793 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.

Method for performing an ankle arthroplasty using a computer-assisted surgery system and an electromagnetic tracking system comprising at least a talar tracker, a tibial tracker and at least one surgical tool tracker, the method comprising:fixing the talar tracker, the tibial tracker and the surgical tool tracker, respectively, to a talus of the patient's leg, to a tibia of the patient's leg and to the surgical tool, to determine relative poses of the talus, the tibia and the surgical tool with respect to one another,obtaining at least one segmented pre-operative 3D image of the ankle,obtaining at least one per-operative 2D image of the ankle, each per-operative 2D image being acquired while a registration device comprising at least three radiopaque elements and at least one electromagnetic transceiver is placed on the ankle,registering the segmented pre-operative 3D image on each per-operative 2D image, using the registration device,determining an optimized pose of the final tibial component with respect to the tibia, and an optimized pose of the final talar component with respect to the tibia, based on at least one morphological criterion,determining a targeted shape of the talus and a targeted shape of the tibia to permit to position the final tibial component and the final talar component according to their respective planned optimized poses,machining the talus and the tibia with the surgical tool held by the robotic arm to obtain the targeted shapes, andimplanting the final tibial component on the machined tibia, the final talar component on the machined talus, and the final insert of the ankle implant between the final tibial component and the final talar component.

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 present application relates to a quality control method for medical images and a computer-readable storage medium. The method includes: obtaining an X-ray knee joint image, the X-ray knee joint image includes an anteroposterior knee joint image and / or a lateral knee joint image; inputting the X-ray knee joint image into an image segmentation model to obtain an image segmentation result; the image segmentation result includes an anteroposterior image segmentation result and / or a lateral image segmentation result, and the image segmentation result includes at least one of a femur mask, a fibula mask, a tibia mask, a patella mask, and a knee joint gap mask; based on the image segmentation result, calculating the quantitative result of the X-ray knee joint image under a first quality index; the first quality index is used to characterize whether the shooting position of each tissue in the X-ray knee joint image is standardized. The method greatly improves the efficiency of the quality control process of medical images; at the same time, it greatly improves the accuracy of the image segmentation results obtained, thereby improving the accuracy of the quality quantification results of the X-ray knee joint image.

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.

To provide a garment which prevents external rotation of a lower thigh, which tends to occur when walking, and makes toes straight.SOLUTION: A garment is formed of at least two belt-like strong tightening fabrics having strong tightening force and is worn in almost close contact with a wearer's surface. The strong tightening fabric has: a belt-like first strong tightening part which passes through the vicinity of the tibial tuberosity from a height slightly below the tibial tuberosity on the inside of the lower thigh, passes through the outer epicondyle of a thighbone, and extends from the back of the knee joint to the inner thigh portion above a knee joint space; and a belt-like second strong tightening part which is formed of a straight first portion which covers the fibula starting from a lower part in a longitudinal direction of the fibula up to the fibula head and extends to the outer epicondyle of the thighbone and a straight second portion which is changed into a prescribed angle at the outer epicondyle of the thighbone and extends from the outer epicondyle of the thighbone to the inner thigh portion above the knee joint space. The first strong tightening part and the second strong tightening part are intersected at the outer epicondyle of the thighbone.SELECTED DRAWING: Figure 1

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.

The invention discloses a leg structure of a biped robot, belongs to the technical field of humanoid robots, and solves the problem that the mass distribution of a series connection structure is too close to the tail end of a leg in the leg design on the basis of realizing two-degree-of-freedom rotation, namely left-right movement along an X axis and front-back movement along a Y axis. The movement of a human hip joint can be better simulated; the driver of the thigh part firstly drives the middleware, and then the middleware drives the driven part to move, so that relative sliding of the thighbone and the tibia and bending movement of the knee joint are simulated under the assistance of the middleware; the telescopic driving part of the shank part drives the universal joint to rotate at any angle in the telescopic process, meanwhile, the movable plate can conduct front-back pitching, left-right swinging and plane rotation, three-degree-of-freedom movement is achieved, the parallel structure is adopted, and better distribution of force and torque can be achieved.

The invention relates to the technical field of medical instruments, in particular to an adjustable bone-to-bone fixing device with a main nail and an implanting mechanism device.The adjustable bone-to-bone fixing device comprises the main nail, a fixing coil, a first auxiliary nail and a second auxiliary nail. Early load-bearing exercise of ankle joints of a patient is facilitated, ankle joint degeneration and traumatic arthritis are reduced, and the risk of fracture of an implant is greatly reduced; compared with elastic fixation, two fixing points are taken on the tibia, one fixing point is taken on the fibula, all the fixing points are connected through sutures, and the length of the sutures is adjustable, so that the tibia can bind the fibula in a surrounding mode through the sutures, compared with a single-strand suture transverse fixation mode, the fixation mode is closer to a native ligament, and fixation is more stable and reliable; and moreover, the micro-motion function between the tibia and the fibula is reserved while the bone removal amount is less.

