Biocompatibility of the PCU-Sil and 3D printing. a) Cell viability for
PCU-Sil pellets, 3D-printed PCU-Sil samples, and controls obtained following a
seven-day cell culture (asterisk indicates statistical significance, p <
0.05), b) Normalized NO production after seven days in cell culture (no
statistically significant differences between all pairs, p > 0.05). c)
HPMEC activation was not observed upon exposure to PCU-Sil pellets or 3D-printed
PCU-Sil samples, as determined by intact VE-cadherin-mediated cell-cell
junctions and a quiescent pattern of actin cytoskeletal organization. (All scale
bars are 40 μm)