569 results about "Tibia bone" patented technology

The invention provides an artificial intelligence auxiliary diagnosis method and system for a knee joint, and the method comprises the steps: synchronously collecting a multi-angle dynamic X-ray image and six-degree-of-freedom contact force distribution data in an articular cavity, dynamically tracking a patella sliding track, and generating a mechanical phase track; a personalized knee joint model is constructed in combination with the biological parameters of the lower limbs of the patient, the mechanical phase trajectory and the contact force data vector are superposed to generate a dynamic mechanical fingerprint, and then the dynamic mechanical fingerprint is mapped into a biomechanical attribute map; electromyographic signal time-frequency characteristics and tibia rotation angles in the movement process are collected, an electromyographic activation mode is constructed, and the electromyographic activation mode and a biomechanical attribute map are subjected to characteristic fusion to form a joint dynamics comprehensive contour; analyzing a stress wave conduction path by using a joint anomaly dynamic propagation model to identify a compensatory injury mode; a diagnosis map is generated according to the recognition result, a preset biomechanical constraint condition is matched to correct the diagnosis map, and an individualized rehabilitation strategy is formulated. The treatment effect is improved, and the recovery speed of a patient is increased.

The invention provides a tibial plateau assembly and a knee joint prosthesis with the tibial plateau assembly.The tibial plateau assembly comprises a first driving part arranged on a tibial plateau and hinged to a tibial pad, the first driving part has a first driving state and a first static state, and when the first driving part is in the first driving state, the first driving part drives the tibial pad to rotate; the first driving piece can stretch out and draw back in the direction from the tibia platform to the tibia gasket; the second driving piece and the first driving piece are arranged on the tibia platform in a spaced mode, the second driving piece is hinged to the tibia gasket, the second driving piece has a second driving state and a second static state, and when the second driving piece is in the second driving state, the second driving piece can stretch out and draw back in the direction from the tibia platform to the tibia gasket; the first driving part and the second driving part are matched to adjust the distance and / or the inclination angle between the tibia gasket and the tibia platform. According to the technical scheme, the problem that the relative position between the tibia gasket and the tibia platform cannot be adjusted in the prior art is effectively solved.

The invention relates to the technical field of joint prostheses, in particular to an ankle joint prosthesis implantation system based on zirconium-niobium alloy, which comprises a tibia prosthesis (10), a talus prosthesis (30) and a liner (20), the tibia prosthesis (10) and the talus prosthesis (30) are both made of zirconium-niobium alloy material and are integrally formed by 3D printing, the tibia prosthesis (10) comprises a tibia body (101), and the liner (20) is arranged on the tibia body (101). The first bone contact layer (100) is integrally formed on the tibia body (101), and the first bone contact layer (100) is of a porous structure of which the pore diameter is gradually reduced from outside to inside; the talus prosthesis (30) comprises a talus body (301) and a second bone contact layer (300) integrally formed on the talus body (301), and the second bone contact layer (300) is of a porous structure with the aperture gradually reduced from outside to inside.

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

The invention provides an osteotomy path adjusting system in robot-assisted knee arthroplasty, and belongs to the technical field of knee joint detection. The system comprises a multi-modal data acquisition unit which comprises a knee joint pressure measuring gasket, an optical acquisition module and a kinematics data acquisition module, the knee joint pressure measuring gasket is used for acquiring knee joint pressure signals in an operation, and the optical acquisition module is used for acquiring relative poses of a femur and a tibia; the kinematics data acquisition module is used for acquiring kinematics data of the mechanical arm; the main control calculation unit comprises a data fusion module and a dynamic compensation module, and the data fusion module is used for constructing a synchronous spatio-temporal data set; and the dynamic compensation module is used for outputting a compensation instruction to the mechanical arm to adjust an osteotomy path based on the synchronous spatio-temporal data set, the preoperative predicted pressure prediction matrix and the soft tissue stiffness matrix. The pressure change in the operation can be responded in real time, the operation precision of the knee arthroplasty is improved, and the dependence on the experience of doctors can be reduced.

