Interbody fusion cage

Abstract

The utility model belongs to the technical field of medical instruments, and discloses an interbody fusion cage. The interbody fusion cage comprises a fusion cage body, a supporting assembly, a connecting assembly and a fixing assembly. The supporting assembly is rotationally connected to the fusion cage body; the connecting assembly is in transmission connection with the supporting assembly; the fixing assembly is in transmission connection with the connecting assembly, and the supporting assembly is rotated to drive the connecting assembly to rotate, so that the fixing assembly is driven to retract or penetrate out of the fusion cage body, and the fixing assembly is located at the initial position or located at the position fixed between the two vertebral bodies. After the interbody fusion cage is implanted into a human body, the interbody fusion cage cannot loosen or displace, the operation effect and the postoperative recovery effect are improved, and the wearing comfort of a patient is high.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a fusion device. Background Art

[0002] Spinal fusion is a common spinal surgery, mainly used to treat diseases such as spinal instability, spondylolisthesis, and spinal tumors. An intervertebral fusion cage is a commonly used spinal fusion surgical instrument, and its main function is to form a stable support between two vertebral bodies of the spine to promote spinal fusion. In the field of orthopedic medical devices, various types of intervertebral fusion cages are widely used in clinical practice to meet different surgical needs.

[0003] After the existing intervertebral fusion cage is implanted into the human body, during use, the fusion cage may loosen or shift as the patient moves. This not only affects the surgical effect, hinders the patient's postoperative recovery, but may also cause pain and discomfort to the patient, affecting the patient's wearing comfort. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an intervertebral fusion cage to solve the problems that the intervertebral fusion cage loosens or shifts after being implanted into the human body, thereby affecting the surgical effect, hindering the patient's postoperative recovery, and causing pain and discomfort to the patient.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] Provide an intervertebral fusion cage that can act between two vertebral bodies of the spine. The intervertebral fusion cage includes:

[0007] A fusion cage body;

[0008] A support assembly rotatably connected to the fusion cage body;

[0009] A connection assembly drivingly connected to the support assembly;

[0010] A fixing assembly drivingly connected to the connection assembly. Rotating the support assembly drives the connection assembly to rotate, thereby driving the fixing assembly to retract or protrude from the fusion cage body, so that the fixing assembly is in the initial position or in a position fixed between the two vertebral bodies.

[0011] Preferably, the support assembly includes a support member provided with a first end and a second end. The fusion cage is provided with a first connection portion and a second connection portion. The first end is disposed on one of the first connection portion and the second connection portion, and the second end protrudes from the other of the first connection portion and the second connection portion.

[0012] Preferably, an operating part is provided at the end of the second end, a groove is provided on the fusion device body, and the operating part is rotatably arranged in the groove.

[0013] Preferably, the support assembly further includes an elastic member and a clamping member. The elastic member is arranged between the operating part and the clamping member. The groove has a clamping part. By rotating the support member, the clamping member can slide in the groove and can be clamped in the clamping part under the action of the elastic force of the elastic member to fix the state where the fixing assembly penetrates out of the fusion device body.

[0014] Preferably, the operating part has a first placement groove and a second placement groove. The elastic member is placed in the first placement groove, and at least part of the clamping member is placed in the second placement groove.

[0015] Preferably, an operating groove is provided on the operating part, and the operating groove is used to cooperate with an operating tool to rotate the support assembly.

[0016] Preferably, the connection assembly includes a connecting member, a first rotating member and a second rotating member, and the fixing assembly includes a first fixing member and a second fixing member;

[0017] The connecting member is fixedly connected to the support assembly. One end of the connecting member is sequentially hinged with a first rotating member and a first fixing member, and the other end of the connecting member is sequentially hinged with a second rotating member and a second fixing member;

[0018] The support assembly drives the connecting member to rotate in a first direction, so that the first rotating member and the second rotating member respectively drive the first fixing member and the second fixing member to move towards each other, retract into the fusion device body, and be in an initial position;

[0019] The support assembly drives the connecting member to rotate in a second direction, so that the first rotating member and the second rotating member respectively drive the first fixing member and the second fixing member to move away from each other, penetrate out of the fusion device body, and be in a state of being fixed between the two vertebral bodies.

