CN222929886U

CN222929886U - Interbody fusion cage

Info

Publication number: CN222929886U
Application number: CN202421665705.0U
Authority: CN
Inventors: 游新茂; 姚力军; 徐佳乐; 张桐滨; 周文; 王一成; 张茜垚; 王凌; 王楠锋
Original assignee: Ningbo Zhaoying Medical Instrument Co ltd
Current assignee: Ningbo Zhaoying Medical Instrument Co ltd
Priority date: 2024-07-15
Filing date: 2024-07-15
Publication date: 2025-06-03
Anticipated expiration: 2034-07-15

Abstract

The utility model belongs to the technical field of medical devices, and discloses an intervertebral fusion device. The intervertebral fusion device includes a fusion device body, a support assembly, a connecting assembly and a fixing assembly. The support assembly is rotatably connected to the fusion device body; the connecting assembly is transmission-connected to the support assembly; the fixing assembly is transmission-connected to the connecting assembly, and the support assembly is rotated to drive the connecting assembly to rotate, thereby driving the fixing assembly to retract or pass out of the fusion device body, so that the fixing assembly is located in the initial position or in a position fixed between two vertebrae. After the intervertebral fusion device is implanted in the human body, it will not loosen or shift, which improves the surgical effect and postoperative recovery effect, and makes the patient more comfortable to wear.

Description

Interbody fusion cage

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a fusion device.

Background

Spinal fusion is a common spinal surgery and is mainly used for treating diseases such as unstable spine, spondylolisthesis, spinal tumor and the like. An intervertebral cage is a commonly used surgical instrument for spinal fusion, which is primarily intended to form a stable support between two vertebral bodies of the spinal column to facilitate fusion of the spinal column. In the field of orthopedic medical devices, various types of interbody fusion cage are widely used in clinic to meet different surgical needs.

After the existing interbody fusion cage is implanted into a human body, in the use process, the phenomenon that the cage is loosened or shifted possibly occurs along with the movement of a patient, so that the operation effect can be influenced, the postoperative recovery of the patient is hindered, pain and discomfort of the patient can be caused, and the wearing comfort of the patient is influenced.

Disclosure of utility model

The utility model aims to provide an intervertebral fusion device, which solves the problems that the intervertebral fusion device is loosened or shifted after being implanted into a human body, thereby affecting the operation effect, preventing the postoperative recovery of a patient and causing pain and discomfort of the patient.

To achieve the purpose, the utility model adopts the following technical scheme:

There is provided an intervertebral cage capable of acting between two vertebral bodies of a spinal column, the intervertebral cage comprising:

A cage body;

the support component is rotationally connected to the fusion device body;

the connecting component is in transmission connection with the supporting component;

The fixing component is in transmission connection with the connecting component and rotates the supporting component so as to drive the connecting component to rotate, thereby driving the fixing component to retract or penetrate through the fusion device body, and enabling the fixing component to be located at an initial position or a position fixed between two vertebrae.

Preferably, the support assembly comprises a support member provided with a first end and a second end, the fusion device is provided with a first connecting portion and a second connecting portion, the first end is arranged on one of the first connecting portion and the second connecting portion, and the second end penetrates through the other one of the first connecting portion and the second connecting portion.

Preferably, the end part of the second end is provided with an operation part, the fusion device body is provided with a groove, and the operation part is rotationally arranged in the groove.

Preferably, the support assembly further comprises an elastic member and a clamping member, the elastic member is arranged between the operation portion and the clamping member, the groove is provided with a clamping portion, the support member is rotated, the clamping member can slide in the groove, and can be clamped in the clamping portion under the action of elastic force of the elastic member, so that the fixing assembly is fixed in a state that the fixing assembly penetrates out of the fusion device body.

Preferably, the operation part is provided with a first placing groove and a second placing groove, the elastic piece is placed in the first placing groove, and at least part of the clamping piece is placed in the second placing groove.

Preferably, the operation portion is provided with an operation groove for cooperating with an operation tool to rotate the support assembly.

