26 results about "Knee implant" patented technology

An orthopaedic knee implant includes a femoral component having a substrate and a coating disposed on the surface of the substrate. A method for making a femoral component of an orthopaedic knee implant is also disclosed.

A prosthetic femoral component includes an articular component and a bone contacting component. The articular component has a convex articular surface and a concave curved inner surface opposite the convex articular surface. The bone contacting component is least partially insertable within the articular component and has an outer side and an inner side opposite the outer side, the outer side having a convex curved surface received on and complementary to the concave curved inner surface of the articular component, and the inner side being defined by a plurality of adjacent planar segments.

Exemplary assemblies, apparatuses, systems, methods, and kits are provided herein related to modular tibial inserts. One such assembly can comprise a modular tibial insert assembly having: a modular medial insert component, the modular medial insert component having a medial component proximal side proximally disposed from a medial component distal base side, wherein a medial component body extends between the medial component proximal side and the medial component distal base side; a modular lateral insert component, the modular lateral insert component having a lateral component proximal side proximally disposed from a lateral component distal base side, wherein a lateral component body extends between the lateral component proximal side and the lateral component distal base side; wherein the modular tibial insert assembly has an assembled configuration and a disassembled configuration, and wherein the modular medial insert component is configured to fixedly engage the modular lateral insert component in the assembled configuration.

A prosthetic femoral component includes an articular component and a bone contacting component. The articular component has a convex articular surface and a concave curved inner surface opposite the convex articular surface. The bone contacting component is least partially insertable within the articular component and has an outer side and an inner side opposite the outer side, the outer side having a convex curved surface received on and complementary to the concave curved inner surface of the articular component, and the inner side being defined by a plurality of adjacent planar segments.

A reference jig comprises a base adapted to be secured to a distal end of a bone. An adjustment mechanism has a bracket, one or more rotational joints operatively mounting the bracket to the base, whereby the bracket is rotatable in two or more rotational degrees of freedom relative to the base, and one or more translational joints. A landmark alignment unit is operatively connectable to the bracket by the at least one translational joint, the landmark alignment unit having a bone alignment component configured to be aligned with at least one bone landmark.

The present invention relates to a perforated knee joint, a hole forming method and a forming die. In order to ensure the tight combination of the knee joint implant and the original bone tissue, the present invention adds a threaded hole design to the posterior condylar surface of the knee joint, replacing the conventional rectangular counterbore design. Since the shape of the knee joint metal part is complex and the threaded hole is arranged on the inner wall of the posterior condylar surface, it is easily interfered by the larger anterior condylar surface during machining, which increases the difficulty of processing and manufacturing. The present invention adopts the investment casting method to produce the knee joint metal part.

A knee implant provides enhanced joint stability and controlled movement. The implant comprises a femoral component, a tibial component, and a braking mechanism operative therebetween. The braking mechanism includes a barrel, a shaft, and clutch plates alternately keying the barrel and shaft in a non-rotatable manner. A plunger, displaced under compression force between the components, compresses the clutch plates to create frictional engagement, restricting or locking relative movement under weight-bearing conditions. This allows stability during standing and controlled mobility when compression is reduced. Optionally, a magnetic biasing mechanism applies variable torque between the components, adapting joint behaviour to different loading conditions. The combined braking and biasing mechanisms provide reliable support and improved control for patients requiring joint stability during functional activities.

To provide a partial knee implant and a method for installing the same.SOLUTION: The present disclosure is a femoral preparation guide and a kit of surgical components related to the femoral preparation guide. The femoral preparation guide is for use on a condyle of a femur during a surgical procedure in which the condyle receives a femoral condyle implant. The femoral preparation guide includes a posterior portion for fitting over a posterior region of the condyle and a distal portion for fitting over a distal region of the condyle. The distal portion is angled relative to the posterior portion. The distal portion includes first and second resection slots for receiving cutting tools that provide two resections of the condyle. The first and second cutting slots are angled relative to each other.SELECTED DRAWING: Figure 1C

Disclosed herein are systems and methods for planning a knee arthroplasty procedure. A method may include registration of patient anatomy, including specific registration of the patella; anatomy modelling based on the registration; automated generation of anatomical landmarks; morphological characterization; risk classification; and a planning optimization process based on the morphological characterization and the risk classification. The risk classification may include a determination of potential patellar complications based on patient characteristics, such as patient demographic information and / or patient anatomical information compared with historical information of patient outcomes. The planning optimization process may determine knee implant components and / or the configuration thereof within the patient based on the patient risk classification.

