[Experimental study of metallic bone and joint prostheses with plasma-sprayed ceramic coating]

In order to solve the loosening problem of endoprosthesis, a titanium-based alloy bone and joint prosthesis with plasma-sprayed ceramic coating was developed by the authors. By the fabrication powdered alumina or zirconium oxide were melted in an electric arc by a temperature of 10,000 K and sprayed onto the metallic prosthesis. The coating was 0.3 to 0.6 mm in thickness and had innumerable micropores. The pores were 50 to 200 microns in diameter. The metallic bone and joint prosthesis with plasma-sprayed ceramic coating exhibits characteristics of metal and ceramic, such as high mechanical strength, high resistance to corrosion and elution and good biocompatibility. According to our experimental study, the plasma-sprayed ceramic coating allows tissue ingrowth into its micropores and prevents the loosening of the prosthesis. Successful cases have been experienced through 10 years clinical application.