CN113768671B

CN113768671B - Ankle joint prosthesis assembly

Info

Publication number: CN113768671B
Application number: CN202111329884.1A
Authority: CN
Inventors: 张帅; 王好奎
Original assignee: Beijing AK Medical Co Ltd
Current assignee: Beijing AK Medical Co Ltd
Priority date: 2021-11-11
Filing date: 2021-11-11
Publication date: 2022-04-19
Anticipated expiration: 2041-11-11
Also published as: CN113768671A

Abstract

The present invention provides an ankle prosthesis assembly comprising: the base body comprises a main body part and a connecting part arranged on the main body part; the adjusting structure is adjustably arranged on the connecting part so as to change the distance between the upper end part of the adjusting structure and the base body; and the cushion block structure is arranged on the main body part and positioned on the outer side of the connecting part. The technical scheme of this application has solved effectively among the correlation technique under the different bone defect condition of shin bone distal end the shin bone side false body can't realize with the shin bone distal end near term and the fixed problem of long term.

Description

Ankle joint prosthesis assembly

Technical Field

The invention relates to the technical field of medical instruments, in particular to an ankle joint prosthesis component.

Background

The ankle joint, the distal end of the tibia and the lower end of the fibula form the ankle joint, and the ankle joint, the head and the neck are divided into three parts, namely the joint with the largest load of a human body. Ankle joint diseases can be caused by ischemia of talus body, cartilage injury, fracture, tumor and other diseases, and the patients are difficult to walk and even disabled.

In the related art, ankle resurfacing is one of the main diagnostic and therapeutic methods for reconstructing ankle structure and function. However, after a pathology on the tibial side of the ankle joint, and in particular after a bone defect on the tibial side, the tibial side prosthesis cannot achieve a near and far fixation to the distal end of the tibia. Also, it is difficult to provide an effective tibial side replacement solution for the ankle joint for different bone defects at the distal tibia.

Disclosure of Invention

The invention mainly aims to provide an ankle joint prosthesis component to solve the problem that the tibia side prosthesis cannot realize near-term and long-term fixation with the tibia far end under different bone defects of the tibia far end in the related art.

In order to achieve the above object, the present invention provides an ankle joint prosthesis assembly comprising: the base body comprises a main body part and a connecting part arranged on the main body part; the adjusting structure is adjustably arranged on the connecting part so as to change the distance between the upper end part of the adjusting structure and the base body; and the cushion block structure is arranged on the main body part and positioned on the outer side of the connecting part.

Further, connecting portion include first plate body and the second plate body that the interval set up, and regulation structure includes the regulating plate, and the regulating plate inserts to between first plate body and the second plate body, and the direction of height of first plate body can be followed to the regulating plate removes, and ankle joint false body still includes connection structure, and connection structure sets up between regulating plate, first plate body and the second plate body to connect regulating plate, first plate body and second plate body.

Further, be provided with a plurality of first spacing holes along the direction of height on the first plate body, be provided with a plurality of second spacing holes along the direction of height on the second plate body, the setting of a plurality of first spacing holes and a plurality of second spacing hole one-to-one is provided with a plurality of regulation holes along the direction of height on the regulating plate, connection structure selectively sets up in the spacing downthehole upper end and the base member distance between the base member in order to adjust regulation structure in first spacing hole of co-altitude, regulation hole and second.

Further, adjust the structure and still include a fixed section of thick bamboo, a fixed section of thick bamboo sets up in the one end that connecting portion were kept away from to the regulating plate, and the lateral wall of a fixed section of thick bamboo is connected with the lateral wall of regulating plate, and the direction of a fixed section of thick bamboo axis is parallel with the width direction of regulating plate.

Furthermore, a plurality of connecting holes are formed in the fixed cylinder and penetrate through the side wall of the fixed cylinder.

Further, the cushion block structure comprises a first cushion block and a second cushion block, the first cushion block and the second cushion block are alternatively arranged on the main body portion, a notch is formed in the middle of the first cushion block, the connecting portion is located in the notch, a concave portion is formed in the side portion of the second cushion block, and part of the structure of the connecting portion is located in the concave portion.

