86 / 2018-06-20 17:33:16

Computational and experimental study of porous titanium scaffolds fabricated by EBM for repairing bone defects

Electron beam melting; Titanium alloys; Bone substitutes; porous structures

全体主题 > vi. BAMOS (Biomaterials and Additive Manufacturing: Osteochondral Scaffold innovation)

Additive manufacturing techniques allow the production of porous titanium biomaterials. One of these techniques is the Electron Beam Melting (EBM). This technique offers the possibility to combine designs of unit cells will open up a broad field with many opportunities for optimal design of orthopaedic implants. In many cases, the aim is, on one hand, to fabricate three dimensional structures with an interconnected porosity suitable for tissue ingrowth and vascularization, and, on the other hand, to search for mechanical properties, such as compressive strength and elastic modulus (E), that are similar to those of human bone. Thus, stress shielding effects after implantation might be avoided. To obtain structures with greater strength capacity in the direction of loading, as according to Wolff’s law and achieve an elastic modulus similar to that of cancellous bone, gyroid lattice structures were designed and compared with others structures. This study evaluates the mechanical properties of this type of structures fabricated by EBM and orientated to repair bone defects