70 results about "Knee prosthesis" patented technology

An insert for use in a knee prosthesis is disclosed. In one embodiment, the insert includes a medial compartment and a lateral compartment. The medial compartment includes a top surface having a concave surface or curve with a more posterior sulcus and increased anterior lip. The lateral compartment includes a top surface having at least a segment or portion with a convex surface or curve. Thus arranged, the insert is arranged and configured to provide improved stability for varying grades of PCL deficiencies compared to existing inserts that have a mid-line sulcus and lateral convexity. In addition, the insert provides improved lateral posterior translation compared to existing designs with a concave or flat lateral articulation that lack a lateral posterior convexity.

Disclosed are prosthetic systems comprising a powered knee prosthesis and a volitional controller configured to provide control of the prosthesis to the user. The prosthetic system may be configured to enable a user to walk on smooth and / or uneven terrain and to ascend and / or descend stairs. The volitional controller may be configured in a contact state when the prosthesis is in contact with a ground surface and a no contact state when the prosthesis is lifted from the ground surface. When in the contact state, the controller may output a knee torque signal for controlling the powered knee of the prosthesis. The knee torque signal may be based on a target knee torque determined by the knee orientation and the torque measured at the ankle of a prosthetic foot. When in the no contact state, the controller may output a knee torque signal based on a desired knee position.

Disclosed are prosthetic systems comprising a powered knee upper leg prosthesis and a volitional controller configured to provide control of the prosthesis to the user. The prosthetic system may be configured to enable a user to climb a set of stairs. The prosthetic system may be activated by the activation of an EMG signal source, such as the biceps femoris muscle of the upper leg. The volitional controller of the prosthetic system may be further configured to receive a ground state signal and / or an IMU signal to determine a target knee torque for operating the powered knee of the prosthesis.

The invention relates to a hinge type knee joint prosthesis which comprises a thighbone component (101), and the thighbone component comprises two condyles (101c and 101c ') and a hinge box (237). A tibial component (108); and a connecting member (150) connected to the tibial member (108) and the femoral member (101). The connecting component (150) comprises a box cover (102) connected with the thighbone component (101); the t-shaped joint (103) is connected with the box cover (102); the pivot pin (104) is connected with the t-shaped joint (103) and the box cover (102); the axial bushing (105) is connected with the pivot pin (104) and the t-shaped joint (103); and the axial locking screw (106) is used for fixedly connecting the axial bushing (105), the pivot pin (104) and the t-shaped joint (103) with one another. The box cover (102) comprises a connecting piece (201). The connecting piece (201) is used for avoiding contact between the femoral component (101) and the t-shaped connector (103).

A combination of a first assembly for guiding resection of a femur and tibia of a knee joint and a second assembly including femoral and tibial knee components. The combination of the first assembly and the second assembly provides optimal placement and positioning of the femoral and tibial knee components to achieve near-normal knee kinematics and tension. The preparation for and placement of the prosthetic knee components provides medial-pivoting kinematics mimicking that of the natural knee thereby promoting improved outcome for the patient.

The application discloses a tibial prosthesis and a knee joint prosthesis with the same. The tibial prosthesis comprises a patellar ligament attachment surface, a lateral collateral ligament attachment surface and a medial collateral ligament attachment surface, and the surface roughness of at least one of the patellar ligament attachment surface, the lateral collateral ligament attachment surface and the medial collateral ligament attachment surface is less than or equal to a preset value. The tibial prosthesis has the advantages of small friction, low wear, no inflammation and pain, significantly reduced postoperative pain and discomfort, facilitated recovery of the patient, effectively maintained stability and function of the knee joint, long service life and the like.

An orthopaedic prosthesis includes a femoral component (12) comprising a polymeric material. The polymeric material can include a poly(arylene ether) or a poly(oxymethylene). The orthopaedic prosthesis can include a component having an articular layer (58) and a support layer (60) adjacent the articular layer. The support layer can comprise a reinforcing fiber. The orthopaedic prosthesis can be a knee prosthesis.

