46 results about "Tibia bone" patented technology

This invention relates to a multifunctional rehabilitation robot for knee osteoarthritis based on a rope-driven four-bar linkage structure, comprising a shell, a main control drive module, a knee joint wearable module, a knee joint connection and transmission module, and a detachable load-free module. The main control drive module is housed within the backpack shell. The knee joint wearable module includes a femoral wearable unit and a tibial wearable unit, connected via the knee joint connection and transmission module. The knee joint connection and transmission module includes a four-bar linkage structure and a rope drive assembly, which drives the four-bar linkage structure to achieve knee flexion and extension. The detachable load-free module includes a hip support unit and a leg support unit; the hip support unit is connected to the femoral wearable unit, and the leg support unit is connected to the tibial wearable unit. Compared with existing technologies, this invention effectively addresses the rehabilitation needs of patients with knee osteoarthritis and helps patients with varying degrees of varus / valgus aberration correction achieve assisted walking, load-free operation, rehabilitation training, and varus / valgus correction.

This invention provides a fixation device and assembly method for pericondylar fractures of the knee joint prosthesis. The knee joint prosthesis includes a femoral condyle, a tibial plateau, and a tibial pad. The femoral condyle includes an anterior condyle, two posterior condyles, and an intercondylar fossa. A fixation device is installed in the intercondylar fossa, comprising an intramedullary fixation pin and a connecting fixation block. The connecting fixation block is installed within the intercondylar fossa and engages with the force-applying end of the intramedullary fixation pin. The connecting fixation block includes a main body with a top surface facing the tibial pad and a bottom surface opposite the top surface. The bottom surface extends away from the top surface to form a protrusion, and a through hole is formed within the protrusion, which is used to accommodate and fix the force-applying end of the intramedullary fixation pin. This invention embeds the entire connecting fixation block within the intercondylar fossa, fully utilizing the existing intercondylar fossa space of the PS-type prosthesis to establish a precise channel for the intramedullary fixation pin, thereby fixing the pericondylar fracture through structural fit.

This invention provides an experimental device for friction and wear testing of an artificial knee joint, belonging to the field of material friction and wear technology. It includes a lifting module, with a femoral clamping module at its top. The femoral clamping module contains a polyurethane elastomer sealed chamber, and a tibial clamping module is connected below this chamber. An intelligent temperature-controlled circulating hydraulic pump is located on one side of the polyurethane elastomer sealed chamber. This invention achieves reciprocating motion through a reversing valve control. Combined with sub-millimeter precision adjustment of the hydraulic actuator and differentiated installation positions, it realizes high-precision flexion, extension, and torsional movements of the artificial knee joint. A stable base load is provided by a central hydraulic loading module, while the unnecessary torque from the dual electromagnetic loading modules cancels each other out. Simultaneously, instantaneous impact force is superimposed on the stable hydraulic load through instantaneous power switching, enriching the loading methods of the experimental device for friction and wear testing of an artificial knee joint.

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.

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.

A method for planning a surgery to a knee joint includes recording a target HKA for a patient and, based on an evaluation of wear of the knee joint, setting an initial resection plan including setting planned femoral resections and setting at least one planned tibial resection. The method includes determining a planned HKA of the patient based on the initial resection plan. The planned HKA is a function of a femoral coronal alignment provided by the planned femoral resections and a tibial coronal alignment of the patient provided by the planned at least one tibial resection. The method further includes selectively adjusting the initial resection plan based on the target HKA and the planned HKA by adjusting the planned tibial coronal alignment and / or the planned femoral coronal alignment to provide an adjusted resection plan with an adjusted planned HKA that is within a threshold of the target HKA.

