SEMI-CONSTRAINED ARTIFICIAL JOINT

摘要

An artificial joint having stepped convex and concave bearing surfaces is provided. The stepped configuration prevents the bearing surfaces from sliding past one another along their axis of rotation and thus stabilizes the joint against lateral dislocations. In certain preferred embodiments, the stepped bearing surfaces are employed in an artificial knee join and the joint it further stabilized against dislocations corresponding to the femur moving anteriorly with respect to the tibia.