Bionic total ankle joint replacement prosthesis

Abstract

The invention provides a bionic total ankle joint replacement prosthesis, and belongs to the technical field of medical instruments. Comprising a talus prosthesis, a tibia prosthesis and a sliding liner arranged between the talus prosthesis and the tibia prosthesis, a second reinforcing assembly fixed with a tibia and the sliding liner is arranged on the tibia prosthesis, a cambered surface groove is formed in the top of the tibia prosthesis, and the top of the talus prosthesis is movably matched with the bottom of the sliding liner. According to the ankle joint rehabilitation device, the natural structure of the ankle joint of the human body is simulated, the normal movement function of the joint can be recovered, the joint movement is more flexible and natural, and multi-direction movement in the front-back direction, the left-right direction and other directions is formed; the functions of introversion, eversion, inward rotation, outward rotation and movement in other directions of the whole bionic total ankle joint replacement prosthesis are achieved, the movement range of the whole bionic total ankle joint replacement prosthesis is widened, the multidirectional bionic function is achieved, and the diversified requirements of daily life of patients are met.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and more particularly to a bionic total ankle replacement prosthesis. Background Art

[0002] The ankle joint is a critical weight-bearing joint in the human body, bearing the body's weight and participating in activities such as walking and running. When the ankle joint is severely damaged due to trauma, arthritis, or other causes, total ankle replacement is an effective treatment. Total ankle replacement is a surgical procedure that replaces the damaged ankle joint with an artificial joint, typically made of metal or plastic.

[0003] A search revealed a primary total ankle prosthesis with publication number CN111920551A, comprising a tibial prosthesis and a talar prosthesis, and a sliding pad disposed between the tibial and talar prostheses. The upper end of the tibial prosthesis forms an anti-sway assembly connected to the tibia, and its lower end is connected to the sliding pad. The upper end of the talar prosthesis flexibly engages with the sliding pad, and its lower end is fixed to the talus. The anti-sway assembly includes a square boss at the upper end of the tibial prosthesis, the cross-section of the square boss gradually decreasing from top to bottom, and the longitudinal section gradually decreasing from front to back. The present invention connects the square boss of the tibial prosthesis to the tibia, thereby increasing the contact area between the tibial prosthesis and the tibia, improving the implant stability of the total ankle prosthesis. The square boss is shaped so that the square boss fits tightly with the groove as the ankle joint moves, preventing the total ankle prosthesis from loosening or falling out, extending the service life of the total ankle prosthesis, and avoiding further harm to the patient caused by reoperation.

[0004] In combination with the above patents, it is found that the existing total ankle replacement prosthesis has certain shortcomings: the cooperation of the sliding guide rail and the sliding pad provided on the talar prosthesis only realizes the function of forward and backward movement, that is, the function of inversion and eversion, and cannot realize the functions of other directions such as internal rotation and external rotation, which makes the range of motion of the entire bionic total ankle replacement prosthesis limited, and cannot provide bionic functions in multiple directions, and cannot meet the diverse needs of patients in daily life. Therefore, it is urgent to design a bionic total ankle replacement prosthesis to solve the above problems. Summary of the Invention

[0005] In view of the problems in the prior art that bionic total ankle replacement prostheses have limited range of motion, cannot provide bionic functions in multiple directions, and cannot meet the diverse needs of patients in daily life, the purpose of the present invention is to provide a bionic total ankle replacement prosthesis.

[0006] To solve the above problems, the present invention adopts the following technical solutions.

[0007] A bionic total ankle replacement prosthesis includes a talar prosthesis and a tibial prosthesis, and a sliding pad disposed between the talar prosthesis and the tibial prosthesis. The tibial prosthesis is provided with a second reinforcement component fixed to the tibia and the sliding pad. The top of the tibial prosthesis is provided with a curved groove. The top of the talar prosthesis movably cooperates with the bottom of the sliding pad, and the talar prosthesis is fixed to the talus.

