A prosthesis as recited in claim 21, wherein said bio-inert material includes at least one constituent selected from the group, consisting of:(a) metals such as gold, platinum, titanium and metal alloys; (b) carbon in its appropriate modifications, such as pyrolytic carbon (graphite); carbon compounds, such as silicon carbide (SiC), titanium carbide (TiC), boron carbide (B4 C); (c) special ceramic