Embodiments of the present application provide a femoral condyle prosthesis and a femoral prosthesis with the femoral condyle prosthesis. The femoral condyle prosthesis comprises a femoral condyle, which comprises a medial condyle and a lateral condyle for corresponding cooperation with a tibia, the medial condyle and the lateral condyle are connected to each other to form an anterior condylar surface, and a middle of the anterior condylar surface is recessed to form a trochlear groove for accommodating a patella, a line connecting the lowest points of the trochlear groove is a prosthesis patella trajectory line, and the prosthesis patella trajectory line is located outside a midpoint of an intercondylar notch at a position near the lowest point of the trochlear groove of the femoral condyle. Therefore, the femoral condyle prosthesis of the embodiments of the present application can greatly reduce the problem of knee pain in the large flexion movement of the knee joint.

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 relates to a shin guard (1) comprising a sleeve (2) made of extensible fabric holding a cushioning part (3) which is fixed to the sleeve (2) and configured to be placed in front of all or part of the tibia of a user when the shin guard (1) is in use, the cushioning part (3) comprising a one-piece shell (6) formed of a layer of a cushioning material, the layer of cushioning material being constituted by a paving of individual hexagonal cells (7), characterized in that each hexagonal cell (7) of the shell (6) is connected to its neighbours.

The present application belongs to the field of foot and ankle surgical implant devices and biomedical material surface engineering technology, and discloses a tibial component of ankle prosthesis with a composite coating, which comprises: a metal substrate which is a bionic trabecular three-dimensional interconnected porous titanium alloy structure, the porosity is 50-80%, the average pore size is 400-900 mu m, and the connected porosity is greater than or equal to 85%, so that the elastic modulus is controlled in the range of 5-20 GPa, and is matched with the cancellous bone of the tibia; a composite functional coating is in situ grown on the surface of the metal substrate, and the composite functional coating comprises a bioactive layer and a functional ion doped layer. The tibial component of the present application comprises a porous titanium alloy metal substrate and a composite functional coating constructed in situ on the surface thereof, the porous titanium alloy substrate is designed in a bionic trabecular structure to form a three-dimensional interconnected porous structure, so as to provide an elastic modulus matched with the cancellous bone of the tibia and promote the growth of bone tissue.

After the knee prosthesis using this tibial platform is implanted in the human body, a gap appears between the femoral condyle and the tibial pad due to long-term wear. The compressed elastic component begins to push the first push block to move, thereby lifting the first ascending part located on the upper inclined surface of the first push block. The first ascending part drives the tibial pad to rise. The first push block, pushed by the elastic component, pushes the second push block to move inward along the track. The second push block then pushes the support rod of the second ascending part to move, and the lifted second fixing block further drives the tibial pad to rise. After the tibial pad has been lifted, the pawl in the blocking device engages with the serrations on the second push block, thereby limiting the push block and preventing it from retracting, thus preventing the ascending part from descending, and completing the lifting of the tibial pad. This effectively solves the problem in the prior art where the gap between the femoral condyle and the pad is different after wear on the inner and outer sides of the femoral condyle, leading to accelerated wear.

This invention provides a bone-setting assembly, comprising: a tibial connector; a talus connector; an angle adjustment component connected between the tibial connector and the talus connector, the angle adjustment component including a swing block connected to one of the tibial connector and the talus connector, the swing block being swingably disposed on the other of the tibial connector and the talus connector, the swing block being provided with multiple locking grooves; and a locking component having a locked position and an unlocked position. When the locking component is in the locked position, it engages with one of the multiple locking grooves to fix the angle between the tibial connector and the talus connector; when the locking component is in the unlocked position, it separates from all the locking grooves to make the angle between the tibial connector and the talus connector adjustable. The technical solution of this application effectively solves the problems of poor fit and poor implantation stability of ankle joint bone plates in related technologies.