[0008] The top surface of the talar prosthesis is designed as a concave spherical groove, and the bottom surface of the sliding pad is designed as a convex spherical shape. The bottom surface of the sliding pad is adapted to the top surface of the talar prosthesis. A movable groove is provided in the middle of the spherical groove, and a mounting groove is provided in the middle of the bottom of the sliding pad. A sliding frame is installed on the inner wall of the mounting groove. The lateral cross-sections of the sliding frame and the movable groove are both designed to be inverted T-shaped, and the bottom surface of the movable groove and the top of the inner wall near the middle, as well as the bottom surface of the sliding frame and the top surface near the corner are all designed to be spherical.

[0009] A fixed frame is fixed at the middle position of the bottom inner wall of the movable groove, and positioning components are provided on the outer walls around the fixed frame and the inner walls around the sliding frame;

[0010] The bottom of the talar prosthesis is provided with a bottom groove, and the middle of the inner wall of the bottom groove is provided with a fixing piece. The talar prosthesis is provided with a first reinforcement component fixed to the talus.

[0011] Optionally, the transverse arc length and the longitudinal arc length of the movable groove are both greater than the transverse arc length and the longitudinal arc length of the sliding frame, and the sliding frame and the movable groove are slidably matched.

[0012] Optionally, the positioning component includes guide holes opened around the sliding frame, and the guide holes are connected to the interior of the sliding frame. The inner walls of the guide holes are connected with guide rods, and a support frame is fixed to one end of the guide rod. The support frames are distributed around the sliding frame. One side of the support frame is rollingly connected with rolling balls distributed at equal distances, and the rolling balls are attached to the surface of the sliding frame. The other side of the support frame is installed with a memory metal plate on the inner wall of the sliding frame, and the memory metal plate is designed to be continuously bent.

[0013] Optionally, the first reinforcement component includes a plurality of inclined first fixing holes formed on the talar prosthesis, and first reinforcement screws are inserted into the inner walls of the first fixing holes, and the tail ends of the first reinforcement screws are screwed and fixed to the talus.

[0014] Optionally, the second reinforcement component includes connecting grooves arranged on both sides of the bottom of the tibial prosthesis, and connecting plates inserted in the connecting grooves are fixed on both sides of the top of the sliding pad, and second fixing holes passing through the arc groove and the tibia are opened at both ends of the tibial prosthesis, and a second reinforcement screw is inserted into the inner wall of the second fixing hole, and a nut cover is screwed on the tail end of the second reinforcement screw, and through holes are opened on the two connecting plates for the second reinforcement screw to pass through.

[0015] Optionally, a docking interface is provided in the middle of the top of the sliding pad, and a docking block inserted into the docking interface is fixed in the middle of the bottom of the tibial prosthesis, a plurality of second positioning sockets connected to the mounting groove are provided on both sides of the bottom of the docking interface, and a plurality of second positioning screw grooves are provided on both sides of the top of the sliding frame, and second positioning screws are inserted into the inside of the second positioning sockets, and the second positioning screws are screwed into the second positioning screw grooves.

[0016] Optionally, a protrusion that matches the talus is fixedly mounted on one end of the talus prosthesis, and a plurality of grooves are provided on the protrusion.

[0017] Optionally, a reinforcement frame is provided on the inner wall of the bottom trough, and the reinforcement frame is fixed by a plurality of special-shaped strips staggered horizontally and vertically.

[0018] Optionally, the fixing member includes a medullary needle that is attached to the middle of the inner wall of the bottom groove, and a first positioning screw groove is opened in the middle position of the top of the medullary needle, a first positioning socket connected to the bottom groove is opened in the middle position of the bottom of the movable groove, a first positioning screw is inserted into the inner wall of the first positioning socket, and the first positioning screw is screwed into the first positioning screw groove, the outer wall of the medullary needle is fixed with equidistantly distributed inclined plates, and a first filling groove is opened in the middle of the bottom of the medullary needle, and the outer wall of the medullary needle is opened with equidistantly distributed second filling grooves, and the position of the second filling groove is staggered with the position of the inclined plate.

[0019] Optionally, the fixing member includes a medullary needle attached to the middle of the inner wall of the bottom groove, and a first positioning screw groove is opened in the middle position of the top of the medullary needle, a first positioning socket connected to the bottom groove is opened in the middle position of the bottom of the movable groove, a first positioning screw is inserted into the inner wall of the first positioning socket, and the first positioning screw is screwed into the first positioning screw groove, a spiral plate is fixed to the outer wall of the medullary needle, and a first filling groove is opened in the middle of the bottom of the medullary needle, and a third spiral filling groove is opened on the outer wall of the medullary needle, and the position of the third filling groove is staggered with the position of the spiral plate.

