Patent ID: 7998205

Claim:
Artificial unicondylar meniscus part for a unicondylar knee-joint prosthesis, comprising: a single femoral joint surface on an upper side of the meniscus part sized for the movable mounting of only a single artificial, natural or machined condyle of a femur, and a depression formed in the femoral joint surface, said depression facing away from the meniscus part and having an anterior end region, a posterior end region and a width, said width having a minimum between the anterior end region and the posterior end region such that the depression in plan view defines a boundary line with the upper side that corresponds substantially to an external contour of a figure eight, wherein the figure eight contour of the depression minimizes wear of the meniscus part by providing a large surface for contact with the condyle, and by reducing transverse forces acting upon the meniscus part during femoral movements that do not extend in an anterior-posterior direction relative to the meniscus part.