ORTHOPEDIC LEG ALIGNMENT SYSTEM AND METHOD Abstract An orthopedic measurement system is disclosed to measure leg alignment. The measurement system includes a tri-axial gyroscope con­ figured to measure movement of a leg. The gyroscope is coupled to a tibia of the leg. For example, the gyroscope can be placed in an insert or tibial pros - thetic component that couples to the tibia. The gyroscope is used to measure alignment relative to the mechanical axis of the leg. The leg alignment measurement is performed by putting the leg through a first leg movement and a second leg movement. The gyroscope outputs angular velocities on the axes the sensor is rotated about. The gyroscope is coupled to a computer that calculates the alignment of the leg relative to the mechanical axis from the gyro - scope measurement data. ORTHOPEDIC LEG ALIGNMENT SYSTEM AND METHOD Abstract An orthopedic measurement system is disclosed to measure leg alignment. The measurement system includes a tri-axial gyroscope con- figured to measure movement of a leg. The gyroscope is coupled to a tibia of the leg. For example, the gyroscope can be placed in an insert or tibial pros - thetic component that couples to the tibia. The gyroscope is used to measure alignment relative to the mechanical axis of the leg. The leg alignment measurement is performed by putting the leg through a first leg movement and a second leg movement. The gyroscope outputs angular velocities on the axes the sensor is rotated about. The gyroscope is coupled to a computer that calculates the alignment of the leg relative to the mechanical axis from the gyro - scope measurement data.20 25 20 12 68 21 F eb 2 02 5 O R T H O P E D I C L E G A L I G N M E N T S Y S T E M A N D M E T H O D A b s t r a c t 2 0 2 5 2 0 1 2 6 8 2 1 F e b 2 0 2 5

A system including a knee ranging tool: including a base configured to locate on a resected proximal face of a tibia in a knee of a patient; defining a tibial reference surface configured to run against a femoral surface of an artificial femoral component, installed on a distal face of a femur of the patient, during articulation of the knee of patient; including a set of stages interposed between the base and the tibial reference surface, configured to locate the tibial reference surface relative to the base, and compliant to medial-lateral translation, anteroposterior translation, and transverse rotation; and configured to indicate a medial-lateral translation offset, an anteroposterior translation offset, and a transverse rotation offset corresponding to a position of the tibial reference surface, relative to the base, that yields elastic deformation of ligaments in the knee over a range of motion of the knee.

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).

The present invention relates to the technical field of medical rehabilitation aids and provides a support for posterior cruciate ligament injuries of the knee joint. [Solution] The upper connecting brackets consist of two brackets arranged symmetrically front to back, and two lower connecting brackets arranged symmetrically front to back. A support shaft is fixed to the right end of the upper connecting bracket, and the left end of the lower connecting bracket is rotatably fitted to the support shaft via a bearing. A connecting part is provided in the connecting assembly, and a fixing part is fixed to the lower end of the connecting part. A balloon is provided between the connecting parts on both the front and rear sides, and both the front and rear ends of the balloon are fixed to the connecting parts on both the front and rear sides, respectively. By providing a joint-type mounting structure and rigidly connecting both the upper and lower parts of the mounting structure, an interlocking support structure is configured that can move in conjunction with the movement of the user's knee joint. Therefore, when the user extends their knee joint, the tibia of the user can be supported, and fatigue of the posterior cruciate ligament can be reduced.

The present application relates to a kind of ankle joint prosthesis and ankle joint prosthesis system, the ankle joint prosthesis includes: tibial prosthesis, sliding core prosthesis and talus prosthesis, the sliding core prosthesis is arranged between the tibial prosthesis and the talus prosthesis, the sliding core prosthesis has concave spherical surface, the talus prosthesis has convex spherical surface, the convex spherical surface and the concave spherical surface sliding fit, in the projection parallel to the sagittal plane of the ankle joint prosthesis, the midpoint of the line of the front end of the tibial prosthesis and the rear end of the tibial prosthesis is P1, in the front-rear direction of the ankle joint prosthesis, the first coronal plane F1 passing through the center of the convex spherical surface has preset interval with P1, and the P1 is located in the rear side of the first coronal plane F1.The structure of the ankle joint prosthesis of the present application is stable after implantation, stress is uniform, can slow down prosthesis wear, is beneficial to patient postoperative recovery.

