34 results about "Total knee replacements" patented technology

A knee replacement prosthesis comprising a femoral component and a tibial component that enable anterior-posterior translation of the femur relative to the tibia and enable the tibia to rotate about its longitudinal axis during flexion of the knee. The femoral component connects to the distal end of a resected femur and includes medial and lateral condyles having distal, articulating surfaces, and a patellar flange having a patellar articulating surface. The tibial component connects to the proximal end of a resected tibia and includes a proximal bearing surface with medial and lateral concavities that articulate with the medial and lateral condyles. The articulating surfaces of the condyles and concavities are defined by sections of toroids.

A bone surgery device with a reciprocating cutting head. The device comprises several sets of shaping surfaces sometimes including cutting blades, which are located and oriented so as to shape the distal end of the femur and the proximal end of the tibia for total knee replacements and unicompartmental knee replacements. The device, which may be hand directed or aided by spatial and directional guiding mechanisms or an optical navigation system, may also include both coolant supply for controlling heat during bone cutting and shaping, and a suction method for carrying away fluid and debris. The device is substantially configured to the artificial joint component to be attached thereto.

A six-degree-of-freedom parallel and oscillating guide bar mechanism combined knee-replacing prosthesis abrasion tester comprises a right part, a left part and a base; the right part is on the right side of the abrasion tester, and is a driving structure; the left part is on the left side of the abrasion tester, and is an actuating structure; a flywheel in the right part is connected with a slider and a guide bar in the left part through a connecting part, and the right part and the left part are fixedly mounted on the base. The abrasion tester overcomes the defects of the prior art, can carry out a knee prosthesis abrasion test which can simulate the motion characteristics of the knee joint of the human body, is used in a knee prosthesis surface abrasion prediction test and a new prosthesis profile abrasion test, and provides technique and data for total knee replacement. The abrasion tester has high practical value and a broad application prospect in the fields of biomedicine and medical equipment manufacturing.

The invention provides an osteotomy execution system, a positioning method, a control method and a simulation execution method for primary total knee replacement surgery operation. The osteotomy execution system for the primary total knee replacement surgery operation comprises: a man-machine interaction device; a surgical robot which comprises a mechanical arm; an osteotomy guider which is fixedto the operation end of the mechanical arm and used for positioning and guiding an osteotomy tool during osteotomy operation of total knee replacement, wherein the osteotomy guider is provided with athrough groove for containing the osteotomy tool; a lower limb tracking system which is used for acquiring position data of thighbone and tibia; an osteotomy guider tracking system which is used for acquiring position data of the osteotomy guider; and an upper controller which is in communication connection with the man-machine interaction device, the surgical robot, the lower limb tracking systemand the osteotomy guider tracking system. The system provided by the invention can improve the execution effect and efficiency of the joint replacement surgery operation.

The invention discloses a knee joint balance detection system in total knee replacement and a balance discrimination method thereof. The system is characterized in that a left pressure sensor set anda right pressure sensor set are attached to the left and right regions of a gasket, in the operation process, the gasket is placed in a gap between the thigh bone prosthesis and the tibia bracket, data of the left and right sensor sets can be obtained during 0-degree knee bending, 90-degree knee bending, internal rotation and ectropion, due to data analysis, whether the knee joints are located inthe balanced state or not is judged, and if the knee joints are in the non-balanced state, by properly repairing bones or adjusting the position of a prosthesis, the knee joints are in the balanced state finally. By keeping the position unchanged, surgical suturing is performed. By improving the accuracy of surgical knee joint balance, the important role in prolonging the service life of the postoperation prosthesis of a patient, reducing postoperative complications, and improving the postoperation living quality of the patient is achieved.

