Fig. 4.

Mean and standard deviation of the silk fibroin scaffold's stiffness k in N/mm, residual force in N and their increase throughout the testing duration and the resultant compression rate at a 7 N load in the indentation test (cycle 1 vs. cycle 5, A 1–3, *p < 0.05). For a better comparison of these three parameters with the existing data of Sandmann et al. (2013), additional statistical analysis was performed (B1–3, *p < 0.05).