53 results about "Arthroplasty knee" patented technology

Knee arthroplasty implants, instruments, systems, and methods of implanting the same. The knee arthroplasty implants may include a femoral implant and a tibial tray implant, each with trabecular surfaces configured to contact bone to provide a scaffold for bone healing and interdigitation. The implants may also include fixation pegs with bulleted profiles to increase the surface area for bone ingrowth. An inserter instrument may include a sliding rack, which is incrementally extended with a rotatable shaft, thereby allowing for quick lock and release of various tibia trays.

The present application relates to the technical field of medical image processing, and provides a knee femur and tibia segmentation method based on region growing, comprising the following steps: S1, acquiring knee medical images; S2, selecting a growth seed point; S3, coarsely segmenting the knee medical images to obtain knee stem data; S4, finely segmenting the knee medical images to obtain knee connection data; S5, fusing the knee stem data and the knee connection data to obtain knee femur and tibia image data with complete contours; S6, coarsely filling the knee femur and tibia image data to obtain knee femur and tibia image data after coarse filling; and S7, iteratively filling holes in the knee femur and tibia image data by using a three-dimensional sliding window, so as to obtain image data that is consistent with the surrounding data in shape, position and completeness and smoothness. The present application solves the problems of slow segmentation speed, unstable segmentation effect, incomplete segmentation and adhesion in preoperative planning of knee replacement surgery.

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 application relates to a dual-arm knee replacement robot with an extended axis, comprising: a robot body, a drive unit, an extended movement mechanism, an auxiliary fixation arm, and a limb fixation unit. The drive unit is mounted on the robot body. The extended movement mechanism is connected to the drive unit and is located on one side of the robot body. The front end of the auxiliary fixation arm is mounted on the extended movement mechanism, and the end end is fitted with the limb fixation unit. The drive unit drives the auxiliary fixation arm to reciprocate or fix itself along a preset trajectory in the circumference of the robot body. By providing an extended movement mechanism on one side of the robot body, it can reciprocate within a preset trajectory in the circumference of the robot body, enabling automatic configuration of the auxiliary fixation arm on the left and right sides of the robot body. This allows the extended movement mechanism to be adjusted to the left position, increasing the application flexibility of the dual-arm knee replacement robot with an extended axis and improving its ease of use.

This application relates to the field of medical device technology, specifically to an extramedullary positioning distal femoral osteotomy device for knee replacement, comprising an osteotomy plate, an axial indicator, a rotating component, and a reference plate. The osteotomy plate has a reference end face and an abutment end face, with a cutting suture and pin holes provided on the reference end face. The axial indicator is rotatably mounted on the reference end face; the rotating component is rotatably mounted on the reference end face; the reference plate is slidably mounted on the rotating component, and the reference plate can slide on the rotating component in a direction away from or close to the rotation axis of the rotating component, with the reference plate perpendicular to the reference end face. In this application, the axial indicator determines the direction of the patient's femoral axis, ensuring that the movement of the osteotomy plate is consistent with the direction of the femoral axis, thereby improving the accuracy of the cutting position during surgery. The rotating component and the reference plate allow the surgeon to adjust according to the preoperatively determined angle of the prosthesis articular surface, enabling precise matching of the cutting suture angle with the prosthesis articular surface, further improving the precision of the surgery.

The application discloses a hip-knee joint replacement postoperative rehabilitation method and system based on mobile medical treatment, relates to the technical field of medical rehabilitation, and discloses the hip-knee joint replacement postoperative rehabilitation method and system based on mobile medical treatment. The wearable sensor is used for monitoring patient motion data in real time and recognizing compensatory behavior. A training plan is dynamically adjusted in combination with multidimensional indexes, the problems of missing compensation recognition, feedback lag and plan rigidity in the traditional rehabilitation scheme are effectively solved, the rehabilitation effect can be improved, and the risk of adjacent joint injury can be reduced.

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 kit for use in knee replacement surgery includes a trial patella component and a patella implant component. The trial patella component includes a backing plate having a backing surface for positioning against a patient's patella, and at least one sensor which can generate a signal corresponding to the compressive load applied to the trial patella component, and a first bearing plate which can be fitted to the backing plate and which, when fitted to the backing plate, provides a bearing surface for articulation against a bearing surface on the patient's femur. The patella implant component has a backing surface for fixation to a patient's patella instead of the backing surface of the trial patella component, and a bearing surface for articulation against a femoral bearing surface. The thickness of the patella implant component is greater than the thickness of the trial patella component when the first bearing plate is fitted to the backing plate, the difference between the said thicknesses being at least about 1 mm.

An extension-assisted hinged knee replacement comprises a femoral component, a tibial component, and a torque actuator operably interfacing the two components. The torque actuator is configured to apply extension torque based on the flexion angle of the knee, with the torque peaking between 0° and 90° of flexion. The implant may include a passive biasing element, which can be compressed or tensioned to enhance torque application, particularly during critical phases of knee extension.