Periprosthetic bone fixation plates are disclosed including, for example, periprosthetic proximal femur plate, periprosthetic distal femur plate, periprosthetic humerus plate, periprosthetic ring plate, and periprosthetic troch plate. In use, the periprosthetic bone fixation plates are arranged and configured for use in periprosthetic fractures. That is, the periprosthetic plates include one or more features to facilitate positioning and securement of the bone fixation plate to a patients bone that previously received a surgically implanted orthopedic device or implant such as, for example, an intramedullary nail, a hip prosthesis, a knee prosthesis, etc. In use, the one or more features are designed and configured to facilitate avoidance of the previous surgically implanted orthopedic device or implant. In addition, the periprosthetic bone fixation plates are arranged and configured to facilitate plating of a longer working length as compared to existing bone fixation plates (e.g., plating from, for example, femoral condyle to greater trochanter).

The invention provides a cross-scale force line safety boundary determination method and system for knee joint replacement and a readable storage medium, and the method comprises the steps: S1, obtaining the physical property and service data of a knee joint prosthesis, and carrying out the treatment through collecting the individual feature data and multi-modal clinical data of a patient, so as to form an available data set; s2, performing simulation analysis on different alignment angles of the knee joint prosthesis according to the available data set, and simulating mechanical response under various alignment error combinations to determine stress and pressure distribution; s3, acquiring multi-dimensional experimental data of the knee joint prosthesis, and evaluating performance through material fatigue and wear experiments; s4, according to simulation analysis and experimental data, knee joint prosthesis service evaluation based on cross-scale correlation is carried out, the safety force line range is determined, and the service performance is predicted. According to the method, the problems of inaccurate service performance prediction and inconformity with postoperative experience of a patient caused by scale splitting, material dispersity and disjunction of a simulation model and clinical reality are solved.

This invention proposes a tibial liner and a total knee joint prosthesis. The tibial liner includes a medial liner and a lateral liner. The medial liner has a medial articular surface. The cross-sectional line formed by the intersection of the medial articular surface and the sagittal plane includes an anterior lip segment, a functional segment, and a posterior lip segment connected in sequence. The sagittal radius of the anterior lip segment is larger than that of the functional segment, which effectively reduces the height of the anterior side of the medial liner and avoids interference between the femoral prosthesis and the anterior side of the medial liner during posterior tilt assembly of the knee joint prosthesis, thus preventing interference with the normal contact of the articular surface.

This application provides a knee femoral prosthesis. The knee femoral prosthesis includes: an anterior portion configured for fitting onto the distal anterior condylar osteotomy surface of the femur; a posterior portion configured for fitting onto the distal posterior condylar osteotomy surface of the femur; a middle portion configured to connect the anterior and posterior portions; and at least two through-holes configured to receive fasteners to secure the knee femoral prosthesis to the distal femur. The at least two through-holes include through-holes whose bore axes intersect or are opposite to each other. Using the knee femoral prosthesis according to this application, a more targeted prosthesis fixation strategy can be provided based on the patient's individual condition, thereby achieving better initial prosthesis stability. Furthermore, this application also relates to a knee prosthesis system incorporating this prosthesis.

The application relates to a knee joint prosthesis component connecting device, which comprises a biological fixation stem connected between a prosthesis component and a bone, the biological fixation stem comprises a conical body and a biological fusion layer arranged on the peripheral side wall of the conical body, and the biological fusion layer and the conical body jointly form a flat conical structure of the biological fixation stem, and the biological fusion layer comprises an elastic porous layer fixedly attached to the conical body. The knee joint prosthesis component connecting device can effectively ensure the connection reliability of the knee joint prosthesis component and the bone of a patient, and has good biological compatibility.

