163 results about "Knee replacement" patented technology

Knee replacement prosthesis are provided, comprising a plurality of sensors and at least one of a femoral component, a patellar prosthesis and a tibial component.

The embodiment of the invention is suitable for the technical field of medical treatment, and provides a preoperative planning method and medical device.The method comprises the steps that according to a first three-dimensional model corresponding to a target skeleton, the feature axis of the target skeleton and the feature point of the target skeleton are determined; according to a preset space coordinate system and the feature axis of the target skeleton, adjusting the pose of the target skeleton of the first three-dimensional model to obtain a second three-dimensional model; and determining a target osteotomy direction and a target osteotomy position in the second three-dimensional model according to the feature points, the feature axis and the osteotomy planning parameters. By adopting the method, the time required by the knee joint replacement operation can be shortened.

A method for optimizing a knee arthroplasty surgical procedure includes receiving pre-operative data comprising (i) anatomical measurements of the patient, (ii) soft tissue measurements of the patient's anatomy, and (iii) implant parameters identifying an implant to be used in the knee arthroplasty surgical procedure. An equation set is selected from a plurality of pre-generated equation sets based on the pre-operative data. During the knee arthroplasty surgical procedure, patient-specific kinetic and kinematic response values are generated and displayed using an optimization process. The optimization process includes collecting intraoperative data from one or more surgical tools of a computer-assisted surgical system, and using the intraoperative data and the pre-operative data to solve the equation set, thereby yielding the patient-specific kinetic and kinematic response values. A visualization is then provided of the patient-specific kinetic and kinematic response values on the displays.

Knee replacement prosthesis are provided, comprising a plurality of sensors and at least one of a femoral component, a patellar prosthesis and a tibial component.

The present invention relates to a system and method for load and gap balancing in knee replacement surgery. The system incorporates sensor devices, such as load cells, pressure, ultrasound or optical, to accurately measure gaps and ligament tensions within the knee joint during surgery. Additionally, a tensioner device, which can be a manual spreader, a spring-loaded mechanism, or a motorized linear actuator, is employed to tension the medial and lateral collateral ligaments, as well as patella tendon, based on the measured data. These real-time measurements are transmitted to a computer or robotic surgery system, which provides real-time visualization of the data and assists the surgeon in determining the appropriate gap and ligament tension for each individual patient. Using soft tissue analysis, the real-time sensor data can be displayed on a computer recommending appropriate gap and ligament tension, implant size and shape, and individualized knee alignment based on optimal outcome.

The invention discloses a control method and device of a surgical robot, a storage medium and electronic equipment. The method comprises the following steps: determining a plurality of simulated osteotomy surfaces of a target object according to a preoperative plan of knee joint replacement; under each simulated osteotomy surface, calculating a working space of the surgical robot to obtain a plurality of first working spaces; and determining a target working space of the surgical robot according to the plurality of first working spaces, and controlling the surgical robot to execute actions based on the target working space. By means of the method and device, the problem that in the prior art, due to kinematics constraint, an under-degree-of-freedom surgical robot cannot be adjusted to all necessary operation postures, and the accuracy of surgical robot control is low is solved.

An intraoperative surgical system can be used for knee arthroplasty. The system may include a sensor support body defining a platform, a force sensor positioned on the platform, and a sensor cover positioned over the platform of the sensor support body thereby sandwiching the force sensor between the platform and the sensor cover. The sensor cover can be detachably coupled to the sensor support body. The platform, the force sensor, and the sensor cover can collectively define a joint insertion block configured to be inserted into a tibiofemoral joint for measuring a force between a tibia and a femur defining the tibiofemoral joint.

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.

