摘要：Bioactive scaffolds with interconnected porous structures are essential for guiding cell growth and new bone formation. In this work, we successfully fabricated three-dimensional (3D) porous $$\upbeta $$ -tricalcium phosphate ( $$\upbeta $$ -TCP)/calcium silicate (CS) composite scaffolds with different ratios by 3D printing technique and further investigated the physiochemical properties, in vitro apatite mineralization properties and degradability of porous $$\upbeta $$ -TCP/CS scaffolds. Moreover, a series of in vitro cell experiments including the attachment, proliferation and osteogenic differentiation of mouse bone marrow stromal cells were conducted to testify their biological performances. The results showed that 3D printed $$\upbeta $$ -TCP/CS scaffolds possessed of controllable internal porous structures and external shape. Furthermore, the introduction of CS decreased the shrinkage of scaffolds and improved the in vitro apatite formation activity and degradation rate. Meanwhile, compared with pure $$\upbeta $$ -TCP scaffold, the $$\upbeta $$ -TCP/CS composite scaffolds were more conducive to promote cell adhesion, spread and osteogenesis differentiation. However, when the content of CS was increased to 45%, the ions dissolution rate of the composite scaffolds was so high that leaded to the increase in pH value, which inhibited the proliferation of cells. Our results suggested that the introduction of appropriate CS into $$\upbeta $$ -TCP bioceramic is an effective strategy to prepare bioactive 3D printed bioceramic scaffolds for hard tissue regeneration.

摘要：采用计算机辅助设计技术设计多孔材料的结构。用离心灌注法将高固相含量的β-磷酸三钙(β-tricalciumphosphate,β-TCP)浆体注入多孔模具,通过改性淀粉原位凝固技术制备陶瓷坯体,最后高温烧结去除有机成分,得到β-TCP的多孔陶瓷。探讨分散剂加入量对浆料流变性能的影响,并对多孔支架材料的物相组成和显微结构进行分析。结果表明:采用该方法可以制备具有可控孔隙结构的β-TCP多孔陶瓷,这种多孔陶瓷是一种比较理想的骨组织工程支架材料。