The invention provides a knee joint prosthesis for swimming and a swimming prosthesis, and relates to the technical field of knee joint prostheses. The knee joint artificial limb for swimming comprises an artificial limb upper body, an artificial limb lower body, an outer side connecting rod and a shifting piston piece. One end of the outer side connecting rod is fixedly arranged on the artificial limb upper body, and the other end is pivoted with the artificial limb lower body; two shifting piston pieces are pivoted on the artificial limb upper body and the artificial limb lower body, one end of each shifting piston piece is pivoted with the artificial limb upper body, and the other end of each shifting piston piece is pivoted with the artificial limb lower body. The swimming prosthesis comprises a knee joint prosthesis for swimming. The technical effect of assisting the disabled in swimming is achieved.

This invention relates to the field of artificial joint prosthesis technology, and discloses an anatomical femoral condyle knee joint prosthesis that does not preserve the cruciate ligament. The prosthesis includes a femoral condyle, a tibial plateau pad, and a tibial plateau support. The femoral condyle comprises a medial condyle and a lateral condyle. The medial and lateral condyles, in lateral view, respectively form medial condyle curve contours and lateral condyle curve contours. The medial condyle curve contour is located lateral to the lateral condyle curve contour, and the movement trajectory length of the medial condyle curve contour is 15%-25% longer than that of the lateral condyle curve contour. The tibial plateau pad has medial condyle curved grooves and lateral condyle curved grooves that respectively conform to the medial and lateral condyles. The slope of the medial condyle curved groove is greater than that of the lateral condyle curved groove. This invention provides an anatomical femoral condyle knee joint prosthesis that does not preserve the cruciate ligament, solving the problem of poor compatibility between existing prostheses and surrounding tissues after implantation.

After the knee prosthesis using this tibial platform is implanted in the human body, a gap appears between the femoral condyle and the tibial pad due to long-term wear. The compressed elastic component begins to push the first push block to move, thereby lifting the first ascending part located on the upper inclined surface of the first push block. The first ascending part drives the tibial pad to rise. The first push block, pushed by the elastic component, pushes the second push block to move inward along the track. The second push block then pushes the support rod of the second ascending part to move, and the lifted second fixing block further drives the tibial pad to rise. After the tibial pad has been lifted, the pawl in the blocking device engages with the serrations on the second push block, thereby limiting the push block and preventing it from retracting, thus preventing the ascending part from descending, and completing the lifting of the tibial pad. This effectively solves the problem in the prior art where the gap between the femoral condyle and the pad is different after wear on the inner and outer sides of the femoral condyle, leading to accelerated wear.

The invention discloses an additive-manufactured biological tibia tray prosthesis and a manufacturing method thereof, and relates to the technical field of artificial knee joint prostheses. The biological type tibia support prosthesis comprises four types: a biological type symmetrical tibia support, a biological type symmetrical stemless tibia support, a biological type anatomical tibia support and a biological type anatomical stemless tibia support. The prosthesis mainly comprises a support body, a porous structure, a plug pin and the like, and is integrally formed through an additive manufacturing technology, so that the precision and the strength are ensured. The porous structure is designed to be in an irregular space three-dimensional grid shape, the thickness ranges from 0.6 mm to 1.6 mm, and the porous structure is used for promoting bone trabecula ingrowth and achieving biological fixation. The positioning nail adopts a bullet-shaped design and is provided with an exhaust groove and a notch, so that the installation is simplified and the stability is enhanced. The manufacturing method comprises the steps of design modeling, stress optimization, additive manufacturing and aftertreatment, and the prosthesis is made of a titanium alloy material and meets related international standards. The invention has the advantages of simple installation, reliable fixation, good bone ingrowth effect and the like.

The application belongs to the technical field of medical devices, and provides a single-knee prosthesis tibial tray and a mounting method, which comprises a prosthesis tibial tray body, a support wing and a support column are arranged on the prosthesis tibial tray body; the support wing is connected with the side wall of the prosthesis tibial tray body, and the support wing is embedded into the non-cutting side of the tibia; the support column is connected with the lower end of the prosthesis tibial tray body, and the support column is embedded into the tibia below the tibial bone cutting surface. The above scheme sets the support wing and the support column on the prosthesis tibial tray body, supports and fixes the prosthesis from two different positions and different directions of the side wall and the lower end, respectively, disperses and transmits the load borne by the prosthesis to the larger bone area of the tibia, effectively increases the stress area, avoids the load concentration in the local area of the tibial cutting surface, and reduces the fracture risk of the tibial cutting surface.

