posterior stabilized

A posterior stabilized knee implant replaces the PCL with a cam and post design of the knee replacement that ensures femoral rollback. The advocates of the PS knee design claim more predictable knee ligament balancing and more predictable flexion. The opposition of PS knee designs claim the cam and post design causes additional polyethylene wear, the patella may “clunk” because of the design, and that some additional femoral bone may be lost during a knee revision of a PS design. (Dr. Kurtz, Nashville)