CN116019613A

CN116019613A - Semi-elbow joint prosthesis

Info

Publication number: CN116019613A
Application number: CN202310326947.0A
Authority: CN
Inventors: 蒋协远; 查晔军; 公茂琪; 刘敏; 霍亚平; 李健
Original assignee: Beijing Jishuitan Hospital; Beijing AK Medical Co Ltd
Current assignee: Beijing Jishuitan Hospital Affiliated To Capital Medical University; Beijing AK Medical Co Ltd
Priority date: 2023-03-30
Filing date: 2023-03-30
Publication date: 2023-04-28
Anticipated expiration: 2043-03-30
Also published as: CN116019613B

Abstract

The present invention provides a semi-elbow joint prosthesis comprising: a humerus stem comprising a connecting seat and a first rod body connected to the connecting seat; the connecting neck is detachably connected with the connecting seat; the connecting assembly comprises an assembling part and a connecting column, the assembling part comprises a first assembling hole and a second assembling hole, one of the assembling part and the connecting column is arranged on the connecting seat, the other of the assembling part and the connecting column is arranged on the connecting neck, and the connecting column is inserted into the first assembling hole or the second assembling hole; the locking structure is arranged between the connecting column and the connecting seat or between the connecting column and the connecting neck; the pulley structure is connected to the connecting neck; wherein, the axis of first pilot hole and the axis parallel arrangement of second pilot hole. The technical scheme of the application effectively solves the problem that the elbow joint prosthesis in the related technology cannot be used for realizing left and right universality.

Description

Semi-elbow joint prosthesis

Technical Field

The invention relates to the technical field of medical instruments, in particular to a semi-elbow joint prosthesis.

Background

The elbow joint is an important joint component for coordinating the movement of the shoulder joint, the forearm and the wrist joint, and the elbow joint has good movement range and stability and can play the functions of the shoulder and the hand. However, the movement of the elbow joint is large, which is easy to cause joint diseases, or the elbow joint prosthesis needs to be replaced due to fracture caused by trauma.

In the related art, the form of the left and right elbow joint prostheses is different, and therefore, when the elbow joint replacement of the left hand is performed, the left elbow joint prosthesis needs to be prepared, and when the elbow joint replacement of the right hand is performed, the right elbow joint prosthesis needs to be prepared, that is, the elbow joint prostheses in the prior art cannot be used in common left and right.

Disclosure of Invention

The invention mainly aims to provide a semi-elbow joint prosthesis, which aims to solve the problem that the semi-elbow joint prosthesis in the related art cannot be used for realizing left and right universality.

To achieve the above object, the present invention provides a semi-elbow joint prosthesis comprising: a humerus stem comprising a connecting seat and a first rod body connected to the connecting seat; the connecting neck is detachably connected with the connecting seat; the connecting assembly comprises an assembling part and a connecting column, the assembling part comprises a first assembling hole and a second assembling hole, one of the assembling part and the connecting column is arranged on the connecting seat, the other of the assembling part and the connecting column is arranged on the connecting neck, and the connecting column is inserted into the first assembling hole or the second assembling hole; the locking structure is arranged between the connecting column and the connecting seat or between the connecting column and the connecting neck; the pulley structure is connected to the connecting neck; wherein, the axis of first pilot hole and the axis parallel arrangement of second pilot hole.

Further, the first assembly hole and the second assembly hole are formed in the connecting seat, the connecting column is arranged on the connecting neck, a first distance is formed between the axis of the first assembly hole and the central line of the connecting seat, and a second distance is formed between the axis of the second assembly hole and the axis of the connecting seat.

Further, the connecting column is a conical column, the first assembly hole is a first conical hole, and the second assembly hole is a second conical hole.

Further, the locking structure comprises a first locking hole, a second locking hole and a locking column, wherein the first locking hole and the second locking hole are arranged on the side wall of the connecting seat at intervals, a plurality of connecting holes are formed in the side wall of the connecting column, and the locking column is inserted into one of the first locking hole and the plurality of connecting holes, or the locking column is inserted into one of the second locking hole and the plurality of connecting holes.

