FIG. 3.

3D printing of geometrically defined macroporous constructs. (a) Schematic of geometrically defined macroscopic construct formed from Slic3r software. (b) Macroscopic images of 3D printed alg-CaCl₂ constructs of different sizes (2 × 2 cm and 1 × 1 cm) with defined geometry and porosity immediately after printing and after crosslinking for 5 min in a CaCl₂ bath. (c) Macroscopic images of 3D printed geometrically defined constructs with the four different alginate-based bioinks after crosslinking in a CaCl₂ bath. (d) Histological examination of construct microscopic structure by H&E staining reveals maintenance of pore structure. Color images are available online.