An implant for ankle arthroplasty surgery

Abstract

The application provides an ankle joint replacement surgery implant device and belongs to the ankle joint replacement surgery implant device field. The device comprises a tibia assembly and a polyethylene insert arranged and installed at the lower end of the tibia assembly. The upper end and the lower end of the tibia assembly are both provided with a plurality of triangular grooves, and the upper end of the polyethylene insert is provided with a plurality of triangular rods. The cooperation of the marrow bone nail, the tibia, the driving rod, the inclined groove, the cross inclined plate, the trapezoidal block, the sliding groove and the displacement box makes the trapezoidal block contact with the tibia, thereby increasing the friction between the marrow bone nail and the tibia, strengthening the stability of the tibia assembly in the human body, avoiding the loosening of the tibia assembly in long-time movement, thereby affecting the daily life of the patient, further improving the service life of the implant device, and avoiding the shaking of the driving rod in the human body in the process of walking or movement under the cooperation of the driving rod, the chamber, the polyethylene insert, the tibia assembly and the clamping groove.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of ankle replacement surgery implanters, more particularly, to an ankle replacement surgery implanter. BACKGROUND

[0002] The ankle replacement surgery implanter is an artificial prosthesis used to replace the diseased or damaged ankle joint, aiming to relieve pain, correct deformity and restore the normal function of the ankle joint, including a tibial component, a polyethylene insert and a flat-cut talar component. Ankle replacement surgery refers to a surgical method of removing part of the diseased ankle joint and implanting a prosthesis into the body to replace the original ankle joint function, in order to relieve pain and improve patient function. It is generally used for rheumatoid arthritis, ankle osteoarthritis, traumatic arthritis and other end-stage diseases, joint swelling, pain and inability to move. It is a kind of ultimate treatment method, which requires the shape and function of the patient's talar bone to be good.

[0003] The service life of the existing ankle replacement surgery implanter is about 5-10 years, and the service life of the patient with osteoporosis may be reduced. Moreover, the implanter is in the tibia for a long time, which will increase the friction between the medullary bone nail and the tibia during the patient's movement, thereby increasing the wear of the tibia, causing the loosening of the tibial component, and in severe cases, even causing the tibial component to fall off, which will greatly affect the patient's daily life and indirectly reduce the service life of the ankle replacement surgery implanter. SUMMARY

[0004] In view of the above problems in the prior art, the service life of the patient with osteoporosis may be reduced, and the implanter is in the tibia for a long time, which will increase the friction between the medullary bone nail and the tibia during the patient's movement, thereby increasing the wear of the tibia, causing the loosening of the tibial component, and in severe cases, even causing the tibial component to fall off, which will greatly affect the patient's daily life and indirectly reduce the service life of the ankle replacement surgery implanter. The purpose of the present application is to provide an ankle replacement surgery implanter.

[0005] To solve the above problems, the technical scheme adopted by the present application is as follows.

[0006] The utility model provides an implant for ankle replacement surgery, including tibial component and the polyethylene insert of setting installation tibial component lower extreme, the upper end and the lower end of tibial component are all set up with a plurality of triangle groove, the triangle groove of upper end can improve the friction between tibial component and tibia, the triangle groove of lower end can improve the occlusion between polyethylene insert and tibial component, the upper end of polyethylene insert is provided with a plurality of triangle rod, and triangle rod just coincides with triangle groove, and the occlusion of tibial component and polyethylene insert is increased, the lower end of polyethylene insert is provided with the horizontal cutting talus component, the tibial component is set up with three fixed slots, three fixed slots are all fixedly installed with marrow bone nail, the tibial component is provided with the displacement component of increasing marrow bone nail and tibia friction, the tibial component is provided with the drive assembly of driving displacement component, the marrow bone nail is provided with the pushover component of increasing the contact area of displacement component and tibia, pushover component can increase the contact area of displacement component and tibia, thereby further increase the friction of marrow bone nail and tibia, the fixed slot is provided with the tamponade component of preventing marrow bone nail from loosening and causing the wear of tibia periphery to long -time use, the drive assembly is provided with the clamping assembly of enhancing the occlusion between tibial component and polyethylene insert.