The invention provides a knee joint prosthesis tibial plateau capable of enhancing fixation and a tool matched with the tibial plateau, the knee joint prosthesis tibial plateau specifically comprises a tibia support, the tibia support is of a hollow cylinder structure, and three convex bodies are fixedly arranged on the outer surface of the tibia support; a groove penetrating into the tibia support is formed in the abutment, and the abutment is fixedly arranged on the tibia support; the pushing device comprises extension rods arranged at the two ends of a worm, the worm with threads arranged on the outer surfaces of the two ends, turbines arranged on the two sides of the worm, upper supporting bodies arranged at the tops of the turbines and connected with the fixing device through first connecting bodies, and lower supporting bodies arranged at the bottoms of the turbines and connected with the fixing device. The fixing device is a hollow cone, a first spring is arranged in the fixing device, one end of the first spring is connected with the first connector, and the other end of the first spring is connected with a fixing block. According to the technical scheme, the technical problem that after the knee joint prosthesis is implanted into the tibia, the tibial plateau is unstable, the prosthesis is loosened and disengaged, and then bone fusion is affected is effectively solved.

The invention discloses an orthopedic ankle joint trauma recovery exercise device in the technical field of medical apparatus and instruments, comprising a base, a support rod fixedly connected to the top of the base, an adjusting assembly fixedly connected to the bottom wall of the base, movement grooves symmetrically formed in the base, movement assemblies fixedly connected in the movement grooves, tibia fixing assemblies symmetrically hinged to the support rod, and tibia fixing assemblies symmetrically hinged to the tibia fixing assemblies. The top end of the supporting rod is further fixedly connected with a controller, and the adjusting assembly, the movement assembly and the tibia fixing assembly are all in signal connection with the controller. According to the device, the requirement of three-dimensional composite rehabilitation exercise of the ankle joint of a patient is met by constructing a multi-degree-of-freedom platform, the ankle joint force application and fatigue threshold value of the patient are calculated and predicted in combination with multi-source data, real-time following of force application of the patient by resistance is achieved, efficient rehabilitation exercise is achieved, and the rehabilitation effect is improved. Buffering is actively released according to the magnetorheological fluid damping principle after the ankles of the patient reach the movement angle threshold value, the burden of movement inertia on the ankle joints of the patient is reduced, and secondary ankle sprain injuries possibly caused by rehabilitation movement are avoided.

The invention relates to the technical field of finite element modeling, in particular to a kinematics and dynamics index output method based on a human body model, which comprises the following steps of: S1, establishing acceleration modules at the head, the chest, the hip and the lower limbs of the human body model for global and local acceleration and angular velocity output; s2, building displacement modules at the chest, abdomen, knee joints and achilles tendons of the human body model, wherein the displacement modules are used for outputting the compression amount and the elongation amount; and S3, establishing section force modules at the spine, crista iliaca, femur and tibia of the human body model for outputting local force and torque. According to the scheme, the technical problem that kinematics and dynamics indexes of the human body model cannot be effectively extracted in the prior art can be solved, the obtained kinematics and dynamics indexes can be compared with data collected by various sensors in a real physical test, and biological fidelity verification of the human body model is facilitated.

The invention belongs to the technical field of intelligent sensing, and discloses a knee joint instability quantitative evaluation system and method based on double inertial sensors, the two inertial sensors and a flat plate form an execution carrier, a software algorithm is taken as a core, and the knee joint instability quantitative evaluation method based on the double inertial sensors is realized by accurately measuring the movement between two skeleton parts. And dynamic quantitative evaluation of clinical technique examinations such as a Lachman test, an axial shift test and the like is realized. According to the method, results of inspection methods such as axial displacement testing and Lachman testing are quantified, the tibia advancing distance (mm), the joint rotation angle (degree) and the relative acceleration (m / s) are directly output, dynamic quantification is achieved, and accurate grading data are provided for the ACL damage degree; subjective feelings are replaced by data, so that evaluation differences among different doctors are greatly reduced, diagnosis standards tend to be unified, and precise medical treatment can be realized.