Preferably, the connecting assembly comprises a connecting piece, a first rotating piece and a second rotating piece, and the fixing assembly comprises a first fixing piece and a second fixing piece;

The connecting piece is fixedly connected with the supporting component, one end of the connecting piece is sequentially hinged with a first rotating piece and a first fixing piece, and the other end of the connecting piece is sequentially hinged with a second rotating piece and a second fixing piece;

the supporting component drives the connecting piece to rotate along a first direction, so that the first rotating piece and the second rotating piece respectively drive the first fixing piece and the second fixing piece to move oppositely, retract into the fusion device body and are positioned at an initial position;

The supporting component drives the connecting piece to rotate along a second direction, so that the first rotating piece and the second rotating piece respectively drive the first fixing piece and the second fixing piece to move away from each other, penetrate out of the fusion device body and are in a state of being fixed between two vertebral bodies.

Preferably, the fusion device body is internally provided with a first sliding groove, the first fixing piece and the second fixing piece respectively comprise a first sliding block and a second sliding block, and the first sliding block and the second sliding block can both slide in the first sliding groove.

Preferably, the connection between the connecting piece and the supporting component is welding.

Preferably, a second sliding groove is formed in the fusion device body, and the connecting assembly can slide in the second sliding groove.

The utility model has the beneficial effects that:

The utility model provides an intervertebral fusion device which comprises a fusion device body, a supporting component, a connecting component and a fixing component. In the process of performing the spinal fusion, the supporting component is rotated, and the supporting component drives the connecting component to rotate, so that the connecting component drives the fixing component to retract or penetrate through the fusion device body, and the fixing component is positioned at an initial position or a position fixed between two vertebrae. When the support component is rotated to enable the fixing component to be located at an initial position, the fixing component is retracted into the fusion cage body, a doctor can conveniently operate the interbody fusion cage and implant the interbody fusion cage into a human body, after the interbody fusion cage is implanted into the human body, the support component is rotated to enable the fixing component to penetrate through the fusion cage body, the fixing component penetrates through two vertebral bodies to fix the interbody fusion cage between the two vertebral bodies, and at the moment, the fixing component is located at a position fixed between the two vertebral bodies. The fixing component can penetrate through the fusion cage body and is located at the position between the two vertebral bodies, so that the intervertebral fusion cage is implanted into a human body and cannot be loosened or displaced, the operation effect and the postoperative recovery effect are improved, and the comfort level of the patient wearing the intervertebral fusion cage is high.

Drawings

FIG. 1 is a schematic view of an interbody cage according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a support assembly, a connection assembly and a fixing assembly according to an embodiment of the present utility model;

FIG. 3 is a side view of a cage body provided in an embodiment of the present utility model;

FIG. 4 is a cross-sectional view taken along the direction A-A in FIG. 3;

FIG. 5 is a cross-sectional view taken along the direction B-B in FIG. 3;

fig. 6 is a cross-sectional view of a connection portion provided by an embodiment of the present utility model.

In the figure:

1. The fusion device comprises a fusion device body, a first connecting part, a second connecting part, a 13, a groove, a 131, a clamping part, a 14, a first chute, a 15 and a second chute;

21. The device comprises a supporting piece, 211, an operating part, 2111, a first placing groove, 2112, a second placing groove, 2113, an operating groove, 22, an elastic piece, 23 and a clamping piece;

31. a connecting piece; 32, a first rotating member, 33, a second rotating member;

41. First fixing piece 411, first fixing body 412, first sliding block 42, second fixing piece 421, second fixing body 422 and second sliding block.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may, for example, be fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, directly connected, indirectly connected through an intervening medium, or in communication between two elements or in an interaction relationship between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

As shown in fig. 1 to 6, the present embodiment provides an intervertebral cage that can act between two vertebral bodies of the spine to serve as a support for the two vertebral bodies.

