106 results about "Tibial tray" patented technology

A knee implant system includes a femoral adapter. The femoral adapter has a threaded bore so that a stem extension can be threaded onto the proximal end of the adapter. The same stem extension can be threaded onto the distal end of the tibial tray so that the number of stem extensions required in the system is reduced. The femoral adapter has a tapered exterior surface so that a metaphyseal sleeve can be frictionally connected to the femoral adapter. The metaphyseal sleeve has a threaded bore so that the same type of stem extension can be threaded onto the metaphyseal sleeve. The system can include a group of adapters to give the surgeon the option of selecting the appropriate valgus angle and anterior-posterior position of the stem extension.

An orthopedic implant with a diffusion-hardened surface on non-load bearing areas of the implant for interaction with non-load bearing surfaces of a polymeric bio-compatible material, such as UHMWPE (ultra-high molecular weight polyethylene). The orthopedic implant is a mobile-bearing knee prosthetic and system where a coating of oxidized zirconium is formed on the post of the tibial tray of the prosthetic for interaction with an opening of a polymeric tibial insert. The diffusion-hardened surface of the orthopedic implant provides a strengthened post and reduction in wear in the opening of the polymeric insert.

A knee joint prosthesis is disclosed. The prosthesis has a femoral component and a tibial component. The tibial component has a tibial plateau element fitted in a tibial tray element. A hemi capstan shaped bridge member is provided between replicated condyles on the femoral component. A specially shaped post is provided between kidney shaped meniscal depression on the tibial plateau element. The bridge member and the post act together to form an additional joint for load transfer during deep flexion of the prosthesis in its operative configuration.

An artificial knee joint that compresses both osseous impingement and soft tissue impingement from occurring and can endure usage over a long period of time is provided.

The artificial knee joint of the present invention comprises a femoral component, a tibial tray and an insert plate fixed onto the top surface of the tibial tray. The femoral component comprises a femoral articular surface and a cam that is provided on the rear end of the femoral articular surface and protrudes from the femoral articular surface, the insert plate comprises a tibial articular surface that makes contact with the femoral articular surface and a cam-receiving slide surface that makes contact with the cam. When the knee is extended, the joint takes a first sliding state in which the femoral articular surface slides against the tibial articular surface. When the knee is bent at an angle in a range from 90 to 160 degrees, the joint shifts from the first sliding state to a second sliding state in which the cam slides on the cam-receiving slide surface. When the knee is bent deeply with a bending angle of 180 degrees, the second sliding state is assumed in which a resection surface of the femoral component and the rear end of the insert plate are offset.

An orthopedic knee component for implanting within a single compartment of a human knee includes, in a first embodiment a tibial tray having a superior surface having a plurality of tabs disposed along an exterior edge thereof, a bearing component having a superior surface adapted to articularly engage a femoral knee prosthesis and a circumferential groove disposed therearound with which the tabs of the tibial tray cooperatively engage such that the bearing component is movable relative to the tibial tray. In a second embodiment, an orthopedic knee component for implanting within a single compartment of a human knee includes: a tibial tray in supporting engagement with a bearing component, wherein the bearing component includes a superior surface adapted to articularly engage a femoral knee prosthesis and a pair of slots disposed along the superior surface of the bearing component, the femoral component having a pair of rails extending from the articulating surface thereof such that the rails can slidingly engage the slots, and such that the bearing component is movable relative to the tibial tray.

A knee joint prosthesis is disclosed. The prosthesis has a femoral component and a tibial component. The tibial component has a tibial plateau element fitted in a tibial tray element. A hemi capstan shaped bridge member is provided between replicated condyles on the femoral component. A specially shaped post is provided between kidney shaped meniscal depression on the tibial plateau element. The bridge member and the post act together to form an additional joint for load transfer during deep flexion of the prosthesis in its operative configuration.

A punch assembly for preparing a tibia bone for a prosthesis includes a static component configured to be supported by the tibia bone and a dynamic component that includes a punch having a stem. The dynamic component is supported for movement relative to the static component along a generally arcuate path to prepare an aperture having an arcuate contour in the tibia bone. A method of preparing a tibial aperture for is also disclosed.