Further, the ankle joint prosthesis further comprises a gasket, the gasket is arranged below the main body portion, one side, away from the main body portion, of the gasket is provided with a concave surface, and the concave surface is a smooth surface.

Further, the ankle joint prosthesis further comprises a boss arranged on the gasket, the side wall of the boss is obliquely arranged relative to the upper surface of the gasket, a mounting groove is formed in the bottom of the main body, the groove wall of the mounting groove is obliquely arranged relative to the bottom surface of the main body, the boss is inserted into the mounting groove, and the side wall of the boss is matched with the groove wall of the mounting groove.

Furthermore, the middle part of the boss is provided with a limiting groove, a limiting block is arranged in the mounting groove, and the limiting block is in limiting fit with the limiting groove.

Further, still be provided with the installation department on the gasket, the installation department sets up in the lateral part of boss and/or the lateral part of main part, and the installation department corresponds the setting with the spacing groove.

By applying the technical scheme of the invention, the base body comprises the main body part and the connecting part, the connecting part is arranged on the main body part, the adjusting structure is adjustably arranged on the connecting part, and the distance between the upper end part of the adjusting structure and the base body can be variably arranged. The cushion block structure is arranged on the main body part and positioned on the outer side of the connecting part. Through foretell setting, when implanting ankle joint prosthesis subassembly, can adjust the position of adjusting the structure to the pertinence to make adjust the structure can contact and cooperate with human shin bone effectively, simultaneously, the cushion structure can play the effect of support, supports the shin bone effectively, makes ankle joint prosthesis subassembly can the more patients of adaptation like this, and then has improved its commonality effectively. Therefore, the technical scheme of the application effectively solves the problem that the tibial side prosthesis under the condition of different bone defects of the distal end of the tibia in the related technology can not realize the near-term and long-term fixation with the distal end of the tibia.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 shows a perspective view of an embodiment of an ankle prosthesis assembly according to the invention;

FIG. 2 illustrates a perspective view of the ankle prosthesis assembly of FIG. 1 with a second spacer installed;

FIG. 3 illustrates a perspective view of an unassembled pad structure of the ankle prosthesis assembly of FIG. 1;

FIG. 4 illustrates a perspective view of the base of the ankle prosthesis assembly of FIG. 1;

FIG. 5 shows a schematic side view of the base of FIG. 4;

FIG. 6 shows a schematic bottom view of the base of FIG. 4;

FIG. 7 illustrates a perspective view of an adjustment structure of the ankle prosthesis assembly of FIG. 1;

FIG. 8 shows a side schematic view of the adjustment structure of FIG. 7;

FIG. 9 illustrates a perspective view of a first spacer of the ankle prosthesis assembly of FIG. 1;

FIG. 10 shows a schematic bottom view of the first head block of FIG. 9;

FIG. 11 illustrates a perspective view of a second spacer of the ankle prosthesis assembly of FIG. 2;

FIG. 12 shows a bottom schematic view of the second head block of FIG. 11;

FIG. 13 illustrates a perspective view of a shim of the ankle prosthesis assembly of FIG. 1;

fig. 14 shows a side view schematic of the shim of fig. 13.

Wherein the figures include the following reference numerals:

10. a substrate; 11. a main body portion; 111. installing a groove; 1111. a limiting block; 12. a connecting portion; 121. a first plate body; 1211. a first limit hole; 122. a second plate body; 1221. a second limiting hole; 20. an adjustment structure; 21. an adjusting plate; 211. an adjustment hole; 22. a fixed cylinder; 221. connecting holes; 30. a cushion block structure; 31. a first cushion block; 311. a notch; 32. a second cushion block; 321. a recess; 40. a connecting structure; 50. a gasket; 51. an inner concave surface; 52. a boss; 521. a limiting groove; 53. an installation part.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

As shown in fig. 1 to 8, in the present embodiment, the ankle prosthesis assembly includes: a base body 10, an adjustment structure 20 and a pad structure 30. The base 10 includes a main body 11 and a connecting portion 12 provided on the main body 11. The adjustment structure 20 is adjustably provided on the connection portion 12 to change a distance between an upper end portion of the adjustment structure 20 and the base 10. The cushion block structure 30 is disposed on the main body portion 11 and outside the connecting portion 12.

