An implant apparatus for use in uniting a pair of bone segments, the apparatus including a first stem configured to be implanted in an intramedullary cavity of a first bone segment; a second stem configured to be implanted in an intramedullary cavity of a second bone segment; and a connector for connecting the first stem to the second stem, the connector including a first connector segment and a second connector segment, wherein the first connector segment and the second connector segment are coupled together at a lap joint connection.

A method of evaluating a human knee joint, includes: cutting away a proximal portion of the tibia; inserting the gap tensioner between the tibia and the femur; extending the gap tensioner urging the tibia and the femur apart and applying tension to the medial and lateral collateral ligaments; associating at least two tracking markers with the knee joint; providing an electronic receiving device operable to determine a position and orientation of each of the tracking markers relative to the electronic receiving device; moving the knee joint through at least a portion of its range of motion; while moving the knee joint, using the electronic receiving device to collect position data from the tracking markers; processing the collected position data to produce a geometric model of at least a portion of the knee joint; and computing one or more tool paths passing through the knee joint.

A prosthetic total knee replacement system comprises a distal femoral implant component, a tibial tray implant component and a fixed bearing tibial tray insert. The fixed bearing tibial tray insert is fixed to the tibial tray and articulates with the distal femoral implant component. The fixed bearing tibial tray insert component has a medial-lateral centerline and a stabilizing post. The stabilizing post has a medial-lateral centerline offset laterally from the medial-lateral centerline of the fixed bearing tibial tray insert.

An artificial ligament is provided having an elongate body and two ends, with a loop being provided at least one of the ends and a loop liner being provided within the loop. A kit of artificial ligaments is also provided with each ligament in the kit having a different fixed length. Also provided are methods for determining a length of artificial ligament to be used within a prosthetic knee joint, selecting a ligament from a range or kit of ligaments, and implanting a prosthetic knee joint assembly comprising an artificial ligament.

A link (1) for connecting two loops of a flexible tension-carrying construct (2, 2a). It solves the problem of providing effective means to connect two anchor points (7, 7a), typically on bones articulating at a joint by the flexible tension-carrying construct.

A knee joint prosthesis is configured to move between an extended position and a flexion position. The knee joint prosthesis includes a femoral component configured to be mounted to a femur, and a tibial component configured to be mounted to a tibia. The tibial component is configured to engage the femoral component to form the knee joint prosthesis. A post is fixedly connected to one of the femoral component and the tibial component and has a helical surface at a terminal end thereof. A recess is defined on the other of the femoral component and the tibial component and has a helical surface. The helical surfaces of the post and recess are configured to engage in order to cause relative rotation between the femoral and tibial components as the knee joint prosthesis moves between the extended and flexion positions.

A knee joint prosthesis is capable of moving between an extended position and a flexion position. The knee joint prosthesis includes a femoral component that is configured to be mounted to a femur, and a tibial component that is configured to be mounted to a tibia. The femoral component and the tibial component are at least partially connected together by a geared arrangement.

A knee joint prosthesis is configured to move between an extended position and a flexion position. The knee joint prosthesis includes a femoral component configured to be mounted to a femur; and a tibial component configured to be mounted to a tibia, the tibial component configured to engage the femoral component to form the knee joint prosthesis. A projection extends from one of the femoral component and the tibial component, and a track is disposed in the other of the femoral component and the tibial component. The projection is positioned within the track to guide relative motion between the femoral component and the tibial component.

A knee joint prosthesis is configured to move between an extended position and a flexion position. The knee joint prosthesis includes a femoral component configured to be mounted to a femur, and a tibial component configured to be mounted to a tibia. The tibial component is configured to engage the femoral component to form the knee joint prosthesis. A post is fixedly connected to one of the femoral component and the tibial component, and a cam recess is defined on the other of the femoral component and the tibial component. The cam recess is configured to engage the post in either the extended position or the flexion position of the knee joint prosthesis. An artificial ligament is fixedly connected to the femoral component and the tibial component to simulate either an anterior cruciate ligament or a posterior cruciate ligament.

A method for imparting tension across a human knee joint which includes a femur bone, a tibia bone, a patella bone, a patellar tendon, and ligaments, wherein the ligaments and patellar tendon are under anatomical tension to connect the femur and tibia together, creating a load-bearing articulating joint. The method includes: providing a tensioning device, including: a baseplate; a top plate; and a linkage interconnecting the baseplate and the top plate and operable to move the tensioning device between retracted and extended positions, wherein the top plate is pivotally connected to the linkage so as to be able to freely pivot about a pivot axis; positioning the tensioning device between the femur and the tibia; applying an actuating force to the linkage to move the tensioning device towards the extended position, so as to impart a controlled separating force driving the femur and tibia apart to extend the ligaments.