Further, the semi-elbow joint prosthesis further comprises a first anti-falling structure and a second anti-falling structure, the first anti-falling structure and the second anti-falling structure are arranged between the locking column and the connecting seat, the first anti-falling structure is arranged at the first locking hole, and the second anti-falling structure is arranged at the second locking hole.

Further, the first anti-drop structure comprises a first annular clamping groove and a first notch which is arranged on the side portion of the first locking hole and communicated with the first annular clamping groove, a protruding block is arranged on the side wall of the locking column, and the protruding block is inserted into the first annular clamping groove through the first notch and is limited in the first annular clamping groove in a rotating mode.

Further, the second anti-drop structure comprises a second annular clamping groove and a second notch which is arranged on the side part of the second locking hole and communicated with the second annular clamping groove, a bump is arranged on the side wall of the locking column, and the bump is inserted into the second annular clamping groove through the second notch and is rotationally limited in the second annular clamping groove.

Further, the lug sets up the tip of keeping away from the spliced pole at the locking post, and the lug extends along the circumference of locking post, and the tip of keeping away from the spliced pole of locking post is provided with operating portion.

Further, the semi-elbow joint prosthesis further comprises an adjusting assembly, the adjusting assembly comprises a plurality of first slots and inserting blocks, the first slots and the inserting blocks are arranged along the circumferential direction of the first assembly holes at intervals, each first slot is provided with an interval with the first assembly holes, the inserting blocks are in inserted fit with the first slots, one of the first slots and the inserting blocks is arranged on one side, facing the connecting neck, of the connecting seat, and the other of the first slots and the inserting blocks is arranged on one side, facing the connecting seat, of the connecting neck.

Further, the adjusting component further comprises a plurality of second slots, the second slots are arranged along the circumferential interval of the second assembly holes, an interval is reserved between each second slot and each second assembly hole, the first slots and the second slots are arranged on the connecting seat, the inserting blocks are arranged on the connecting neck, and the inserting blocks are in inserting fit with the inserting blocks.

Further, the connecting neck comprises a base body, a first connecting arm and a second connecting arm, wherein the first connecting arm and the second connecting arm are connected with the base body, the base body and the connecting seat are arranged in a superposed mode, the connecting assembly is arranged between the base body and the connecting seat, and the first connecting arm and the second connecting arm are connected with the pulley structure.

Further, the pulley structure is provided with a first mounting hole and a second mounting hole, the first connecting arm is inserted into the first mounting hole, and the second connecting arm is inserted into the second mounting hole.

Further, the humerus handle also comprises a second rod body, the length of the second rod body is smaller than that of the first rod body, the second rod body and the first rod body are arranged at intervals, a plurality of bone grafting bins are arranged at intervals on one side of the second rod body, which faces the first rod body, and a plurality of grooves are arranged at intervals on one side of the first rod body, which is far away from the second rod body; one side of the first rod body, which is far away from the groove, is provided with a first limiting surface and a second limiting surface, and an obtuse included angle is formed between the first limiting surface and the second limiting surface.

By applying the technical scheme of the invention, the humerus handle comprises a connecting seat and a first rod body arranged on the connecting seat. The connecting neck is detachably connected with the connecting seat. The connecting assembly comprises an assembling portion and a connecting column, one of the assembling portion and the connecting column is arranged on the connecting seat, the other is arranged on the connecting neck, and specifically, the assembling portion comprises a first assembling hole and a second assembling hole. The locking structure is disposed between the connection post and the connection seat or between the connection post and the connection neck. The pulley structure is connected to the connecting neck. Specifically, the axes of the first fitting hole and the second fitting hole are disposed in parallel. With the above arrangement, the connecting rod is inserted into the first fitting hole when the left elbow joint is replaced, and the connecting rod is inserted into the second fitting hole when the right elbow joint is replaced. The locking structure can lock the position between the connecting seat and the connecting neck, so that the whole structure of the semi-elbow joint prosthesis is more stable. Simultaneously, can realize the function of elbow joint under the effect of coaster structure. Therefore, the technical scheme effectively solves the problem that the elbow joint prosthesis in the related technology cannot be used for realizing left and right universality.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:

FIG. 1 shows a schematic exploded view of an embodiment of a semi-elbow joint prosthesis according to the present invention;

FIG. 2 shows a schematic perspective view of the left-hand semi-elbow joint prosthesis of FIG. 1;

