Prosthetic knee joint devices

Claim 1

A prosthetic knee joint device comprising: a meniscal component; and a tibial component; said meniscal and tibial components each being of a bicompartmental form having a pair of mutually spaced end portions defining respective condylar articulation surfaces, with the end portions of each pair being interconnected by a respective intercondylar portion; said meniscal component end portions each having a concavely dished condylar articulation surface and a relatively flat condylar articulation surface in mutual back-to-back disposition; said tibial component condylar articulation surfaces being of complementary shape to and in respective mutual sliding engagement with the relatively flat condylar articulation surfaces of said meniscal component for relative rotation and translation movements therebetween; and one of the respective intercondylar portions of said meniscal and tibial components having a projection and the other having a recess said projection and recess being interconnected to hold said mutual sliding engagement against dislocation and to limit both said relative rotation and translation movements between said components.