By applying the technical solution of the present embodiment, the base body 10 includes a main body portion 11 and a connecting portion 12, the connecting portion 12 is disposed on the main body portion 11, the adjusting structure 20 is adjustably disposed on the connecting portion 12, and a distance between an upper end portion of the adjusting structure 20 and the base body 10 is variably disposed. The pad structure 30 is disposed on the main body 11 and outside the connecting portion 12. Through foretell setting, when implanting ankle joint prosthesis subassembly, can adjust the position of adjusting structure 20 to the pertinence to make adjust structure 20 can contact and cooperate with human shinbone effectively, simultaneously, cushion structure 30 can play the effect of support, supports the shinbone effectively, makes ankle joint prosthesis subassembly can adapt more patients like this, and then has improved its commonality effectively. Therefore, the technical scheme of the embodiment effectively solves the problem that the tibial side prosthesis under different bone defects of the distal end of the tibia in the related art cannot realize near-term and long-term fixation with the distal end of the tibia.

As shown in fig. 1 to 5, in the present embodiment, the connecting portion 12 includes a first plate 121 and a second plate 122 which are spaced apart from each other, the adjusting structure 20 includes an adjusting plate 21, the adjusting plate 21 is inserted between the first plate 121 and the second plate 122, the adjusting plate 21 is movable in a height direction of the first plate 121, and the ankle joint prosthesis further includes a connecting structure 40, the connecting structure 40 is disposed between the adjusting plate 21, the first plate 121, and the second plate 122 to connect the adjusting plate 21, the first plate 121, and the second plate 122. The first plate body 121 and the second plate body 122 can effectively limit the position of the adjustment plate 21 and can secure the position and moving direction of the adjustment plate 21. The connecting structure 40 can effectively fix the first plate body 121, the adjusting plate 21 and the second plate body 122, so that the whole structure is stably connected together, the connecting strength is ensured, and the connecting structure can be more stable in use.

As shown in fig. 1 to 8, in this embodiment, a plurality of first limiting holes 1211 are disposed on the first plate 121 along the height direction, a plurality of second limiting holes 1221 are disposed on the second plate 122 along the height direction, the plurality of first limiting holes 1211 and the plurality of second limiting holes 1221 are disposed in a one-to-one correspondence manner, a plurality of adjusting holes 211 are disposed on the adjusting plate 21 along the height direction, and the connecting structure 40 is selectively disposed in the first limiting holes 1211, the adjusting holes 211 and the second limiting holes 1221 at different heights to adjust the distance between the upper end of the adjusting structure 20 and the base 10. The plurality of first limiting holes 1211 and the plurality of second limiting holes 1221 are simple in structure and convenient to set, and the first limiting holes 1211 and the second limiting holes 1221 are correspondingly arranged, so that the position of the adjusting plate 21 can be more stable when the connecting structure 40 is connected. Specifically, in the present embodiment, the number of the first position-limiting holes 1211 is 6, the number of the second position-limiting holes 1221 is 6, and the number of the adjusting holes 211 is also 6. The 6 first limiting holes 1211 and the second limiting holes 1221 are arranged in an array, and the 6 adjusting holes 211 are arranged in the same manner as the first limiting holes 1211. The 6 first limiting holes 1211 are divided into 3 groups, and 3 groups are spaced apart from each other in the height direction of the first plate 121, and each group includes two first limiting holes 1211. The second limiting hole 1221 is disposed corresponding to the first limiting hole 1211. The lowermost adjusting hole 211 of the plurality of adjusting holes 211 may be connected to the first set of first position-limiting holes 1211, may be connected to the second set of first position-limiting holes 1211, and may be connected to the third set of first position-limiting holes 1211. The whole body is more stable due to the connection mode, and the height of the adjusting plate 21 can be effectively adjusted, so that the defect condition of the tibia far end bone is adapted, and the ankle joint tibia side prosthesis and the tibia far end bone are effectively fixed. Countersunk structures are designed outside the first limiting holes 1211 and the second limiting holes 1221.