FIG. 3 shows a schematic perspective view of the right-hand semi-elbow joint prosthesis of FIG. 1;

FIG. 4 shows a schematic cross-sectional view of the semi-elbow joint prosthesis of FIG. 2;

FIG. 5 shows a partial enlarged view at A of the semi-elbow joint prosthesis of FIG. 4;

FIG. 6 shows a schematic perspective view of the connective neck of the semi-elbow joint prosthesis of FIG. 1;

FIG. 7 shows a partial enlarged view of the connecting neck at B of FIG. 6;

FIG. 8 shows a schematic perspective view of the humeral stem of the hemi-elbow joint prosthesis of FIG. 1;

fig. 9 shows a partial enlarged view of the humeral stem of fig. 8 at C.

Wherein the above figures include the following reference numerals:

10. humeral stem; 11. a connecting seat; 12. a first rod body; 121. a groove; 122. a first limiting surface; 123. the second limiting surface; 13. a second rod body; 131. a bone grafting bin; 20. a connecting neck; 21. a base; 22. a first connecting arm; 23. a second connecting arm; 30. a connection assembly; 31. an assembling portion; 311. a first fitting hole; 312. a second fitting hole; 32. a connecting column; 321. a connection hole; 40. a locking structure; 41. a first locking hole; 42. a second locking hole; 43. locking the column; 431. a bump; 432. an operation unit; 50. a pulley structure; 51. a first mounting hole; 52. a second mounting hole; 61. a first anti-drop structure; 611. the first annular clamping groove; 612. a first notch; 62. a second anti-drop structure; 621. the second annular clamping groove; 622. a second notch; 70. an adjustment assembly; 71. a first slot; 72. inserting blocks; 73. and a second slot.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the 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 in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values.

As shown in fig. 1 to 9, in the present embodiment, the semi-elbow joint prosthesis includes: humeral stem 10, connective neck 20, connective assembly 30, locking structure 40, and sled structure 50. The humeral stem 10 includes a connection base 11 and a first stem 12 connected to the connection base 11. The connecting neck 20 is detachably connected to the connecting socket 11. The connection assembly 30 includes a fitting portion 31 and a connection post 32, the fitting portion 31 includes a first fitting hole 311 and a second fitting hole 312, one of the fitting portion 31 and the connection post 32 is provided on the connection base 11, the other of the fitting portion 31 and the connection post 32 is provided on the connection neck 20, and the connection post 32 is inserted into the first fitting hole 311 or the second fitting hole 312. The locking structure 40 is disposed between the connection post 32 and the connection seat 11 or between the connection post 32 and the connection neck 20. The sled structure 50 is attached to the connector neck 20. Wherein the axis of the first fitting hole 311 and the axis of the second fitting hole 312 are disposed in parallel.

With the technical solution of the present embodiment, the humerus stem 10 comprises a connecting seat 11 and a first stem body 12 arranged on the connecting seat 11. The connecting neck 20 is detachably connected to the connecting socket 11. The connection assembly 30 includes a fitting portion 31 and a connection post 32, one of the fitting portion 31 and the connection post 32 being provided on the connection base 11 and the other being provided on the connection neck 20, and specifically, the fitting portion 31 includes a first fitting hole 311 and a second fitting hole 312. The locking structure 40 is disposed between the connection post 32 and the connection seat 11 or between the connection post 32 and the connection neck 20. The sled structure 50 is attached to the connector neck 20. Specifically, the axes of the first fitting hole 311 and the second fitting hole 312 are disposed in parallel. With the above arrangement, the connecting post 32 is inserted into the first fitting hole 311 when the left elbow joint is replaced, and the connecting post 32 is inserted into the second fitting hole 312 when the right elbow joint is replaced. The locking structure 40 can lock the position between the connection seat 11 and the connection neck 20, thereby making the overall structure of the semi-elbow joint prosthesis more stable. At the same time, the function of the elbow joint can be achieved by the pulley structure 50. Therefore, the technical scheme of the embodiment effectively solves the problem that the elbow joint prosthesis in the related technology cannot be used for realizing left and right universality.

The humeral stem 10 is of cobalt chrome molybdenum alloy, which may be titanium alloy.

