Patent ID: 7004975

Claim:
A joint endoprosthesis, comprising a first joint part having a metallic core, wherein the metallic core is coated, in regions that roll and/or slide on a second joint part during execution of a joint function, with a glass-ceramic composite mixture having the following composition in approximate amounts indicated (in wt. %): Component Amount (wt %) SiO 2 45–50% Al 2 O 3 15–20% ZrO 2 8–12% K 2 O 0–8% Na 2 O 0–7.5% CaO 0–2.5% TiO 2 0–1.5% and furthermore a residual amount of up to about 12.5% of an oxide selected from the group consisting of MnO 2 , Fe 2 O 3 , Co 2 O 3 and mixture thereof.