[1]State Key Laboratory of High Performance Complex Manufacturing College of Mechanical and Electrical Engineering Central South University Changsha 410083 China;
[2]Jiangxi University of Science and Technology Ganzhou 341000 China;
[3]The Key Laboratory of Carcinogenesis and Cancer Invasion of the Chinese Ministry of Education the Key Laboratory of Carcinogenesis of the Chinese Ministry of Health and Cancer Research Institute Xiangya Hospital Central South University Changsha 410078 China;
[4]Department of Oral and Maxillofacial Surgery Xiangya Hospital Central South University Changsha 410008 China;
multi-scale pores; scaffolds; additive manufacturing; chemical etching; PLLA;