Table 3.

Comparison between FDM Technology and 3D P&P Technology.

	FDM Technology						3D P&P
Porosity	50%	60%	70%	80%	90%	95%	97%
Integrity	H	H	H	M	L	EL	H
Surface Detail	H	H	M	L	EL	EL	H
S/V	5.0	4.0	3.0	2.0	1.0	0.5	15.5

When the porosity in the FDM-scaffold increases, the surface smoothness and S/V decrease. When printing at high porosity, FDM technology cannot keep surface details at a high level or good integrity or large S/V, while 3D printing and perfusion (3D P&P) technology can generate scaffolds with high porosity, high anatomical-shape surface detail, good integrity, and large S/V. H = high, M = medium, L = low, EL = extreme low.