As shown in fig. 1 to 3, 6, 8 and 9, in the present embodiment, the first fitting hole 311 and the second fitting hole 312 are provided on the connection base 11, the connection post 32 is provided on the connection neck 20, a first distance is provided between the axis of the first fitting hole 311 and the center line of the connection base 11, and a second distance is provided between the axis of the second fitting hole 312 and the axis of the connection base 11. The device can realize the universality of the left side and the right side, and further can improve the universality of the semi-elbow joint prosthesis.

The first fitting hole 311 and the second fitting hole 312 are partially overlapped.

As shown in fig. 6 and 8, in the present embodiment, the connection post 32 is a tapered post, the first fitting hole 311 is a first tapered hole, and the second fitting hole 312 is a second tapered hole. The tapered column is easy to insert into the tapered hole, so that the difficulty of assembly can be reduced.

As shown in fig. 4 to 9, in the present embodiment, the locking structure 40 includes a first locking hole 41, a second locking hole 42, and a locking post 43, the first locking hole 41 and the second locking hole 42 are provided on a side wall of the connection holder 11 at intervals, a plurality of connection holes 321 are provided on a side wall of the connection post 32, and the locking post 43 is inserted into one of the first locking hole 41 and the plurality of connection holes 321, or the locking post 43 is inserted into one of the second locking hole 42 and the plurality of connection holes 321. The provision of the locking structure 40 enables the locking of the connection socket 11 and the connection neck 20 to be effectively achieved.

Specifically, when the connection post 32 is inserted into the first fitting hole 311, it can be locked by the first locking hole 41 and the locking post 43, and when the connection post 32 is inserted into the second fitting hole 312, it can be locked by the second locking hole 42 and the locking post 43.

As shown in fig. 4 to 9, in the present embodiment, the semi-elbow joint prosthesis further includes a first slip-off preventing structure 61 and a second slip-off preventing structure 62, the first slip-off preventing structure 61 and the second slip-off preventing structure 62 are disposed between the locking post 43 and the connection block 11, the first slip-off preventing structure 61 is disposed at the first locking hole 41, and the second slip-off preventing structure 62 is disposed at the second locking hole 42. The arrangement of the first and second

anti-drop structures

61 and 62 can effectively prevent the locking post 43 from dropping out, and thus can ensure the locking effect of the locking structure 40.

As shown in fig. 4 to 9, in the present embodiment, the first anti-disengaging structure 61 includes a first annular clamping groove 611 and a first notch 612 disposed at a side portion of the first locking hole 41 and in communication with the first annular clamping groove 611, a protrusion 431 is disposed on a side wall of the locking post 43, and the protrusion 431 is inserted into the first annular clamping groove 611 through the first notch 612 and is rotationally limited in the first annular clamping groove 611. The protruding block 431 can be inserted into the first annular clamping groove 611 through the first notch 612 and can be clamped in the first annular clamping groove 611, and the groove width of the first annular clamping groove 611 is in interference fit with the protruding block 431, so that the position of the protruding block 431 is more stable.

As shown in fig. 4 to 9, in the present embodiment, the second anti-disengaging structure 62 includes a second annular clamping groove 621 and a second notch 622 disposed at a side portion of the second locking hole 42 and in communication with the second annular clamping groove 621, a protrusion 431 is disposed on a side wall of the locking post 43, and the protrusion 431 is inserted into the second annular clamping groove 621 through the second notch 622 and is rotationally limited in the second annular clamping groove 621. The second annular locking groove 621 functions in the same manner as the first annular locking groove 611, and can also achieve a locking effect.

As shown in fig. 4 to 9, in the present embodiment, the projection 431 is provided at an end of the locking post 43 remote from the connection post 32, the projection 431 extends in the circumferential direction of the locking post 43, and an operation portion 432 is provided at an end of the locking post 43 remote from the connection post 32. The operation portion 432 is configured to drive the locking post 43 to rotate, so that the protrusion 431 is inserted into the first annular slot 611 or the second annular slot 621.

