101 results about "Knee prosthesis" patented technology

The invention provides a tibial plateau assembly and a knee joint prosthesis with the tibial plateau assembly.The tibial plateau assembly comprises a first driving part arranged on a tibial plateau and hinged to a tibial pad, the first driving part has a first driving state and a first static state, and when the first driving part is in the first driving state, the first driving part drives the tibial pad to rotate; the first driving piece can stretch out and draw back in the direction from the tibia platform to the tibia gasket; the second driving piece and the first driving piece are arranged on the tibia platform in a spaced mode, the second driving piece is hinged to the tibia gasket, the second driving piece has a second driving state and a second static state, and when the second driving piece is in the second driving state, the second driving piece can stretch out and draw back in the direction from the tibia platform to the tibia gasket; the first driving part and the second driving part are matched to adjust the distance and / or the inclination angle between the tibia gasket and the tibia platform. According to the technical scheme, the problem that the relative position between the tibia gasket and the tibia platform cannot be adjusted in the prior art is effectively solved.

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.

The invention provides a knee joint prosthesis and a lower limb prosthesis, and relates to the technical field of medical instruments. The knee joint prosthesis comprises a knee joint upper body, a knee joint lower body and a hydraulic rod; an offset rotating shaft is arranged on the knee joint upper body, one end of the hydraulic rod is pivoted in the knee joint lower body, and the other end of the hydraulic rod is pivoted with the offset rotating shaft, so that the knee joint upper body can drive the hydraulic rod to do telescopic motion when rotating relative to the knee joint lower body; the knee joint upper body is provided with a pivoting hole used for installing the pivoting shaft and a compression seam, the compression seam is located above the pivoting hole, the top of the knee joint upper body is provided with a connector used for being connected with the leg of a patient, and the knee joint upper body is provided with a first threaded connecting hole used for installing the connector. A locking hole is formed in the first threaded connecting hole, the locking hole penetrates through the compression seam to be communicated with the pivoting hole, a locking clamping column is arranged in the locking hole, and a locking piece used for limiting the locking clamping column is arranged at the top of the locking hole. The technical effect of improving the stability of the prosthesis is achieved.

The invention provides a knee joint prosthesis and a tibial plateau thereof, and the tibial plateau comprises a second supporting platform and a first supporting platform which are arranged at an interval, and the position of the second supporting platform can be adjusted relative to the first supporting platform; the first end of the transmission part is movably arranged on the first supporting platform, and the second end of the transmission part is arranged on the second supporting platform; the driving structure comprises a mounting part and a driving part rotatably arranged on the mounting part, the rotating axis of the driving part is perpendicular to the axis of the mounting part, and the mounting part is rotatably arranged on the first supporting platform around the axis of the mounting part, so that the driving part drives the transmission part to rotate around the axis of the mounting part; the driving part is in driving fit with the transmission part so as to drive the transmission part to rotate in the direction parallel to the rotating axis of the driving part. According to the technical scheme, the problem that in the prior art, the relative position of the first supporting platform and the second supporting platform of the tibial plateau is inconvenient to adjust is effectively solved.

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 invention provides a universal ball shaft type anti-dislocation tumor knee joint prosthesis containing a CFR-PEEK material, and belongs to the technical field of medical equipment. Comprising a prosthesis, a tibia liner is installed in the middle of the prosthesis, a connecting disc is installed at the bottom of the tibia liner, and a universal ball shaft is installed in the middle of the inner wall of the prosthesis; and the auxiliary anti-disengaging assembly is used for limiting the universal ball journal, and the auxiliary anti-disengaging assembly is connected with the connecting disc. By arranging the auxiliary anti-falling assembly, in the process of installing the upper assembly and the lower assembly of the prosthesis, use of some reinforcing parts is omitted, on one hand, redundant steps during disassembly and assembly can be reduced, and the disassembly and assembly flexibility and convenience are improved; on the other hand, after the knee joint prosthesis is used for a period of time, the stability of the middle position of the prosthesis cannot be reduced due to looseness of reinforcing parts, and subsequent normal use of the knee joint prosthesis is facilitated.