A knee replacement prosthesis includes a distal femoral implant, including a femoral head portion, including an outer arcuate surface, and interior posterior surface, an interior distal surface disposed at a first angle with respect to the interior posterior surface, and a first interior intermediate surface joining the interior posterior surface and the interior distal surface and being disposed at a second angle with respect to the interior posterior surface and at a third angle with respect to the interior distal surface. The distal femoral implant includes stackable femoral spacers secured to at least one of the interior posterior surface and the interior distal surface, thereby adjusting an aggregate spacing between the interior posterior surface and / or the interior distal surface and a resected surface of a distal femur of the patient. A tibial implant is also provided. Related methods of use of either implant or both are also provided.

A knee alignment measurement tool for use during a total knee replacement surgery may include the following main components: a sensor assembly, a display unit configured to power up, operatively control the individual sensors of the sensor assembly, and display the readings therefrom, and a flexible gooseneck cable operatively connecting the sensor assembly to the display unit. The sensor assembly may include a rigid base supporting a circuit board, a left sensor and a right sensor positioned adjacent to the left center, and a cover sealed to the rigid base to enclose the left sensor and the right sensor, wherein the cover does not abut the rigid base during the compression of the sensor assembly.

Surgical instrument (1) for use in knee replacement surgery, comprising a first fastening device (100) which is designed for detachable fastening to a reference component (600) attached to a distal femur (F), a second fastening device (200), which is spaced distally from the first fastening device (100) and is designed for detachable fastening to a tibial cutting block (700) for cutting on a proximal tibia (T), a circular arc guide (300) which is connected at one end to the first fastening device (100) and at the other end to the second fastening device (200) and by means of which the second fastening device (200) is guided linearly movable relative to the first fastening device (100) in a sagittal guide plane (E) along a longitudinally extended circular arc guide track (C), a first linear guide (400) by means of which the circular arc guide (300) is connected at one end to the first fastening device (100) and is guided linearly movable relative to the same in the guide plane (E) along an anteroposteriorly longitudinally extended first guide track (L1), and a second linear guide (500), by means of which the second fastening device (200) is connected at the other end to the circular arc guide (300) and is guided linearly movable relative to the same in the guide plane (E) along an anteroposteriorly longitudinally extended second guide track (L2).

A TRIAL PATELLA COMPONENT KIT 5 A kit for use in knee replacement surgery includes a trial patella component and a patella implant component. The trial patella component includes a backing plate having a backing surface for positioning against a patient's patella, and at least one sensor which can generate a signal corresponding to the compressive load applied to the trial patella component, and a first bearing 10 plate which can be fitted to the backing plate and which, when fitted to the backing plate, provides a bearing surface for articulation against a bearing surface on the patient's femur. The patella implant component has a backing surface for fixation to a patient's patella instead of the backing surface of the trial patella component, and a bearing surface for articulation against a 15 femoral bearing surface. The thickness of the patella implant component is greater than the thickness of the trial patella component when the first bearing plate is fitted to the backing plate, the difference between the said thicknesses being at least about 1 mm. 20 25 20 25 66 10 A pr 2 02 5 A B S T R A C T 2 0 2 5 2 0 2 5 6 6 1 0 A p r 2 0 2 5 A T R I A L P A T E L L A C O M P O N E N T K I T

This invention discloses an extramedullary tibial osteotomy device for knee replacement surgery, belonging to the field of medical device technology. The device includes a main connecting rod, with an ankle fixation module below it. The ankle fixation module includes an ankle connecting seat, and an angle adjustment module for adjusting varus / valgus and anteversion / anteroversion angles is located behind the ankle connecting seat. The lower end of the main connecting rod is fixed to the angle adjustment module. Above the main connecting rod are a tibial measurement module and a tibial osteotomy module. An upper navigation module and a lower navigation module are respectively located at the upper and lower ends of the main connecting rod. Both the upper and lower navigation modules contain remote sensing modules for acquiring the tibial varus / valgus and anteversion / anteroversion angles. This invention's extramedullary tibial osteotomy device for knee replacement surgery is simple to operate, has a short operation time, and is inexpensive.

The present disclosure provides a knee replacement prosthesis including a plurality of sensors and at least one of a femoral component, a patellar prosthesis, and a tibial component.

The application discloses a kind of surgical robot control method and device, storage medium and electronic equipment.It relates to medical technology field, the method comprises: according to the preoperative planning of knee replacement, determine the multiple simulation bone cut surfaces of target object;Under each simulation bone cut surface, the workspace of surgical robot is calculated, and multiple first workspaces are obtained;According to the multiple first workspaces, determine the target workspace of the surgical robot, and control the surgical robot to perform action based on the target workspace.By the present application, the problem that the accuracy of surgical robot control is relatively low due to kinematic constraints that underdetermined degree of freedom surgical robot cannot be adjusted to all necessary operating postures in the related art is solved.