The utility model provides a multi-curvature ankle joint prosthesis which comprises a tibia prosthesis connected with a tibia, a talus prosthesis connected with a talus and a cushion block with one side connected with the tibia prosthesis, a joint contact surface is arranged on the other side of the cushion block, and a talus contact surface matched with the joint contact surface is arranged on one side of the talus prosthesis. The curvature of the sagittal plane Z in the talus contact face is reduced from front to back, and the instantaneous rotation center of the talus prosthesis on the joint contact face is in an arc shape. According to the multi-curvature ankle joint prosthesis, the talus contact face and the anatomical structure of the human body are high in consistency, the natural form and the motion mode of the ankle joint are accurately restored, the ankle joint prosthesis better conforms to biomechanics and kinematics in the motion process, the motion stability of the human body is improved, local friction stress of the ankle joint prosthesis is smaller, and the ankle joint prosthesis is more stable in motion. And the service life of the ankle joint prosthesis is prolonged, so that the durability of the ankle joint prosthesis is improved.

The invention provides a trigger bouncing device and method for a flapping-wing flying robot, and relates to the technical field of bionic robots. The device comprises a bouncing execution mechanism, the bouncing execution mechanism comprises a paw, a tibia and a femur which are connected in sequence, and the tibia and the femur are rotatably connected through a knee joint shaft; the energy storage mechanism comprises an energy storage motor, a lower limiting rod, a fixed pulley, an upper limiting rod, a pulley rope, an energy storage torsion spring and a trigger buckle; wherein the energy storage motor and the lower limiting rod are arranged on the tibia, the knee joint shaft is sleeved with the fixed pulley, the upper limiting rod is arranged on the femur, and the pulley rope sequentially winds the output end of the energy storage motor, the lower limiting rod, the fixed pulley and the upper limiting rod; the two ends of the energy storage torsion spring abut against the tibia and the femur correspondingly, and the trigger buckle can clamp the upper limiting rod at the preset position. Energy is stored through the energy storage torsion spring, the tibia and the femur are pushed to rotate, and bouncing action is conducted. The device achieves a highly bionic effect in appearance, and is more in line with actual leg structures of birds.

A method for designing a uni-compartmental orthopaedic prosthesis includes generating a three-dimensional statistical model of a knee joint, determining a curvature of a section of a bone of the knee joint represented by the three-dimensional statistical model, and designing a section of the uni-compartmental orthopaedic prosthesis corresponding to the section of the bone of the knee joint to have a curvature that matches the curvature of the section of the bone of the knee joint. Additionally, a tibial and femoral uni-compartmental orthopaedic prosthesis are also disclosed, each of which includes a section having a curvature that matches a corresponding section of a corresponding bone of the knee joint represented by the three-dimensional statistical model.

The invention provides a tibia transverse moving device based on a universal rotating joint, relates to the technical field of orthopedic medical instruments, and solves the problems that in the prior art, during an operation, a bone needle is obliquely installed, and due to a rigid frame and single-plane adjustment of a traditional device, the bone needle is not stably fixed, stress is concentrated, and complications occur frequently. The device is mainly composed of a main body support, a universal rotating joint device and a short bone needle fixing mechanism, the device is symmetrically distributed on the two sides with an adjusting rotary knob as the center, in the using process, transverse moving of bones can be completed only by controlling the adjusting rotary knob, and multi-direction adjusting is achieved through universal rotating joints.

According to one example, a for revision knee arthroplasty is disclosed. According to this example, the method can include shaping a bone of a patient to create one or more recesses therein, selecting a stem provisional, disposing the stem provisional within the one or more recesses, and assembling in vivo the stem provisional with both a first provisional component configured to simulate a shape of one of a tibial tray implant or a femoral implant and a second provisional component configured to simulate a shape of at least one of a sleeve component, a cone component or a keel component of an implant.

