130 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 orthopaedic knee prosthesis includes a tibial bearing component with articular features which operate to protect adjacent soft tissues of the natural knee, promote and / or accommodate desired articulation with an abutting femoral component, and facilitate expedient and effective implantation by a surgeon.

An orthopedic tibial prosthesis includes a tibial baseplate with an asymmetric periphery which promotes proper positioning and orientation on a resected tibia, while also facilitating enhanced kinematics, soft-tissue interaction, and long-term fixation of the complete knee prosthesis. The asymmetric baseplate periphery is sized and shaped to substantially match portions of the periphery of a typical resected proximal tibial surface, such that proper location and orientation is evident by resting the baseplate on the tibia. The baseplate periphery provides strategically positioned relief and / or clearance between the baseplate periphery and bone periphery, such as in the posterior-medial portion to prevent deep-flexion component impingement, and in the anterior-lateral portion to avoid undue interaction between the anatomic iliotibial band and prosthesis components.

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.

The invention relates to the technical field of medical instruments and robots, and discloses an active and passive knee joint artificial limb structure and a control and reinforcement learning parameter adjusting method.The active and passive knee joint artificial limb has various working mode combinations such as complete active, complete passive and active and passive combination and meanwhile has the extremely high exercise ability upper limit and cruising ability upper limit; the invention further discloses an active and passive knee joint artificial limb control method, an active mode or a passive mode is respectively entered in different stages of human body movement gaits, and more movement modes including walking, going up and down stairs, running and the like are met. The invention further discloses a reinforcement learning parameter adjusting method of the active and passive knee joint prosthesis, gait features of the uninjured side are used as a learning target, the motion of the prosthesis joint is matched with the uninjured side as much as possible by minimizing angle errors and phase deviation, and personalized efficient customization and continuous optimization of prosthesis control parameters are achieved.

An impaction handle for use during a surgical procedure to implant a tibial tray into a surgically-prepared proximal end of a tibia includes an impact plate defining a proximal end of the impaction handle and an impact head defining a distal end of the impaction handle. The impaction handle also has an elongated shaft extending between the impact plate and the impact head, along with a locking mechanism to lock the handle to the tibial tray. The impact plate, the impact head, the elongated shaft, and the locking mechanism of the impaction handle collectively define a single monolithic metallic component.

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 belongs to the technical field of medical treatment, and discloses a knee joint prosthesis which comprises a cushion block, a tibia platform is connected to the bottom of the cushion block, and a connecting block is arranged at the bottom of the tibia platform. An extension rod is held to drive an insertion rod to move upwards along the inner wall of a connecting cylinder, the insertion rod drives a first rectangular block to move upwards, when rectangular holes formed in the two outer sides of the first rectangular block coincide with rectangular holes formed in the two outer sides of a second rectangular block, a cross wrench is taken to enter a circular hole in the outer portion of a connecting block to make contact with a circular block, and the circular block is rotated to drive a threaded rod to rotate; a threaded rod rotates to drive a first pulley to rotate, a belt and a second pulley to rotate, a threaded rod on the other side is driven to rotate, a bolt is driven to move towards the middle along positive and negative threads arranged outside the threaded rod, the fixing effect on a first rectangular block and a second rectangular block is improved, and fixing of the first rectangular block and the second rectangular block is improved in the process; the situation that the prosthesis is loosened is reduced, and the stability of the knee joint prosthesis is improved.

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.

The present invention provides a knee joint prosthesis. The knee joint prosthesis includes a supracondylar member, an infracondylar member, and a connecting rod member. A first curve-shaped meshing tooth structure is fixedly arranged at the lower part of the supracondylar member, and a curve-shaped sliding groove is formed on the first curve-shaped meshing tooth structure. A sliding hinge part is fixedly arranged on the infracondylar member, and the sliding hinge part is installed in the curve-shaped sliding groove. A second curve-shaped meshing tooth structure is also hingedly arranged on the infracondylar member. The first end of the connecting rod member is hinged to the first curve-shaped meshing tooth structure, and the second end of the connecting rod member is hinged to the second curve-shaped meshing tooth structure. The second curve-shaped meshing tooth structure is connected to the supracondylar member through a revolute pair, and supplemented with a simple connecting rod mechanism. On the premise of ensuring that the meshing teeth do not separate and do not consume energy, the change in the length of the upper and lower structures of the knee joint and the change in the instantaneous center of the knee joint are completely simulated, making the knee joint prosthesis more convenient to use.

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.

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.