[0007] Optionally, the displacement component includes a plurality of fixing holes formed on the axial sidewall of the marrow bone nail, a plurality of the fixing holes are fixedly installed with displacement boxes, the displacement boxes are provided with sliding grooves, the sliding grooves are slidably installed with trapezoidal blocks, and the marrow bone nail is provided with a cavity.

[0008] Optionally, the drive assembly includes three inclined grooves formed on the tibial component, three the inclined grooves are slidably installed with drive rods, one end of the drive rod is fixedly installed with a cross inclined plate, and the polyethylene insert is provided with three clamping grooves.

[0009] Optionally, the tamponade component includes a mounting box fixedly installed on the fixed slot, the mounting box is fixedly connected with the marrow bone nail, the mounting box is provided with a circular sliding rail, the circular sliding rail is slidably installed with a tamponade block, and a plurality of nickel-titanium alloy springs are arranged between the tamponade block and the circular sliding rail.

[0010] Optionally, the pushover component includes a first mounting groove formed on the trapezoidal block, the first mounting groove is fixedly installed with two sliding rails, two the sliding rails are slidably installed with displacement blocks, one end of the trapezoidal block is provided with a moving groove, and the moving groove is slidably installed with a pressing block.

[0011] Optionally, the clamping assembly includes a limiting groove formed on the polyethylene insert, the drive rod is provided with a cavity, the cavity is slidably installed with an arc-shaped block, and a second spring is arranged between the arc-shaped block and the cavity.

[0012] Optionally, the inclined surface of the trapezoidal block corresponds to the inclined surface of the cross-shaped inclined plate.

[0013] Optionally, the length of the driving rod is greater than the distance from the inclined groove to the end of the medullary bone nail, and the driving rod and the medullary bone nail are coaxially arranged.

[0014] Optionally, the filling block is in contact with the outer wall of the medullary bone nail.

[0015] Optionally, the displacement of the three clamping grooves coincides with the positions of the three inclined grooves, and the size of the clamping groove matches the size of the driving rod.

[0016] Compared with the prior art, the technical scheme provided by the present application has at least the following beneficial effects:

[0017] In the above scheme, the trapezoidal block is in contact with the tibia under the cooperation of the medullary bone nail, the tibia, the driving rod, the inclined groove, the cross-shaped inclined plate, the trapezoidal block, the sliding groove and the displacement box, thereby increasing the friction between the medullary bone nail and the tibia and strengthening the stability of the tibia assembly in the human body, avoiding the loosening of the tibia assembly during long-term exercise, thereby affecting the daily life of the patient, and further improving the service life of the implant.

[0018] Under the cooperation of the trapezoidal block, the sliding groove and the pressing block, the tibia exerts pressure on the pressing block, so that the pressing block enters the first mounting groove, at this time, the pressing block extrudes the two displacement blocks, so that the two displacement blocks move outward through the sliding rail, thereby increasing the contact area between the trapezoidal block and the tibia, indirectly increasing the friction between the medullary bone nail and the tibia, and improving the service life of the implant.

[0019] Under the cooperation of the driving rod, the clamping groove, the arc-shaped block, the cavity, the second spring and the limiting groove, the driving rod can be limited, and the connectivity between the tibia assembly and the polyethylene insert is also increased, thereby indirectly improving the service life of the implant. BRIEF DESCRIPTION OF DRAWINGS

[0020] 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.

[0021] Figure 1 is a schematic view of the three-dimensional structure of the present application;

[0022] Figure 2 is a partial cross-sectional view of the clamping assembly of the present application

[0023] Figure 3Transverse sectional view of displacement assembly of the present application;

[0024] Figure 4 Partial sectional view of displacement assembly of the present application;

[0025] Figure 5 Vertical sectional view of displacement assembly of the present application;

[0026] Figure 6 Schematic perspective view of driving assembly of the present application;

[0027] Figure 7 Schematic perspective view of clamping assembly of the present application;

[0028] Figure 8 Schematic perspective view of Figure 7 Enlarged view of A of the present application;

[0029] Figure 9 Sectional view of push-through assembly of the present application;

[0030] Figure 10 Sectional view of packing assembly of the present application;

[0031] Figure 11 Partial sectional view of packing assembly of the present application.