An implant includes a liner (130) and a tibial component (150). The liner includes a top portion (131) and a bottom portion (133). The top portion includes a bearing surface (131a). The bottom portion includes at least one of: a first dovetail structure and a chamfer cut. The tibial component includes a base plate (151). The base plate includes a wall (151a) and a cavity (151b). The cavity is configured to receive the bottom portion of the liner. An inner side (151a1) of the wall includes at least one of: a second dovetail structure and one or more fins (151a2). The second dovetail structure is configured to mate with the first dovetail structure of the liner, forming a dovetail joint. The one or more fins are configured to form an interference lock with the chamfer cut of the liner.

Implants, devices, instruments, systems and methods for replacing an articulation surface in a joint, for example, unicompartmental knee implants. A femoral resection assembly including a femoral cut guide and a spacer coupled to an inferior surface of the femoral cut guide. A fin punch for receipt within the femoral cut guide. A tibial resection guide and keel cutter for preparing a patient's tibia for insertion of a tibial implant. A tibial insertion system including a handle, an impaction inserter coupled to an inferior end of the handle, a tibial implant coupled to an inferior end of the impaction inserter, and an implant packaging assembly that receives the impaction inserter and tibial implant. Methods for implanting the unicompartmental knee implants are also disclosed.

Disclosed herein are a surgical system for patella tracking and a method for selecting and aligning knee implants utilizing the same. The surgical system may include first and second trackers and a patellar tracking system. The first tracker may be configured to contact an unresected patella, and the second tracker may be configured to contact a bone. The patellar tracking system may be configured to track the first and second trackers during patellar flexion and extension to generate patellar range of motion and patellar trial range of motion. A method for selecting a knee implant may utilize the first and second trackers and the patellar tracking system.

Exemplary assemblies, apparatuses, systems, methods, and kits are provided herein related to modular tibial inserts. One such assembly can comprise a modular tibial insert assembly (10) having: a modular medial insert component (20), the modular medial insert component having a medial component proximal side (28) proximally disposed from a medial component distal base side (23), wherein a medial component body (25) extends between the medial component proximal side and the medial component distal base side; a modular lateral insert component (30), the modular lateral insert component having a lateral component proximal side (38) proximally disposed from a lateral component distal base side (13), wherein a lateral component body (15) extends between the lateral component proximal side and the lateral component distal base side; wherein the modular tibial insert assembly has an assembled configuration and a disassembled configuration, and wherein the modular medial insert component is configured to fixedly engage the modular lateral insert component in the assembled configuration.

The invention provides an orthopedic implant test auxiliary device, and belongs to the technical field of test equipment. Comprising a test box body, a control module is fixedly mounted on one side of the surface of the test box body, a mounting partition plate is fixedly mounted on the inner wall of the test box body, a liquid storage box is fixedly mounted on one side of the top of the inner wall of the test box body, and test equipment and a rotating assembly are mounted at the top end of the inner wall of the test box body; the rotating assembly is fixedly mounted at the top of the mounting partition plate, and the rotating assembly is used for rotating to change the rotating state of the knee joint implant. By simulating the body fluid condition in the knee joint of the human body, it is guaranteed that the knee joint implant can be close to the real use environment of the knee joint as much as possible during testing, secondary testing of the knee joint implant is achieved, the flexibility of the knee joint implant during testing is further improved, and the testing efficiency is improved. And the test efficiency of the knee joint implant is improved.

The present invention relates to an animal knee joint implant that reflects the animal's anatomical structure. More specifically, it relates to an implant that can be used for complex diseases that are more complex than general knee joint diseases (rheumatoid arthritis, degenerative arthritis) and often accompanied by symptoms such as bone loss, damage to surrounding muscles and ligaments, etc., and enhances the stability of varus and valgus as well as the stability of flexion and extension, thereby being able to easily compensate for the gap that may occur when cutting the joint bone, and is an animal knee joint implant that reflects the animal's anatomical structure.

Disclosed herein are a surgical system for patella tracking and a method for selecting and aligning knee implants utilizing the same. The surgical system may include first and second trackers and a patellar tracking system. The first tracker may be configured to contact an unresected patella, and the second tracker may be configured to contact a bone. The patellar tracking system may be configured to track the first and second trackers during patellar flexion and extension to generate patellar range of motion and patellar trial range of motion. A method for selecting a knee implant may utilize the first and second trackers and the patellar tracking system.