The invention provides a tibia guide plate for total knee arthroplasty and a use method thereof. The tibia guide plate for total knee arthroplasty comprises a tibia guide plate body, a tibia osteotomy groove is formed in the first side of the tibia guide plate body, the tibia osteotomy groove penetrates through one end of the tibia guide plate body, and a sickle blade is inserted into the tibia osteotomy groove; a fitting groove is formed in the second side of the tibia guide plate body; and a force line rod fixing plate parallel to the tibia osteotomy groove is arranged at one end of the tibia guide plate body, and a force line rod inserting hole capable of allowing a force line rod to be inserted is formed in the end, away from the tibia guide plate body, of the force line rod fixing plate. By arranging the fitting groove, alignment fitting with the front inner side of the tibia is achieved, accurate positioning assembly of the tibia guide plate and the tibia is guaranteed, the tibia osteotomy groove is aligned with the tibia osteotomy face, the sickle blade is inserted into the tibia osteotomy groove, the tibia osteotomy amount is accurately verified, and accurate positioning of osteotomy of an operation is guaranteed; and the safety and success rate of a sugery are improved, and the tibia guide plate is simple in structure, convenient to operate and accurate in positioning.

The invention discloses a total knee replacement operating table which comprises a square table plate. A shell with an upper opening structure is fixedly mounted on the upper portion, close to one endof the square table plate, of the square table plate, two groups of foot fixing units are symmetrically arranged on the side wall, close to one end of the square table plate, of the inside of the shell, two U-shaped grooves are symmetrically formed in the side wall, close to the other end of the square table plate, of the shell, two groups of leg supporting units are symmetrically arranged at thepositions, close to the U-shaped grooves, of the inside of the shell, a through hole is formed in the bottom wall of the shell, and a liquid storage unit is fixedly mounted at the bottom of the square table plate and positioned below the through hole. The operating table is simply and conveniently cleaned and cannot be polluted by liquid generated by total knee replacement operation of a patient,a good position is provided for medical staff when the total knee replacement operation of the patient is implemented, so that the operation is smoothly completed by the medical staff, and the operating table is worthy of popularization.

The invention discloses an osteotomy verification marking nail which comprises a marking nail head, a marking nail upper section with a thread, a marking nail lower section without a thread and a marking nail conical tail section which are sequentially and coaxially connected from top to bottom, and can be used for a total knee joint replacement operation under the assistance of a robot to determine whether a bone target of the surgical robot is displaced relative to the bone of a patient. The invention further discloses a matched integrated driving-in and taking-out device of the osteotomy verification marking nail. The matched integrated driving-in and taking-out device comprises a driving-out and taking out column, a driving-out and taking-out hammer and a marking nail connector, wherein the driving-out and taking-out column comprises a driving-out and taking-out column top, a driving-out and taking-out rod, a driving-out and taking-out handle and a driving-out and taking-out column bottom; the driving-out and taking-out hammer comprises a knocking ring and a knocking handle; and the marking nail connector comprises a connector top and a connector column arranged at the bottom end of the connector top, a groove is upwards formed in the bottom end face of the connector column, and a cylindrical magnet, an upper-layer connector and a lower-layer connector are sequentially arranged in the groove from top to bottom. The integrated driving-in and taking-out device is convenient for doctors to rapidly drive in or take out marking nails in the operation, and can improve the operation efficiency.

The invention relates to a tibial plateau. The tibial plateau is used for installing plateau liners and can realize switching of the fixed plateau liner and the movable plateau liner on the same tibial plateau. The tibial plateau comprises a tibial plateau surface, a central handle, a central hole, a dovetail part and a plateau front fixing piece, wherein the dovetail part comprises a wedge-shapedfixing structure and a guiding structure; the wedge-shaped fixing structure can be used for fixedly keeping the fixed platform liner on the tibial plateau surface; and the side surface of the platform front fixing piece and the side surface of the wedge-shaped fixing structure of the dovetail part located on the other side of the center hole are suitable for stopping the rotating movable platformliner at the same time. The invention further relates to the fixed type platform liner and the movable type platform liner which are matched with the tibial plateau. The invention also relates to a prosthesis system for primary total knee replacement, which comprises a femoral condyle, the tibial plateau and the fixed plateau liner or the movable plateau liner, wherein the femoral condyle has a high degree of conformity with the sagittal posterior arc of the movable plateau liner.