[0032] [Reference signs]

[0033] 1. TIBIAL COMPONENT; 11. Polyethylene insert; 12. FLAT CUT TALUS COMPONENT; 13. TRIANGULAR SLOT; 14. TRIANGULAR ROD;

[0034] 2. DISPLACEMENT ASSEMBLY; 21. FIXING SLOT; 22. CANNULATED BONE SCREW; 23. FIXING HOLE; 24. DISPLACEMENT BOX; 25. SLIDING SLOT; 26. TRAPEZOIDAL BLOCK; 27. CHAMBER;

[0035] 3. DRIVING ASSEMBLY; 31. INCLINED SLOT; 32. DRIVING ROD; 33. CROSS SLIDING PLATE; 34. CLAMPING SLOT;

[0036] 4. PACKING ASSEMBLY; 41. MOUNTING BOX; 42. CIRCULAR SLIDING RAIL; 43. PACKING BLOCK; 44. NICKEL-TITANIUM ALLOY SPRING;

[0037] 5. PUSH-THROUGH ASSEMBLY; 51. FIRST MOUNTING SLOT; 52. SLIDING RAIL; 53. PRESSING BLOCK; 54. DISPLACEMENT BLOCK; 55. MOVING SLOT;

[0038] 6. CLAMPING ASSEMBLY; 61. LIMITING SLOT; 62. CAVITY; 63. ARC BLOCK; 64. SECOND SPRING.

[0039] 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

[0040] The present application will now be described in detail with reference to the accompanying drawings and specific embodiments. It should be noted that the following embodiments are the best, preferred embodiments, and other alternative embodiments 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.

[0041] It should be noted that in the specification, "one embodiment", "embodiment", "exemplary embodiment", "some embodiments" and the like indicate that the described embodiment 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 implement such a feature, structure or property in combination with other embodiments, whether or not it is explicitly described.

[0042] Generally, the terms can be understood at least in part from the context in which they are used. For example, depending 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 dictating whether any such feature, structure, or characteristic is required, desired, or necessary only once, or some multiple thereof. Additionally, the term "based on" can be understood as not necessarily of exclusive alternatives, but rather, allowing for additional implicit factors known to those of ordinary skill in the art to exist in some capacity so as to at least partially underlie a decision, action, or statement.

[0043] 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 characteristics 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 characteristics or layers therebetween.

[0044] Moreover, spatially relative terms, such as "beneath", "below", "lower", "above", "upper" and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. The spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. The devices can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0045] As shown in Figure 1 and Figure 2 The present application provides a kind of ankle replacement surgery implant, a kind of ankle replacement surgery implant, including tibia component 1 and the polyethylene insert 11 of setting installation in tibia component 1 lower end, the upper end and the lower end of the tibia component 1 are all set with several triangular grooves 13, the triangular groove 13 of upper end can improve the friction between tibia component 1 and tibia, the triangular groove 13 of lower end can improve the occlusion between polyethylene insert 11 and tibia component 1.The upper end of the polyethylene insert 11 is provided with several triangular rod 14, triangular rod 14 just with triangular groove 13 match, increase the occlusion of tibia component 1 and polyethylene insert 11, the lower end of the polyethylene insert 11 is provided with flat cutting talus component 12, the recess of polyethylene insert 11 with the convex surface of flat cutting talus component 12 match, can reduce the friction between polyethylene insert 11 and flat cutting talus component 12, flat cutting talus component 12 is matched with the talus of patient, can be well matched with the talus of patient.The tibia component 1 is opened with three fixed grooves 21, three the fixed groove 21 is all fixedly installed with marrow bone nail 22, marrow bone nail 22 can improve the stability of fracture, so as to allow patient to walk in early stage, be favorable to restore joint function and reduce muscle atrophy, and also can reduce the phenomenon of infection.The tibia component 1 is provided with displacement component 2 for increasing the friction of marrow bone nail 22 and tibia, displacement component 2 moves from marrow bone nail 22 to outside, can increase the friction between marrow bone nail 22 and tibia.The tibia component 1 is provided with drive component 3 for driving displacement component 2, drive component 3 can be as the driving source of displacement component 2 and drive displacement component 2 to move, the marrow bone nail 22 is provided with push component 5 for increasing the contact area of displacement component 2 and tibia, push component 5 can increase the contact area of displacement component 2 and tibia, to further increase the friction of marrow bone nail 22 and tibia, the fixed groove 21 is provided with tamponade component 4 for preventing marrow bone nail 22 from loosening due to long time use and causing abrasion to tibia periphery, tamponade component 4 can be filled according to the size of abrasion, can avoid the phenomenon that tibia component 1 is produced and shakes on tibia, the drive component 3 is provided with clamping component 6 for enhancing the occlusion of tibia component 1 and polyethylene insert 11.

