Preparation and Mechanical Properties of Porous Titanium Enhanced by CeO2

Abstract:

Porosity is important to osteogenesis for porous titanium implants. Higher porosity is good for enhancement of osteogenesis. But the mechanical properties of porous titanium must rapidly decrease when its porosity increases. The puzzle now is to find a porous titanium implant with high mechanical properties as well as high porosity. The novel porous titanium which fit for bone ingrowth was fabricated by traditional slurry foaming, with CeO2 as additive. Microstructure and mechanical properties were studied by scanning electronic microscope (SEM) and compression tests respectively. The results show that the pores mainly in 100-700 μm of porous titanium with the porosity of 71.6%-73.5% are all interconnected and there are many microspores (about 10 μm) on the wall of macrospores. The porous titanium enhanced by 0.2wt%CeO2 presents optimal biomechanical compatibility, whose Young’s modulus and compressive strength are 2.08 GPa and 60.19 MPa, respectively, similar to that of cortical bone

Key words:slurry foaming; porous titanium; CeO2; mechanical properties