As shown in fig. 1 to 8, in the present embodiment, the adjusting structure 20 further includes a fixing cylinder 22, the fixing cylinder 22 is disposed at an end of the adjusting plate 21 far from the connecting portion 12, a side wall of the fixing cylinder 22 is connected to a side wall of the adjusting plate 21, and an axial direction of the fixing cylinder 22 is parallel to a width direction of the adjusting plate 21. The setting of fixed cylinder 22 can improve the area of contact with the shin bone on the one hand, and then improves connection stability, and on the other hand can prevent that the skew from appearing in the shin bone in regulating plate 21, and the effect of influence connection.

As shown in fig. 1 to 8, in the present embodiment, the fixed cylinder 22 is provided with a plurality of connection holes 221, and the plurality of connection holes 221 penetrate through the side wall of the fixed cylinder 22. The connecting holes are simple in structure, in the embodiment, after the adjusting structure 20 is implanted, bone cement is injected into the connecting holes 221, the bone cement overflows from the plurality of connecting holes 221, and therefore the fixing cylinder 22 is enabled to be in contact with the tibia more stably.

In an embodiment not shown in the figures, the tibia and the fixed cylinder may also be connected together by a fastener.

As shown in fig. 1 to 5 and 9 to 12, in the present embodiment, the pad block structure 30 includes a first pad block 31 and a second pad block 32, the first pad block 31 and the second pad block 32 are alternatively disposed on the main body portion 11, a notch 311 is disposed in a middle portion of the first pad block 31, the connecting portion 12 is located in the notch 311, a concave portion 321 is disposed in a side portion of the second pad block 32, and a part of the connecting portion 12 is located in the concave portion 321. The first spacer 31 and the second spacer 32 are alternatively mounted on the main body portion 11, and specifically, the first spacer 31 is a fully-enclosed spacer and the second spacer 32 is a semi-enclosed spacer, so that the first spacer 31 or the second spacer 32 can be selected according to different bone defects of patients, thereby enabling the ankle joint prosthesis assembly to be better adapted to the bone structure of the human body.

In the embodiment not shown in the figure, the upper surfaces of the first cushion block and the second cushion block are irregular surfaces, namely non-planar surfaces, and can be set specifically according to the actual situation of a patient so as to improve the stability of the contact between the bone structure of the patient and the cushion blocks.

As shown in fig. 1 to 5 and fig. 13 and 14, in the present embodiment, the ankle joint prosthesis further includes a spacer 50, the spacer 50 is disposed below the main body portion 11, a side of the spacer 50 away from the main body portion 11 is provided with a concave surface 51, and the concave surface 51 is a smooth surface. The shim 50 is configured to better contact other structures and the concave inner surface 51 is configured to enable movement of the ankle prosthesis assembly. The smooth surface can effectively reduce the friction resistance.

As shown in fig. 1 to 5 and fig. 13 and 14, in the present embodiment, the ankle joint prosthesis further includes a boss 52 provided on the spacer 50, a side wall of the boss 52 is obliquely provided with respect to an upper surface of the spacer 50, a bottom of the main body portion 11 is provided with a mounting groove 111, a groove wall of the mounting groove 111 is obliquely provided with respect to a bottom surface of the main body portion 11, the boss 52 is inserted into the mounting groove 111, and a side wall of the boss 52 is fitted with the groove wall of the mounting groove 111. The bosses 52 are inserted into the mounting grooves 111, which effectively achieves the connection of the main body portion 11 and the gasket 50, and specifically, the bosses 52 and the mounting grooves 111 cooperate to form a dovetail-like structure, which effectively achieves the position limitation of multiple degrees of freedom. That is, the spacer 50 and the main body 11 can be prevented from being separated vertically or from moving laterally.