This application relates to the field of joint modeling technology, and discloses a method for assessing the risk of knee motion injury based on viscoelastic response finite element analysis. The method includes: acquiring magnetic resonance imaging data of the knee joint; performing grayscale thresholding to segment and reconstruct a three-dimensional structural model of the knee joint from sagittal and coronal images; performing surface smoothing to obtain a three-dimensional geometric model; setting bones in the three-dimensional geometric model as homogeneous, isotropic linear elastic bodies, cruciate ligaments and menisci as isotropic viscoelastic materials, and quadriceps tendons and patellar ligaments as stiff linear spring elements; meshing the three-dimensional geometric model; setting bone-to-bone and meniscus-to-femur contact as frictionless hard contact; setting the six degrees of freedom variation of the lower surfaces of the tibia and fibula to zero to establish a finite element model of the knee joint; performing knee flexion simulations at different angles and durations and detecting the viscoelastic response of the anterior cruciate ligament and meniscus; evaluating the influence of knee flexion angle and duration on the mechanical load of the knee joint soft tissues; and thus assessing the risk of injury. This application also discloses a knee sports injury risk assessment system based on viscoelastic response finite element analysis that implements the aforementioned method. This application can provide methods and basis for assessing the potential risk of knee joint injury during sports and for targeted treatment after injury.

A knee and shin protection system includes an inner shin plate and an outer shell. The inner shin plate is configured to be secured to a user's lower leg via a strap. The outer shell has a lower shell portion attached to the inner shin plate and an upper shell portion pivotally connected to the lower shell portion. This pivotal connection allows the upper shell portion to remain aligned with the knee as the user's leg bends. In an embodiment, the inner shin plate can be selectively tilted relative to the outer shell by using different attachment points between the components. This feature allows a single manufactured system to be configured for either a left or right leg orientation, enhancing ergonomic fit and manufacturing efficiency.

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.

The utility model discloses a kind of intraoperative adjustable knee joint surgery guiding device, it is related to medical instrument technical field, and it include: tibia guide plate, femur front guide plate, femur distal guide plate, four-in-one rotary adjusting plate, metal handle, four-in-one osteotomy plate, wherein four-in-one osteotomy plate is fixed on femur by screw thread nail hole, and bone cutting is carried out to femur by four-in-one osteotomy slot on four-in-one osteotomy plate of swing saw;The guiding device can realize femur valgus angle intraoperative real-time adjustment, realize femur external rotation angle intraoperative real-time adjustment, and more realize flexion-extension gap balance based on ligament judgment basis of operator.

Methods and devices are disclosed for soft tissue balancing of a knee joint during an arthroplasty procedure that include balancing the knee joint at or near mid-flexion, while maintaining the rotational position of the femur with respect to the tibia that replicates proper kinematic placement of these bones. Also disclosed are methods and devices for soft tissue balancing of a knee joint during an arthroplasty procedure that include balancing the knee joint at or near mid-flexion using one or more expansion devices that are not actively requiring monitoring and / or recording of forces applied by the bodily tissues, but instead uses incremental changes in actual length / height of the expansion device to determine whether the joint is properly tensioned or too lax.

The present application provides a kind of ankle joint prosthesis, comprising: tibial prosthesis;Talus prosthesis, with tibial prosthesis sliding fit, talus prosthesis includes talus body and buffer pad, buffer pad is in contact with tibial prosthesis, talus body is provided with multiple hole parts to the side of tibial prosthesis, multiple hole parts are arranged in array, buffer pad includes pad body and multiple plug-in parts, multiple plug-in parts and pad body are connected, multiple plug-in parts and multiple hole parts are set up one by one, plug-in part is inserted into corresponding hole part, pad body and multiple plug-in parts are configured to be able to produce elastic deformation under pressure state.The technical scheme of the present application effectively solves the problem that the ankle joint prosthesis in the related art is difficult to realize the mechanical environment of physiological state.