[0020] Compared with the prior art, the technical solution provided by the present invention has at least the following beneficial effects:

[0021] In the above scheme, the top surface of the talar prosthesis is designed as a concave spherical groove, and the bottom surface of the sliding pad is designed as a convex spherical shape. The two are adapted to each other, and the arc groove set on the top of the tibial prosthesis simulates the natural structure of the human ankle joint, which helps to restore the normal movement function of the joint, making the joint movement more flexible and natural, and cooperates with the sliding frame to move in a spherical manner in the movable groove, so that the tibia drives the sliding frame, sliding pad and tibial prosthesis to move in multiple directions such as front, back, left, right and other directions during the movement, realizing the functions of inversion, eversion, internal rotation, external rotation and other directions of the entire bionic total ankle joint, improving the range of motion of the entire bionic total ankle replacement prosthesis, forming multi-directional bionic functions, and meeting the diverse needs of patients in daily life.

[0022] Through the inverted T-shaped design of the movable groove and the sliding frame and the sliding fit between them, not only the lateral and longitudinal displacement of the sliding pad is limited, but it can also withstand forces in all directions to a certain extent, thereby enhancing the stability of the joint prosthesis. Under the action of the second reinforcement component, the sliding pad, tibial prosthesis and tibia are fixed at the same time, further improving the connection stability between the sliding pad, the tibial prosthesis and the tibia, preventing the sliding pad from shifting or shaking during use, and facilitating simultaneous disassembly and assembly.

[0023] The positioning components arranged on the inner walls around the sliding frame and the outer walls around the fixed frame can limit the range of motion of the sliding frame, thereby avoiding the problem of ankle joint injury caused by excessive range of motion of the sliding frame, sliding pad and tibial prosthesis; under the action of the memory metal plate, its memory force simulates the stress during ankle joint movement, and adaptively adjusts according to the joint movement state, further improving the bionic performance of the entire total ankle replacement prosthesis.

[0024] The protrusions and grooves at one end of the talar prosthesis can better fit the shape of the talus, enhancing the fit and adaptability of the talar prosthesis to the talus. By filling the filling groove with bone cement, combined with the reinforcement frame and medullary pins and oblique plates in the fixator, the contact area with the talus is increased, improving the fixation effect, and providing space for bone tissue growth, promoting the integration of the prosthesis and bone tissue, and improving the stability and long-term use effect of the prosthesis. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, further serve to explain the principles of the invention and to enable one skilled in the art to make and use the invention.

[0026] Figure 1 A perspective view of the present invention;

[0027] Figure 2 It is a front cross-sectional view of the present invention;

[0028] Figure 3 is a side sectional view of the present invention;

[0029] Figure 4 This is a schematic diagram of the docking block and connecting groove structure of the present invention;

[0030] Figure 5 This is a schematic diagram of the mounting groove and perforation structure of the present invention;

[0031] Figure 6 This is a schematic structural diagram of the docking port and the second positioning screw of the present invention;

[0032] Figure 7 It is a schematic diagram of the spherical groove and sliding frame structure of the present invention;

[0033] Figure 8 is a cross-sectional view of the talar prosthesis of the present invention;

[0034] Figure 9 This is a schematic structural diagram of the sliding frame and memory metal plate of the present invention;

[0035] Figure 10 A bottom view of the talar prosthesis of the present invention;

[0036] Figure 11 It is a structural schematic diagram of the reinforcement frame of the present invention;

[0037] Figure 12 It is a schematic diagram of the structure of the medullary needle of the present invention;

[0038] Figure 13 It is a schematic diagram of the structure of the medullary needle of the present invention;

[0039] Figure 14 Schematic diagram of the spiral plate structure of the present invention.