This invention proposes a total knee arthroplasty, comprising a tibial liner and a femoral prosthesis. The medial articular surface is constructed as a curved surface with a sagittal radius of RTM, and the distal surface of the medial condyle is constructed as a curved surface with a sagittal radius of RFM that overlaps with the medial articular surface, wherein 1:1.1≥RFM:RTM≥1:1.8. The medial articular surface of the proposed total knee arthroplasty is an arc with a single radius in the medial sagittal plane, and there is a relatively high fit between the medial articular surface and the medial condyle. This ensures stable rotation of the total knee arthroplasty around the medial side and provides a certain range of anterior-posterior displacement for the medial condyle, improving the high flexion performance of the total knee arthroplasty. The high fit between the medial articular surface and the medial condyle also provides a large contact area, effectively reducing wear on the total knee arthroplasty and extending its service life.

The application provides a universal ball shaft type anti-dislocation tumor knee joint prosthesis containing CFR-PEEK material and belongs to the technical field of medical devices. The prosthesis comprises a tibial pad installed in the middle part of the prosthesis, a connecting disc installed at the bottom of the tibial pad, and a universal ball shaft installed at the middle position of the inner wall of the prosthesis. An auxiliary anti-dislocation assembly is used for limiting the universal ball shaft and is connected with the connecting disc. The auxiliary anti-dislocation assembly is arranged, some reinforcing parts are cancelled during the installation of the upper and lower assemblies of the prosthesis, on one hand, the redundant steps during disassembly and assembly are reduced, the flexibility and convenience of disassembly and assembly are improved, on the other hand, the stability of the middle position of the prosthesis is not reduced due to the loosening of the reinforcing parts after a period of use, and the normal use of the knee joint prosthesis is facilitated.

The application discloses a child tibia tumor type rotary hinge knee joint prosthesis and belongs to the medical instrument field, which comprises: a femur end prosthesis, a tibia pad and a bionic joint connecting piece. The femur end prosthesis comprises a positioning plate body, the positioning plate body is provided with a connecting part and a butt joint rod, the tibia pad is detachably connected with the positioning plate body and is provided with a concave arc joint surface, the bionic joint connecting piece is provided with a butt joint hole and a rotating pin, the butt joint hole is movably connected with the butt joint rod through a ligament bionic mechanism, the bionic joint connecting piece is allowed to rotate around the butt joint rod and is allowed to reciprocate along the axis of the butt joint rod within a set distance range, and the ligament bionic mechanism generates an elastic restoring force when the bionic joint connecting piece and the butt joint rod relatively displace, the tibia end prosthesis is provided with a connecting hole and is rotatably connected with the rotating pin through the connecting hole, and the tibia end prosthesis is further provided with a convex arc joint surface. Through the above arrangement, the tibia end prosthesis is allowed to rotate around the butt joint rod and the rotating pin respectively, so that the internal and external rotation actions and the flexion action of the lower leg are realized.

An orthopaedic implant includes a patella component having a metal base with a polymer bearing molded thereto. A method for making a patella component is also disclosed.

An insert for use in a knee prosthesis is disclosed. In one embodiment, the insert includes a medial compartment and a lateral compartment. The medial compartment includes a top surface having a concave surface or curve with a more posterior sulcus and increased anterior lip. The lateral compartment includes a top surface having at least a segment or portion with a convex surface or curve. Thus arranged, the insert is arranged and configured to provide improved stability for varying grades of PCL deficiencies compared to existing inserts that have a mid-line sulcus and lateral convexity. In addition, the insert provides improved lateral posterior translation compared to existing designs with a concave or flat lateral articulation that lack a lateral posterior convexity.

