Figure 5.

(a) Schematic illustration of the filament fusion test performed on the poloxamer gels. Measurements were performed on a third layer, printed with a differently-colored gel—the measurements were: filament distance (fd); filament thickness (ft); and fused filament length (fs). (b) Pictures from stereo microscopy after deposition. For enhanced contrast, the gray background in original images was replaced with a white background using Inkscape software (version 0.92). The blue lines follow the points where the pores close. (c) Plot of fused filament length normalized by filament thickness as function of the filament distance for the tested gel compositions. The lines represent nonlinear regression for each gel concentration. Statistical analysis showed significant differences (p < 0.05) between the formulations for fd < 0.485 mm. The 20% px formulation showed significantly different values compared to the other formulations up to fd = 0.550 mm.