Microstructure development of Ti scaffold by laser powder bed fusion with chemical polishing and its mechanical properties,biocompatibility  

作　　者：Changfu Lu Jing Chen Teng Ma Yuxin Chen Da Zeng Yiliang Gan Youwen Yang 

机构地区：[1]Double Medical Technology Inc.,Xiamen,China [2]Institute of Additive Manufacturing,Jiangxi University of Science and Technology,Nanchang,China [3]Key Laboratory of Construction Hydraulic Robots of Anhui Higher Education Institutes,Tongling University,Tongling,China [4]College of Engineering and Applied Science,Nanjing University,Nanjing,China

出　　处：《Biosurface and Biotribology》2024年第2期52-62,共11页生物表面与生物摩擦学（英文）

基　　金：Jiangxi Provincial Cultivation Program for Academic and Technical Leaders of Major Subjects,Grant/Award Number:20225BCJ23008;Jiangxi Provincial Natural Science Foundation,Grant/Award Number:20224ACB214008;Xiamen Major Science and Technology Plan Program,Grant/Award Number:3502Z20221014;National Natural Science Foundation of China,Grant/Award Number:52165043;Anhui Natural Science Foundation,Grant/Award Number:2308085ME171。

摘　　要：Titanium(Ti)dental scaffolds are widely used in dental prosthetics due to their excellent mechanical properties and biocompatibility.However,conventional Ti scaffolds manufactured through machining often do not fit perfectly with the bone defect site.Laser powder bed fusion(LPBF)technology enables the personalised manufacturing of custom-made Ti scaffolds.A custom-made Ti scaffold was prepared using LPBF and its surface roughness was improved through chemical polishing.To enhance the surface roughness,a nitric acid mixed solution with a specific composition of HF:HNO_(3):C_(3)H_(6)O_(3)=2:2:3 was used.The polishing mechanism was investigated by adjusting the F/Ti ratio to control the formation and dissolution of the oxide film.As a result,the surface of the Ti scaffold after polishing exhibited a smooth and flat appearance compared to the LPBF part,with a reduced surface roughness(Ra)of 1.23±0.19μm.The custom-made Ti scaffold also demonstrated favourable mechanical properties,with a bending strength of 335.18±33.62 MPa and stiffness of 2.13±0.21 GPa.Furthermore,in vitro cell tests confirmed the excellent biocompatibility of the custom-made Ti scaffold.The authors present a feasible strategy for the further clinical application of custom-made Ti scaffolds,offering enhanced surface properties and addressing the limitations of conventional machining methods.

关 键 词：additive manufacturing DENTAL material property surface roughness 

分 类 号：TG146.23[一般工业技术—材料科学与工程]