ZIRCONIUM NIOBIUM ALLOY HIP JOINT PROSTHESIS SYSTEM COMPRISING OXIDE LAYER, AND PREPARATION METHOD THEREFOR

The present invention discloses the hip prosthesis containing zirconium-niobium alloy on oxidation layer and a preparation method thereof, the hip prosthesis comprises a femoral stem, a femoral head, liners and a shell; the shell and femoral stem are prepared by using zirconium-niobium alloy powder as a raw material, and performing Sinter-HIP, cryogenic cooling and surface oxidation; the prepared shell and femoral stem are provided with partitioned trabeculae and formed by 3D printing. The problem of traditional manufacturing methods cannot process complex structures and failure of connection between sleeve and femoral handle is solved by 3D printing technology. Meanwhile, the preparation method can improve the bonding strength between trabecular bone and solid, and improve the service life of prosthesis. The bone trabeculae ensures the compressive strain values of bone tissue are in the range of 1000-3000 microstrains, which conforms to the bone growth theory and ensures the uniform growth of bone in the trabecular region. The present invention integrally realizes the excellent biocompatibility of the osseointegration interface, the bone ingrowth and a friction interface with super wear resistance and low wear rate. And the oxidation layer between the liners and femoral head realizes the friction interface has super wear resistance and low wear rate.