As shown in fig. 6, 8 and 9, in the present embodiment, the semi-elbow joint prosthesis further includes an adjustment assembly 70, the adjustment assembly 70 includes a plurality of first slots 71 and inserts 72 disposed at intervals along a circumferential direction of the first fitting hole 311, each of the first slots 71 has an interval with the first fitting hole 311, the inserts 72 are in insert-fit with the first slots 71, one of the first slots 71 and the inserts 72 is disposed at a side of the connection socket 11 facing the connection neck 20, and the other of the first slots 71 and the inserts 72 is disposed at a side of the connection neck 20 facing the connection socket 11. The arrangement of the adjustment assembly 70 enables rotation between the connecting seat 11 and the connecting neck 20, which enables the semi-elbow prosthesis to adapt to the anatomy of bones of different sizes.

Specifically, when the connection post 32 is inserted into the first fitting hole 311 and an adjustment is required, the insertion block 72 is inserted into one of the plurality of first insertion grooves 71, so that an adjustment of the angle between the connection base 11 and the connection neck 20 is achieved.

As shown in fig. 6, 8 and 9, in the present embodiment, the adjusting assembly 70 further includes a plurality of second slots 73, the plurality of second slots 73 are disposed at intervals along the circumferential direction of the second assembly hole 312, each second slot 73 has an interval with the second assembly hole 312, the first slot 71 and the second slot 73 are disposed on the connecting base 11, the insert 72 is disposed on the connecting neck 20, and the insert 72 are in an insert fit. The second slots are in plug-in fit with the plug blocks, and when the connecting post 32 is inserted into the second assembly hole 312 and adjustment is required, the plug blocks 72 are inserted into one of the second slots 73, so that the adjustment of the angle between the connecting seat 11 and the connecting neck 20 is realized.

As shown in fig. 6, in the present embodiment, the connecting neck 20 includes a base 21 and first and second connecting

arms

22 and 23 connected to the base 21, the base 21 and the connection block 11 are disposed in a stacked manner, the connection assembly 30 is disposed between the base 21 and the connection block 11, and the first and second connecting

arms

22 and 23 are connected to the pulley structure 50. The above arrangement can make the connection between the connecting neck 20 and the connecting seat 11 more stable.

As shown in fig. 1, in the present embodiment, the pulley structure 50 is provided with a first mounting hole 51 and a second mounting hole 52, the first connecting arm 22 is inserted into the first mounting hole 51, and the second connecting arm 23 is inserted into the second mounting hole 52. The arrangement can ensure the stability of connection and reduce the difficulty of assembly.

The semi-elbow joint prosthesis further includes a spline and a rack, one of the spline and the rack being disposed on the first connecting arm 22, the other of the spline and the rack being disposed in the first mounting hole 51, the rack being engaged with the spline. The racks can engage the tooth slots, which can effectively secure the first connecting arm 22. Specifically, a portion of the rack may be engaged with a portion of the tooth slot during adjustment.

The first connecting arm 22 is internally provided with an accommodating space, a plurality of through holes are formed in the first side wall of the first connecting arm 22 at intervals, a rack is arranged in the accommodating space, and the rack is retractably arranged in the through holes and has a locking position extending outwards and a retreating position retracting inwards. The setting of accommodation space can hold the rack effectively, can make the position more reasonable like this, and tooth portion on the rack can stretch out through the through-hole.

The semi-elbow joint prosthesis further comprises a connecting rod and a gear, wherein the connecting rod is connected with the end of the rack, a plurality of convex teeth are arranged on the connecting rod at intervals, the gear and the connecting rod are arranged in the accommodating space, the gear is meshed with the convex teeth, and the rack is driven by the connecting rod to switch between a locking position and an avoiding position. The gear can drive the connecting rod to move, and then the rack is driven to move at the locking position and the avoiding position.

Specifically, in the present embodiment, the accommodation space is in a "7" shape, and the connecting rod and the rack can move in the accommodation space.

The hemi-elbow joint prosthesis further comprises a locking member coupled between the gear and the first coupling arm 22. The position of the gear can be effectively locked through the locking piece after the gear is rotated and the position of the rack is adjusted.

The gear is provided with an adjusting groove and a mounting hole, the mounting hole is formed in the bottom wall of the adjusting groove, the locking piece is located in the mounting hole, and a distance is reserved between the locking piece and the notch of the adjusting groove. The setting of adjustment tank can realize adjusting gear's rotation, and specifically, the adjustment tank is "I" style of calligraphy, can drive gear rotation through the style of calligraphy screwdriver, and then drives the rack and remove.