In some embodiments, the interbody cage includes a cage body 1, a support assembly, a connection assembly, and a fixation assembly. The support component is rotationally connected to the fusion device body 1, the connecting component is in transmission connection with the support component, the fixing component is in transmission connection with the connecting component, and the support component is rotated to drive the connecting component to rotate, so that the fixing component is driven to retract or penetrate through the fusion device body 1, and the fixing component is located at an initial position or a position fixed between two vertebrae. In this embodiment, the interbody fusion cage is a contoured structure similar to the shape of a vertebral body, so that the comfort level of wearing the interbody fusion cage by a patient is high after the interbody fusion cage is implanted into a human body.

In the process of performing the spinal fusion, the supporting component is rotated, and the supporting component drives the connecting component to rotate, so that the connecting component drives the fixing component to retract or penetrate through the fusion cage body 1, and the fixing component is located at an initial position or a position fixed between two vertebrae. When the support component is rotated to enable the fixing component to be located at the initial position, the fixing component is retracted into the fusion cage body 1, a doctor can conveniently operate the interbody fusion cage and implant the interbody fusion cage into a human body, after the interbody fusion cage is implanted into the human body, the support component is rotated to enable the fixing component to penetrate through the fusion cage body 1, and the fixing component penetrates through two vertebral bodies to fix the interbody fusion cage between the two vertebral bodies, and at the moment, the fixing component is located at a position fixed between the two vertebral bodies. The fixing component can penetrate through the fusion cage body 1 and is located at a position fixed between two vertebral bodies, so that after the intervertebral fusion cage is implanted into a human body, looseness or displacement cannot occur, the operation effect and the postoperative recovery effect are improved, and the comfort level of wearing of a patient is high.

As shown in fig. 2 and 4, the support assembly includes a support 21, the support 21 is provided with a first end and a second end, the fusion device includes a first connection portion 11 and a second connection portion 12, the first end is provided at one of the first connection portion 11 and the second connection portion 12, and the second end is penetrated at the other of the first connection portion 11 and the second connection portion 12. In this embodiment, since the cage body 1 has the hollow bone grafting window, the hollow bone grafting window is located between the first connecting portion 11 and the second connecting portion 12, the first connecting portion 11 and the second connecting portion 12 have a certain thickness, and the portion of the supporting component is disposed in the first connecting portion 11 and the second connecting portion 12, so that the connection between the supporting component and the cage body 1 is more stable.

In order to facilitate the doctor to rotate the support member 21 during the operation, the second end has an operation portion 211, the cage body 1 is provided with a groove 13, and the operation portion 211 is rotatably provided in the groove 13. The rotation of the support 21 can drive the connecting assembly to rotate, so as to drive the fixing assembly to retract or penetrate through the fusion cage body 1, and the fixing assembly is positioned at an initial position or a position fixed between two vertebrae.

As shown in fig. 2, 3 and 6, in order to fix the connection state between the fusion device and the vertebral body after the fixing component passes through the fusion device and is connected to the vertebral body, the supporting component further includes an elastic component 22 and a clamping component 23, the elastic component 22 is disposed between the operation portion 211 and the clamping component 23, the groove 13 has a clamping portion 131, the supporting component 21 is rotated, the clamping component 23 can slide in the groove 13, and can be clamped to the clamping portion 131 under the elastic force of the elastic component 22, so as to maintain the state that the fixing component passes through the fusion device body 1. Specifically, the elastic member 22 is a spring, during the operation, when the fixing component is required to be located at the initial position, the supporting member 21 can be rotated to enable the clamping member 23 to slide in the groove 13, the elastic member 22 is compressed at the moment, when the supporting member 21 is rotated to enable the fixing component to extend out of the fusion cage body 1 so as to fix the interbody fusion cage and the vertebral bodies, namely, when the fixing component is located at a position fixed between the two vertebral bodies, the clamping member 23 slides in the clamping portion 131, at the moment, the elastic member 22 is restored to deform, so that the clamping member 23 is abutted in the clamping portion 131, the state that the fixing component penetrates out of the fusion cage body 1 is fixed, and further, the direct connection between the interbody fusion cage and the vertebral bodies is more stable.

