54 results about "Knee arthrodesis prosthesis" patented technology

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.

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.

The utility model provides a biological tibia prosthesis and a biological knee joint prosthesis. The biological type tibia prosthesis comprises a tibia support, a tibia prosthesis middle column is arranged on the bottom face of the tibia support, a rotatable ratchet wheel is arranged on the tibia prosthesis middle column, at least part of the ratchet wheel protrudes out of the outer surface of the tibia prosthesis middle column, a stop assembly is further arranged in the tibia prosthesis middle column, and the stop assembly can limit one-way rotation of the ratchet wheel. When the tibia prosthesis center pillar moves towards the inside of the medullary cavity, the ratchet wheel rotates under the action of the wall of the medullary cavity, and when the tibia prosthesis center pillar moves towards the outside of the medullary cavity, the ratchet wheel is kept in a static state under the action of the locking assembly. The biological knee joint prosthesis comprises the biological tibia prosthesis. According to the biological type tibia prosthesis, when the middle column of the tibia prosthesis moves towards the inside of a medullary cavity, the ratchet wheel can still be embedded into bone cortex and has a fixing function, and when the middle column of the tibia prosthesis moves towards the outside of the medullary cavity, the ratchet wheel is kept in a static state under the action of the stop assembly and has an anti-pulling effect.

Exemplary assemblies, apparatuses, systems, methods, and kits are provided herein related to modular tibial inserts. One such assembly can comprise a modular tibial insert assembly having: a modular medial insert component, the modular medial insert component having a medial component proximal side proximally disposed from a medial component distal base side, wherein a medial component body extends between the medial component proximal side and the medial component distal base side; a modular lateral insert component, the modular lateral insert component having a lateral component proximal side proximally disposed from a lateral component distal base side, wherein a lateral component body extends between the lateral component proximal side and the lateral component distal base side; wherein the modular tibial insert assembly has an assembled configuration and a disassembled configuration, and wherein the modular medial insert component is configured to fixedly engage the modular lateral insert component in the assembled configuration.

The application provides a knee joint prosthesis tibial plateau capable of enhancing fixation and a matching tool, and specifically comprises: a tibial tray, which is a hollow cylindrical structure and is externally provided with three convex bodies; a base, which is provided with a groove penetrating into the tibial tray and is fixed on the tibial tray; a pushing device, which comprises: an extension rod arranged at both ends of a worm, a worm with threads arranged on the outer surface of both ends, a turbine arranged at both sides of the worm, an upper support body arranged on the top of the turbine and connected with a fixing device through a first connecting body, and a lower support body arranged at the bottom of the turbine and connected with the fixing device; and the fixing device is a hollow cone, which is internally provided with a first spring, one end of the first spring is connected with the first connecting body, and the other end is connected with a fixing block. The technical scheme of the application effectively solves the technical problem that after the knee joint prosthesis is implanted into the tibia, the tibial plateau is not stable, the prosthesis is loose and comes off, and bone fusion is affected.

The application discloses a mechanical locking type tibial platform, a tibial prosthesis and a knee joint prosthesis. The mechanical locking type tibial platform comprises a platform holder used for being attached to the proximal end of a tibia, a middle column extending downward along the center of the platform holder and used for being inserted into the marrow cavity of the tibia, an axial hole being arranged in the center of the middle column, a sleeve arranged in the axial hole of the middle column, a limiting structure being arranged on the outer wall of the sleeve, the limiting structure being configured to cooperate with the middle column to enable the sleeve to slide only in the axial direction of the axial hole, a fastener connected to the sleeve and protruding from the outer side wall of the middle column and used for being inserted into the cortical bone of the tibia, and a stand column, one end of the stand column being provided with a limiting block used for abutting against the top surface of the platform holder, and the other end of the stand column being provided with a threaded segment which is threadedly connected to the inner wall of the sleeve. The cooperation of the stand column, the sleeve and the fastener can lock the platform holder to the proximal end of the tibia and ensure the initial stability of the tibial platform.

