Figure 6.

Generation of an inner cavity inside a CPC scaffold. (A) Principle of the CPC (red) structure with an inner cavity, filled with support material (mc, purple). (B) Fabrication and post-plotting appearance of the cubic structure with 410 μm needles. (C) After plotting (left), pores in z-direction of the CPC part are not interconnected but closed by mc at the interface of both materials. After methylcellulose vanished (right), the pores were clearly open and interconnected (scale bars 4 mm). (D) Virtual cut of micro computed tomography of the cube and photograph of the cut cube after mc vanished, revealing the cubical-shaped cavity inside the macroporous CPC structure. More images are provided in Supplementary Figure S1.