A knee extractor that can couple with a slap hammer. The slap hammer can move grippers of the knee extractor with respect to a main body. The knee extractor can include a synchronizer that can be locked to prevent unintentional movement of the grippers.

The application provides a bone-cutting guide for knee joint replacement surgery navigation and a use method thereof. The bone-cuting guide comprises: a navigation array for calibrating the position of a saw blade in a navigation system; a saw blade fixing seat for fixing a bone needle and mounting the saw blade; a first direction adjusting structure for adjusting the movement of the saw blade fixing seat; and a bone needle for being fixed in a bone needle hole of the saw blade fixing seat. Compared with the prior art, the application can realize accurate positioning of the angle and position of bone cutting by calibrating the position of the saw blade in the navigation system in time. Compared with the scheme in which a doctor uses a traditional surgical tool to perform bone cutting, the bone-cuting guide and the bone-cutting method have high position accuracy and depend less on the experience of the doctor, and compared with the scheme in which bone cutting is performed by cooperation of full intelligent navigation technology and a mechanical arm, the application does not need the participation of the mechanical arm, the operation steps are simple, and the surgical cost is reduced.

The present apparatus is a tool that holds and positions the tibial insert to improve the process of inserting the insert during a knee replacement operation. The apparatus comprises an arcuate convex shape that receives and holds the insert in place. The apparatus can be attached to a handle to provide greater ease of use, more reliable handling, and easier placement. The apparatus is made to have a pressure fit on the insert to firmly hold it in place, while still allowing it to be pulled off after the insert has been placed.

Systems and techniques can be provided to generate sensorized insights into the characteristics of a knee joint space during a knee replacement procedure. In some implementations, a sensor support body carrying one or more sensors can be used to measure and inform the clinician of the varus / valgus angles of the tibia and femur, allowing the clinician to adjust the surgical procedure to accommodate the measured angles. The clinician may simulate changes to the load balance across the knee joint in response to potential dimensional changes to the knee joint prior to actually surgically implementing the changes.

The application discloses a knee joint replacement surgery auxiliary positioning method, electronic equipment and a storage medium. The method calculates the distance between the end tool of the mechanical arm and the surgery planning plane, the first included angle between the end tool plane of the mechanical arm and the surgery planning plane, and the second included angle between the sawtooth of the end tool of the mechanical arm and the cutting direction of the surgery planning plane at the current time, respectively. When the end tool of the mechanical arm reaches the surgery planning plane, the end tool plane of the mechanical arm is parallel to the surgery planning plane, and the sawtooth of the end tool of the mechanical arm is directed to the cutting direction of the surgery planning plane, it is determined that the positioning of the mechanical arm at the current time is accurate, the movement of the mechanical arm is controlled to stop, and when the condition is not met, the pose of the mechanical arm at the next time is calculated, the movement of the mechanical arm is controlled according to the pose at the next time, the auxiliary positioning under any pose is realized, and the application scenarios are wider than those of the prior art.

The invention relates to the technical field of crossing of orthopedic medical instruments and biomedical engineering, and discloses a knee joint personalized prosthesis appearance and implantation orientation modulation method and system based on anatomy-motion-dynamics contradiction resolution, and the method comprises the steps: constructing an energy functional of a skeleton-ligament-prosthesis system based on a minimum potential energy principle; knee joint motion features and ligament elasticity features are analyzed to serve as drive and constraint of the personalized skeleton-ligament-prosthesis three-dimensional point cloud model, and prosthesis parameters are iteratively optimized to solve the contradiction between anatomy and kinematics; establishing a muscle-bone (muscle-bone) model of a personalized prosthesis-knee joint, performing inverse kinematics and finite element coupling simulation, and aiming at minimizing joint load, muscle energy consumption and contact stress, eliminating dynamic contradiction; in combination with intraoperative morphology, kinematics, soft tissue elasticity and other multi-source information, personalized prosthesis assembly scheme optimization and surgical planning optimization are achieved, and knee joint replacement is promoted to be converted from empirical surgery to analytic surgery.

A knee extraction system (100) including a slap hammer (110) that can couple with a variety of tools using a connector (120). The connector can allow the slap hammer to quickly be coupled and decoupled with different tools. The connector can include a spring- loaded component such that the tool can be easily connected and disconnected from the slap hammer. The slap hammer can include a handle for controlling the connected tool..