The invention discloses a rotary clamping type shin support and shin pad assembled structure for total knee replacement and an implementation method thereof. The assembled structure comprises a fixed circular groove and a plurality of circular arc grooves with locking mechanisms, wherein the fixed circular groove and the circular arc grooves are arranged at the upper surface of the shin support, the fixed circular groove is arranged in the center position of the upper surface of the shin support, and a positioning bone column is arranged at the lower surface of the shin support; a fixed round column and a plurality of circular arc bodies matched with the circular arc grooves are arranged at the lower surface of the shin pad; when assembled, the fixed round column on the shin pad is aligned with the fixed circular groove of the shin support and pressed in downward, so the shin support is totally fit to the shin pad, then the shin pad is rotated so that the circular arc bodies rotate in the circular arc grooves, the boundaries are completely superposed, the locking mechanisms on the circular arc grooves and the circular arc bodies take effect, and the shin pad and the shin support are completely fixed. The rotary clamping type shin support and shin pad assembled structure for total knee replacement can ensure the assembling stability of the shin support and the shin pad and improve the quality of a total knee replacement operation, and a shin support and shin pad device for total knee replacement can be quickly produced for individual patients.

A knee prosthesis for total knee replacement has femoral and tibial joint components. The femoral component has a medial condyle, a lateral condyle and an intercondylar recess between the condyles. The condyles in sagittal profile both have spiral outer surfaces, wherein the increasing anterior-to-posterior radii of curvature for the medial condyle is smaller than the corresponding radii of curvature for the lateral condyle. The tibial component has shallow concave medial and lateral condyle surfaces for receiving corresponding condyles of the femoral component as bearing surfaces when the femoral and tibial components are biased together under applied tension by ligaments. Posterior portions of each femoral condyle that contact the corresponding tibial condyle up to 90° flexion are substantially spherical in shape, with gradually increasing radii in coronal profile as flexion increases, while the anterior portions beyond 90° flexion are substantially elliptical in shape in coronal profile.

The invention relates to the technical field of total knee joint replacement, and in particular relates to a method for realizing dynamic soft tissue balance judgment in total knee joint replacement.The method includes the following steps: obtaining a posture angle of a leg posture, and obtaining the following three postures: a knee joint extension and flexion angle alpha, a knee joint internal rotation and external rotation angle beta and a hip joint adduction and abduction angle gamma; performing standardization treatment on the alpha, beta and gamma data, and performing data normalization;and performing dynamic soft tissue balance judgment. In the method for realizing the dynamic soft tissue balance judgment in the total knee replacement surgery, a six-axis posture sensor is used to collect the intraoperative leg posture data, and a dynamic soft tissue balance judgment formula is constructed to perform soft tissue balance judgment to guide a doctor to make timely correction through a clinical technical means during operation, so that accurate recovery of a lower limb force line is realized; and the dynamic soft tissue balance judgment provided by the invention does not requiremuch time to learn, is easy to operate, and is inexpensive for mass production in the future.

The invention provides a navigation device for total knee arthroplasty of knee fusion. The navigation device comprises an osteotomy guide plate; a thighbone osteotomy slot, a wedge-shaped osteotomy slot and a tibia osteotomy slot which penetrate through the guide plate are formed in the osteotomy guide plate sequentially from top to bottom; the osteotomy guide plate is provided with a verification hole and a verification face; the verification surface is used for extramedullary observation and verification of an osteotomy surface; a metal nail is put in the verification holes and is used for verifying the osteotomy surface in a perspective view field; fastening via holes are formed in each of the upper end and the lower end of the osteotomy guide plate; and the fastening via holes are used for screws penetrate through to be fixed to a joint. According to the navigation device, whether the guide plate is in a horizontal state or not is observed through the verification surface, thereby judging whether the guide plate is consistent with an actual desired osteotomy direction or not; the Kirschner wire is put in the verification hole, and whether the Kirschner wire is consistent with a designed osteotomy direction or not can be observed in an operation, thereby implementing a design conception of intramedullary design and extramedullary verification; the guide plate can be accurately placed, and navigation is provided for osteotomy operation, thus guaranteeing the osteotomy accuracy.

The invention discloses a knee joint active flexion and extension function exercise robot used after artificial total knee replacement. The robot comprises a base used for installing all parts, wherein a thigh clamping device used for fixing the thigh is arranged on the base; an exercise device used for driving the shank to move the knee joint is arranged at the front end; an automatic adjusting seat cushion is arranged on the base and can be conveniently used by users of various body types; and a two-section moving device is arranged on the thigh clamping device, so that the thigh can be fully fixed, the exercise device at the front end can achieve various different movement modes, and various knee joint recovery exercises are met. The two-section clamping auxiliary device can enable the user to fully move the knee joint when the user has no ability to move the knee joint independently, and the multi-step auxiliary device of the exercise device can restore the stress condition of the user in the normal walking process to the maximum degree.