[0046] Firstly, the ankle of the patient is injected with anesthetic, then the ankle is detected and fixed by X-ray and measuring device, then the ankle is cut according to the result of X-ray, then the wound is supported to avoid skin loosening during the operation, then the tibia of the patient is cut into a trapezoidal shape, then the tibia mold is placed on the just cut part, then the tibia is punched by the tibia mold, then the talus is cut, then the talus mold is placed on the talus, then the talus is punched, finally the talus assembly 1 is placed on the tibia, the tibia assembly 1 is provided with a plurality of triangular grooves 13 on the surface, which can improve the friction between the tibia assembly 1 and the tibia, thereby reducing the sliding displacement between the tibia assembly 1 and the tibia, at this time the bone marrow nail 22 is placed in the hole on the tibia, thereby being fixed, then the polyethylene insert 11 is placed at the lower end of the tibia assembly 1, the triangular rod 14 on the polyethylene insert 11 is matched with the triangular groove 13, which can increase the occlusal force of the polyethylene insert 11 and the tibia assembly 1, then the flat cutting talus assembly 12 is fixed into the hole on the talus by titanium alloy hollow tension screw, finally the wound is sutured, thereby completing the ankle replacement surgery.

[0047] As shown in Figures 3 to 9 , the displacement assembly 2 comprises a plurality of fixing holes 23 opened on the axial side wall of the bone marrow nail 22, a plurality of fixing holes 23 are fixedly installed with displacement boxes 24, the displacement boxes 24 are provided with sliding grooves 25 (the sliding grooves 25 are through grooves), the sliding grooves 25 are slidably installed with trapezoidal blocks 26, the trapezoidal blocks 26 can be stretched outwards from the sliding grooves 25 under stress, and the bone marrow nail 22 is provided with a cavity 27.

[0048] As shown in Figure 3 and Figure 6 , the driving assembly 3 comprises three inclined grooves 31 opened on the tibia assembly, the three inclined grooves 31 and the driving rod 32 are concentric and coaxial with the bone marrow nail 22, so as to avoid that the inclined grooves 31 affect the route of the driving rod 32 and cause the driving rod 32 to fail to complete the driving work, the three inclined grooves 31 are slidably installed with the driving rod 32, one end of the driving rod 32 is fixedly installed with a cross inclined plate 33, the cross inclined plate 33 corresponds to the four trapezoidal blocks 26, can drive the four trapezoidal blocks 26 to move outward synchronously, so as to contact the tibia, thereby avoiding the phenomenon of stress concentration, and the polyethylene insert 11 is provided with three clamping grooves 34.

[0049] As shown in Figure 9As shown, the pushing assembly 5 comprises a first mounting groove 51 formed on the trapezoidal block 26, two slide rails 52 are fixedly installed on the first mounting groove 51, two displacement blocks 54 are slidingly installed on the two slide rails 52, a moving groove 55 is formed on one end of the trapezoidal block 26, and a pressing block 53 is slidingly installed on the moving groove 55.

[0050] As shown in Figure 2 and Figure 8 As shown, the clamping assembly 6 comprises a limiting groove 61 formed on the polyethylene insert 11, a cavity 62 is formed on the driving rod 32, an arc-shaped block 63 is slidingly installed on the cavity 62, and a second spring 64 is arranged between the arc-shaped block 63 and the cavity 62.

