Fig. 4

Compression, swelling, growth factor release, and degradation testing of IGMs. (a) Compressive stress-strain curves for different IGMs. (b) Statistical analysis of the compression modulus. (c) Trend in swelling ratio for different IGMs. (d) Statistical analysis of swelling ratio after 90 min in (c). (e) Whole blood, PRP, and DPBS. (f) Schematic of the growth factor release test. Cumulative release of FGF (g), EGF (h), and VEGF (i) for different IGMs. (j) Statistical analysis of total growth factor release amount after 7 d in (g, h, and i). (k) Trend in weight loss rate for different IGMs. (j) Statistical analysis of weight loss rate after 15 d in (k) for different IGMs.