Artificial joint, in particular an endoprosthesis, an...

Details Artificial joint, in particular an endoprosthesis, an... Artificial joint, in particular an endoprosthesis, an...

A - Human Necessities

61

F

A61F 2/30 (2006.01) A61F 2/38 (2006.01) A61F 2/00 (2006.01)

Patent

CA 2124447

Abstract An artificial joint, especially an endoprosthesis for the human knee joint, con-sisting of at least two mutually moving joint sections, a joint head and a glenoid cav- ity, with toroidal joint surfaces, which have functional surfaces with different circu- lar cutting contours in mutually perpendicular planes - a longitudinal and a trans- verse plane - whereby the ratio of curvature of the functional surfaces in each of the planes is convex-convex, convex-concave or concave-concave, and the mutual jointgeometry of the functional surfaces is determined in each of the two planes by ajoint chain with two joint axes (dimeric joint chain) which run through the centres of rotation of the functional surfaces with the radii of the appropriate cutting contours.

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