[0051] The inclined surface of the trapezoidal block 26 corresponds to the inclined surface of the cross-shaped inclined plate 33, so that when the cross-shaped inclined plate 33 is in contact with the trapezoidal block 26, the resistance generated by the two can be reduced, thereby smoothly passing the trapezoidal block 26 through the fixed hole 23 to contact the tibia.

[0052] The length of the driving rod 32 is greater than the distance from the inclined groove 31 to the end of the bone marrow nail 22, so that the driving rod 32 can enter the clamping groove 34, thereby limiting the driving rod 32 and avoiding the phenomenon of shaking of the driving rod 32, and the driving rod 32 and the bone marrow nail 22 are concentric and coaxial, avoiding the uneven force on the trapezoidal block 26 caused by the upward displacement of the driving rod 32, thereby causing the uneven force on the outer wall of the bone marrow nail 22 and the formation of concentrated stress on the tibia.

[0053] The displacement of the three clamping grooves 34 coincides with the positions of the three inclined grooves 31, and when the driving rod 32 enters the cavity 27, the trapezoidal blocks 26 are extruded out of the fixed holes 23, at this time, the polyethylene insert 11 is attached to the tibia assembly 1, and at this time, the three clamping grooves 34 limit the driving rod 32, avoiding the shaking of the driving rod 32 when the patient moves, and the size of the clamping groove 34 matches the size of the driving rod 32, so that the clamping groove 34 can well limit the driving rod 32 and prevent the driving rod 32 from shaking in the clamping groove 34.

[0054] When the medullary nail 22 enters the tibia, the driving rod 32 is pressed to slide on the inclined groove 31, because the end of the driving rod 32 is the cross inclined plate 33, the inclined surface of the cross inclined plate 33 matches the inclined surface of the trapezoidal block 26, so that the friction between the cross inclined plate 33 and the trapezoidal block 26 is reduced, thereby the trapezoidal block 26 is moved outward from the displacement box 24 through the sliding groove 25, the trapezoidal block 26 is in contact with the tibia, thereby the friction between the medullary nail 22 and the tibia is increased, the stability of the tibial component 1 in the human body is strengthened, the phenomenon that the tibial component 1 is loose in a long time of movement is avoided, thereby the daily life of the patient is affected, and the service life of the implant is further improved, when the driving rod 32 enters the bottom end of the cavity 27, at this time, the polyethylene insert 11 is placed at the lower end of the tibial component 1, at this time, the three driving rods 32 enter the three clamping grooves 34, the clamping grooves 34 limit the displacement of the driving rods 32, and the phenomenon that the driving rods 32 are shaken in the human body during walking or movement of the patient is avoided.

[0055] When the trapezoidal block 26 moves outward through the sliding groove 25, at this time, the pressing block 53 on the trapezoidal block 26 is in contact with the inside of the tibia, so that the tibia exerts pressure on the pressing block 53, the pressing block 53 enters the first mounting groove 51, at this time, the pressing block 53 extrudes the two displacement blocks 54, the two displacement blocks 54 move outward through the sliding rail 52, thereby the contact area between the trapezoidal block 26 and the tibia is increased, the friction between the medullary nail 22 and the tibia is indirectly increased, and the service life of the implant is improved.

[0056] When the driving rod 32 enters the clamping groove 34, at this time, the clamping groove 34 extrudes the arc-shaped block 63 into the cavity 62, until the arc-shaped block 63 enters the limiting groove 61 through the action of the second spring 64, not only the driving rod 32 is limited, but also the connectivity between the tibial component 1 and the polyethylene insert 11 is increased, thereby the service life of the implant is indirectly improved.

[0057] As shown in Figure 10 and Figure 11 , the filling assembly 4 comprises the mounting box 41 fixedly installed on the fixing groove 21, the mounting box 41 is fixedly connected with the medullary nail 22, a circular sliding rail 42 is formed in the mounting box 41, a filling block 43 is slidably installed on the circular sliding rail 42, a plurality of nickel-titanium alloy springs 44 are arranged between the filling block 43 and the circular sliding rail 42, the nickel-titanium alloy spring 44 can “remember” its original shape under a specific temperature, and restore to the original shape after being deformed by external force, the nickel-titanium alloy has excellent biocompatibility and is suitable for the medical field, the filling block 43 can limit the displacement of the medullary nail 22 to the maximum extent through the action of the nickel-titanium alloy spring 44.