The side wall of the second connecting arm 23 is provided with an avoidance hole, the avoidance hole is communicated with the accommodating space, and the gear is arranged in the avoidance hole. The gear can be exposed through the arrangement of the avoidance holes, so that medical staff can conveniently operate the gear to rotate.

As shown in fig. 8, in the present embodiment, the humerus stem 10 further includes a second rod 13, the length of the second rod 13 is smaller than that of the first rod 12, the second rod 13 and the first rod 12 are spaced apart, a plurality of bone grafting bins 131 are spaced apart from one side of the second rod 13 facing the first rod 12, and a plurality of grooves 121 are spaced apart from one side of the first rod 12 facing away from the second rod 13; the side of the first rod body 12 far away from the groove 121 is provided with a first limiting surface 122 and a second limiting surface 123, and an obtuse included angle is formed between the first limiting surface 122 and the second limiting surface 123. The first rod body 12 is inserted into the humeral cavity, the second rod body 13 is positioned at the outer side of the humerus, and the first rod body 12, the second rod body 13 and the humerus are connected through fasteners, so that the stability of connection can be ensured.

As shown in fig. 8, in this embodiment, the portion of the first rod 12 inserted into the humeral cavity may have a mesh structure to facilitate osseointegration; the cement fixing device can also be used for cement fixing, the section of the first rod body 12 is trapezoid, the anti-rotation function is achieved, and a groove is formed in one side, far away from the second rod body 13, of the first rod body 12, so that the anti-rotation function is increased; the second rod body 13 is provided with a grid structure which allows osseointegration with the implanted bone and increases long-term stability; and the presence of the bone grafting cartridge 131 may allow for height adjustment of the filler bone, allowing for better attachment between the second shaft 13, the filler bone and the humeral cortex.

As shown in fig. 8, in the present embodiment, a plurality of bone grafting bins 131 are disposed at intervals on a side of the second rod 13 facing the first rod 12. The bone grafting bin 131 is internally filled with autogenous bone or allogenic bone, so that the autogenous bone or the allogenic bone can be combined with the humerus bone in a growing mode, and the connecting effect can be improved.

In the description of the present invention, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present invention; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative 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 in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present invention.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A hemi-elbow joint prosthesis comprising:

a humerus stem (10) comprising a connecting seat (11) and a first stem body (12) connected to said connecting seat (11);

a connecting neck (20) detachably connected to the connecting seat (11);

a connection assembly (30) comprising an assembly part (31) and a connection column (32), wherein the assembly part (31) comprises a first assembly hole (311) and a second assembly hole (312), one of the assembly part (31) and the connection column (32) is arranged on the connection seat (11), the other of the assembly part (31) and the connection column (32) is arranged on the connection neck (20), and the connection column (32) is inserted into the first assembly hole (311) or the second assembly hole (312);

-a locking structure (40) arranged between said connecting post (32) and said connecting seat (11) or between said connecting post (32) and said connecting neck (20);

a pulley structure (50) connected to the connecting neck (20);

wherein the axis of the first assembly hole (311) and the axis of the second assembly hole (312) are arranged in parallel.

2. The hemi-elbow joint prosthesis according to claim 1 wherein the first and second mounting holes (311, 312) are disposed on the connection block (11) and the connection post (32) is disposed on the connection neck (20), the axis of the first mounting hole (311) and the centerline of the connection block (11) having a first distance therebetween and the axis of the second mounting hole (312) and the axis of the connection block (11) having a second distance therebetween.

3. The hemi-elbow joint prosthesis according to claim 1 wherein the connecting post (32) is a tapered post, the first mounting hole (311) is a first tapered hole and the second mounting hole (312) is a second tapered hole.

4. The hemi-elbow joint prosthesis according to claim 1, wherein the locking structure (40) comprises a first locking hole (41), a second locking hole (42) and a locking post (43), the first locking hole (41) and the second locking hole (42) are spaced on the side wall of the connection seat (11), a plurality of connection holes (321) are provided on the side wall of the connection post (32), the locking post (43) is inserted into one of the first locking hole (41) and the plurality of connection holes (321), or the locking post (43) is inserted into one of the second locking hole (42) and the plurality of connection holes (321).