A unicondylar knee implant system according to one embodiment includes a unicondylar femoral knee component having a single sagittal radius, a tibial bearing component, and a tibial tray component having a self-locking keel. The unicondylar knee implant system also provides for a locking mechanism for securing the tibial bearing component onto the tibial tray component. The unicondylar knee system allows for a simplified surgical technique, complete interchangeability between sizes, and a more MIS compatible implant system.

Provided is a novel modular tibial prosthesis that includes an articulation component formed by direct pressure molding of a resin composition into a tibial tray component to provide a factory formed resin-metal composite structure a tibial tray module. The tibial tray component being capable of releasable attachment to an underlying keel element. A method of manufacture of the tibial prosthesis is also disclosed.

A joint prosthesis having in part a tray that is supported by metaphyseal bone, such as the tibial component of a knee prosthesis. The tibial tray and tibial bearing portions can be de-coupled, resulting in two or more distinct pieces

A porous total knee prosthesis comprises a femoral ankle prothesis, an artificial meniscus and a tibial tray prothesis, wherein a connection hole is formed in a solid main body part of the femoral ankle prothesis; a first porous fixing layer which can play a fixing role together with the femoral bone is arranged on the surface, combined with the femur of a patient, of the solid main body part in a covering manner; a structure wrapping the femoral end subjected to osteotomy is formed on the surface, opposite to the femur of the patient, of the first porous fixing layer, and two femoral articular surfaces are symmetrically arranged on the surface, back to the femur, of the first porous fixing layer; the artificial meniscus is provided with a protrusion matched with the connection hole and used for preventing the femoral ankle prothesis from dislocation, tibial articular surfaces matched with the femoral articular surfaces and a connection part matched with the tibial tray prothesis; and a locating part matched with the connection part is arranged at the upper end of the tibial tray prothesis, a second porous fixing layer is arranged on the outer surface of a supporting part at the lower end of the tibial tray prothesis in a covering manner, and a third porous fixing layer is arranged on the surface of a tibial bonding surface. The porous total knee prosthesis has a strong binding force with the femoral bone of the patient, facilitates growing-in of bone tissues and can achieve a relatively good biological fixation effect.

A bicondylar knee resurfacing prosthesis for limited knee resurfacing procedure inserted through a direct mini lateral approach, which avoid disruption of the extensor mechanism or damage to the quadriceps tendon. The inventive device includes a reduced femoral component, a metallic tibial tray and a polyethylene tibial insert.

A metallic reduced femoral component having a thin polished convex articular surface in a form of two condyles, medial and lateral, connected with an intercondylar bridge. The concave surface having a metallic dovetail transverse ridge across the entire width of the femoral component precisely positioned at the level of maximum weight bearing contact in full extension. The concave surface provides fine asperities and voids to allow bone ingrowth or can be cemented using conventional methyl methacrylate bone cement.

The tibial tray provides a dovetail recess along the superior surface and transversely across its entire width, which will slidingly receive the polyethylene tibial insert. The bottom surface of the metallic tibial tray in contact with the tibial plateau has a dovetail ridge, which extends transversely along the entire width of the tibial component securing the tibial component to the resected tibial plateau.

The tibial insert is made of polyethylene and has the same shape and size of the tibial metallic tray. It provides a dovetail that matches the one on the tibial tray so it can be easily driven in and locked in place. The surface of the tray provides two shallow condylar grooves that conformably match the condylar convex surfaces of the metallic femoral component.

The invention discloses total-knee-joint replacement prosthesis which comprises a femoral condyle, a tibia support, a tibia pad and a patella. The femoral condyle comprises an internal condyle, an external condyle, a joint surface, an intercondylar box and a condyle inside joint internal surface. The tibia pad is provided with a limiting stand column and glenoid cavities. The glenoid cavities define the shape of a glenoid cavity face. The shape of the glenoid cavity face is matched with the articular surface of the femoral condyle. The lower end face of the tibia pad is provided with a first groove and a second groove. The tibia support comprises a supporting disk with a fixing component. The upper surface of the supporting disk is provided with a first supporting pillar and a second supporting pillar which are matched with the tibia pad in a locked mode. The patella comprises a patella articular surface and a patella fixing stand column. The total-knee-joint replacement prosthesis has very good initial stability and long-term use stability, biocompatibility is improved, metabolism of bones is facilitated, resistance to subsidence of the tibia support, resistance to revolving resistance and long-term use stability are improved, the binding force of the tibia support and the tibia pad is further improved, and the service life of the knee joint is further prolonged.