[0040] [Reference Signs]

[0041] 1. Talus prosthesis; 2. Sliding pad; 3. First reinforcement screw; 4. Tibial prosthesis; 5. Second fixation hole; 6. Second reinforcement screw; 7. Arc groove; 8. Protrusion; 9. Bottom groove;

[0042] 10. Fixing member; 101. Medullary needle; 102. First filling slot; 103. Inclined plate; 104. Second filling slot; 105. Spiral plate; 106. Third filling slot;

[0043] 11. Reinforcement frame; 12. Sliding frame; 13. Connecting plate; 14. Docking port; 15. Docking block; 16. Fixed frame;

[0044] 17. Positioning assembly; 171. Guide rod; 172. Memory metal plate; 173. Support frame; 174. Rolling ball;

[0045] 18. Movable slot; 19. Groove; 20. First positioning screw; 21. Nut cover; 22. Connecting slot; 23. Through hole; 24. Mounting slot; 25. Second positioning socket; 26. Second positioning screw; 27. Spherical slot; 28. First fixing hole; 29. First positioning socket; 30. Second positioning screw groove; 31. First positioning screw groove.

[0046] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments. DETAILED DESCRIPTION

[0047] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments. It is also noted that, to provide a more detailed description, the following embodiments are best and preferred embodiments, and those skilled in the art may employ alternative methods for implementing certain known technologies. Furthermore, the accompanying drawings are intended only to provide a more detailed description of the embodiments and are not intended to limit the present invention.

[0048] It should be noted that references in the specification to "one embodiment," "an embodiment," "exemplary embodiments," "some embodiments," etc. indicate that the described embodiments may include specific features, structures, or characteristics, but not necessarily every embodiment will include such specific features, structures, or characteristics. Furthermore, when specific features, structures, or characteristics are described in conjunction with an embodiment, it is within the knowledge of persons skilled in the relevant art to implement such features, structures, or characteristics in conjunction with other embodiments (whether or not explicitly described).

[0049] In general, terms can be understood, at least in part, from their use in context. For example, depending at least in part on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending at least in part on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0050] It will be understood that the meanings of “on,” “over,” and “above” in the present invention should be interpreted in the broadest manner, so that “on” means not only “directly on” something but also includes the meaning of being “on” something with intervening features or layers, and “on” or “above” means not only “on” or “above” something but also includes the meaning of being “on” or “above” something with no intervening features or layers.

[0051] Additionally, spatially relative terms such as "below," "beneath," "lower," "above," and "upper" may be used herein for descriptive convenience to describe the relationship of one element or feature to another element or features, as illustrated in the accompanying drawings. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially relative descriptors used herein should be similarly interpreted accordingly.

[0052] Example 1

[0053] like Figures 1 to 13 As shown, an embodiment of the present invention provides a bionic total ankle replacement prosthesis, comprising a talar prosthesis 1 and a tibial prosthesis 4, and a sliding pad 2 disposed between the talar prosthesis 1 and the tibial prosthesis 4. The tibial prosthesis 4 is provided with a second reinforcement component fixed to the tibia and the sliding pad 2. The top of the tibial prosthesis 4 is provided with an arcuate groove 7. The top of the talar prosthesis 1 movably cooperates with the bottom of the sliding pad 2. The talar prosthesis 1 is fixed to the talus. The sliding pad 2 is made of polyethylene material, and the talar prosthesis 1 and the tibial prosthesis 4 are made of titanium alloy material.

[0054] like Figure 7 As shown, the top surface of the talar prosthesis 1 is designed as a concave spherical groove 27, and the bottom surface of the sliding pad 2 is designed as a convex spherical shape. The convex spherical shape of the sliding pad 2 is adapted to the spherical groove 27, and the bottom surface of the sliding pad 2 is adapted to the top surface of the talar prosthesis 1. A movable groove 18 is opened in the middle of the spherical groove 27, as shown in FIG. Figure 5 As shown, a mounting groove 24 is provided at the middle of the bottom of the sliding pad 2. Figure 2 and Figure 3As shown, the inner wall of the mounting groove 24 is mounted with a sliding frame 12, and the lateral cross-sections of the sliding frame 12 and the movable groove 18 are both designed to be inverted T-shaped, and the bottom surface of the movable groove 18 and the top of the inner wall near the middle, as well as the bottom surface of the sliding frame 12 and the top surface near the corner are all designed to be spherical, the transverse arc length and the longitudinal arc length of the movable groove 18 are both greater than the transverse arc length and the longitudinal arc length of the sliding frame 12, and the sliding frame 12 and the movable groove 18 are slidably fitted. The top surface of the talar prosthesis 1 is designed to be a concave spherical groove 27, and the bottom surface of the sliding pad 2 is designed to be a convex spherical shape. The two are adapted to each other, and the arc groove 7 is provided on the top of the tibial prosthesis 4. This simulates the natural structure of the human ankle joint, helps to restore the normal movement function of the joint, and makes the joint movement more flexible and natural. In addition, the sliding frame 12 moves in a spherical manner in the movable groove 18, so that the tibia drives the sliding frame 12, the sliding pad 2 and the tibial prosthesis 4 to move in multiple directions such as front and back, left and right, and other directions during the movement, thereby realizing the functions of inversion, eversion, internal rotation, external rotation and other directional activities of the entire bionic total ankle joint, improving the range of motion of the entire bionic total ankle replacement prosthesis, forming multi-directional bionic functions, and meeting the diverse needs of patients in daily life;

