Importance

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Abstract

The present invention concerns an artificial joint, in particular an endoprosthesis to replace natural joints, consisting of at least two artificial joint parts with curved articulation surfaces, wherein, on each of the articulation surfaces, a contact line (k) in the shape of the arc of a circle is formed, which is a section of a contact circle with a center (M), lying in a plane. The articulation surfaces are arranged as a pair with respect to one another in such a manner that the contact lines (k) can roll onto one another, and vertical to the plane of the contact circles, are intersected at an intersection point (S) by axes (m) passing through their center (M). Ruled surfaces (3,4), formed from a large number of straight paths of contact (s), are partially formed on the contact lines (k), wherein the paths of contact lie on momentary connecting lines (s) of contact points (K), momentarily appearing during the rolling movement, with the momentary intersection points (S), which are produced by a swivel movement of the contact lines (k) with an angular velocity (.OMEGA.) around a common tangent (t) of the contact lines (k) through the momentary contact points (K).

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First Claim