Bionic total ankle replacement prosthesis

Abstract

The application provides a bionic total ankle joint replacement prosthesis, and belongs to the technical field of medical devices. The bionic total ankle joint replacement prosthesis comprises a talus prosthesis, a tibia prosthesis and a sliding liner arranged between the talus prosthesis and the tibia prosthesis, and the tibia prosthesis is provided with a second reinforcing component fixed with the tibia and the sliding liner. The top of the tibia prosthesis is provided with a curved groove. The top of the talus prosthesis is movably connected with the bottom of the sliding liner, and the talus prosthesis is fixed on the talus. The bionic total ankle joint replacement prosthesis simulates the natural structure of the human ankle joint, helps to restore the normal movement function of the joint, makes the joint movement more flexible and natural, forms multidirectional movement in front and back, left and right and other directions, realizes the functions of varus, valgus, internal rotation, external rotation and movement in other directions of the whole bionic total ankle joint replacement prosthesis, improves the movement range of the whole bionic total ankle joint replacement prosthesis, forms multidirectional bionic functions, and meets the diversified needs of patients in daily life.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, more particularly, to a bionic total ankle joint replacement prosthesis. BACKGROUND

[0002] As an important weight-bearing joint of the human body, the ankle joint bears the weight of the body and participates in activities such as walking and running. When the ankle joint is severely damaged due to trauma, arthritis, etc., total ankle joint replacement is an effective treatment, which is a surgery to replace the damaged ankle joint with an artificial joint, which is usually made of metal or plastic.

[0003] According to the search, a primary total ankle joint prosthesis with publication number CN111920551A includes a tibial prosthesis and a talus prosthesis, and a sliding liner arranged between the tibial prosthesis and the talus prosthesis. The upper end of the tibial prosthesis forms an anti-shaking component connected with the tibia, and the lower end is connected with the sliding liner. The upper end of the talus prosthesis is movably connected with the sliding liner, and the lower end is fixed in the talus. The anti-shaking component includes a square boss on the upper end of the tibial prosthesis, and the cross section of the square boss gradually decreases from top to bottom, and the longitudinal section gradually decreases from front to back. The present application connects the square boss of the tibial prosthesis with the tibia, increases the contact area between the tibial prosthesis and the tibia, improves the stability of the total ankle joint prosthesis implant, and according to the shape of the square boss, the stress of the ankle joint movement makes the square boss and the groove fit tightly, prevents the total ankle joint prosthesis from loosening and falling out, prolongs the service life of the total ankle joint prosthesis, and avoids more harm to patients from reoperation.

[0004] Combining the above-mentioned patent, it is found that the existing total ankle joint replacement prosthesis has certain deficiencies: the cooperation of the sliding guide rail provided on the talus prosthesis and the sliding liner only realizes the function of forward and backward movement, i.e. the function of varus and valgus, and cannot realize the function of internal rotation, external rotation and other directions, so that the activity of the entire bionic total ankle joint replacement prosthesis is limited, which cannot provide bionic function in multiple directions and cannot meet the diversified needs of patients in daily life. Therefore, it is urgent to design a bionic total ankle joint replacement prosthesis to solve the above problems. SUMMARY

[0005] In view of the problem in the prior art that the activity of the bionic total ankle joint replacement prosthesis is limited, which cannot provide bionic function in multiple directions and cannot meet the diversified needs of patients in daily life, the purpose of the present application is to provide a bionic total ankle joint replacement prosthesis.

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

[0007] The application discloses a bionic total ankle joint replacement prosthesis which comprises a talus prosthesis, a tibia prosthesis and a sliding liner arranged between the talus prosthesis and the tibia prosthesis, and a second reinforcing assembly arranged on the tibia prosthesis and fixed with the tibia and the sliding liner, wherein the top of the tibia prosthesis is provided with a curved groove, the top of the talus prosthesis is movably matched with the bottom of the sliding liner, and the talus prosthesis is fixed on the talus.