The invention discloses a flexible knee joint exoskeleton for maintaining dynamic stability of knee joints in the technical field of lower limb rehabilitation, and the flexible knee joint exoskeleton comprises a control box, a control module and a power supply unit are integrated in the control box, and one side of the control box is fixed to the waist of a user through a bandage. The device further comprises a sensing unit, a tibia anterior movement limiting assembly and a support fixing assembly, the output end of the sensing unit is electrically connected with the input end of the control box, and the sensing unit is used for obtaining first movement information of a user and sending the first movement information to the control box; the control box identifies the walking trend and the knee joint state of the user based on the first motion information and an artificial intelligence algorithm, wherein the knee joint state is a six-degree-of-freedom kinematics state. According to the flexible knee joint exoskeleton, the Bowden cable and the tibia forward movement limiting assembly are cooperatively driven, human body lower limb kinematics information is collected in real time through the sensing unit, and the forward movement amplitude of the tibia of a user can be limited.

The ankle joint prosthesis comprises a tibia prosthesis and a talus prosthesis, the tibia prosthesis is provided with a keel, the keel is used for being implanted into a tibia and extends in the front-back direction of the tibia prosthesis, the talus prosthesis is arranged on the lower side of the tibia prosthesis, the talus prosthesis is provided with a fixing rod, and the fixing rod is arranged on the lower side of the tibia prosthesis. The fixing rod is used for being implanted into the talus and obliquely extends downwards from front to back, an included angle alpha is formed between the extending direction of the keel and the extending direction of the fixing rod, and alpha is larger than or equal to 10 degrees and smaller than or equal to 85 degrees. The ankle joint prosthesis is reasonable in structural design, the stability of the ankle joint prosthesis in the human body movement process can be enhanced, and the dislocation risk of the prosthesis is reduced.

A robot-aided knee arthroplasty system includes a robotic device and a controller communicable with the robotic device. The controller is configured to control the robotic device to apply a force configured to increase a gap distance between a femur and a tibia of a knee joint and collect measurements of the gap distance between the femur and the tibia as the robotic device applies the force.

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 invention provides a knee joint prosthesis and a tibial plateau thereof, and the tibial plateau comprises a second supporting platform and a first supporting platform which are arranged at an interval, and the position of the second supporting platform can be adjusted relative to the first supporting platform; the first end of the transmission part is movably arranged on the first supporting platform, and the second end of the transmission part is arranged on the second supporting platform; the driving structure comprises a mounting part and a driving part rotatably arranged on the mounting part, the rotating axis of the driving part is perpendicular to the axis of the mounting part, and the mounting part is rotatably arranged on the first supporting platform around the axis of the mounting part, so that the driving part drives the transmission part to rotate around the axis of the mounting part; the driving part is in driving fit with the transmission part so as to drive the transmission part to rotate in the direction parallel to the rotating axis of the driving part. According to the technical scheme, the problem that in the prior art, the relative position of the first supporting platform and the second supporting platform of the tibial plateau is inconvenient to adjust is effectively solved.

A knee joint prosthesis moves between an extended and flexion positions. The prosthesis includes a femoral component configured to be mounted to a femur, the femoral component having a femoral gear including a plurality of posts arranged along a helical trajectory. The prosthesis also includes a tibial component configured to (i) be mounted either directly or indirectly to a tibia, and (ii) engage the femoral component. The tibial component has a tibial gear including a plurality of recesses that are configured to mesh with the posts of the femoral gear. The tibial gear has two intersecting portions including a horizontally-oriented curved portion and a vertical portion, wherein each portion includes at least one of the recesses. The plurality of posts follow a helical trajectory to cause movement of the tibial component in either a medial or lateral direction as the knee joint prosthesis is moved to the extended position.

A system and methods are provided for an MIS ankle fusion plate and targeting guide for fixating the tibiotalar joint. The MIS ankle fusion plate comprises an upper portion that includes a tibial slot and cylindrical notches disposed on opposite edges of the upper portion. Tibial fixation holes are positioned above and below the tibial slot. The tibial fixation holes receive locking screws that fixate the fusion plate to the tibia. A lower portion of the fusion plate includes two talar fixation holes that receive locking screws to fixate the fusion plate to the talus. The targeting guide includes a plate guide portion for fixedly coupling with the fusion plate. Medial and lateral arms each join a targeting guide array with the plate guide portion. The targeting guide arrays are configured to support wire guides that facilitate establishing vectors for medial and lateral posterior fusion screws.

