Fabrication of Fully-Porous and Porous-Surfaced Ti-6Al-4V Implants by Electro-Discharge-Sintering of Spherical Ti-6Al-4V Powders and Their Osseointegration Ability
We have first fabricated porous-coated Ti alloy dental implants with a wide range of porosity by electro-discharging-sintering of spherical Ti-6Al-4V powders. The basic physical properties of EDS implants have been evaluated. The dependence of mechanical properties of each kind of implant such as micro-hardness and compressive strength has been also analyzed. The solid core and neck sizes between powders on porous layer generally increase with both input energy and capacitance. On the other hand, the pore size decreases with both input energy and capacitance. The micro-hardness analyses at various locations such as solid core and powders on porous layer show quietly consistent values. The compressive strengths of each implant are in the range of 39 and 452 MPa which depends on the input energy. In-vivo animal experiments showed that all the implants fabricated by current method were biocompatible and support rapid and perfect osseointegration in 2 weeks.
Xingdong Zhang, Junzo Tanaka, Yaoting Yu and Yasuhiko Tabata
W.H. Lee et al., "Fabrication of Fully-Porous and Porous-Surfaced Ti-6Al-4V Implants by Electro-Discharge-Sintering of Spherical Ti-6Al-4V Powders and Their Osseointegration Ability", Key Engineering Materials, Vols. 288-289, pp. 591-594, 2005