[0008] The top surface of the talus prosthesis is designed as a concave spherical groove, the bottom surface of the sliding liner is designed as a convex spherical surface, the bottom surface of the sliding liner is matched with the top surface of the talus prosthesis, a movable groove is arranged in the middle of the spherical groove, a mounting groove is arranged in the middle of the bottom of the sliding liner, a sliding frame is arranged on the inner wall of the mounting groove, the sliding frame and the lateral cross section of the movable groove are designed as inverted T shapes, and the bottom surface of the movable groove, the top of the inner wall near the middle and the bottom surface of the sliding frame and the top near the corner are all designed as spherical surfaces.

[0009] A fixing frame is arranged at the middle of the inner wall of the bottom of the movable groove, and the outer wall of the fixing frame and the inner wall of the sliding frame are both provided with a positioning assembly.

[0010] The bottom of the talus prosthesis is provided with a bottom groove, the middle of the inner wall of the bottom groove is provided with a fixing member, and the talus prosthesis is provided with a first reinforcing assembly fixed with the talus.

[0011] Optionally, the lateral arc length and the longitudinal arc length of the movable groove are greater than the lateral 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 assembly comprises guide holes arranged around the sliding frame and in communication with the inner part of the sliding frame, guide rods are inserted into the inner wall of the guide holes, one end of each guide rod is fixed with a supporting frame, the supporting frames are distributed around the sliding frame, one side of each supporting frame is rotatably connected with equidistantly distributed rolling balls which are attached to the surface of the sliding frame, and the other side of each supporting frame is provided with a memory metal plate which is mounted on the inner wall of the sliding frame and is designed as a continuous bending shape.

[0013] Optionally, the first reinforcing assembly comprises a plurality of first fixing holes arranged on the talus prosthesis in an inclined manner, first reinforcing screws are inserted into the inner wall of the first fixing holes, and the tail end of each first reinforcing screw is screwed and fixed with the talus.

[0014] Optionally, the second reinforcing assembly comprises connecting grooves arranged on both sides of the bottom of the tibial prosthesis, and connecting plates are fixed on both sides of the top of the sliding liner and are inserted into the connecting grooves, second fixing holes are arranged in both ends of the tibial prosthesis and penetrate the arcuate slot and the tibia, second reinforcing screws are inserted into the inner walls of the second fixing holes, and nuts are screwed on the tail ends of the second reinforcing screws, and the two connecting plates are provided with through holes through which the second reinforcing screws pass.

[0015] Optionally, the top of the sliding liner is provided with a docking interface, and a docking block is fixed in the middle of the bottom of the tibial prosthesis and is inserted into the docking interface, second positioning jack holes are arranged on both sides of the bottom of the docking interface and are in communication with the mounting grooves, and second positioning screw grooves are arranged on both sides of the top of the sliding frame, second positioning screws are inserted into the second positioning jack holes, and the second positioning screws are screwed with the second positioning screw grooves.

[0016] Optionally, one end of the talus prosthesis is fixedly provided with a protrusion matched with the talus, and a plurality of recesses are arranged on the protrusion.

[0017] Optionally, the inner wall of the bottom groove is provided with a reinforcing frame, and the reinforcing frame is fixedly composed of a plurality of cross-shaped special-shaped strips.

[0018] Optionally, the fixing member comprises a marrow needle which is attached to the middle of the inner wall of the bottom groove, a first positioning screw groove is arranged in the middle of the top of the marrow needle, a first positioning jack hole which is in communication with the bottom groove is arranged in the middle of the bottom of the movable slot, a first positioning screw is inserted into the inner wall of the first positioning jack hole, and the first positioning screw is screwed with the first positioning screw groove, the outer wall of the marrow needle is fixedly provided with a plurality of inclined plates which are distributed at equal distances, a first filling groove is arranged in the middle of the bottom of the marrow needle, a plurality of second filling grooves are arranged on the outer wall of the marrow needle and are distributed at equal distances, and the positions of the second filling grooves are staggered with the positions of the inclined plates.