Methods and systems for performing a knee replacement procedure include analyzing images of a patient's patellofemoral and femoro-tibial joints in multiple flexion positions to identify preoperative knee joint geometry. A statistical patient model predicts prosthetic knee implant performance based on preoperative knee joint geometry and given prosthetic knee implant implantation parameters to calculate an optimized surgical plan for performing the procedure using a computer-assisted surgery system that can use fiducial markers fixed to patient tissue. The model can include optional patient motion for adjusting motion profiles for plan optimization.

An orthopaedic knee implant includes a femoral component having a substrate and a coating disposed on the surface of the substrate. A method for making a femoral component of an orthopaedic knee implant is also disclosed.

The invention relates to functionally graded polymeric knee implants for enhanced fixation, wear resistance and mechanical properties and manufacture thereof. The present invention includes polymer-based femoral and / or tibial component implants for total knee replacement / replacement procedures for providing improved wear resistance, enhanced physiological response at the bone / implant interface, and reduced stress shielding. The implant may be made via additive manufacturing. The articular surface of the implant may be implemented in the absence of any additive or in a form containing an additive for improving the tribological response. Furthermore, the instruments disclosed herein contain an interface surface (i.e., a bone / implant interface) in contact with natural bone, which may be present in its pure form, containing a bioactive additive. The implant has a porous topography on the bone / implant interface to improve biological response and improve fixation. Wherein the depth and topography of the additive is controlled via the techniques disclosed herein.

This artificial knee joint implant comprises a tibial tray, a tibial component, a fixing member, and an insert. The insert has a plate-shaped first portion and a second portion, a through-hole that penetrates the first portion and the second portion and in which the fixing member is positioned, and a support portion positioned around the through-hole and supporting a portion of the fixing member. A side surface of the first portion includes a second surface having a longitudinal length greater than the diameter of the through-hole. The tibial tray has a fitting portion that fits with the fixing member.

The present invention provides a laser-selectively prepared, shape-controlled hydrogel knee implant prosthesis, comprising a hydrogel knee implant prosthesis body, the outer contour, thickness, and surface curvature of which are obtained by removing a universal hydrogel block by ultraviolet laser etching; the upper surface of the prosthesis body is provided with microgrooves and microprotrusions formed by laser etching; the lower surface is provided with a micropit structure on the order of 10 microns, the micropit structure comprising a plurality of periodically arranged circular micropits or polygonal micropits; the surfaces formed by laser etching of the microgrooves, microprotrusions, and micropits on the upper surface and the micropits on the lower surface have different porosities. The present invention utilizes short-wavelength laser etching to form different microstructures on the surface of the hydrogel, achieving different adhesion friction properties on different surfaces and regulating the friction coefficient of different areas on the same surface; at the same time, it has the characteristics of anti-fouling, promoting cell attachment, and increasing service life, greatly improving the tribological properties of cartilage and its adaptability to use in complex environments.

A system of prosthetic implants for a total knee replacement procedure is provided. The system includes a tibial component of a knee joint implant, a tibial insert configured to be positioned against the superior side of the platform of the tibial component, a first femoral component of a knee joint implant, and a second femoral component of a knee joint implant.

Various embodiments relate to a femoral component for a knee prosthesis optimized for kinematic alignment surgical technique. The component includes an anterior flange having a length of about 40 mm to about 60 mm measured from a distal femoral reference point to an apex of the flange; a lateral flange defining a lateral flange angle of about 8 degrees to about 11 degrees, the angle measured between a line extending along the lateral flange and a line perpendicular to a reference line that connects the farthest distal points of the medial condyle and the lateral condyle; and a trochlear groove formed in the anterior flange. The trochlear groove has a width that remains substantially constant from about 0 degrees of flexion to about 30 degrees of flexion, with a tapering angle of about 1 degree to about 12 degrees.

A polymeric based femoral and / or tibial component implant can be be used in total knee replacement / arthroplasty procedures serving to provide increased wear resistance, enhanced physiological response at the bone / implant interface, and decreased stress-shielding. The implant can be made via additive manufacturing. The articulating surface of the implant may be implemented in without any additive or in a form containing an additive for improved tribological response. Further, the a device contains an interfacial surface which is in contact with the native bone (i.e., bone / implant interface) which may exist in its pure form, containing a bioactive additive. The implant has a porous morphology on the bone / implant interface for improved biological response and improved fixation. The depth of the additives and the topographical morphology therein are controlled via techniques disclosed herein.