The invention belongs to the technical field of medical instruments, and particularly discloses a meniscus liner and a hinge type knee joint prosthesis. The meniscus liner comprises a liner body, in the thickness direction of the liner body, the liner body is provided with a connecting hole for a rotating shaft to penetrate through, the connecting hole comprises a taper hole section and a straight hole section which are sequentially communicated in the axial direction of the connecting hole, and the taper hole section comprises a plurality of sub-hole sections which are sequentially communicated in the axial direction of the taper hole section; the inner diameters of the sub-hole sections are sequentially reduced in the direction from the end, away from the straight hole section, of the taper hole section to the end, close to the straight hole section, of the taper hole section; one end of the rotating shaft can be installed on the straight hole section, the other end of the rotating shaft can abut against the inner wall face, away from the straight hole section, of the sub-hole section, and a containing cavity can be formed between the inner wall face of the taper hole section and the outer wall of the rotating shaft. Abrasion with a hinge assembly can be reduced, and discomfort of a patient can be relieved.

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.

The present invention discloses a knee joint prosthesis structure capable of retaining anterior and posterior cruciate ligaments, comprising a femoral prosthesis, a pad, a tibial prosthesis and a patellar prosthesis, wherein the femoral prosthesis is provided with two arc-shaped brackets, a first channel is formed between the two brackets, two pads are provided, a support surface is provided at the upper end of the pad, a second channel is formed between the two pads, and the tibial prosthesis is provided with two base blocks, a connecting column is provided at the lower end of the base block, and a third channel is formed between the two base blocks. The present invention provides the femoral prosthesis, the pad and the tibial prosthesis with a first channel, a second channel and a third channel corresponding to each other, respectively, so that the anterior and posterior cruciate ligaments between the femur and the tibia can move freely in the space of the first channel, the second channel and the third channel, thereby retaining the anterior and posterior cruciate ligaments of the original knee joint, retaining all the bone of the femoral intercondylar spine and the tibial intercondylar spine, improving the stability, proprioception and spatial position sense of the patient's knee joint after surgery, restoring the patient's function of going up and down stairs and squatting, achieving normal leg flexion and extension movement, and improving patient satisfaction.

A tibial spacer (10) includes a spacer block (16) including opposing bearing surfaces (18A, 18B), an alignment slot (14) extending into the spacer block, and a handle extending from the spacer block. The spacer block can include feet (12A, 12B) for passively engaging the femur or pegs (112A, 112B) for actively engaging the femoral component such that the spacer block is connected to the femur as the tibia rotates. A tibial spacer system includes a temporary component having an alignment tab (222) extending from a body and an alignment indicator on the body, a femoral component (240) and a pin (264) extending from the femoral component. The pin can engage the alignment tab such that the temporary component is connected to the femur as the tibia rotates. In addition to or as an alternative to the alignment tab and pin, the temporary component can include a tibial plate (30) that is rotatably connected to the temporary component.

The invention provides an individualized tibia defect repairing type knee joint prosthesis, and belongs to the technical field of orthopedic implants. The device is formed by assembling a femoral condyle, a femoral bone marrow needle, a plateau pad, a tibia plateau, a restoration body and a tibia bone marrow needle. Wherein the tibia platform and the restoration body are matched through metal-metal threads and are assisted by bone cement to achieve anti-rotation locking, the restoration body adopts a 3D printing individualized bone trabecula structure and is compounded with an HA coating to promote bone ingrowth, the tibia bone marrow needle and the platform are connected through a standard taper connector, inventory and individualization compatibility is achieved, and the bone marrow needle and the platform are connected through a standard taper connector. The defects that an existing prosthesis is large in bone mass loss, unattractive in reconstruction, free of bone ingrowth function, high in processing cost and the like are overcome, and the postoperative function of a tibia defect patient and the long-term stability of the prosthesis can be remarkably improved.

