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Fabrication and morphology of hot dog‐like scaffolds (HD‐AKT). a) The schemata of preparation of HD‐AKT, combining 3D printing and bidirectional freezing to realize 3D printed scaffolds containing rods with aligned lamellar microstructure. b–e) 3D micro‐CT images and f,g) 2D micro‐CT images of HD‐AKT from different views showing the scaffold structure, which is hollow tube macrospores embedded by bioceramic rods with the uniformly aligned lamellar structure of rods.