A knee replacement system, comprises: a tibial liner; a tibial tray with an upper surface and a lower surface, the lower surface comprising an external frustrum surface, wherein the upper surface of the tibial tray comprises a locking mechanism for engaging with the tibial liner; a coupling device, including a proximal morse taper located at an upper end that defines an internal frustrum space that engages with the external frustrum surface of the lower surface of the tibial tray, a morse taper wall that defines an external frustrum surface, and a distal end with a recess adapted to receive a fastener; a metaphyseal cone including an internal wall that defines an internal frustrum cavity for engaging with the external frustrum surface of the coupling device; and a tibial stem including a threaded end fastened to the distal end of the coupling device.

This invention relates to the field of medical device technology, providing a leg fixation bracket, fixation method, and medical device for knee replacement surgery. The bracket includes a clamping unit and a universal adjustment unit. The universal adjustment unit includes a first ball-head base fixed to the clamping unit, a second ball-head base for connecting a Kirschner wire guide, at least one adjusting rod connecting the two ball-head bases, and a locking mechanism for simultaneously locking the relative positions of the ball-head bases and the adjusting rod. The fixation method includes: fixing the clamping unit to the operating table side rail; releasing the locking mechanism and adjusting the posture to align the Kirschner wire guide with a predetermined insertion point. This invention achieves simultaneous multi-point locking through a single locking mechanism, making operation simple and locking reliable; the clamping unit can clamp bidirectionally to adapt to different operating table side rails; the overall purely mechanical structure requires no electrical components, ensuring high safety and effectively improving the stability and efficiency of knee replacement surgery.

1. Name of the product in this design: Knee joint prosthesis (single compartment). 2. Purpose of this design: for knee replacement. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

This invention belongs to the field of knee replacement surgery, specifically a pressure balance measuring device for knee replacement surgery, comprising a measuring device body; a base is provided below the measuring device body, and an adjustment and removal mechanism is provided between the measuring device body and the base; the adjustment and removal mechanism includes a fixing plate, which is located at the top of the base; through the design of the adjustment and removal mechanism, the size of the measuring device can be adjusted to accommodate different sizes for installation, solving the problem that existing devices do not have a component for slight height adjustment to accommodate different widths. Because the gaps between different patients' knee joints are different, when measuring, it is necessary to change the measuring device of the same size according to different gaps, resulting in frequent changes of measuring devices of different widths during installation, reducing work efficiency, and improving convenience.

A system of patient-matched and surgeon-specific single use surgical instruments designed for five different applications for knee replacement surgeries; primary total knee replacement, custom-made total knee replacement, revision total knee replacement, hinged total knee replacement and partial knee replacement. The system has patient-matched & surgeon-specific instruments are designed & prepared for each case based on patient's need and surgeon's demand. The system contains patient-matched set of blocks and guides, “On-Demand” surgeon-specific Instruments sets, conventional instruments sets, surgical planning software, 3D printing Software, 3D printers and sterilization unit. All the system components are manufactured by using 3D printing technologies.

This invention belongs to the field of medical device technology, specifically relating to an adjustable fixation and retraction device and its usage method for knee replacement surgery. It includes two supporting components, each comprising a guide rail with a horizontal bar slidably connected to it. A locking mechanism is located at one end of the horizontal bar near the guide rail, and a first vertical bar is fixedly mounted at the other end of the horizontal bar. A second vertical bar is fixedly mounted at the end of the guide rail away from the horizontal bar. Hoffman hooks are fixedly mounted at the lower ends of both the first and second vertical bars. These Hoffman hooks are used to hook the tibia and femur, respectively. This invention, by sliding the horizontal bar on the guide rail and using the locking mechanism, allows for stepless or graded adjustment of the distance between the first and second vertical bars on the same supporting component. The surgeon can quickly adjust the lateral span of the two Hoffman hooks according to the actual width of the patient's tibial plateau or femoral condyle, ensuring stable hooking at the optimal bony attachment point.

The application provides a knee joint replacement surgery planning method and device based on X-ray images, equipment and a storage medium. The method comprises the following steps: acquiring two orthogonal X-ray images of a knee joint; using a statistical shape model method to three-dimensionally reconstruct a three-dimensional model of a femur and a tibia of the knee joint from the two input X-ray images, and outputting key point positions; recommending a prosthesis model and a pose according to the three-dimensionally reconstructed model and the key point positions; confirming the inspection result by a doctor by using the spatial relationship constructed by the key points, and further adjusting the prosthesis pose according to needs, and finally outputting a knee joint prosthesis replacement surgery planning scheme. The method disclosed by the application uses the statistical shape model method to three-dimensionally reconstruct a two-dimensional X-ray image into a three-dimensional bone model and visualize the three-dimensional bone model, which is beneficial to the doctor to more intuitively observe the prosthesis positioning condition, so that the surgery scheme can be better outputted. Moreover, the method disclosed by the application has a relatively low cost and can cover more people.