Disclosed is an innovation in the manner of surgically exposing the knee during total or partial knee arthroplasty, because currently, and as it has always been the case, the conventional surgical approach for the knee used the anterior route but also the medial route, where it was necessary to sever the whole tissue attachment of the inner bone border thereof, said tissue attachment comprising the capsule (envelope), the medial patellofemoral ligament and the tendon of the vastus medialis oblique (muscle) of the quadriceps. The present invention relates in particular to operating equipment intended to facilitate and / or implement a new and innovative surgical approach.

An intraoperative surgical system for knee arthroplasty may be configured and / or reconfigurable to allow the surgical system to be inserted into different sized joint spaces during a surgical procedure. For example, the surgical system may include a sensor support body defining a platform, a force sensor, and a plurality of sensor covers each being configured to be detachably attached to the sensor support body. Each of the sensor covers can vary from each other in at least one characteristic. A selected one of the sensor covers can be placed over the platform, sandwiching the force sensor between the platform and sensor cover, to define a joint insertion block configured to be inserted into a tibiofemoral joint for measuring a force between a tibia and a femur defining the tibiofemoral joint.

The utility model belongs to the technical field of medical instruments, and particularly relates to a knee joint replacement operation position adjustable device which comprises a base, moving wheels and a fixing rod are arranged on the base, an adjusting rod is arranged at the outer end of the fixing rod in a sleeved mode, a through hole is formed in the adjusting rod, and a second fastening bolt penetrates through the through hole to be connected with the fixing rod in a screwed mode. The top end of the adjusting rod is connected with a clamping groove formed in the top seat in a clamped mode, the top seat is further provided with a screw hole and a moving groove, a third fastening bolt is connected with the screw hole in a screwed mode, a screw rod is horizontally arranged in the moving groove, one end of the screw rod penetrates through the moving seat to be connected with a rotating handle, and threads of the inner wall of the moving seat are matched with threads of the outer wall of the screw rod. A supporting seat is rotationally connected to the moving seat, an adjusting plate is inserted into the top seat and connected with a baffle, the affected limb of a patient can be fixed through the device, the labor intensity of medical workers can be reduced, and the stability of body position keeping can be guaranteed.

1. Name of the product of this design: Femoral osteotomy guide for knee replacement. 2. Purpose of the product of this design: For femoral osteotomy. 3. Key design point of the product of this design: Shape. 4. Picture or photo that best illustrates the key design point: Main view.

The invention provides a risk prediction method for intermuscular venous thrombosis of a knee arthroplasty patient. The method comprises the following steps: acquiring potential risk factors of intermuscular venous thrombosis of a research object; carrying out single-factor analysis on the potential risk factors, and screening single-factor variables which are strongly related to the formation of the intermuscular venous thrombosis of the research object; analyzing Plt in the single factor; 0.2 single factor variables are incorporated into multivariable logistic regression analysis, independent risk variables, significantly related to intermuscular venous thrombosis, of a research object are screened, and a risk prediction column graph model of intermuscular venous thrombosis of the research object is constructed; and performing distinction degree, calibration degree and clinical adaptability test on the column graph model. By constructing the inter-muscular venous thrombosis column diagram risk prediction model of the knee joint replacement patient, the occurrence risk of inter-muscular venous thrombosis of the knee joint replacement patient can be specifically evaluated and predicted.

A method to facilitate a robotic total knee arthroplasty includes performing a plurality of femoral cuts on a femur, the performing the plurality of femoral cuts including performing a distal femoral cut of the plurality of femoral cuts, performing an anterior femoral cut of the plurality of femoral cuts, performing an anterior chamfer cut of the plurality of femoral cuts after the performing the distal femoral cut and the performing the anterior femoral cut, and performing a posterior femoral cut of the plurality of femoral cuts after performing all other femoral cuts of the plurality of femoral cuts. The method further includes performing at least one tibial cut on a tibia after the performing the plurality of femoral cuts on the femur.

A total knee replacement implant having an anatomically representative femoral component that is based on an average knee geometry model determined from scans of multiple people. The implant can be customized for a given patient by scaling the average knee geometry according to one or more measurements (e.g. AP and ML) of the patient's knee. The implant can be formed by 3D printing or any suitable fabrication technique.

