The disclosure provides an articular gasket prosthesis and an articular prosthesis with the articular gasket prosthesis. The articular gasket prosthesis includes an elastic gasket disposed between a first skeleton and second skeleton forming a joint, the elastic gasket including: an elastic matrix, having a first contact surface facing the first skeleton and a second contact surface facing the second skeleton; and multiple synovial fluid passages, distributed in the elastic matrix and communicating the first contact surface and the second contact surface, the multiple synovial fluid passages being disposed according to a predetermined manner to gradually increase hardness of the elastic matrix from a center to an edge and gradually decrease elasticity of the elastic matrix from the center to the edge.

The exemplary embodiments of the present disclosure are described and illustrated below to encompass methods and devices for designing patient specific prosthetic cutting jigs and, more specifically, to devices and methods for segmenting bone of the knee and the resulting cutting guides themselves. Moreover, the present disclosure relates to systems and methods for manufacturing customized surgical devices, more specifically, the present disclosure relates to automated systems and methods of arthroplasty cutting guides, systems and methods for image segmentation in generating computer models of knee joint.

The disclosure provides a meniscus substitute and a knee joint prosthesis with the meniscus substitute. The meniscus substitute includes; a base body, disposed on a tibial plateau or a tibial plateau prosthesis of a tibia; a polymer joint body, disposed on the base body; and a bone screw, disposed in the tibia in a penetration manner and connected with the base body.

A unicondylar posterior cutting block, method of use and kit of surgical components are provided, with the cutting block comprising: a base which is mountable on a resected proximal tibial surface of a knee of a patient in use; and a body pivotally attached to the base, the body including an alignment formation arranged to align with a marking on a femur in use, the body defining a cutting guide therein for receiving a cutting instrument to make a unicondylar posterior cut in the femur and wherein moving the alignment formation to align with the marking on the femur causes the body to rotate relative to the base and to tilt the cutting guide relative to the base. Different bases offer different cut positions and rotation of the base offers further different cut positions.

A meniscus replacement device for replacing damaged soft tissue at a host knee includes a first component comprising a first tissue-interface surface shaped to free-floatingly interface with tissue structure of one of a femur and a tibia in a knee joint having a damaged soft tissue, and comprises a second component comprising a second tissue-interface surface shaped to free-floatingly interface with a second tissue structure of the other of the femur and the tibia in the knee joint. The second component may include a containment cavity receiving at least a portion of the first component. In another form, the free floating soft joint tissue replacement component and the base component are fixed together. In some aspects, the second tissue-interface surface is shaped to fit contours of a natural tibia plateau. In some aspects, the first tissue-interface surface is shaped to fit contours of a femoral surface.

A method and system for femoral condylar resection arthroplasty (FCRA) of the knee, which preserves the undamaged meniscus, whether by arthroscopy or arthrotomy, and only replaces the damaged area of the femoral condyle. In one embodiment, both the distal and posterior femoral condyle are replaced with a two piece femoral two-piece distal and posterior femoral condyle component. This two piece component has a metal piece and a plastic piece removably attached in a tongue and groove arrangement. This arrangement allows the plastic piece to be removed when converting the FCRA into a unicompartmental arthroplasty.

A surgical implant includes a tray extending from a first end to a second end along a first plane, the tray including an upper surface and a lower surface, a first post coupled to and extending from the tray away from the first plane and configured to be inserted into a bone portion, the first post including a first opening extending through the first post, a second post coupled to and extending from the tray away from the first plane and configured to be implanted into the bone portion, the second post including a second opening extending through the second post, and a fastener removably coupled to the first post and the second post, the fastener extending from a first fastener end to a second fastener end through the first opening and the second opening.

Methods and devices for correcting wear pattern defects in joints. The methods and devices described herein allow for the restoration of correcting abnormal biomechanical loading conditions in a joint brought on by wear pattern defects, and also can, in embodiments, permit correction of proper kinematic movement.

A kit of parts for use in a unicondylar knee replacement procedure having a keel punch, a unicondylar tibial trial and an impactor. The keel punch including a cutting formation on the inferior side configured to form a slot in a resected part of a patient's tibia, and a first attachment formation on the superior side. The unicondylar tibial trial having a body defining a slot passing therethrough between an upper surface and a lower surface that extends parallel to a longitudinal axis extending from an anterior end to a posterior end of the body. The slot configured to slidably receive the keel punch. The impactor includes a second attachment formation and is releasably attachable to the keel punch by slidingly engaging the second attachment formation with the first attachment formation. An assembly for use in and methods of trialing during a unicondylar knee replacement procedure are also disclosed.

A unicompartmental orthopedic knee implant may include a tibial tray including a body having a joint-facing side, a bone-facing side opposite the joint-facing side, a side wall extending about a periphery of the body, and a channel extending through the bone-facing side from one of the joint-facing side or the side wall, the channel being angled relative to the bone-facing side of the body. The implant may also include a fixation element coupled to the body. The fixation element may include a rail for insertion into the channel of the body, a support extending from the rail, and a bone engagement feature connected to the support, the bone engagement feature including an edge operable to penetrate the tibia, wherein the bone engagement feature is inserted through the channel.