The invention relates to a knee joint replacement flexion and extension gap measuring and balancing device. The device comprises a connecting and positioning shaft, a movable tibial plateau supportingplate and a fixed femoral condyle supporting plate; ratchets are distributed on the surface of the connecting positioning shaft in the axial direction, and holes are formed in the top end; an openingis formed in the U-shaped bottom plate surface of the movable tibial plateau supporting plate; the movable tibial plateau supporting plate is further provided with a pawl middle portion, the top endsof pawls are used for abutting against the ratchets, and the tail ends of the pawls are connected to the movable tibial plateau supporting plate through a spring; and a connecting shaft is arranged at the U-shaped bottom of the fixed femoral condyle supporting plate and provided with an expansion block. A guide block is vertically arranged on the fixed femoral condyle supporting plate, and a drill bit guide hole is formed in the guide block. The device has the advantages that the joint gap can be conveniently measured and balanced, and total knee replacement is facilitated.

The present application provides a total knee arthroplasty robot auxiliary system, a control method, electronic device and a computer readable medium. The auxiliary system comprises: a preoperative planning system configured to formulate a preoperative plan, preoperative plan data including a knee joint image; an intraoperative planning system configured to formulate an intraoperative plan, wherein the knee joint image in the preoperative plan and a knee joint surface contour of the patient determined in an operation are subjected to image registration, knee joint dynamic spacing force line data at a continuous flexion-extension angle is acquired, a dynamic spacing force line data graph is visually displayed, and a prosthesis plan is adjusted according to the visual display of the dynamic spacing force line data graph to obtain the intraoperative plan; and an executing system, wherein a bone-cutting guide mounted at an operating end of a mechanical arm of a surgical robot is guided to be located in a planned predetermined position according to the intraoperative plan, and the bone-cutting guide is configured to locate a bone-cutting saw.

The invention relates to the technical field of evaluation and analysis systems, in particular to a total knee arthroplasty evaluation and analysis system based on stepped diagnosis and treatment, which comprises questionnaire survey management and background management. The rear end of the questionnaire survey management is connected with the background management. The total knee arthroplasty evaluation and analysis system based on stepped diagnosis and treatment is favorable for better analyzing subjective evaluation before a TKA operation and the improvement condition of joint movement during post-operation follow-up visit, the clinical intervention effect of a patient is reflected more comprehensively and systematically, the post-operation follow-up visit process of the patient is further simplified, and benign interaction and health-care rehabilitation of doctors and patients are promoted.

A total knee replacement prosthesis assembly (10) comprising a femoral component (20), a tibial component (30) having a tibial platform (32), and a bearing component (40), the bearing component having an inferior side (40b) and a superior side (40a), the bearing component being adapted to be arranged between the femoral component and tibial platform when assembled, the tibial platform having a post (36) upstanding from it and the bearing component having a post recess (46) in its inferior side for receiving the post, the bearing component being rotatable about the post when assembled, the post and bearing component each having a transverse bore and the assembly further comprising an axle (60), at least part of the axle being received through the transverse bore (38) in the post when assembled and at least part of the axle being received through the transverse bore (52) in the bearing component when assembled, the axle being configured to provide an axis of rotation between the femoral component and bearing component which is fixed relative to the femoral component and the bearing component in use.

The invention belongs to the field of orthopedic surgery tools, and in particular relates to structure of an infrapatellar fat pad quantitative excision tool. An infrapatellar fat pad excision device comprises a patellar fixator, a locating rod, a ligamentum patellae determination rod and an exsector, wherein the patellar fixator comprises a pair of calipers and a ligamentum patellae fixing rod. With the application of the infrapatellar fat pad excision device, excessive infrapatellar fat pads can be excised to expose an operation field, and meanwhile, dense vascular areas of the infrapatellar fat pads can be effectively reserved, so as to relieve complications which are caused by excising the dense vascular areas together with the infrapatellar fat pads which are excised too much; the excision device is convenient for doctors of joint surgery to operate; and the excision device is conducive to the implementation of a total knee replacement operation.