[0019] Optionally, the fixing member comprises a marrow needle which is attached to the middle of the inner wall of the bottom groove, a first positioning screw groove is arranged in the middle of the top of the marrow needle, a first positioning jack hole which is in communication with the bottom groove is arranged in the middle of the bottom of the movable slot, a first positioning screw is inserted into the inner wall of the first positioning jack hole, and the first positioning screw is screwed with the first positioning screw groove, the outer wall of the marrow needle is fixedly provided with a plurality of inclined plates which are distributed at equal distances, a first filling groove is arranged in the middle of the bottom of the marrow needle, a plurality of second filling grooves are arranged on the outer wall of the marrow needle and are distributed at equal distances, and the positions of the second filling grooves are staggered with the positions of the inclined plates.

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

[0021] In the above scheme, the top surface of the talus prosthesis is designed as a concave spherical groove, the bottom surface of the sliding liner is designed as a convex spherical shape, and the two are matched, and the arc groove provided 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, makes the joint movement more flexible and natural, and cooperates with the sliding frame to move in the activity groove in a spherical manner, so that the tibia drives the sliding frame, the sliding liner and the tibial prosthesis to move in multiple directions during activity, realizes the functions of varus, valgus, internal rotation, external rotation and other direction activities of the entire bionic total ankle joint, improves the activity range of the entire bionic total ankle joint replacement prosthesis, forms multi-directional bionic function, and meets the diversification needs of patients in daily life.

[0022] Through the inverted T-shaped design of the activity groove and the sliding frame and the sliding cooperation therebetween, not only the displacement of the sliding liner in the transverse and longitudinal directions is limited, but also the force in each direction is borne to some extent, the stability of the joint prosthesis is enhanced, and under the action of the second reinforcing assembly, the sliding liner, the tibial prosthesis and the tibia are fixed at the same time, the connection stability between the sliding liner and the tibial prosthesis and the tibia is further improved, the sliding liner is prevented from shifting or shaking during use, and the sliding liner is also convenient to disassemble and assemble at the same time.

[0023] The positioning assembly provided on the inner wall around the sliding frame and the outer wall around the fixed frame can limit the activity range of the sliding frame, so as to avoid the problem that the activity range of the sliding frame, the sliding liner and the tibial prosthesis is too large to cause ankle joint injury; under the action of the memory metal plate, the memory of the memory metal plate simulates the stress during ankle joint activity, and the memory metal plate is self-adaptively adjusted according to the joint movement state, so as to further improve the bionic performance of the entire total ankle joint replacement prosthesis.

[0024] The convexity and the groove at one end of the talus prosthesis can better match the shape of the talus, enhance the fit and adaptability of the talus prosthesis and the talus, and by filling the bone cement in the filling groove, cooperating with the marrow needles and inclined plates in the reinforcing frame and the fixing piece, the contact area with the talus is increased, the fixing effect is improved, space is provided for bone tissue ingrowth, the integration of the prosthesis and the bone tissue is promoted, and the stability and long-term use effect of the prosthesis are improved. BRIEF DESCRIPTION OF DRAWINGS

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

[0026] Figure 1 is a perspective view of the present application;

[0027] Figure 2 is a front view of the present application;

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

[0029] Figure 4 is a schematic view of the docking block and connecting groove structure of the present application;

[0030] Figure 5 is a schematic view of the mounting groove and perforation structure of the present application;

[0031] Figure 6 is a schematic view of the docking interface and second positioning screw structure of the present application;

[0032] Figure 7 is a schematic view of the spherical groove and sliding frame structure of the present application;

[0033] Figure 8 is a sectional view of the talus prosthesis of the present application;

[0034] Figure 9 is a schematic view of the sliding frame and memory metal plate structure of the present application;

[0035] Figure 10 is a bottom view of the talus prosthesis of the present application;

[0036] Figure 11 is a schematic view of the reinforcing frame structure of the present application;

[0037] Figure 12 is a schematic view of the intramedullary nail structure of the present application;

[0038] Figure 13 is a schematic view of the intramedullary nail structure of the present application;

[0039] Figure 14 is a schematic view of the spiral plate structure of the present application.

