in advance, aqueous hydroxyapatite slurry is frozen and solidified by using orientated temperature field to make hydroxyapatite powder particulates to agglomerate and rearrange under of pushing and thrusting of an orientated grown ice crystal, a resulting ice block is frozen and dried to sublime the ice crystal before sintering is performed. The method can perform fine regulating may be performed on the porous microstructure. And porous hydroxyapatite prepared by the present invention has the high pore-through rate and the high porosity, suitable for bone tissue growth.</p> |