[0055] like Figure 2 As shown, a fixed frame 16 is fixed to the middle position of the bottom inner wall of the movable groove 18, and a positioning assembly 17 is provided between the outer walls of the fixed frame 16 and the inner walls of the sliding frame 12. The positioning assembly 17 includes guide holes opened around the sliding frame 12, and the guide holes are connected to the interior of the sliding frame 12. The inner walls of the guide holes are all plugged with guide rods 171. Figure 9 and 10 As shown, one end of the guide rod 171 is fixedly connected to the support frame 173, and the support frame 173 is distributed around the sliding frame 12. One side of the support frame 173 is rollingly connected with equidistantly distributed rolling balls 174, and the rolling balls 174 are attached to the surface of the sliding frame 12. The other side of the support frame 173 is connected to one end of the memory metal plate 172, and the other end of the memory metal plate 172 is connected to the inner wall of the sliding frame 12, and the memory metal plate 172 is designed to be continuously bent. The above-mentioned positioning component 17 can limit the range of motion of the sliding frame 12, avoiding the problem of ankle joint injury caused by excessive range of motion of the sliding frame 12, the sliding pad 2 and the tibial prosthesis 4. Under the action of the internal memory metal plate 172, its memory force simulates the stress during ankle joint movement, and is adaptively adjusted according to the joint movement state, further improving the bionic performance of the entire total ankle replacement prosthesis;

[0056] like Figure 2 and Figure 3 As shown, a bottom groove 9 is provided at the bottom of the talar prosthesis 1, and a fixing member 10 is provided at the middle of the inner wall of the bottom groove 9. A first reinforcement component fixed to the talus is provided on the talar prosthesis 1.

[0057] like Figure 1 、 Figure 3 、 Figure 7 and Figure 8 As shown, the first reinforcement component includes a plurality of inclined first fixing holes 28 opened on the talar prosthesis 1, and the inner walls of the first fixing holes 28 are inserted with first reinforcement screws 3, and the tail ends of the first reinforcement screws 3 are screwed and fixed to the talus. By opening a plurality of inclined first fixing holes 28 on the talar prosthesis 1 and inserting the first reinforcement screws 3 to screw and fix them to the talus, the talar prosthesis 1 is firmly fixed to the talus.

[0058] like Figure 1 、 Figure 2 、 Figure 4 、 Figure 6 As shown, the second reinforcement component includes connecting grooves 22 arranged on both sides of the bottom of the tibial prosthesis 4, and connecting plates 13 inserted into the connecting grooves 22 are fixed on both sides of the top of the sliding pad 2. A second fixing hole 5 is opened at both ends of the tibial prosthesis 4, which passes through the arc groove 7 and the tibia, and a second reinforcing screw 6 is inserted into the inner wall of the second fixing hole 5. The tail end of the second reinforcing screw 6 is screwed with a nut cover 21. A through hole 23 for the second reinforcing screw 6 to pass through is opened on the two connecting plates 13. The second reinforcing screw 6, the first reinforcing screw 3 and the nut cover 21 are made of decomposable material, as shown in FIG. Figures 1-6 , through the connection grooves 22 on both sides of the bottom of the tibial prosthesis 4 and the connection plates 13 on both sides of the top of the sliding pad 2, and the second fixing holes 5 penetrating the arc grooves 7 are opened at both ends of the tibial prosthesis 4, the second reinforcing screws 6 are inserted, passed through the through-holes 23, and fixed by the nut cover 21, so as to facilitate the firm connection of the tibial prosthesis 4, the sliding pad 2 and the tibia. The sliding pad 2 made of polyethylene material has good wear resistance and flexibility, and can play a buffering and sliding role between the talar prosthesis 1 and the tibial prosthesis 4. The talar prosthesis 1 and the tibial prosthesis 4 are made of titanium alloy material, which has high strength and good biocompatibility and can withstand the weight of the human body and the stress during joint movement.