[0040] [REFERENCE NUMERALS]

[0041] 1, talus prosthesis; 2, sliding liner; 3, first reinforcing screw; 4, tibia prosthesis; 5, second fixing hole; 6, second reinforcing screw; 7, arcuate groove; 8, protrusion; 9, bottom groove;

[0042] 10, fixing member; 101, intramedullary nail; 102, first filling groove; 103, inclined plate; 104, second filling groove; 105, spiral plate; 106, third filling groove;

[0043] 11, reinforcing frame; 12, sliding frame; 13, connecting plate; 14, docking interface; 15, docking block; 16, fixing frame;

[0044] 17, positioning assembly; 171, guide rod; 172, memory metal plate; 173, support frame; 174, rolling ball;

[0045] 18, movable slot; 19, recess; 20, first positioning screw; 21, nut cover; 22, connecting slot; 23, through hole; 24, mounting slot; 25, second positioning jack; 26, second positioning screw; 27, spherical slot; 28, first fixing hole; 29, first positioning jack; 30, second positioning screw slot; 31, first positioning screw slot.

[0046] As shown in the drawings, in order to clearly show the structure of the embodiments of the present application, specific structures and devices are marked in the drawings, but this is only for the need of illustration, and is not intended to limit the present application to the specific structures, devices and environments, and those skilled in the art can adjust or modify these devices and environments according to specific needs. DETAILED DESCRIPTION

[0047] The present application will be described in detail below with reference to the drawings and specific embodiments. It should be noted here that in order to make the embodiments more detailed, the following embodiments are the best, preferred embodiments, and other alternative ways can also be implemented by those skilled in the art for some known technologies; and the drawings are only used to more specifically describe the embodiments, and are not intended to specifically limit the present application.

[0048] It should be noted that in the specification, "one embodiment", "embodiment", "exemplary embodiment", "some embodiments" and the like indicate that the described embodiments can include a specific feature, structure or property, but not necessarily every embodiment includes the specific feature, structure or property. In addition, when a specific feature, structure or property is described in combination with an embodiment, it should be within the knowledge of those skilled in the art to realize this feature, structure or property in combination with other embodiments (whether or not explicitly described).

[0049] Generally, the terms can be understood at least in part from the context in which they are used. 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 or can be used to describe combinations of features, structures, or characteristics, in the plural, without necessarily forcing a single feature, structure, or characteristic to exist. In addition, the term "based on" can be understood as not necessarily of a set of exclusive factors, but instead, can allow for existence of additional factors not explicitly described, again, depending at least in part on the context.

[0050] It can be understood that the meaning of "on", "above" and "over" in the present application should be interpreted in the broadest way, so that "on" not only means "directly on" something, but also includes the meaning of "on" something with intervening features or layers therebetween, and "above" or "over" not only means the meaning of "above" or "over" something, but also can include the meaning of "above" or "over" something without intervening features or layers therebetween.

[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 provided with the sliding frame 12, the lateral cross section of the sliding frame 12 and the movable groove 18 are designed in inverted T shape, the bottom surface and the inner wall top near the middle of the movable groove 18 and the bottom surface and the top near the corner of the sliding frame 12 are designed in spherical shape, the lateral arc length and the longitudinal arc length of the movable groove 18 are greater than the lateral arc length and the longitudinal arc length of the sliding frame 12, and the sliding frame 12 and the movable groove 18 are in sliding fit. By designing the spherical groove 27 recessed from the top surface of the talus prosthesis 1, the bottom surface of the sliding liner 2 is designed in convex spherical shape, and the two are matched, and the arc surface groove 7 is arranged on the top of the tibial prosthesis 4, which simulates the natural structure of the human ankle joint, helps to restore the normal movement function of the joint, makes the joint movement more flexible and natural, and cooperates with the sliding frame 12 to move in the movable groove 18 in a spherical manner, so that the tibia drives the sliding frame 12, the sliding liner 2 and the tibial prosthesis 4 to move in multiple directions such as forward, backward, left, right and other directions during movement, realizes the functions of inversion, eversion, internal rotation, external rotation and other direction movement of the entire bionic total ankle joint, improves the movement range of the entire bionic total ankle joint replacement prosthesis, forms a multi-directional bionic function, and meets the diversification needs of patients in daily life;