The present invention relates to a ceramic femoral component (200) of a knee prothesis comprising • - an inner surface of the femoral component, and • - at least one, preferably at least two projections (207a, 207b) extending inwardly away from the inner surface of the femoral component for guiding the ceramic femoral component on the patient's femur in anterior-posterior direction and positioning the ceramic femoral component on the patient's femur by formfit or pressfit.

This application relates to the technical field of medical devices, and particularly to an artificial knee joint prosthesis. An artificial knee joint prosthesis includes: a tibial tray; a liner mounted on the tibial tray; a femoral condyle prosthesis, which includes a femoral condyle metal component and a femoral condyle ceramic component. The femoral condyle ceramic component covers the outer wall of the femoral condyle metal component. The femoral condyle ceramic component is in sliding fit with the liner. The inner wall of the femoral condyle metal component is a 3D printed trabecular bone structure, which can achieve biological fixation and bone ingrowth. This application has the effect of reducing the friction between the liner and the femoral condyle prosthesis, reducing the particles generated by polyethylene wear, thereby reducing the occurrence of inflammation in patients, avoiding bone cement reactions, and reducing the occurrence of postoperative pain and joint instability in patients.

The present invention relates to the technical field of medical devices applied to artificial knee joint replacement surgery, and discloses a pressure measurement device, a preparation method and a pressure measurement equipment. Among them, the pressure measurement device is used to measure the pressure between artificial knee joint prostheses, and includes a substrate, a plurality of sensing units arranged on the surface of the substrate, and a packaging layer covering the sensing units. The substrate is arranged between the femoral component and the tibial component. The sensing units are arranged on one side of the substrate facing the femoral component, and at least can cover the area where the surface of the substrate contacts the bicondyles of the femoral component. The sensing unit includes a bottom electrode layer, a piezoelectric material layer and a top electrode layer arranged in a direction away from the substrate. The sensing unit is configured to convert the pressure applied by the femoral component to the surface of the substrate into an electrical signal and transmit it to an external signal processing device for analysis and processing to determine the pressure information on the surface of the substrate.

The invention discloses a knee joint data processing method and device, a storage medium and electronic equipment. The method comprises the following steps: constructing a target three-dimensional model according to medical image data of a target object and a target prosthesis; calculating a plurality of preset evaluation parameters according to the target three-dimensional model to obtain a target evaluation result; and adjusting the position of a target prosthesis in the target three-dimensional model according to the target evaluation result to obtain a target implantation position of the target prosthesis. Through the method and the device, the technical problem that the accuracy of determining the implantation position is relatively low due to the fact that the implantation position of the knee joint prosthesis is determined according to artificial experience in related technologies is solved.

The invention discloses a tibial prosthesis and a knee joint prosthesis with the tibial prosthesis. The tibial prosthesis comprises a patellar ligament attachment surface, a lateral collateral ligament attachment surface and a medial collateral ligament attachment surface, and the surface roughness of at least one of the patellar ligament attachment surface, the lateral collateral ligament attachment surface and the medial collateral ligament attachment surface is smaller than or equal to a preset value. The tibia prosthesis has the advantages of being small in friction, low in abrasion, free of inflammatory response and pain, capable of remarkably reducing postoperative pain and discomfort, beneficial to recovery of patients, capable of effectively maintaining stability and functions of knee joints, long in service life and the like.

The invention relates to the technical field of medical instruments, in particular to a 3D (three-dimensional) biological knee joint and a preparation method thereof.The 3D biological knee joint comprises a femoral condyle component, a tibia support component, a meniscus component and a patella component; according to the method, individualized knee joint data of a patient is obtained through CT / MRI scanning, reverse modeling is conducted in combination with Mimics software, a precisely-matched prosthesis three-dimensional model is generated, and the success rate is increased; based on specific anatomical features of a patient, adaptability errors of a traditional standardized prosthesis are avoided, operative wounds are reduced, and the initial stability of the prosthesis and a bone interface is improved. According to the invention, through the combination of technological processes such as individualized modeling, gradient functional coating, multi-process printing and post-treatment, the defects of a traditional knee joint prosthesis are overcome, and the properties such as remarkably improved biocompatibility, excellent antibacterial property, optimized mechanical matching property and accurate individualized adaptation are improved.

