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(A) Pore unit cells (IWP) with gradually increased pore size. Three layers (Layer i, ii and iii) of graded pore distribution in (B) a cylindrical sample and (C) a spherical sample. (D) The CAD models of four different porous structure design. Yellow dotted lines show the boundaries between different layers in a graded porous scaffold. (E) Scheme illustration of the preparation process for digital light processing 3D printed porous bioceramic scaffolds.
