三种3D打印钛合金骨小梁多孔结构的力学性能及选型

Mechanical Properties and Selection of Three Bone Trabecular Porous Structures of 3D Printed Titanium Alloy

3D打印钛合金骨小梁已成为骨科关节植入物应用的新兴材料,与涂层假体相比,钛合金骨小梁具有骨长入快和骨长入好的优点,而对其力学性能的研究是探究骨小梁假体可植入性的基础。为了保证植入物的安全,目前多采用试验方式确定骨小梁结构的力学性能,进而选出最优结构型。文章对无序仿生、立方、菱形十二面体三种3D打印钛合金骨小梁进行对比分析,通过拉伸、压缩、压缩-剪切试验,发现无序仿生钛合金骨小梁的抗拉强度、抗压强度与抗压-剪强度均高于另外两种结构的骨小梁,因此认为无序仿生钛合金骨小梁结构是制备金属骨小梁髋关节假体的优选型结构。

3D printing titanium alloy bone trabecula has become a new material for orthopedic implant applications,compared with the coated prosthesis,titanium alloy bone trabecula has the advantages of faster bone growth and better bone growth,and the study of the mechanical properties is the basis to explore its implantability.In order to ensure the safety of the orthopedic implants,experimental methods are often used to determine the mechanical properties of bone trabecular structures,and then select the optimal structural type.In this paper,three 3D printed titanium alloy bone trabecular of disordered bionic,cubic and rhombohedral dodecahedron were studied.Through tensile,compression and compression-shear tests,it was found that the tensile strength,compressive strength and compressive-shear strength of disordered bionic titanium alloy bone trabecular were higher than those of the other two structures.Therefore,it is concluded that the disordered bionic titanium alloy bone trabecular structure is the optimal structure for the preparation of metal bone trabecular hip prosthesis.