Compressive strengths of the scaffolds in dry and wet state were shown at Fig. 7. Compressive strength of experimental group was about 3.12 times higher than the control group in dry state at 25 °C. The compressive strengths of all groups were tended to be decreased dramatically in wet state than those in dry state. However, compressive strengths of experimental group were higher 3.08 times and 1.88 times at EtOH/PBS (25 °C) and EtOH/PBS/DMEM (37 °C) solution than the control group, respectively. Therefore, the experimental specimens are considered to be able to compensate for decrement of the mechanical strength of the control group in wet state. NPR scaffolds were improve the strength in wet environment compared with control scaffolds.Fig. 7Compressive strengths for the scaffold in dry and wet state