Laser Powder Bed Fusion-built Ti6Al4V Bone Scaffolds Composed of Sheet and Strut-based Porous Structures: Morphology, Mechanical Properties, and Biocompatibility

作     者：Shuai Ma Qian Tang Changbao Zhu Fuyou Wang Qixiang Feng Jun Song Rossitza Setchi Chenglong Ma Ran Tao 

作者机构：State Key Laboratory of Mechanical TransmissionsChongqing UniversityChongqing400044China College of Mechanical EngineeringChongqing University of TechnologyChongqing400054China Cardiff School of EngineeringCardiff UniversityCardiffCF243A1United Kingdom Department of OrthopedicsGeneral Hospital of Xinjiang Military RegionUrumqi830099China Center for Joint SurgerySouthwest HospitalThe Third Military Medical UniversityChongqing400038China School of Mechanical EngineeringJiangnan UniversityWuxi214122China School of Mechanical Engineering and AutomationHarbin Institute of TechnologyShenzhen518055China 

出 版 物：《Chinese Journal of Mechanical Engineering(Additive Manufacturing Frontiers)》 (中国机械工程学报（增材制造前沿）（英文）)

年 卷 期：2022年第1卷第4期

页      面：87-99页

学科分类：082304[工学-载运工具运用工程] 08[工学] 080204[工学-车辆工程] 0802[工学-机械工程] 0823[工学-交通运输工程] 

基　　金：National Natural Science Foundation of China(Grant Nos.51975073,82172429,51805052) China Scholarship Council(CSC) 

主　　题：Triply periodic minimal surface Bone repair Tissue engineering Mechanical properties Laser powder bed fusion 

摘      要：Laser powder bed fusion(L-PBF)-built triply periodic minimal surface(TPMS)structures are designed by implicit functions and are endowed with superior characteristics,such as adjustable mechanical properties and light-weight features for bone repairing;thus,they are considered as potential candidates for bone ***,previous studies have mainly focused on different TPMS *** fundamental understanding of the differences between strut and sheet-based structures remains exclusive,where both were designed by one *** consequently hinders their practical ***,we compared the morphology,mechanical properties,and biocompatibility of sheet and strut-based *** particular,the different properties and in vivo bone repair effects of the two structures are ***,the morphology characteristics demonstrate that the manufacturing errors of sheet-based structures with diverse porosities are comparable,and semi-melting powders as well as the ball phenomenon are observed;in comparison,strut-based samples exhibit cracks and thickness ***,the mechanical properties indicate that the sheet-based structures have a greater elastic modulus,energy absorption,and better repeatability compared to strut-based ***,layer-by-layer fracturing and diagonal shear failure modes are observed in strut-based and sheet-based structures,*** in vivo experiment demonstrates enhanced bone tissues in the strut-based *** study significantly enriches our understanding of TPMS structures and provides significant insights in the design of bone scaffolds under various bone damaging conditions.