The invention discloses a lower limb exercise load assessment method and system based on multi-mode wearable equipment, and the method comprises the steps: 1) collecting exercise signals, three-dimensional track information and actual ground reaction force when a testee runs at different set speeds, and synchronizing the exercise signals, the three-dimensional track information and the actual ground reaction force through timestamps; 2) calculating the tibia force of the testee; 3) training a tibia force and vertical ground reaction force estimation model; 4) inputting the motion signals collected in real time into the tibia force and vertical ground reaction force prediction model to obtain predicted tibia force and vertical ground reaction force; and 5) calculating to obtain a lower limb exercise load evaluation index. The system comprises a pressure insole device, a pressure leg sleeve device, a surface myoelectricity device, an inertial sensor device, a training data acquisition module, a tibia force prediction model construction module, a vertical ground reaction force prediction model construction module, a vertical ground reaction force prediction module, a tibia force prediction module and a lower limb exercise load evaluation module. Compared with other methods, the method provided by the invention has higher systematicness and scientificity.

The invention discloses a unicondylar joint replacement tibial plateau vertical osteotomy positioning device, relates to the technical field of tibial replacement positioning, and provides the following scheme that the unicondylar joint replacement tibial plateau vertical osteotomy positioning device comprises a base, and two up-and-down position adjusting pieces are arranged on the surface of the top of the base in an up-and-down stacked mode. According to the technical scheme, the tibia fixator and the up-down position adjusting piece are arranged, the tibia is clamped and fixed through the tibia fixator, it is ensured that the tibia does not slide in the operation process, the silicon rubber case and the pressure sensor are arranged on the portion, making contact with the tibia, of the clamp, and the clamping force can be monitored while the surface of the tibia is prevented from being damaged. The vertical position adjusting part can adjust the clamping position of the clamp on the ankle, and the osteotomy angle adjusting part is additionally arranged to enable the linear laser transmitter to change the angle, so that rays with angles are projected on the tibia, a doctor can be helped to finely adjust the angle according to actual needs, and accurate positioning is ensured.

A bone fixator as disclosed herein includes at least one removable portion, and is particularly suitable for external fixation of the bones of the femur and tibia (knee joint), the tibia to the foot (ankle joint), the lower leg, the lower thigh, or the forearm and hand. Embodiments allow multiaxial, multiplanar movement, as well as procurvatum and recurvatum, on the anatomy to achieve optimal placement. Embodiments of the fixator includes four fixator joints, each of which is articulating with multiple degrees of freedom. Some fixator joint(s) include a linkage bar connectable to a multi-pin clamp having a quick connect mechanism. The multi-pin clamp is configured for fixation to a bone. Other fixator joint(s) may be connected to the multi-pin clamp in a semi-permanent or non-detachable manner. A telescoping rod assembly allows adjustment of the length of the fixator by a single individual.

The invention discloses an anterior cruciate ligament dead center positioning method based on three-dimensional geometric processing, and the method comprises the steps: obtaining a knee joint CT image of a knee joint of a human body and an anterior cruciate ligament related skeleton, and obtaining a three-dimensional mesh model of a femur and a tibia after preprocessing; traversing all three-dimensional vertex coordinates of the femur three-dimensional mesh model, generating contour lines from the bottom to the top, and selecting a contour line with the maximum perimeter as a feature contour line; after the feature contour line is projected, an extrusion model is obtained in a linear extrusion treatment mode, and the top face and the bottom face of the extrusion model are filled to obtain a complete closed extrusion model; obtaining a shaft alignment bounding box of the extrusion model so as to obtain a sphere model used for cutting, and obtaining a dial plate model by using the cut communication partition so as to obtain a 1-o'clock characteristic line; two feature vertexes are positioned through two times of cutting; obtaining a final dead center coordinate of the thighbone three-dimensional mesh model; the feature contour line of the tibia three-dimensional mesh model is obtained by adopting the method, the mesh is drawn according to the proportion, and the dead center coordinates of the tibia three-dimensional mesh model are positioned by penetrating out of the platform.