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.

The present invention addresses the problem of providing a garment that restrains the outward rotation of a lower leg which is likely to occur when walking and prevents the twist of a lower limb when squatting down.　The problem has been solved by a garment that comprises a cloth for a hip joint section including a belt-like first strongly tightening part having an upper end as a waist part and passing through a region corresponding to the closest downside of the great trochanter and having the inside of the thigh as a lower end, and a second strongly tightening part having an upper end as a waist part and passing through the front surface of the hip joint and passing through the rear surface of the thigh from a region corresponding to the downside of the great trochanter and having the inside of the thigh as a lower end and / or a cloth for a knee joint section including a belt-shaped third tightening part from the downside of the tuberosity of the tibia to the vicinity of the tuberosity of the tibia, the lateral epicondyle of the femur and the inner aspect of the thigh upward of the rear side of the knee joint, and a belt-shaped fourth tightening part comprising a linear first section from the downside of the splint bone to the lateral epicondyle of the femur and a linear second section from the lateral epicondyle of the femur to the inner aspect of the thigh upward of the lateral epicondyle of the femur.

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 invention discloses an orthopedics traction reduction support, and relates to the technical field of auxiliary medical instruments, the orthopedics traction reduction support comprises a bearing assembly, two sides of the bearing assembly are provided with fixing assemblies, and the bottom of the bearing assembly is provided with a bottom support assembly. When the tibia and the following parts of a patient are fractured and dislocated, a medical worker supports the leg of the patient to the first soft cushion, under the action of the weight of the leg, related parts act, finally, the arc-shaped clamp turns over to clamp the leg, the bandage synchronously acts to reinforce fixation, and when fixation is relieved, the leg is lifted, the parts rebound, and the arc-shaped clamp is unfolded, so that the fixation of the leg of the patient can be relieved; the device is simple in structure and convenient to operate, can save more time and energy, remarkably improves the traction treatment efficiency, is simple and convenient in the whole operation process, is easy to implement, can drive the calf of a patient to bend and train, facilitates the promotion of muscle recovery, prevents joint adhesion and stiffness, and has a remarkable rehabilitation assisting effect.

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.

The utility model provides an ankle pump movement device for preventing lower limb deep venous thrombosis, which relates to the technical field of medical training and comprises a base and a pedal, a rotating shaft for controlling the pedal to rotate is arranged outside the base, and the pedal is arranged outside a support frame. A fixed adjusting mechanism used for adjusting the axis position of the supporting frame is arranged outside the rotating shaft, and the fixed adjusting mechanism comprises fixed plates symmetrically arranged outside the rotating shaft; through the arrangement of the gravity block, the control push plate, the control spring and the toe plate, a user can normally step on the foot when stepping on the foot. When the user hooks the feet, the toe plate can assist in completing upward hooking of tiptoes at the maximum angle, tibia anterior muscles can contract and become short, and triceps calf muscles can relax and extend, muscle contraction and relaxation are alternately carried out, blood and lymph backflow can be squeezed like a pump, and meanwhile, when the muscles are relaxed, the user can feel comfortable when hooking the feet. And fresh blood can be supplemented, so that a better exercise effect is achieved.

The invention relates to an orthopedic knee joint prosthesis (2) comprising a metallic femoral implant part (4), a metallic tiboral implant part (6), and a meniscus replacement part (8) which forms a sliding partner for the femoral implant part (4) and is held on the tiboral implant part (6), wherein the femoral implant part (4) in the implanted state has surface areas (10) facing the bone and in contact with the bone, wherein the femoral implant part (4) in the implanted state has articulating condylar surface areas (12) in sliding contact with the meniscus replacement part (8) as a sliding partner, wherein the tiboral implant part (6) in the implanted state has surface areas (16) facing the bone and in contact with the bone, and wherein the tiboral implant part (6) in the implanted state has surface areas (18) in contact with the meniscus replacement part (8).wherein the femoral implant part (4) and the tiboral implant part (6) each have surface areas (14, 20) in the implanted state that are not in contact with the bone or the meniscus replacement part, but are in contact with the soft tissue, wherein the femoral implant part (4) has at least a hardening and wear-reducing, in particular multilayer, coating (38) on the articulating condylar surface areas (12) that are in sliding contact with the sliding partner; according to the invention, it is proposed that the femoral implant part (4) and / or the tiboral implant part (6) has a three-dimensionally porous surface structure (30, 32) in the surface areas (10, 16) facing the bone to promote bone ingrowth into the implant part (4, 6),and that the femoral implant part (4) and / or the tiboral implant part (6) has a coating (52, 54) on the surface areas (14, 20) that are not in contact with the bone and not with the meniscus replacement part (8) but are in contact with soft tissue, at least in some areas, by means of which the surface roughness of these surface areas (14, 20) 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.