Composite material by titanium micro-porous structure and surface treatment for applying VAD

Abstract

Titanium(Ti) is widely used for various implantable metallic materials depending on their high biocompatibility. We also have studied Ti scaffold for applying inflow and outflow's cannula and blood contacting surroundings of VAD. To promote early new ingrowth of vascular intima, our concept is focusing on the structural improvement by the micro powder sintering, and the chemical modification of Ti surface by the hydrophilic urethane treatment. For evaluating those structural advantages to relate to the promotion of neointima, the porosity, the mechanical strengths and the tissue invasions, were studied. And also for checking the advantages with respect to the chemical modification of Ti, the hydrophilicity, the microscopic and the optical chemical analyses were conducted for our specimens. Those results indicated that by combining the advantages of the structural customizing and the chemical modifications, the composite Ti would be proposed as the promotive scaffold.