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.

A method of positioning posterior resection guides in a three-dimensional coordinate system using robotic arms to perform partial knee arthroplasties comprises connecting a first tracking device for a surgical tracking system of the robotic arm to a femur, connecting a second tracking device for the surgical tracking system of the robotic arm to a tibia, manually positioning the tibia relative to the femur to a desired orientation to perform a posterior resection, manually determining a position for the posterior resection guide to perform the posterior resection, digitizing a reference point for the posterior resection guide in the three-dimensional coordinate system for a location of a feature of the posterior resection guide, moving the posterior resection guide to the location in the three-dimensional coordinate system with the robotic arm, and resecting a posterior portion of a condyle of the femur using the posterior resection guide to guide a cutting instrument.

According to one example, a bearing component for a knee arthroplasty is disclosed. The bearing component can optionally comprise any one or combination of: a medial compartment having an medial articular surface with a medial articular track and having a first thickness as measured at the medial articular track between the medial articular surface a medial distal surface; and a lateral compartment having a lateral articular surface with a lateral articular track and having a second thickness as measured at the lateral articular track between the lateral articular surface a lateral distal surface; wherein the medial articular surface at the medial articular track and the lateral articular surface at the lateral articular track each have an inclination so as to form an acute angle with respect to a resected proximal surface of a tibia.

An orthopedic instrument (10) for a knee arthroplasty, the instrument including: a base (12) having one or more paddles (36) configured to seat against and reference one or both of a medial condyle and a lateral condyle of a femur; a body (14) linked to the base for rotation relative thereto, wherein the body includes a recess and slot therein and a first indicia (24) along a first face of the body adjacent the slot; a post (20) received in the recess and moveable relative to the body, wherein the post has a second indicia (28) used with the first indicia to determine a posterior size of the femur; and an adjustment mechanism (18) having a third indicia (30) to indicate a rotation of the femur, wherein the adjustment mechanism is configured to rotate the body relative to the base to a desired orientation based upon the rotation of the femur.

The present invention discloses a reflective array fixation device for robotic knee replacement surgery, belonging to the field of medical technology. The device comprises a claw mechanism and a fixation mechanism; the fixation mechanism comprises a fixation box, a fixation block, and a locking handle; the fixation box is provided with at least two Kirschner wire holes extending through its front and rear walls; the top of the fixation box is provided with a threaded hole; the fixation block is located inside the fixation box and can move up and down; the middle portion of the locking handle is a threaded section, the end of which is provided with a circular constraint block; the top of the fixation block is provided with a shrinking groove; the threaded section of the locking handle is matingly connected to the threaded hole of the fixation box, and the circular constraint block at the end of the locking handle is located in the shrinking groove and can rotate freely within the shrinking groove. The present invention achieves excellent fixation of the reflective array through simple coordination.

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.

A system for balancing a knee of a patient includes a force measurement device configured to measure forces between a femoral bone and a tibia bone as a force is applied to the knee and a computing system configured to determine a separation distance between a point or region associated with the femur and a point or region associated with tibia based on force information from the force measurement device. The force measurement device may include at least one paddle configured for placement between the femur and tibia and including at least one force sensing element for sensing forces associated with the femur or tibia. The computing system may be configured to normalize a measured force and identify the separation distance based on the normalized force, wherein the identified separation distance is substantially the same over a range of forces measured by the force measurement device.