This application relates to a simulation training method for total knee arthroplasty prosthesis positioning and gap balancing, belonging to the field of simulation training technology. To provide a standardized and repeatable workflow for individualized planning of total knee arthroplasty surgery, this application provides a simulation training method for total knee arthroplasty prosthesis positioning and gap balancing. This method includes determining the amount of osteotomy on the posteromedial femoral condyle based on the thickness of the femoral prosthesis's posterior condyle; determining the rotational alignment parameters of the femoral prosthesis based on a femoral trochlea model to obtain a patellar trajectory that meets the requirements; determining the placement of the tibial prosthesis on the tibia with the knee joint model in a flexed state; and determining the placement of the femoral prosthesis on the femur with the knee joint model in an extended state. This method enables individualized planning of total knee arthroplasty surgery, precise prosthesis positioning, flexion-extension gap balancing, and standardized training of the surgical procedure, improving surgical accuracy and postoperative outcomes.

A position adjustment device having a tool holder is locked to at least two pins projecting from respective anterior facing locations near a distal end of a tibia of a patient. The position adjustment device is adjusted. The position adjustment device is locked with the tool holder at first coordinates in the proximal-distal and medial-lateral directions. The distal end of the tibia is resectioned with a tool positioned on the tool holder, while the tool holder is in the first coordinates in the proximal-distal and medial-lateral directions. The tool is removed from the tool holder. A tibia trial is placed on the resectioned tibia using the tool holder, while the tool holder is in the first coordinates in the proximal-distal and medial-lateral directions. The tibia trial has a size and shape of a tibial tray of an ankle replacement system.

This invention consists of reproducing the main movements of the natural knee: Flexion / Extension (F / E) and the Anterior / Posterior (A / P) gliding movement under a static load while using servo drives, servo motors, sensors, a linear displacement table based on ball screws, a data acquisition card, a microcomputer, a communication bus and control software. This test bench makes it possible to quantify the friction and wear of a knee prosthesis in order to discover a new material for the tibial insert for the manufacture of knee prostheses allowing for a satisfactory lifespan and postponing the second surgical intervention.

The utility model discloses a lower limbs structure of dummy for blasting test, including shank assembly, the shank assembly is including with the knee joint connecting piece that links with knee assembly, with the ankle joint connecting piece that links with foot assembly and is located between the tibial skeleton of knee joint connecting piece and ankle joint connecting piece, be equipped with shank sensor group for gathering shank stress or / and movement data on tibial skeleton skeleton, tibial skeleton vertical arrangement, and the first pivot center of knee joint connecting piece with second pivot center of ankle joint connecting piece all are located on the line of coincidence with the central axis of tibial skeleton. The lower limbs structure of the utility model ensures that the vertical impact force in the blasting test can be along the central axis of tibial skeleton skeleton high -efficient, directly transmit, and shank sensor group can accurately capture shank axial stress data, and at the same time meet the special working condition requirement that lower limbs keep the upright posture in the blasting test.

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 knee orthosis of the present invention includes a femoral cuff configured to engage with the upper leg of the wearer, a tibial cuff configured to engage with the lower leg of the wearer, and a hinge that pivotably connects the femoral cuff to the tibial cuff. The hinge has a femoral portion and a tibial portion, which engage with each other and include a shell configured to pivot relative to each other about a center of rotation. One shell includes an engagement surface facing a complementary engagement surface on the other shell. The engagement surface and the complementary engagement surface each have a shape corresponding to a part of an ellipsoid defined by a major axis extending in the sagittal plane, a minor axis perpendicular to the major axis, and the length of the ellipsoid along the major axis being longer than the length along the minor axis, and rotation around the major axis.