5. The hemi-elbow joint prosthesis according to claim 4 further comprising a first anti-slip structure (61) and a second anti-slip structure (62), the first anti-slip structure (61) and the second anti-slip structure (62) being disposed between the locking post (43) and the connection seat (11), the first anti-slip structure (61) being disposed at the first locking aperture (41) and the second anti-slip structure (62) being disposed at the second locking aperture (42).

6. The hemi-elbow joint prosthesis according to claim 5, wherein the first anti-drop structure (61) comprises a first annular clamping groove (611) and a first notch (612) disposed at the side of the first locking hole (41) and in communication with the first annular clamping groove (611), wherein a bump (431) is disposed on the sidewall of the locking post (43), and the bump (431) is inserted into the first annular clamping groove (611) through the first notch (612) and is rotationally limited in the first annular clamping groove (611).

7. The hemi-elbow joint prosthesis according to claim 5, wherein the second anti-drop structure (62) comprises a second annular clamping groove (621) and a second notch (622) disposed at the side of the second locking hole (42) and in communication with the second annular clamping groove (621), wherein a bump (431) is disposed on the sidewall of the locking post (43), and the bump (431) is inserted into the second annular clamping groove (621) through the second notch (622) and is rotationally limited in the second annular clamping groove (621).

8. The hemi-elbow joint prosthesis according to claim 6 wherein the tab (431) is disposed at an end of the locking post (43) distal from the connecting post (32), the tab (431) extending circumferentially of the locking post (43), the end of the locking post (43) distal from the connecting post (32) being provided with an operating portion (432).

9. The hemi-elbow joint prosthesis according to claim 1 further comprising an adjustment assembly (70), the adjustment assembly (70) comprising a plurality of first slots (71) and inserts (72) disposed circumferentially spaced along the first mounting aperture (311), each of the first slots (71) having a spacing therebetween with the first mounting aperture (311), the inserts (72) and the first slots (71) being in a mating engagement, one of the first slots (71) and the inserts (72) being disposed on a side of the connection hub (11) facing the connection neck (20), the other of the first slots (71) and the inserts (72) being disposed on a side of the connection neck (20) facing the connection hub (11).

10. The hemi-elbow joint prosthesis according to claim 9 wherein the adjustment assembly (70) further comprises a plurality of second slots (73), a plurality of the second slots (73) being disposed circumferentially spaced along the second mounting aperture (312), each of the second slots (73) being spaced from the second mounting aperture (312), the first slots (71) and the second slots (73) being disposed on the connection hub (11), the insert (72) being disposed on the connection neck (20), the insert (72) and the insert (72) being in a plug-in fit.

11. The hemi-elbow joint prosthesis according to claim 1 wherein the connecting neck (20) comprises a base (21), a first connecting arm (22) and a second connecting arm (23), the first connecting arm (22) and the second connecting arm (23) are connected to the base (21), the base (21) and the connecting seat (11) are disposed in a stacked arrangement, the connecting assembly (30) is disposed between the base (21) and the connecting seat (11), and the first connecting arm (22) and the second connecting arm (23) are connected to the sled structure (50).

12. The hemi-elbow joint prosthesis according to claim 11 wherein the sled structure (50) is provided with a first mounting aperture (51) and a second mounting aperture (52), the first connecting arm (22) being inserted into the first mounting aperture (51) and the second connecting arm (23) being inserted into the second mounting aperture (52).

13. The hemi-elbow joint prosthesis according to claim 1 wherein the humeral stem (10) further comprises a second stem (13), the second stem (13) having a length less than the first stem (12), the second stem (13) and the first stem (12) being spaced apart, the second stem (13) being provided with a plurality of bone grafting cartridges (131) spaced apart on a side thereof facing the first stem (12), the first stem (12) being provided with a plurality of grooves (121) spaced apart on a side thereof facing away from the second stem (13); one side of the first rod body (12) far away from the groove (121) is provided with a first limiting surface (122) and a second limiting surface (123), and an obtuse included angle is formed between the first limiting surface (122) and the second limiting surface (123).