[0059] like Figure 2-Figure 6 As shown, a docking port 14 is provided at the middle of the top of the sliding pad 2, and a docking block 15 is fixed at the middle of the bottom of the tibial prosthesis 4 and inserted into the docking port 14. A plurality of second positioning holes 25 communicating with the mounting groove 24 are provided on both sides of the bottom of the docking port 14. Figure 9As shown, a plurality of second positioning screw grooves 30 are provided on both sides of the top of the sliding frame 12, and second positioning screws 26 are inserted into the interior of the second positioning sockets 25. The second positioning screws 26 are screwed into the second positioning screw grooves 30, and the docking port 14 in the middle of the top of the sliding pad 2 is plugged into the docking block 15 in the middle of the bottom of the tibial prosthesis 4. The sliding frame 12 and the docking port 14 are then fixed by the second positioning screws 26 to enhance the connection stability between the sliding frame 12 and the sliding pad 2.

[0060] like Figure 2 、 Figure 11 and Figure 12 As shown, one end of the talar prosthesis 1 is fixedly mounted with a protrusion 8 that matches the talus, and a plurality of grooves 19 are provided on the protrusion 8. A reinforcement frame 11 is provided on the inner wall of the bottom groove 9, and the reinforcement frame 11 is fixed by a plurality of horizontally and vertically staggered special-shaped strips. The above-mentioned grooves 19 and reinforcement frame 11 are used to provide it with more contact points and contact surfaces with the surrounding bones or soft tissues, thereby improving stability.

[0061] like Figure 2 、 Figure 3 、 Figure 8 、 Figure 11 、 Figure 12 and Figure 13 As shown, the fixing member 10 includes a medullary needle 101 that is attached to the middle of the inner wall of the bottom groove 9, and a first positioning screw groove 31 is provided at the middle position of the top of the medullary needle 101, and a first positioning socket 29 that is connected to the bottom groove 9 is provided at the middle position of the bottom of the movable groove 18. A first positioning screw 20 is inserted into the inner wall of the first positioning socket 29, and the first positioning screw 20 is screwed into the first positioning screw groove 31. The outer wall of the medullary needle 101 is fixed with equidistantly distributed inclined plates 103, and a first filling groove 102 is opened in the middle of the bottom of the medullary needle 101, and the outer wall of the medullary needle 101 is opened with equidistantly distributed second filling grooves 104. The position of the second filling groove 104 is staggered with the position of the inclined plates 103. The inclined plates 103 are used to increase the contact area and friction between the fixing member 10 and the surrounding bone tissue, which is conducive to better fixation in the bone, preventing the fixing member 10 and even the talar prosthesis 1 from changing angles, and under the action of the first positioning screw 20 and the first positioning screw groove 31, the fixing member 10 has the performance of being easy to disassemble and assemble, so that the fixing member 10 is convenient to replace.

[0062] Example 2

[0063] Reference Figure 14Compared with Example 1, the fixing member 10 in this embodiment includes a medullary pin 101 that is attached to the middle of the inner wall of the bottom groove 9, and a first positioning screw groove 31 is provided at the middle position of the top of the medullary pin 101, and a first positioning socket 29 communicating with the bottom groove 9 is provided at the middle position of the bottom of the movable groove 18. A first positioning screw 20 is inserted into the inner wall of the first positioning socket 29, and the first positioning screw 20 is screwed into the first positioning screw groove 31. A spiral plate 105 is fixed to the outer wall of the medullary pin 101, and a first filling groove 102 is provided at the middle of the bottom of the medullary pin 101. A third filling groove 106 of the same spiral shape is provided on the outer wall of the medullary pin 101, and the position of the third filling groove 106 is staggered with the position of the spiral plate 105. The above-mentioned spiral plate 105 is used to increase the contact area and friction between the fixing member 10 and the surrounding bone tissue in a spiral manner, which is conducive to better fixation in the bone and prevents the fixing member 10 and even the talar prosthesis 1 from changing angles.