Further, in order to facilitate the arrangement of the elastic member 22 and the engaging member 23 in the operation portion 211, the operation portion 211 has a first placement groove 2111 and a second placement groove 2112, the elastic member 22 is disposed in the first placement groove 2111, and at least a portion of the engaging member 23 is disposed in the second placement groove 2112.

Preferably, in order to facilitate the operation of the tool to the operation portion 211 so as to rotate the support member 21, the operation portion 211 is provided with an operation groove 2113, and the operation groove 2113 is adapted to cooperate with the operation tool to rotate the support member.

As shown in fig. 1 and 2, the connecting assembly comprises a connecting piece 31, a first rotating piece 32 and a second rotating piece 33, the fixing assembly comprises a first fixing piece 41 and a second fixing piece 42, the connecting piece 31 is fixedly connected with the supporting assembly, one end of the connecting piece 31 is sequentially hinged with the first rotating piece 32 and the first fixing piece 41, the other end of the connecting piece 31 is sequentially hinged with the second rotating piece 33 and the second fixing piece 42, the supporting assembly drives the connecting piece 31 to rotate along a first direction, so that the first rotating piece 32 and the second rotating piece 33 drive the first fixing piece 41 and the second fixing piece 42 to move oppositely and retract into the fusion device body 1 and are located at an initial position, and the supporting assembly drives the connecting piece 31 to rotate along a second direction, so that the first rotating piece 32 and the second rotating piece 33 drive the first fixing piece 41 and the second fixing piece 42 to move away from each other and penetrate out of the fusion device body 1 and are fixed between two vertebrae. Specifically, the first direction is clockwise and the second direction is counterclockwise.

In this embodiment, the connecting member 31 is a connecting rod, the first rotating member 32 and the second rotating member 33 are a first rotating rod and a second rotating rod, respectively, the connecting member 31, the first rotating member 32, the second rotating member 33, the first fixing member 41 and the second fixing member 42 are connected to form a connecting rod mechanism, the connecting member 31 is fixedly connected with the supporting component, and the rotation of the supporting component can be converted into the linear motion of the first fixing member 41 and the second fixing member 42 through the connecting member 31, the first rotating member 32 and the second rotating member 33. The connection between the connecting piece 31 and the support assembly is by welding. The connection member 31 and the first rotation member 32, the connection member 31 and the second rotation member 33, the first rotation member 32 and the first fixing member 41, and the second rotation member 33 and the second fixing member 42 are hinged by screws and nuts. Preferably, in order to prevent the connection member 31, the first rotation member 32, the second rotation member 33, the first fixing member 41, and the second fixing member 42 from being loosened between the screw and the nut during the movement, the screw and the nut may be fixed by the thread glue. Specifically, a set of connection components and fixing components are respectively arranged at the first end and the second end of the supporting component 21, so that the fixing components are more stable when fixing the vertebral bodies at the two ends of the interbody fusion cage.

As shown in fig. 4 and 5, further, in order to make the movement of the fixing assembly more stable, the first chute 14 is provided in the cage body 1, and the first fixing member 41 and the second fixing member 42 respectively include a first slider 412 and a second slider 422, and both the first slider 412 and the second slider 422 can slide in the first chute 14. Specifically, the first fixing member 41 includes a first fixing body 411 and a first slider 412, the first fixing body 411 is connected with the first slider 412, the first fixing body 411 is used for fixing a vertebral body on one side of the interbody fusion device, the second fixing member 42 includes a second fixing body 421 and a second slider 422, the second fixing body 421 is connected with the second slider 422, and the second fixing body 421 is used for fixing a vertebral body on the other side of the interbody fusion device.

In order to facilitate the sliding of the connection assembly in the cage body 1, a second chute 15 is provided in the cage body 1, and the connection assembly can slide in the second chute 15.

Preferably, the supporting component, the connecting component and the fixing component are all made of stainless steel, or the supporting component, the connecting component and the fixing component are all made of titanium alloy.