[0055] As shown in Figure 2 , the inner wall of the bottom of the movable groove 18 is fixed with the fixed frame 16 at the middle position, and the outer wall of the fixed frame 16 is provided with the positioning assembly 17 between the four surrounding inner walls of the sliding frame 12. The positioning assembly 17 comprises guide holes opened in the four surrounding sliding frames 12, and the guide holes are in communication with the inside of the sliding frame 12, and the inner wall of the guide hole is inserted with the guide rod 171. Figure 9 and 10 As shown, one end of the guide rod 171 is fixedly connected with the support frame 173, the support frame 173 is distributed around the sliding frame 12, the other side of the support frame 173 is rollingly connected with the equidistantly distributed rolling balls 174, the rolling balls 174 are attached to the surface of the sliding frame 12, one end of the memory metal plate 172 is connected to the other side of the support frame 173, 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 in continuous bending shape. The above-mentioned positioning assembly 17 can limit the movement range of the sliding frame 12, avoid the problem that the movement range of the sliding frame 12, the sliding liner 2 and the tibial prosthesis 4 is too large to cause ankle joint injury, and under the action of the memory metal plate 172 in the inside thereof, the memory thereof simulates the stress of ankle joint movement, and self-adapts according to the joint movement state, further improving the bionic performance of the entire total ankle joint replacement prosthesis;

[0056] As shown in Figure 2 and Figure 3 , the bottom of the talus prosthesis 1 is provided with a bottom groove 9, and the inner wall of the bottom groove 9 is provided with a fixing part 10 at the middle position, and the talus prosthesis 1 is provided with a first reinforcing assembly fixed with the talus.

[0057] As Figure 1 , Figure 3 , Figure 7 and Figure 8 shown, the first reinforcing assembly includes a plurality of inclined first fixing holes 28 opened on the talus prosthesis 1, and the inner wall of the first fixing hole 28 is inserted with the first reinforcing screw 3, and the tail end of the first reinforcing screw 3 is screwed and fixed with the talus, by opening a plurality of inclined first fixing holes 28 on the talus prosthesis 1, inserting the first reinforcing screw 3 and screwing and fixing with the talus, it is convenient to firmly fix the talus prosthesis 1 on the talus.

[0058] As Figure 1 , Figure 2 , Figure 4 , Figure 6 shown, the second reinforcing assembly includes a connecting groove 22 arranged on both sides of the bottom of the tibial prosthesis 4, and the top of the sliding liner 2 is fixed with the connecting plate 13 inserted into the connecting groove 22, both ends of the tibial prosthesis 4 are provided with the second fixing hole 5 penetrating the arcuate groove 7 and the tibia, and the inner wall of the second fixing hole 5 is inserted with the second reinforcing screw 6, the tail end of the second reinforcing screw 6 is screwed with the nut cover 21, and the two connecting plates 13 are provided with the perforation 23 for the second reinforcing screw 6 to pass through, and the second reinforcing screw 6, the first reinforcing screw 3 and the nut cover 21 are made of decomposable material, such as Figures 1-6 , by cooperating the connecting groove 22 on both sides of the bottom of the tibial prosthesis 4 with the connecting plate 13 on both sides of the top of the sliding liner 2, and opening the second fixing hole 5 penetrating the arcuate groove 7 at both ends of the tibial prosthesis 4, inserting the second reinforcing screw 6, passing through the perforation 23, and fixing through the nut cover 21, it is convenient to firmly connect the tibial prosthesis 4, the sliding liner 2 and the tibia, and through the sliding liner 2 made of polyethylene material, it has good wear resistance and flexibility, which can play a buffering and sliding role between the talus prosthesis 1 and the tibial prosthesis 4, and the talus prosthesis 1 and the tibial prosthesis 4 made of titanium alloy material have high strength and good biocompatibility, which can bear the weight of the human body and the stress during joint movement.