As shown in fig. 1 to 5 and fig. 13 and 14, in this embodiment, a limiting groove 521 is disposed in the middle of the boss 52, a limiting block 1111 is disposed in the mounting groove 111, and the limiting block 1111 is in limiting fit with the limiting groove 521. The limiting block 1111 is matched with the limiting groove 521, so that the position between the gasket 50 and the main body part 11 can be further limited, and the whole structure is more stable.

It should be noted that the above-mentioned engagement between the limiting groove 521 and the limiting block 1111 interacts with the engagement between the boss 52 and the mounting groove 111. Together, a 5 degree of freedom constraint is achieved.

As shown in fig. 1 to 5 and fig. 13 and 14, in the present embodiment, the gasket 50 is further provided with a mounting portion 53, the mounting portion 53 is provided on a side portion of the boss 52 and/or a side portion of the main body portion 11, and the mounting portion 53 is provided corresponding to the stopper groove 521. The mounting portion 53 is provided for easy access and easy assembly, and specifically, in the present embodiment, the mounting portion 53 is provided at the side of the boss 52 and the side of the main body portion 11. Of course, the mounting portion 53 may be provided separately on the side of the boss 52 or the side of the body portion 11.

As shown in fig. 1 to 14, in the present embodiment, the ankle joint prosthesis assembly of the present embodiment is an ankle joint tibia side prosthesis with a patch interface, which is telescopically fixed up and down, and mainly includes a main body portion 11, a connecting portion 12, an adjusting plate 21, a connecting structure 40, a spacer structure 30, and a spacer 50. The main body part 11 is of a bilateral symmetry structure, the upper side of the main body part is provided with a connecting part 12, the connecting part 12 is of a U-shaped rib plate structure, and the lower side of the main body part is provided with a threaded hole for preventing the gasket from dislocating and a threaded hole for fixing or plugging the cushion block structure 30.

Two rows of first limiting holes 1211 are formed in one side (the first plate body 121) of the U-shaped rib plate, the sizes of the first limiting holes 1211 are the same, the distances among the axes of the first limiting holes 1211 are the same, and a countersunk hole structure is designed on the outer side of each first limiting hole 1211; a plurality of second limiting holes 1221 which are arranged in two rows at the opposite side are formed in the other side (the second plate body 122) of the U-shaped rib plate, the plurality of second limiting holes 1221 are full threaded holes, and threads are of an internal thread structure; the first and second limiting holes 1211 and 1221 are used to connect with the adjusting plate 21, and are assembled and screwed by the connecting structure 40 (screw); a countersunk hole structure is designed at the outer side of the first limit hole 1211, and the countersunk head of the connecting screw of the adjusting plate 21 can be embedded into the countersunk head of the connecting screw of the adjusting plate 21, so that the countersunk head of the connecting screw of the adjusting plate 21 does not protrude out of the outer surface of the first plate body 121 at the side of the first limit hole 1211; the U-shaped cavity is used for inserting and assembling the adjusting plate 21, the assembling height of the U-shaped cavity and the adjusting plate can be adjusted through two columns, a plurality of first limiting holes 1211 and a plurality of second limiting holes 1221 so as to adapt to the defect condition of the far-end bone of the tibia, and the ankle joint tibia side prosthesis and the far-end bone of the tibia can be effectively fixed.

The front part of the ankle joint tibia side platform of the main body part 11 is provided with a gasket dislocation prevention threaded hole which is of a full thread structure, the left part and the right part are respectively provided with a countersunk head structure, and the countersunk head part of the gasket dislocation prevention stud can be embedded into the countersunk head part of the gasket dislocation prevention stud, so that the countersunk head part of the gasket dislocation prevention stud does not protrude out of the upper surface of the ankle joint tibia side platform.