The invention provides a method for key point detection and angle measurement of an anterior X-ray image of an ankle joint, and belongs to the technical field of image processing. According to the method, an anterior X-ray image of an ankle joint is collected, a standard data set is constructed, and the data set is utilized to train a key point detection network. The method comprises the following steps: firstly, carrying out standardization processing on an anterior X-ray image of an ankle joint, and training a key point detection model by utilizing an annotation data set; then, the trained model is applied to a new X-ray image, and detection results of 12 key points are obtained through prediction of the model. And finally, based on a key point detection result, combining a mathematical algorithm and an image processing technology to calculate the following angles: a tibia lateral malleolus angle, a tibia medial malleolus angle, a tibia articular surface angle, a tibia ankle acupoint angle, a tibia ankle angle, a fibular ankle angle, a talus inclination angle, a medial and lateral malleolus angle and a tibia talus angle. The method can provide an accurate diagnosis basis for clinicians, helps orthopedists to quickly evaluate the health condition of the ankle joint, remarkably improves the accuracy and efficiency of angle measurement, and reduces manual operation time and errors. The method has wide application prospects in the fields of ankle joint injury assessment, treatment effect monitoring and the like.

The invention provides a TKA postoperative lower limb three-dimensional force line assessment method and system based on multi-modal data fusion and a computer readable storage medium. The TKA post-operation lower limb three-dimensional force line evaluation method based on multi-modal data fusion comprises the following steps: acquiring double lower limb CT images of a patient before total knee arthroplasty; wherein the coverage range of the two lower limbs is from the upper part of the hip joint to the lower part of the ankle joint; performing three-dimensional reconstruction on the double-lower-limb CT image to clearly display each skeleton and surrounding soft tissue structure of the lower limbs; a biplane lower limb full-length X-ray acquisition system is utilized to acquire normal position and lateral position X-ray images of two lower limbs of a patient at a load-bearing position, and the space relation between skeletons and prostheses of the lower limbs in the load-bearing state is determined; and performing fusion analysis on CT reconstruction data and data acquired by a biplane lower limb full-length X-ray acquisition system to form a fusion image in a three-dimensional space, and accurately calculating angles of a thighbone prosthesis, a tibia prosthesis and a lower limb force line in the three-dimensional space after the TKA operation.

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.

A dynamic ligament repair device includes a suture, a femoral side suture anchor and a threaded screw or housing implant. The screw is configured for placement in the tibia, or alternatively in the femur. A spring is housed inside an axial bore in the threaded screw. In some embodiments, the spring is a compression spring. A moveable spring button is positioned inside the axial bore adjacent a distal end of the spring. The spring button engages the spring directly in some embodiments. In alternative embodiments, an intermediate structure such as a spacer is positioned between the spring button and the spring. The suture extends between the spring button and the suture anchor. When the joint flexes or extends, the spring button travels inside the axial bore and dynamically compresses or relaxes the spring.

The invention relates to the technical field of balance systems, in particular to a load and gap balance system in a knee joint replacement operation. Mainly aiming at the problems that a doctor realizes symmetrical gap balance and ligament stress by virtue of a manual technology and subjective evaluation, an unsatisfactory result can be caused, and complications, such as instability, limited movement range and premature wear of an artificial knee joint prosthesis, are possibly caused, the following technical scheme is provided: the artificial knee joint comprises a knee joint, the knee joint comprises a femur and a tibia, and a medial collateral ligament and an lateral collateral ligament are connected between the femur and the tibia; the first osteotomy guider is used for cutting off the thighbone, the thighbone part of the first osteotomy guider is cut off to form a far-end osteotomy plane, and a thighbone prosthesis is installed at the position of the far-end osteotomy plane. According to the invention, the gap can be accurately measured, the ligament can be accurately tensioned, personalized alignment is realized, prosthesis selection is optimized, and the surgical effect of knee joint replacement, the satisfaction degree of a patient and the long-term durability of the prosthesis are effectively improved.