The invention provides a flexible pressure-adjustable knee joint distraction device, and belongs to the technical field of knee joint adjuvant therapy. Comprising a handle, an inner cavity is formed in the handle, a flexible distraction mechanism is fixedly installed at one end of the handle, and a rigid distraction mechanism is fixedly installed on the other side of the handle. The flexible distraction mechanism gently and stably distraction the knee joint by means of the flexible water supply assembly and depending on water pressure, can fit the shape of the bone and can accurately regulate and control pressure, the rigid distraction mechanism is started when the flexible mechanism fails, reliable rigid distraction is achieved through an ingenious clamping structure and a transmission assembly, the pressure is accurately fed back through matching with a tension sensor, and the flexible distraction mechanism is suitable for the flexible mechanism. The two parts supplement each other, so that the device can flexibly meet the requirements of different patients, operation stages and complex distraction, a comprehensive and reliable distraction scheme is provided for operations such as knee joint replacement, and the safety and success rate of the operations are effectively improved.

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 present invention discloses a method for verifying osteotomy accuracy during knee replacement surgery, comprising: S1, obtaining a preoperative point cloud of a patient and marking anatomical bony landmarks therein; S2, determining whether it is a non-imaging surgical plan; if so, obtaining a planned osteotomy plane and a planned osteotomy amount, and simultaneously registering the patient's preoperative point cloud with the intraoperative point cloud; otherwise, obtaining a planned osteotomy plane and a planned osteotomy amount; S3, obtaining a postoperative point cloud of the patient after osteotomy, identifying the actual osteotomy plane therein, and then calculating the actual osteotomy amount, while removing points on the identified actual osteotomy plane; S4, registering the patient's preoperative point cloud with the postoperative point cloud after removing the points on the actual osteotomy plane; S5, based on the registration in S4, transforming the actual osteotomy plane obtained in S3 and the planned osteotomy plane obtained in S2 to the same reference, and calculating the osteotomy plane error and the osteotomy amount error accordingly. The present invention can verify osteotomy accuracy under optical navigation.

Disclosed herein is an angled wall femoral component (500) of a cam-post knee arthroplasty system for posterior cruciate ligament (PCL) replacement total knee arthroplasty (TKA) or revision TKA (rTKA) procedures, such as cruciate ligament (CS), bilateral cruciate ligament (BCS), or posterior stabilization (PS) procedures. The angled wall femoral component may include a femoral box (502) configured to receive a tibial post (110) of a corresponding tibial component (100). The anterior wall (508) of the femoral box is angled anteriorly and may include an anterior cam (561). The anterior wall is angled anteriorly to allow clearance between the anterior side of the tibial post and the anterior wall, while allowing a movable engagement between the tibial post and the anterior cam during knee flexion and extension, to which the femoral component is implanted.

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.

The present invention provides a double sliding field tibial platform base and gasket system, including a platform base and a gasket, wherein the platform base includes an upper platform and a lower keel, wherein two high dividing ridges are arranged in the middle of the platform from front to back, and the platform is divided into three parts: a central groove, an inner sliding field, and an outer sliding field, and the gasket is divided into a central gasket, an inner gasket, and an outer gasket, which are matched with the three parts of the platform, and the above structure is matched with an artificial femoral prosthesis to form an artificial joint interface in which both the inner chamber and the outer chamber are slidable and rotatable. The system can form a joint interface that can move flexibly in the inner and outer joint compartments after knee replacement, while retaining the front-back stability, dispersing and reducing the wear rate of the inner and outer compartments of the knee joint, improving the movement characteristics of the knee joint, improving the surgical effect, and extending the service life of the prosthesis.

Devices, systems, and methods for controlling the gap height of posterior resection in partial knee replacement surgery may include: A) using robotic surgical planning software to adjust the extension gap to fit the flexion gap to manually position a manual posterior cutting guide; B) using a surgical navigation system to determine the femoral rotation axis to correctly manually position the manual posterior cutting guide; C1) using shims to adjust the position of the manual posterior cutting guide; C2) using robotically guided femoral and tibial partial cutting guide blocks to position the robotically configured posterior cutting guide relative to the distal end of the femur; and D) using robotically guided femoral and tibial partial cutting guide blocks to guide the pin holes for the robotically configured posterior cutting guide relative to the distal end of the femur.

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.