[0064] The working process of the technical solution provided by the present invention is as follows:

[0065] The talar prosthesis 1 is fixed to the talus by opening a plurality of inclined first fixing holes 28 on the talar prosthesis 1, inserting the first reinforcing screws 3 and screwing them together with the talus, so that the talar prosthesis 1 is firmly fixed to the talus, and the connecting grooves 22 on both sides of the bottom of the tibial prosthesis 4 cooperate with the connecting plates 13 on both sides of the top of the sliding pad 2, and second fixing holes 5 are opened at both ends of the tibial prosthesis 4 through the arc groove 7, and the second reinforcing screws 6 are inserted, pass through the through holes 23 on the connecting plate 13, and are fixed by the nut cover 21, so that the tibial prosthesis 4, the sliding pad 2 and the tibia are firmly connected. In addition, the sliding frame 12 is fixed to the sliding pad 2 by the second positioning screws 26, and the fixing member 10 is fixed in the bottom groove 9 by the first positioning screws 20, and cooperates with the reinforcement frame 11. Various textures are designed on the articular surface and the contact surface with the bone to increase the surface roughness and increase the contact surface, so that the talar prosthesis 1 is better fixed in the bone. The filling groove on the medullary needle 101 can be filled with bone cement or other materials after implantation to further enhance the fixing effect;

[0066] Since the transverse arc length and longitudinal arc length of the movable groove 18 are both greater than the transverse arc length and longitudinal arc length of the sliding frame 12, the sliding frame 12 can slide in the movable groove 18, providing a certain range of motion for the ankle joint, so that the tibia can drive the sliding frame 12, the sliding pad 2 and the tibial prosthesis 4 to perform multi-directional movements in the front, back, left, right and other directions during the movement, thereby realizing the functions of inversion, eversion, internal rotation, external rotation and other directional movements of the entire bionic total ankle joint, and under the action of the memory metal plate 172, its memory simulates the stress during ankle joint movement, and adaptively adjusts according to the joint movement state, further improving the bionic performance of the entire total ankle replacement prosthesis.

[0067] The present invention encompasses any alternatives, modifications, equivalents, and solutions that fall within the spirit and scope of the present invention. To provide a thorough understanding of the present invention, specific details are described in detail below in connection with the preferred embodiments of the present invention, but those skilled in the art will be able to fully understand the present invention without these detailed descriptions. Furthermore, to avoid unnecessary confusion regarding the essence of the present invention, well-known methods, processes, procedures, components, and circuits have not been described in detail.

[0068] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A bionic total ankle replacement prosthesis, characterized in that: The invention comprises a talar prosthesis and a tibial prosthesis, and a sliding pad disposed between the talar prosthesis and the tibial prosthesis. The tibial prosthesis is provided with a second reinforcement component fixed to the tibia and the sliding pad. The top of the tibial prosthesis is provided with an arcuate groove. The top of the talar prosthesis is movably engaged with the bottom of the sliding pad. The talar prosthesis is fixed to the talus. The top surface of the talar prosthesis is designed as a concave spherical groove, and the bottom surface of the sliding pad is designed as a convex spherical shape. The bottom surface of the sliding pad is adapted to the top surface of the talar prosthesis. A movable groove is provided in the middle of the spherical groove, and a mounting groove is provided in the middle of the bottom of the sliding pad. A sliding frame is installed on the inner wall of the mounting groove. The lateral cross-sections of the sliding frame and the movable groove are both designed to be inverted T-shaped, and the bottom surface of the movable groove and the top of the inner wall near the middle, as well as the bottom surface of the sliding frame and the top surface near the corner are all designed to be spherical. A fixed frame is fixed at the middle position of the bottom inner wall of the movable groove, and positioning components are provided on the outer walls around the fixed frame and the inner walls around the sliding frame; The bottom of the talar prosthesis is provided with a bottom groove, and the middle of the inner wall of the bottom groove is provided with a fixing piece. The talar prosthesis is provided with a first reinforcement component fixed to the talus.

