Table 1.

Compressive modulus and compressive strength testing of scaffolds

Microsphere size (µm)	Polymer concentration	Compressive modulus (MPa)	Compressive strength (MPa)
300–355	Control	178 ± 2	14 ± 1.9
	0.25%	147 ± 11	9.3 ± 0.1
	1%	160 ± 44	14 ± 0.8
	2%	109 ± 12	6.2 ± 2.0
425–600	Control	170 ± 58	3.7 ± 0.9
	0.25%	105 ± 39	12 ± 2.2
	1%	317 ± 103	11 ± 3.0
	2%	202 ± 25	9.7 ± 0.8
600–710	Control	281 ± 107	12 ± 3.9
	0.25%	242 ± 36	5.9 ± 1.7
	1%	258 ± 51	4.4 ± 1.2
	2%	223 ± 34	8.9 ± 2.4

All units are in MPa. All errors displayed are standard errors of the mean. Across three different sizes of microspheres (300–355, 425–600 and 600–710 µm), and four different nanofiber concentrations (0%, 0.25%, 1% and 2%), no statistical difference was found through two-way ANOVA (n = 3) for evaluation of compressive modulus. The high variability of individual scaffold groups is likely due to the random nature of the sintering process.