[0059] As Figures 2-6 shown, the top of the sliding liner 2 is provided with a docking port 14, and the bottom of the tibial prosthesis 4 is fixed with a docking block 15 inserted into the docking port 14, and the bottom of the docking port 14 is provided with a plurality of second positioning jack 25 communicated with the mounting groove 24, such as Figure 9As shown, the top of the sliding frame 12 is provided with a plurality of second positioning screw grooves 30 on both sides, the second positioning screw 26 is inserted into the second positioning screw hole 25, the second positioning screw 26 is screwed with the second positioning screw groove 30, the docking interface 14 on the top of the sliding liner 2 is inserted into the docking block 15 on the bottom of the tibial prosthesis 4, and then the second positioning screw 26 is used to fix the sliding frame 12 and the docking interface 14, thereby enhancing the connection stability between the sliding frame 12 and the sliding liner 2.

[0060] As shown in Figure 2 , Figure 11 and Figure 12 , the talar prosthesis 1 is fixedly installed with a protrusion 8 matched with the talus, and a plurality of grooves 19 are arranged on the protrusion 8, the inner wall of the bottom groove 9 is provided with a reinforcing frame 11, and the reinforcing frame 11 is fixedly composed of a plurality of transversely and longitudinally staggered special-shaped strips. The above-mentioned grooves 19 and reinforcing frame 11 have more contact points and contact surfaces with the surrounding bone or soft tissue, thereby improving the stability.

[0061] As shown in Figure 2 , Figure 3 , Figure 8 , Figure 11 , Figure 12 and Figure 13 , the fixing member 10 includes a marrow needle 101 attached to the inner wall of the bottom groove 9, a first positioning screw groove 31 is formed in the top middle position of the marrow needle 101, a first positioning screw hole 29 is formed in the bottom middle position of the movable groove 18 and communicated with the bottom groove 9, a first positioning screw 20 is inserted into the inner wall of the first positioning screw hole 29, and the first positioning screw 20 is screwed with the first positioning screw groove 31. The outer wall of the marrow needle 101 is fixedly provided with equidistantly distributed inclined plates 103, a first filling groove 102 is formed in the bottom middle position of the marrow needle 101, equidistantly distributed second filling grooves 104 are formed in the outer wall of the marrow needle 101, the positions of the second filling grooves 104 are staggered with the positions of the inclined plates 103. The inclined plates 103 increase the contact area and friction force between the fixing member 10 and the surrounding bone tissue, which is beneficial to better fixing in the bone and preventing the angle change of the fixing member 10 and even the talar prosthesis 1. Under the action of the first positioning screw 20 and the first positioning screw groove 31, the fixing member 10 has the performance of convenient disassembly and assembly, which facilitates the replacement of the fixing member 10.

[0062] Example 2

[0063] Referring to Figure 14Compared with embodiment 1, the fixing part 10 comprises a marrow needle 101 attached to the middle of the inner wall of the bottom groove 9, a first positioning screw groove 31 is formed in the middle of the top of the marrow needle 101, a first positioning insertion hole 29 is formed in the middle of the bottom of the movable groove 18 and is communicated with the bottom groove 9, a first positioning screw 20 is inserted into the inner wall of the first positioning insertion hole 29, the first positioning screw 20 is screwed with the first positioning screw groove 31, a spiral plate 105 is fixed to the outer wall of the marrow needle 101, a first filling groove 102 is formed in the middle of the bottom of the marrow needle 101, and a third filling groove 106 is formed in the outer wall of the marrow needle 101 in a spiral shape, the position of the third filling groove 106 is staggered with the position of the spiral plate 105, the spiral plate 105 is used, the contact area and friction force between the fixing part 10 and the surrounding bone tissue are increased in a spiral manner, which is beneficial to better fixing in the bone and preventing the angle change of the fixing part 10 and even the talus prosthesis 1.