[0058] The filling block 43 is in close contact with the outer wall of the marrow bone nail 22, so that the gap between the filling block 43 and the marrow bone nail 22 is avoided when the filling block 43 is out, so that the filling block 43 and the tibia are not filled densely, and finally the tibia assembly 1 is loose.

[0059] When the implant is used for a long time, the tibia near the marrow bone nail 22 will inevitably be worn, and if worn, the tibia assembly 1 will be loose, and even fall off. When the tibia near the marrow bone nail 22 is worn, the nickel-titanium alloy spring 44 will drive the filling block 43 to displace outward on the mounting box 41, because the front end of the filling block 43 is thin and the rear end is thick, so it can be in close contact with the worn place, and the filling block 43 is in close contact with the outer wall of the marrow bone nail 22, so that the gap is avoided, so as to realize the filling of the worn place, and further improve the service life of the implant.

[0060] The present application covers any substitution, modification, equivalent method and scheme within 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 completely understood without the description of these details for 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 are not described in detail.

[0061] 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 principle of the present application, a number of improvements and refinements can be made, and these improvements and refinements should be regarded as the protection scope of the present application.

Claims

1. An implant for ankle replacement surgery, comprising a tibial component and a polyethylene insert mounted on the lower end of the tibial component, wherein the upper and lower ends of the tibial component are each provided with a plurality of triangular slots, the upper end of the polyethylene insert is provided with a plurality of triangular rods, and the lower end of the polyethylene insert is provided with a flat-cut talar component, the tibial component is provided with three fixing slots, each of the three fixing slots being fixedly mounted with a medullary bone nail, and characterized in that: The tibial component is provided with a displacement component for increasing the friction between the medullary nail and the tibia, the tibial component is provided with a driving component for driving the displacement component, the medullary nail is provided with a pushing component for increasing the contact area between the displacement component and the tibia, the fixing groove is provided with a filling component for preventing the medullary nail from wearing out the periphery of the tibia and loosening due to long-term use, and the driving component is provided with a clamping component for enhancing the bite force between the tibial component and the polyethylene insert; The displacement assembly includes a plurality of fixing holes formed on the axial side wall of the medullary bone nail, a displacement box being fixedly mounted on each of the fixing holes, a slide groove being formed on the displacement box, a trapezoidal block being slidably mounted on the slide groove, and a chamber being formed on the medullary bone nail; The driving assembly includes three oblique slots provided on the tibial assembly, each of the three oblique slots being slidably mounted with a driving rod, one end of the driving rod being fixedly mounted with a cross oblique plate, and three slots being provided on the polyethylene insert; The stuffing assembly includes a mounting box fixedly mounted on the fixing slot, the mounting box and the medullary bone nail are fixedly connected, a circular slide rail is provided on the mounting box, a stuffing block is slidably mounted on the circular slide rail, and a plurality of nickel-titanium alloy springs are provided between the stuffing block and the circular slide rail; The push assembly includes a first mounting groove provided on the trapezoidal block, two slide rails are fixedly installed on the first mounting groove, and displacement blocks are slidably installed on the two slide rails. A moving groove is provided at one end of the trapezoidal block, and a pressing block is slidably installed on the moving groove. The clamping assembly includes a limiting groove formed on the polyethylene insert, a cavity formed on the driving rod, an arc block slidably mounted on the cavity, and a second spring disposed between the arc block and the cavity.

2. The implant for ankle replacement surgery according to claim 1, characterized in that: The inclined surface of the trapezoidal block corresponds to the inclined surface of the cross inclined plate.

3. The implant for ankle replacement surgery according to claim 1, characterized in that: The length of the driving rod is greater than the distance from the oblique groove to the end of the medullary bone nail, and the driving rod and the medullary bone nail are coaxially arranged.

4. The implant for ankle replacement surgery according to claim 1, wherein: The filling block is in contact with the outer wall of the medullary bone nail.

5. The implant for ankle replacement surgery according to claim 1, wherein: The displacements of the three clamping slots coincide with the positions of the three oblique slots, and the sizes of the clamping slots match the sizes of the driving rods.

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