In order to analyze the degradation characteristics of the scaffold, we prepared a disc-shaped scaffold. (Diameter = 12 mm, height = 2 mm) The fabricated scaffold was pre-wetted in 70 % ethanol, and then placed in each of 4 ml phosphate buffered saline solution (PBS, pH 7.4). The change in weight of the scaffold in a shaking incubator at 37 °C for 7 weeks was measured. The degradation rate of the scaffold was calculated by Eq. (4).4\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ \mathrm{Degradation}\kern0.5em \mathrm{rate}\left(\%\right)=\frac{Initial\kern0.5em weight- loss\kern0.5em weight}{Initial\kern0.5em weight}\times 100 $$\end{document}Degradationrate%=Initialweight−lossweightInitialweight×100