The invention discloses a knee joint prosthesis evaluation method and system, and the method comprises the steps: carrying out the multi-modal data collection according to the biomechanical performance test data of a knee joint prosthesis, the medical image data and the postoperative motion capture data of a patient, and carrying out the data fusion through a multi-modal alignment network based on deep learning, a fused multi-modal data set is obtained; inputting the multi-modal data set into an adaptive convolutional neural network, and extracting mechanical characteristics of the knee joint prosthesis under a dynamic load to obtain a dynamic mechanical characteristic matrix; and inputting the dynamic mechanical characteristic matrix into a performance evaluation model based on a multi-scale attention mechanism, performing prosthesis performance quantitative analysis, and generating a performance evaluation report. By utilizing the embodiment of the invention, comprehensive quantitative analysis of the prosthesis performance can be realized, and scientificity and accuracy of prosthesis design are improved.

An orthopedic knee prosthesis (10) comprises a femoral component having a metal base (84) from which a polymer joint layer is molded. A method for fabricating a metal-reinforced femoral component for an orthopedic knee prosthesis is also disclosed.

The invention provides a knee joint prosthesis which comprises a tibial plateau prosthesis, a tibial spacer prosthesis, a femoral condyle prosthesis and an extension rod device, the extension rod device comprises a rod body and a rod sleeve, the rod body and the rod sleeve are arranged in an embedded mode, the rod body is movably arranged on the rod sleeve in the axial direction of the rod sleeve, and a plurality of limiting grooves are formed in the rod body; the limiting structure is movably arranged on the rod sleeve in the circumferential direction of the rod sleeve, the limiting structure is provided with a limiting position and a separating position, when the limiting structure is located at the limiting position, the limiting structure is located in one limiting groove and matched with the limiting groove in a limiting mode, the rod sleeve and the rod body are kept relatively static, and when the limiting structure is located at the separating position, the limiting structure is located in the other limiting groove and matched with the limiting groove in a limiting mode. When the limiting structure is separated from the limiting groove, the rod body can move relative to the rod sleeve; the first reset structure applies reset force to the limiting structure so that the limiting structure can be kept at the limiting position. According to the technical scheme, the problem that in the prior art, after the length of an extension rod device is adjusted, the stability of the extension rod device is poor is effectively solved.

The application provides a knee joint prosthesis and a tibial platform thereof, wherein the tibial platform comprises: a second support platform which is arranged at intervals with a first support platform and can be adjusted in position relative to the first support platform; a first end of a transmission member is movably arranged on the first support platform, and a second end of the transmission member is arranged on the second support platform; a driving structure comprises a mounting member and a driving member which is rotatably arranged on the mounting member, the rotation axis of the driving member is arranged perpendicularly to the axis of the mounting member, the mounting member is rotatably arranged on the first support platform around the axis thereof, so as to drive the transmission member to rotate around the axis of the mounting member through the driving member, and when the driving member rotates relative to the mounting member, the driving member and the transmission member are drivingly matched, so as to drive the transmission member to rotate in a direction parallel to the rotation axis of the driving member. The technical scheme of the application effectively solves the problem of inconvenient relative position adjustment of the first support platform and the second support platform of the tibial platform in the related art.

This invention discloses a tibial liner and a knee joint prosthesis. The tibial liner includes a medial fossa and a lateral fossa. The posterior end of the medial fossa has a medial posterior lip, and the posterior end of the lateral fossa has a lateral posterior lip. The upper end of the lateral posterior lip has a cross-sectional area, the outer side of which is not higher than the inner side, and the front end of which is not higher than the rear end. The tibial liner of this invention has a reasonable structural design and good performance.

Prosthetic component provided with a stem, adapted to be implanted in use at a bone of a patient, such as for example a tibial and / or femoral component of a knee prosthesis or a femoral component of a hip prosthesis or a humeral component of a shoulder prosthesis, or a component of an elbow prosthesis, including a device adapted to externally cover and / or to house at its interior at least the stem of the prosthetic component, wherein the device is in use placed between the prosthetic component and the bone of the patient, suitable to stably constrain in use the prosthetic component to the bone of the patient and to prevent the direct contact between prosthetic component and bone of the patient.