When the intervertebral fusion device is used, a doctor can rotate the supporting component along a second direction to enable the fixing component to retract into the fusion device body 1 so as to facilitate operation, after the implantation operation is finished, the doctor can rotate the supporting component along a first direction to enable the fixing component to extend out of the fusion device body 1 so as to fix the intervertebral fusion device on vertebral bodies on two sides of the intervertebral fusion device, and when the intervertebral fusion device needs to be dismantled, the doctor can rotate the supporting component along the second direction so as to enable the fixing component to retract into the fusion device body 1 so as to facilitate the dismantling of the intervertebral fusion device.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims

1. An intervertebral fusion cage, which can act between two vertebral bodies of a spine, characterized in that the intervertebral fusion cage comprises:

Fusion device body (1);

A support assembly, rotatably connected to the fusion device body (1);

A connecting assembly, drivingly connected to the supporting assembly;

The fixing component is in driving connection with the connecting component, and rotates the supporting component to drive the connecting component to rotate, thereby driving the fixing component to retract or pass out of the fusion device body (1), so that the fixing component is located at an initial position or at a position fixed between the two vertebrae.

2. The intervertebral fusion device according to claim 1 is characterized in that the support assembly includes a support member (21), the support member (21) is provided with a first end and a second end, the fusion device is provided with a first connecting portion (11) and a second connecting portion (12), the first end is arranged at one of the first connecting portion (11) and the second connecting portion (12), and the second end passes through the other of the first connecting portion (11) and the second connecting portion (12).

3. The intervertebral fusion device according to claim 2 is characterized in that the end portion of the second end has an operating portion (211), a groove (13) is provided on the fusion device body (1), and the operating portion (211) is rotatably disposed in the groove (13).

4. The intervertebral fusion device according to claim 3 is characterized in that the support assembly also includes an elastic member (22) and a clamping member (23), the elastic member (22) is arranged between the operating portion (211) and the clamping member (23), the groove (13) has a clamping portion (131), and when the support member (21) is rotated, the clamping member (23) can slide in the groove (13) and can be clamped in the clamping portion (131) under the action of the elastic force of the elastic member (22) to fix the state of the fixing assembly passing through the fusion device body (1).

5. The intervertebral fusion device according to claim 4 is characterized in that the operating part (211) has a first placement groove (2111) and a second placement groove (2112), the elastic member (22) is placed in the first placement groove (2111), and at least a part of the clamping member (23) is placed in the second placement groove (2112).

6. The intervertebral fusion device according to claim 3, characterized in that an operating groove (2113) is provided on the operating portion (211), and the operating groove (2113) is used to cooperate with an operating tool to rotate the support assembly.

7. The intervertebral fusion cage according to claim 1, characterized in that the connecting assembly comprises a connecting member (31), a first rotating member (32) and a second rotating member (33), and the fixing assembly comprises a first fixing member (41) and a second fixing member (42);

The connecting member (31) is fixedly connected to the supporting assembly, one end of the connecting member (31) is hingedly connected to a first rotating member (32) and a first fixed member (41) in sequence, and the other end of the connecting member (31) is hingedly connected to a second rotating member (33) and a second fixed member (42) in sequence;

The support assembly drives the connecting member (31) to rotate along a first direction, so that the first rotating member (32) and the second rotating member (33) respectively drive the first fixing member (41) and the second fixing member (42) to move toward each other, retract into the fusion device body (1), and be in an initial state;

The support assembly drives the connecting member (31) to rotate along the second direction, so that the first rotating member (32) and the second rotating member (33) respectively drive the first fixing member (41) and the second fixing member (42) to move away from each other, pass through the fusion device body (1), and are fixed between the two vertebrae.

8. The intervertebral fusion device according to claim 7 is characterized in that a first slide groove (14) is provided in the fusion device body (1), and the first fixing member (41) and the second fixing member (42) respectively include a first slider (412) and a second slider (422), and the first slider (412) and the second slider (422) can both slide in the first slide groove (14).

9. The intervertebral fusion cage according to claim 7, characterized in that the connection between the connecting member (31) and the supporting assembly is by welding.

10. The intervertebral fusion cage according to any one of claims 1 to 9, characterized in that a second slide groove (15) is provided in the cage body (1), and the connecting assembly can slide in the second slide groove (15).