[0064] The working process of the technical scheme provided by the application is as follows:

[0065] By forming a plurality of inclined first fixing holes 28 on the talus prosthesis 1, inserting the first reinforcing screw 3 and screwing it with the talus, the talus prosthesis 1 is firmly fixed on the talus, by matching the connecting grooves 22 on both sides of the bottom of the tibial prosthesis 4 with the connecting plates 13 on both sides of the top of the sliding liner 2, and by forming second fixing holes 5 penetrating the arc-shaped grooves 7 on both ends of the tibial prosthesis 4, inserting the second reinforcing screw 6, passing through the perforations 23 on the connecting plates 13, and fixing it by the screw cap 21, the tibial prosthesis 4, the sliding liner 2 and the tibia are firmly connected, in addition, the sliding frame 12 is fixed on the sliding liner 2 by the second positioning screw 26, and the fixing part 10 is fixed in the bottom groove 9 by the first positioning screw 20, cooperating with the reinforcing frame 11, various textures are designed on the joint surface and the bone contact surface to increase the roughness of the surface and increase the contact area, so that the talus prosthesis 1 is better fixed in the bone, the filling grooves on the marrow needle 101 can be filled with bone cement and other materials after implantation, further enhancing the fixing effect;

[0066] Because the transverse arc length and the longitudinal arc length of the movable groove 18 are greater than the transverse arc length and the 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 drives the sliding frame 12, the sliding liner 2 and the tibial prosthesis 4 to move in multiple directions such as forward and backward, left and right, and other directions during the movement, realizing the functions of inversion, eversion, internal rotation, external rotation and other direction movement of the entire bionic total ankle joint, and under the action of the memory metal plate 172, the memory force simulates the stress of the ankle joint during movement, and adjusts adaptively according to the joint movement state, further improving the bionic performance of the entire total ankle joint replacement prosthesis.

[0067] The present application encompasses any alternatives, modifications, equivalent methods and solutions made to the essence and scope of the present application. In order to make the public have a thorough understanding of the present application, specific details are described in the following preferred embodiments of the present application, and the present application can also be fully understood without the description of these details to those skilled in the art. In addition, in order to avoid unnecessary confusion to the essence of the present application, well-known methods, processes, procedures, elements and circuits, etc. are not described in detail.

[0068] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can also be made, which should be considered as the protection scope of the present application.