The knee prosthesis moves between an extended position and a flexion position. 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) directly or indirectly mount to the tibia and (ii) engage the femoral component. The tibial component has a tibial gear that includes a plurality of recesses configured to engage with a post of the femoral gear. The tibial gear has two intersecting portions including a horizontally oriented curved portion and a vertical portion, where each portion includes at least one of the recesses. When the knee prosthesis is moved to an extended position, the plurality of posts follow a helical trajectory to cause movement of the tibial component in a medial or lateral direction.

A knee prosthesis (1), comprising a tibial component (2) adapted to be implanted in the tibia of a patient, and a femoral component (3) adapted to be implanted in the femur of the patient; the tibial and femoral components (2, 3) are compatible with two different interface elements (4, 5), which are adapted to be interposed between the femoral component (3) and the tibial component (29; one (4) of the two interface elements(4, 5) being associable with the tibial and femoral components (2, 3) with an insert (4a-4c) without interposition of other elements in order to provide the Constrained Condylar Knee (CCK)-type knee prosthesis; the other interface element (5) being associable with the tibial and femoral components (2, 3) with an insert (5a-5b) and a hinge element (5b-5e) which are adapted to be inserted in the femoral component(3) and in the tibial component (2) in order to provide the Hinge Constrained Condylar Knee (HCCK)-type knee prosthesis.

The invention discloses a third-generation new axis type knee joint prosthesis, and belongs to the technical field of medical prostheses. Comprising a femoral bone marrow needle, an osteotomy section, a femoral condyle, a tibia plateau pad, a tee joint, a tibia plateau support and a tibia bone marrow needle. The femoral bone marrow needle is connected to the far end of the osteotomy section, and the tibia bone marrow needle is connected to the far end of the tibia platform support; the femoral condyle is connected to the near end of the osteotomy section, and the tibial plateau pad is connected to the near end of the tibial plateau support; the end face of the femoral condyle is matched with the end face of the tibial plateau support. A bent three-way pad is arranged at the slotting position of the end part of the femoral condyle, and a step baffle is arranged behind the other end of the three-way pad; the step baffle can abut against the bent three-way pad. Abnormal sound and metal scraps caused by direct collision between metals can be prevented, the infection risk of a patient is reduced, and the postoperative satisfaction degree of the patient is improved.

The invention relates to a knee prosthesis (1) comprising a bearing element (100) for a femoral implant of a total knee prosthesis, which is intended to be positioned on the tibial side and comprises an upper surface (41) on which a medial cavity (18) for receiving the medial condyle and a lateral cavity (19) for receiving the lateral condyle are arranged, wherein the medial cavity (18), viewed from above, has an ovoid shape with a mediolateral minor axis and an anteroposterior major axis, wherein the cavities (18, 19) have a concave profile and are separated by a raised region (20) located on the upper surface (41) between the two cavities (18, 19), which raised region extends in a horizontal plane along a curved generatrix having a concavity (180) oriented towards the medial cavity (18), wherein the raised region (20) has, along its generatrix, a convex outer profile, and wherein the lateral flank (209) of the raised region (20) has, in the horizontal plane, a radius of curvature greater than the radius of curvature of the medial flank; the invention also relates to any corresponding total knee prosthesis.

The utility model relates to the field of knee joint prostheses, in particular to a knee joint prosthesis with a reinforcing structure, which comprises a tibia support, a prosthesis body and a first fixing rod, a second fixing rod is arranged at the bottom of the tibia support, a mounting seat is embedded in the middle of the prosthesis body, and the bottom of the first fixing rod is fixedly connected with the top of the mounting seat. The tibia support and the prosthesis body are in implantation connection with knee joint bones of a patient through a second fixing rod and a first fixing rod respectively, the tibia support and the prosthesis body are rotationally connected through a first connecting piece and a second connecting piece, and a rubber column is fixedly installed at the bottom of the cylinder, installed in the sleeve in a clamped mode and capable of moving up and down in the sleeve. The knee joint of a patient can be bent conveniently, flexibility is higher, the tibia support and the prosthesis body are tightly connected and attached to each other through the first connecting piece and the second connecting piece, and loosening and falling are prevented.