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 surgical instrument for use during a surgical procedure to implant a tibial tray into a surgically-prepared proximal end of a tibia and a femoral component into a surgically-prepared distal end of a femur is disclosed. The surgical instrument includes a metallic impaction handle and a removable polymeric impaction insert.

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 discloses a two-degree-of-freedom dynamic compensation below-knee prosthesis and a multi-mode control system and method, and belongs to the technical field of artificial below-knee prostheses. The two-degree-of-freedom dynamic compensation below-knee prosthesis comprises a prosthesis foot plate, a pitching joint, an inward and outward turning joint and a receiving cavity; the pitching joint is connected with the limb foot plate through the pitching support and can drive the limb foot plate to complete pitching motion around the bottom support. The inward and outward turning joint is connected with the pitching joint through the upper support and can control the shank support to achieve inward and outward turning movement around the inward and outward turning shaft. An induction control system is arranged to monitor inertia signals when a wearer walks in real time and receive pressure changes in the cavity walking process, sensor data are analyzed, normal gait motion characteristics are combined, the motion intention of the wearer is recognized, and an artificial limb system control strategy is adjusted; the control strategy is fed back and adjusted in real time according to the gait recognition result so as to meet the requirements for damping change and ankle joint angle change of the artificial limb system in different movement modes.

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 provides a knee joint prosthesis, which comprises a tibial plateau part, an elongated handle and a filling assembly; the filling assembly is arranged between the tibial plateau part and the elongated handle to connect the tibial plateau part and the elongated handle; wherein the filling assembly comprises a first adjusting part and a filling piece, the first adjusting part and the filling piece are detachably connected, the first adjusting part is used for being connected with the elongated handle, and the filling piece is used for being connected with the tibial plateau part; the filling piece comprises a second adjusting part, the second adjusting part has an extension part, the extension part is movably arranged, the area of the outer circumferential surface of the second adjusting part is increased by pushing the extension part to move, the outer circumferential surface of the second adjusting part can be in contact with the bone defect of the corresponding knee joint, and the effect that the second adjusting part is well matched with the bone defect of the corresponding knee joint is achieved; it can be seen that the knee joint prosthesis can meet different knee joint bone defect situations and has good universality.

1. Name of the designed product: knee prosthesis component. 2. Use of the designed product: for knee replacement. 3. Design points of the designed product: in shape. 4. Picture or photo best indicating the design points: perspective view 1.

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 a knee joint replacement surgery navigation system. Relates to the technical field of medical treatment, and comprises a pre-operation processing unit used for determining a gradient pore model corresponding to a target object according to a knee joint medical image of the target object; the intra-operation processing unit is used for determining target pose information of an operation tool based on the multi-modal acquisition data in the implantation process of the personalized knee joint prosthesis, and performing reconstruction processing on the knee joint three-dimensional model of the target object based on the target pose information to obtain a processed knee joint three-dimensional model; and the postoperative processing unit is used for monitoring the knee joint state of the target object based on the implantable sensor after the personalized knee joint prosthesis is implanted, and executing a corresponding target early warning strategy according to abnormal information of the knee joint state under the condition that the knee joint state is detected to be abnormal. According to the invention, the problem of low positioning accuracy of a knee joint replacement surgery navigation system in the prior art is solved.

A method for producing a partial or total knee prosthesis suitable for human anatomy of an individual patient, the method comprising a design step of taking into account the patient's current and pre-lesion knee motion behavior, and further taking into account the patient's individual hip-knee-ankle joint (HKA) mechanical alignment, and utilizing these inputs, to produce a partial or total knee prosthesis suitable for human anatomy of the individual patient. A knee joint model as natural is recreated, where still the recreated natural knee joint model rather than the diseased knee joint model is used to create a prosthesis that recreates the natural knee joint.

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.

A tibial baseplate for tibial component of a knee prosthesis including: a bulk solid portion including a proximally facing surface adapted to accommodate a bearing element for the articulation of a femoral component of the knee prosthesis; a plurality of porous portions integral with the bulk solid portion having a porous portion contacting surface opposite to the proximally facing surface adapted to contact a proximal tibia. Advantageously, the plurality of porous portions are seamlessly incorporated and embedded in the bulk solid portion.

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.