2. The bionic total ankle replacement prosthesis according to claim 1, characterized in that: The transverse arc length and the longitudinal arc length of the movable groove are both greater than the transverse arc length and the longitudinal arc length of the sliding frame, and the sliding frame and the movable groove are slidably matched.

3. The bionic total ankle replacement prosthesis according to claim 2, characterized in that: The positioning assembly includes guide holes opened around the sliding frame, and the guide holes are connected to the interior of the sliding frame. Guide rods are inserted into the inner walls of the guide holes, and a support frame is fixed to one end of the guide rod. The support frames are distributed around the sliding frame. One side of the support frame is rollingly connected with rolling balls distributed at equal distances, and the rolling balls are attached to the surface of the sliding frame. The other side of the support frame is installed with a memory metal plate on the inner wall of the sliding frame, and the memory metal plate is designed to be continuously bent.

4. The bionic total ankle replacement prosthesis according to claim 3, characterized in that: The first reinforcement component includes a plurality of inclined first fixing holes opened on the talar prosthesis, and the inner walls of the first fixing holes are all plugged with first reinforcement screws, and the tail ends of the first reinforcement screws are screwed and fixed to the talus.

5. The bionic total ankle replacement prosthesis according to claim 4, characterized in that: The second reinforcement component includes connecting grooves arranged on both sides of the bottom of the tibial prosthesis, and connecting plates inserted in the connecting grooves are fixed on both sides of the top of the sliding pad. Second fixing holes that pass through the arc groove and the tibia are opened at both ends of the tibial prosthesis, and a second reinforcement screw is inserted into the inner wall of the second fixing hole. The tail end of the second reinforcement screw is screwed with a nut cover, and through holes are opened on the two connecting plates for the second reinforcement screw to pass through.

6. The bionic total ankle replacement prosthesis according to claim 5, characterized in that: A docking interface is provided in the middle of the top of the sliding pad, and a docking block inserted into the docking interface is fixed in the middle of the bottom of the tibial prosthesis. A plurality of second positioning sockets connected to the mounting groove are provided on both sides of the bottom of the docking interface, and a plurality of second positioning screw grooves are provided on both sides of the top of the sliding frame. Second positioning screws are inserted into the interior of the second positioning sockets, and the second positioning screws are screwed into the second positioning screw grooves.

7. The bionic total ankle replacement prosthesis according to claim 1, characterized in that: A protrusion matched with the talus is fixedly mounted on one end of the talus prosthesis, and a plurality of grooves are arranged on the protrusion.

8. The bionic total ankle replacement prosthesis according to claim 1, characterized in that: The inner wall of the bottom trough is provided with a reinforcement frame, and the reinforcement frame is fixed by a plurality of special-shaped strips staggered horizontally and vertically.

9. The bionic total ankle replacement prosthesis according to claim 1, characterized in that: The fixing part includes a medullary needle attached to the middle of the inner wall of the bottom groove, and a first positioning screw groove is opened in the middle position of the top of the medullary needle, and a first positioning socket connected to the bottom groove is opened in the middle position of the bottom of the movable groove. The inner wall of the first positioning socket is plugged with a first positioning screw, and the first positioning screw is screwed into the first positioning screw groove. The outer wall of the medullary needle is fixed with inclined plates distributed at equal distances, and a first filling groove is opened in the middle of the bottom of the medullary needle. The outer wall of the medullary needle is opened with second filling grooves distributed at equal distances, and the position of the second filling groove is staggered with the position of the inclined plate.

10. The bionic total ankle replacement prosthesis according to claim 1, characterized in that: The fixing part includes a medullary needle attached to the middle of the inner wall of the bottom groove, and a first positioning screw groove is opened in the middle position of the top of the medullary needle, and a first positioning socket connected to the bottom groove is opened in the middle position of the bottom of the movable groove. The inner wall of the first positioning socket is plugged with a first positioning screw, and the first positioning screw is screwed into the first positioning screw groove. A spiral plate is fixed to the outer wall of the medullary needle, and a first filling groove is opened in the middle of the bottom of the medullary needle. A third spiral filling groove is opened on the outer wall of the medullary needle, and the position of the third filling groove is staggered with the position of the spiral plate.

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