The application discloses a shaft core type knee joint prosthesis and belongs to the technical field of artificial prosthesis. The knee joint prosthesis comprises a femoral condyle prosthesis and a tibial plateau support, and further comprises a tee joint structure. The top end of the femoral condyle prosthesis is connected with a bone cutting segment through taper cooperation, and the joint end of the femoral condyle prosthesis is provided with a transversely penetrating shaft hole. The top center of the tibial plateau support is fixed with a counterbore. One end of the tee joint structure is located in the counterbore. The other two opposite ends of the tee joint structure are located in the shaft hole of the femoral condyle prosthesis. The top of the tibial plateau support is provided with a tibial plateau pad corresponding to the joint end surface of the femoral condyle prosthesis. The joint end surface of the femoral condyle prosthesis is located on the upper surface of the tibial plateau pad. The adaptability and stability of the knee joint prosthesis are significantly increased.

The utility model provides a kind of tumour type knee joint prosthesis, for reconstructing the bone defect after distal femur tumour resection of children, including femur prosthesis and tibia prosthesis, the top of femur prosthesis is used to connect with distal femur, the bottom of tibia prosthesis is used to connect with proximal tibia, the bottom of femur prosthesis and the top of tibia prosthesis are connected by pin shaft rotation, the front side of tibia prosthesis is provided with limiting portion, limiting portion is used to limit tibia prosthesis and femur prosthesis knee hyperextension.In the front side of limiting portion is provided with the concave groove of recession to the rear, the intersection of the top surface and the front side of limiting portion is provided with avoidance chamfer.So, when patient carries out knee joint flexion, limiting portion no longer occurs interference with the inner side of patella, avoid limiting portion to patella damage.

The invention discloses a bionic meniscus mechanical adaptive knee joint prosthesis fixing device which comprises a tibia, a meniscus prosthesis, a fractal porous anchor and a shape memory polymer sleeve, the meniscus prosthesis is arranged on a platform of the tibia, the fractal porous anchor penetrates through the meniscus prosthesis and extends into the tibia, so that the meniscus prosthesis is fixed on the tibia platform, and the shape memory polymer sleeve is arranged in the shape memory polymer sleeve. The fractal porous anchor is of a gradient pore structure and can be directly inserted into bone tissue to form a minimally invasive channel, the shape memory polymer sleeve wraps the middle section, extending into the tibia, of the fractal porous anchor, the shape memory polymer sleeve shrinks at low temperature, and the glass transition temperature of the shape memory polymer sleeve is 31-38 DEG C. The three core problems that a traditional knee joint prosthesis is high in loosening rate, rapid in abrasion and poor in adaptability are solved, an innovative solution is provided for the field of orthopedic implants, and the knee joint prosthesis particularly conforms to the development trend of precise medical treatment and rapid rehabilitation surgery.

Exemplary assemblies, apparatuses, systems, methods, and kits are provided herein related to modular tibial inserts. One such assembly can comprise a modular tibial insert assembly (10) having: a modular medial insert component (20), the modular medial insert component having a medial component proximal side (28) proximally disposed from a medial component distal base side (23), wherein a medial component body (25) extends between the medial component proximal side and the medial component distal base side; a modular lateral insert component (30), the modular lateral insert component having a lateral component proximal side (38) proximally disposed from a lateral component distal base side (13), wherein a lateral component body (15) extends between the lateral component proximal side and the lateral component distal base side; wherein the modular tibial insert assembly has an assembled configuration and a disassembled configuration, and wherein the modular medial insert component is configured to fixedly engage the modular lateral insert component in the assembled configuration.