The rear part of the ankle joint tibia side platform of the main body part 11 is provided with a cushion block structure 30 for fixing or blocking threaded holes which are of a full thread structure, the left part and the right part are respectively provided with a countersunk hole structure, and the top part of the ankle joint tibia side platform is provided with a countersunk hole structure; when the cushion block structure 30 is not used, the countersunk head part of the assembled blocking screw of the cushion block structure 30 can be embedded into the countersunk hole of the cushion block structure 30 by the structure with the countersunk head hole at the top, so that the countersunk head part of the blocking screw of the cushion block structure 30 does not protrude out of the upper surface of the tibial side platform of the ankle joint; when using the cushion block structure 30, full thread structure accessible cushion block structure 30 set screw carries out the pressure to assemble the cushion block to satisfy the purpose of filling the bone defect.

The underside of the ankle tibia platform of the main body part 11 is provided with a dovetail groove structure, so that excessive fit and interference fit with a matched gasket 50 can be realized, and locking of the gasket is realized through an assembled gasket dislocation-preventing stud.

The adjusting plate 21 has a hollow cylindrical head, i.e., a fixed cylinder 22. The hollow cylindrical head is provided with an axial through hole and a radial hollow hole structure; the ankle joint tibia side prosthesis can be implanted into a human body, bone cement is injected through the axial through hole, and the bone cement is combined with bone through the radial hollow holes, so that a reinforcing effect is achieved.

The adjusting plate 21 is connected with a screw and comprises a front head part, a middle rod part and a rear threaded part; the head part is of a countersunk head structure and is provided with an internal hexagonal wrench interface; the rod part is of a polished rod structure; the thread part is an external thread and is in threaded connection with an internal thread on the other side of the U-shaped rib plate on the main body part; the adjusting plate 21 connecting screw is used for fastening the assembled main body component and the adjusting plate, and at least one adjusting plate 21 connecting screw is assembled on each column of the assembled main body part 11 and the assembled adjusting plate 21 to realize the threaded connection of the main body part 11 and the adjusting plate 21; after assembly, the tail of the adjusting plate 21 connected with the screw thread part of the screw is positioned between the inner surface and the outer surface of the side rib plate of the full thread hole of the U-shaped rib plate of the main body part 11.

The gasket dislocation preventing stud comprises a front head part, a middle threaded part and a rear rod part; the head part is of a countersunk head structure and is provided with an internal hexagonal wrench interface; the thread part is an external thread; the rod part is of a polished rod structure; after the cushion block is arranged in the dovetail groove of the main body part 11, the gasket dislocation preventing stud is assembled into the gasket dislocation preventing threaded hole of the main body part, the head part of the gasket dislocation preventing stud is embedded into the countersunk hole of the gasket dislocation preventing threaded hole of the main body part 11, the threaded part of the gasket dislocation preventing stud does not protrude out of the upper surface of the dovetail groove of the main body part 11, the rod part of the gasket dislocation preventing stud is inserted into the dislocation preventing hole of the gasket, and the purpose of preventing the gasket from being dislocated is achieved.

The cushion block structure 30 is a fixing screw and comprises a front head part, a middle rod part and a rear thread part; the head part is of a countersunk head structure and is provided with an internal hexagonal wrench interface; the rod part is of a polished rod structure; the thread part is of an external thread structure; when the cushion block structure 30 is used, a fixing screw of the cushion block structure 30 is assembled into a cushion block fixing or blocking threaded hole at the rear part of the ankle joint tibial side platform of the main body part 11 through a half cushion block (a second cushion block 32) and a full cushion block (a first cushion block 31), so that the fixing screw of the cushion block structure 30 is in a press-fit state with the upper side of the ankle joint tibial side platform of the main body part 11 through the half cushion block, the full cushion block or a patch; the head of the fixing screw of the cushion block structure 30 is embedded into the countersunk hole of the cushion block structure 30, and the head of the fixing screw of the cushion block structure 30 does not protrude out of the upper surfaces of the half cushion block and the full cushion block.