Claims

1. A bionic total ankle joint replacement prosthesis, characterized in that, The application relates to a talar prosthesis and a tibial prosthesis and a sliding liner arranged between the talar prosthesis and the tibial prosthesis, wherein a second reinforcing assembly is arranged on the tibial prosthesis and is fixed to the tibia and the sliding liner, and an arc-shaped groove is arranged on the top of the tibial prosthesis; the top of the talar prosthesis is movably connected to the bottom of the sliding liner, and the talar prosthesis is fixed to the talar bone. The top of the talar prosthesis is designed as a concave spherical groove, the bottom of the sliding liner is designed as a convex spherical surface, the bottom of the sliding liner is matched with the top of the talar prosthesis, a movable groove is arranged in the middle of the spherical groove, an installation groove is arranged in the middle of the bottom of the sliding liner, a sliding frame is arranged on the inner wall of the installation groove, the movable groove and the sliding frame are designed as inverted T-shaped in lateral cross section, and the bottom of the movable groove, the inner wall top near the middle of the movable groove, the bottom of the sliding frame and the top near the corner of the sliding frame are all designed as spherical surfaces. A fixed frame is arranged on the inner wall of the bottom of the movable groove, and the outer wall of the fixed frame and the inner wall of the sliding frame are both provided with a positioning assembly. A bottom groove is arranged on the bottom of the talar prosthesis, a fixing member is arranged on the inner wall of the middle of the bottom groove, and a first reinforcing assembly is arranged on the talar prosthesis and is fixed to the talar bone. The lateral arc length and the longitudinal arc length of the movable groove are greater than the lateral arc length and the longitudinal arc length of the sliding frame, and the sliding frame and the movable groove are movably connected. The positioning assembly comprises guide holes arranged on the four sides of the sliding frame and communicated with the inner part of the sliding frame, guide rods are inserted into the inner walls of the guide holes, support frames are arranged on one end of the guide rods, the support frames are distributed on the four sides of the sliding frame, a plurality of equidistantly distributed rolling balls are rollingly connected to one side of the support frames and are matched with the surface of the sliding frame, memory metal plates are arranged on the other side of the support frames and the inner wall of the sliding frame, and the memory metal plates are designed as continuously bent plates. The first reinforcing assembly comprises a plurality of first fixing holes arranged on the talar prosthesis and designed as inclined surfaces, first reinforcing screws are inserted into the inner walls of the first fixing holes, and the tail ends of the first reinforcing screws are screwed to the talar bone. The second reinforcing assembly comprises connecting grooves arranged on the two sides of the bottom of the tibial prosthesis, connecting plates are arranged on the two sides of the top of the sliding liner and are inserted into the connecting grooves, second fixing holes are arranged on the two ends of the tibial prosthesis and penetrate through the arc-shaped groove and the tibia, second reinforcing screws are inserted into the inner walls of the second fixing holes, screw caps are screwed to the tail ends of the second reinforcing screws, and a plurality of through holes are arranged on the two connecting plates and are communicated with the installation groove.

2. The bionic total ankle joint replacement prosthesis according to claim 1, characterized in that, A butt joint is arranged on the middle of the top of the sliding liner, a butt joint block is arranged on the middle of the bottom of the tibial prosthesis and is inserted into the butt joint, a plurality of second positioning insertion holes are arranged on the two sides of the bottom of the butt joint and are communicated with the installation groove, a plurality of second positioning screw grooves are arranged on the two sides of the top of the sliding frame, second positioning screws are inserted into the second positioning insertion holes, and the second positioning screws are screwed into the second positioning screw grooves.

3. The prosthetic total ankle joint according to claim 1, wherein, One end of the talar prosthesis is fixedly connected to a protrusion matched with the talar bone, and a plurality of grooves are arranged on the protrusion.

4. The prosthetic total ankle replacement of claim 1, wherein, The inner wall of the bottom groove is provided with a reinforcing frame which is composed of a plurality of crosswise and lengthwise staggered special-shaped strips.

5. The prosthetic total ankle replacement of claim 1, wherein, The fixing member comprises a pin which is attached to the middle of the inner wall of the bottom groove, and a first positioning screw groove is formed in the middle of the top of the pin, a first positioning insertion hole which is in communication with the bottom groove is formed in the middle of the bottom of the movable groove, a first positioning screw is inserted into the inner wall of the first positioning insertion hole, the first positioning screw is screwed with the first positioning screw groove, the outer wall of the pin is fixed with a plurality of equidistantly distributed inclined plates, a first filling groove is formed in the middle of the bottom of the pin, and a plurality of equidistantly distributed second filling grooves are formed in the outer wall of the pin, the positions of the second filling grooves being staggered with the positions of the inclined plates.

6. The prosthetic total ankle replacement of claim 1, wherein, The fixing member comprises a pin which is attached to the middle of the inner wall of the bottom groove, and a first positioning screw groove is formed in the middle of the top of the pin, a first positioning insertion hole which is in communication with the bottom groove is formed in the middle of the bottom of the movable groove, a first positioning screw is inserted into the inner wall of the first positioning insertion hole, the first positioning screw is screwed with the first positioning screw groove, the outer wall of the pin is fixed with a plurality of equidistantly distributed inclined plates, a first filling groove is formed in the middle of the bottom of the pin, and a plurality of equidistantly distributed second filling grooves are formed in the outer wall of the pin, the positions of the second filling grooves being staggered with the positions of the inclined plates.

Images