The invention discloses a knee joint prosthesis. The knee joint prosthesis comprises a thighbone component, a tibia component and a prosthesis coating. The tibia component comprises a tibia cushion block mechanism, a tibia articular surface liner mechanism, a tibia long rod mechanism, a medicine inserting cavity and a long rod slow-release medicine guide hole. The bending and stretching movement of a natural knee joint can be simulated between the thighbone component and the tibia component; in the postoperative stage, a sustained-release drug tablet is inserted into a drug insertion cavity, is guided downwards through a long-rod sustained-release drug guide hole, sequentially passes through a tibia cushion block mechanism and a tibia long-rod mechanism, and is gradually released to peripheral tissues of a knee joint prosthesis through the long-rod sustained-release drug guide hole; longitudinal three-dimensional medicine slow release from the articular surface to the marrow cavity is achieved, local infection can be restrained, postoperative inflammatory response can be relieved, the anti-infection effect is improved, the overall structure is designed in a modular mode, surgical operation, medicine supplement and assembly maintenance are facilitated, and good use convenience and safety are achieved.

The invention provides an intelligent knee joint prosthesis device and a detection system, and belongs to the technical field of medical instruments. A femoral condyle prosthesis and a tibial plateau; the fixing rod is fixedly connected into the femoral condyle prosthesis; the platform stand column is fixedly connected to the lower end of the tibia platform; according to the intelligent knee joint prosthesis device, the manufactured knee joint prosthesis can be accurately matched with the anatomical structure of each patient by using a personalized skeleton modeling technology, the integrating degree between the prosthesis and the skeleton of the patient is improved through the highly personalized solution, the discomfort and complications possibly occurring after an operation are reduced, and the operation efficiency is improved. Therefore, the life quality of a patient is remarkably improved, potential problems can be found and adjusted in time by continuously monitoring the pressure change and other motion parameters of the knee joint, and abrasion possibly generated in the long-term use process is avoided.

The invention relates to a femoral condyle prosthesis, a femoral condyle prosthesis system and a knee joint prosthesis, the femoral condyle prosthesis comprises a main body, a front side cushion block and a rear side cushion block, the main body comprises a front condyle part, a far end part and a rear condyle part, and the front condyle part, the far end part and the rear condyle part are sequentially connected; the front side cushion block is detachably installed on the side, facing the femur, of the front condyle part, and the rear side cushion block is detachably installed on the side, facing the femur, of the rear condyle part. According to the femoral condyle prosthesis, the front cushion block and the rear cushion block are arranged on the front condyle portion and the rear condyle portion of the main body respectively, the relative position of the femoral condyle prosthesis and the distal femur can be adjusted, the problem that the femoral condyle prosthesis moves forwards or backwards relative to the preset position after being implanted due to the fact that the osteotomy position is inaccurate is solved, and the stability of the knee joint after being implanted is guaranteed.

The invention discloses a construction method and application of a calculation model of varus knee joint contact stress, and the method comprises the steps: setting a femur and femur cartilage of a knee joint as first elastomers, setting a tibia and tibia cartilage as second elastomers, respectively setting a high-elasticity-modulus layer and a low-elasticity-modulus layer, applying a normal force to the high-elasticity-modulus layer and introducing a modification coefficient, obtaining the corrected contact radius and peak pressure, and constructing a dynamic equilibrium equation of the introversion knee joint; adding meniscus parameters, and constructing a peak contact stress model of double contact areas of the introversion knee joint; constructing a strain function for the low-elastic-modulus layer by adopting a Yeoh model to obtain the elastic modulus of the meniscus material during large strain; inputting the image data, the introversion angle and the load parameters of the subject into the mathematical model of the peak contact stress of the knee joint, comparing the obtained analytical solution with the numerical solution of the finite element model, and if the analytical solution is within a preset range, proving that the mathematical model is correct, and applying the mathematical model to the optimization application of the artificial meniscus and the knee joint prosthesis.