Abstract: The present invention relates to an implantable knee joint prosthesis which is designed to replace the engaging surfaces of the femur and tibia of a dysfunctional human knee joint. In its most general form, the invention comprises an implantable knee joint prosthesis having a tibial stem portion, a tibial tray portion, an interchangeable modular articulating surface member which is removably attached to the tibial tray portion, and a femoral portion adapted to cooperatively bear upon the articulating surface. The invention also features a dual locking mechanism which attaches the articulating surface to the tibial tray portion by means of a locking lip and flange arrangement together with a locking screw which fits into the tibial stem portion.

Abstract: A device for enabling substantially-anatomic reduction of a posteriorly uable pelvic disruption, as of a fracture or dislocation of the posterior pelvis. The device is adapted to enable secure fixation thereof to the posterior pelvic disruption. It is further adapted to enable fine adjustment of the alignment and fit of the disrupted surfaces, operable from a position externally of the patient's body, and to retain the united positions of the disrupted surfaces, for substantially-anatomically reducing the posteriorly unstable pelvic disruption. The device includes a plurality of tapper threaded pins, each adapted to be tapped into the outer cortices of the posterior pelvic bone at a location proximate the site of the posterior pelvic disruption. The device further includes a frame, adapted to enable the tapper threaded pins to be connected thereto for interconnection thereof, and mechanisms adapted to enable externally operable fine adjustment of the frame in a plurality of planes.