The upper end of the gasket 50 is provided with a dovetail groove structure, and the front part of the gasket is provided with an anti-dislocation hole; the dovetail groove structure is matched with the dovetail groove structure of the ankle joint tibia side platform of the main body part 11, and the gasket dislocation preventing stud is assembled into a dislocation preventing hole in the front of the gasket to play a role in preventing the gasket from dislocating.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An ankle prosthesis assembly, comprising:

a base body (10), the base body (10) including a main body portion (11) and a connecting portion (12) provided on the main body portion (11);

an adjustment structure (20), the adjustment structure (20) being adjustably arranged on the connection portion (12) to change a distance between an upper end of the adjustment structure (20) and the base body (10);

a pad block structure (30) provided on the main body portion (11) and located outside the connecting portion (12);

the connecting part (12) comprises a first plate body (121) and a second plate body (122) which are arranged at intervals, the adjusting structure (20) comprises an adjusting plate (21), and the adjusting plate (21) is inserted between the first plate body (121) and the second plate body (122);

the adjusting structure (20) further comprises a fixing cylinder (22), the fixing cylinder (22) is arranged at one end, far away from the connecting part (12), of the adjusting plate (21), the side wall of the fixing cylinder (22) is connected with the side wall of the adjusting plate (21), and the axis direction of the fixing cylinder (22) is parallel to the width direction of the adjusting plate (21);

the fixing cylinder (22) is provided with a plurality of connecting holes (221), the connecting holes (221) penetrate through the side wall of the fixing cylinder (22), and bone cement is injected into the connecting holes (221);

the cushion block structure (30) comprises a first cushion block (31) and a second cushion block (32), the first cushion block (31) and the second cushion block (32) are alternatively arranged on the main body part (11), a notch (311) is formed in the middle of the first cushion block (31), the connecting part (12) is located in the notch (311), a concave part (321) is formed in the side part of the second cushion block (32), and part of the connecting part (12) is located in the concave part (321);

the ankle joint prosthesis further comprises a gasket (50), the gasket (50) is arranged below the main body part (11), an inner concave surface (51) is arranged on one side, far away from the main body part (11), of the gasket (50), the inner concave surface (51) is a smooth surface, the ankle joint prosthesis further comprises a boss (52) arranged on the gasket (50), the side wall of the boss (52) is obliquely arranged relative to the upper surface of the gasket (50), a mounting groove (111) is arranged at the bottom of the main body part (11), the groove wall of the mounting groove (111) is obliquely arranged relative to the bottom surface of the main body part (11), the boss (52) is inserted into the mounting groove (111), the side wall of the boss (52) is matched with the groove wall of the mounting groove (111), and a limiting groove (521) is arranged in the middle of the boss (52), a limiting block (1111) is arranged in the mounting groove (111), and the limiting block (1111) is matched with the limiting groove (521) in a limiting mode.

2. The ankle joint prosthesis assembly according to claim 1, wherein the adjustment plate (21) is movable in a height direction of the first plate body (121), the ankle joint prosthesis further comprising a connection structure (40), the connection structure (40) being provided between the adjustment plate (21), the first plate body (121) and the second plate body (122) to connect the adjustment plate (21), the first plate body (121) and the second plate body (122).

3. The ankle joint prosthesis assembly according to claim 2, wherein the first plate body (121) is provided with a plurality of first limiting holes (1211) along a height direction, the second plate body (122) is provided with a plurality of second limiting holes (1221) along the height direction, the plurality of first limiting holes (1211) and the plurality of second limiting holes (1221) are correspondingly arranged one by one, the adjusting plate (21) is provided with a plurality of adjusting holes (211) along the height direction, and the connecting structure (40) is selectively arranged in the first limiting holes (1211), the adjusting holes (211) and the second limiting holes (1221) at different heights to adjust a distance between an upper end of the adjusting structure (20) and the base body (10).

4. The ankle joint prosthesis assembly according to claim 1, wherein the spacer (50) is further provided with a mounting portion (53), the mounting portion (53) being provided at a side portion of the boss (52) and/or a side portion of the main body portion (11), the mounting portion (53) being provided corresponding to the stopper groove (521).