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General view of TPMS-based models. (A) Triangulation of a nonclosed implicit surface: P-surface, D-surface and G-surface. (B) Triangulation of typical closed implicit surface: P-surface, D-surface and G-surface. The cylindrical graded porous structure with the pore diameter distribution range from (C) 300–500 μm, (D) 200–600 μm and (E) 100–700 μm. The top and bottom view of each structure is shown in the upper left corner. TPMS = triply periodic minimal surface.