[0020] Preferably, a first sliding groove is provided in the fusion device body. The first fixing member and the second fixing member respectively include a first sliding block and a second sliding block, and both the first sliding block and the second sliding block can slide in the first sliding groove.

[0021] Preferably, the connection mode between the connecting member and the support assembly is welding.

[0022] Preferably, a second sliding groove is provided in the fusion device body, and the connection assembly can slide in the second sliding groove.

[0023] The beneficial effects of the present utility model:

[0024] The utility model provides an intervertebral fusion device, which comprises a fusion device body, a support assembly, a connection assembly and a fixing assembly. During the process of spinal fusion, the support assembly is rotated, and the support assembly drives the connection assembly to rotate, so that the connection assembly drives the fixing assembly to retract or protrude from the fusion device body, and the fixing assembly is located at the initial position or at the position fixed between two vertebral bodies. When the support assembly is rotated to make the fixing assembly located at the initial position, the fixing assembly retracts into the fusion device body, which is convenient for doctors to operate the intervertebral fusion device and implant the intervertebral fusion device into the human body. After the intervertebral fusion device is implanted into the human body, the support assembly is rotated to make the fixing assembly protrude from the fusion device body, and the fixing assembly penetrates into the two vertebral bodies to fix the intervertebral fusion device between the two vertebral bodies. At this time, the fixing assembly is located at the position fixed between the two vertebral bodies. The fixing assembly can protrude from the fusion device body and be located at the position fixed between the two vertebral bodies, so that after the intervertebral fusion device is implanted into the human body, loosening or displacement will not occur, the surgical effect and the postoperative recovery effect are improved, and the wearing comfort of the patient is relatively high. Description of the Drawings

[0025] Figure 1 is a schematic structural diagram of the intervertebral fusion device provided by an embodiment of the utility model;

[0026] Figure 2 is a schematic structural diagram of the support assembly, the connection assembly and the fixing assembly provided by an embodiment of the utility model;

[0027] Figure 3 is a side view of the fusion device body provided by an embodiment of the utility model;

[0028] Figure 4 is Figure 3 a cross-sectional view taken along the A-A direction in

[0029] Figure 5 is Figure 3 a cross-sectional view taken along the B-B direction in

[0030] Figure 6 is a cross-sectional view of the connection part provided by an embodiment of the utility model.

[0031] In the figure:

[0032] 1. Fusion device body; 11. First connection part; 12. Second connection part; 13. Groove; 131. Clamping part; 14. First sliding groove; 15. Second sliding groove;

[0033] 21. Support member; 211. Operating part; 2111. First placement groove; 2112. Second placement groove; 2113. Operating groove; 22. Elastic member; 23. Clamping member;

[0034] 31. Connector; 32. First rotating member; 33. Second rotating member;

[0035] 41. First fixing member; 411. First fixing body; 412. First slider; 42. Second fixing member; 421. Second fixing body; 422. Second slider. Detailed implementation mode

[0036] The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that for the sake of description, only the parts related to the present utility model rather than all the structures are shown in the drawings.

[0037] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0038] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "above", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or only means that the first feature is at a higher horizontal height than the second feature. The first feature being "below", "below", and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or only means that the first feature is at a lower horizontal height than the second feature.

[0039] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meanings.

[0040] As Figures 1 to 6 shown, this embodiment provides an intervertebral fusion device that can act between two vertebral bodies of the spine to play a role in supporting the two vertebral bodies.

[0041] In some embodiments, the intervertebral fusion device includes a fusion device body 1, a support assembly, a connection assembly, and a fixing assembly. The support assembly is rotatably connected to the fusion device body 1; the connection assembly is in transmission connection with the support assembly; the fixing assembly is in transmission connection with the connection assembly. By rotating the support assembly, the connection assembly is driven to rotate, thereby driving the fixing assembly to retract or protrude from the fusion device body 1, so that the fixing assembly is in an initial position or in a position fixed between two vertebral bodies. In this embodiment, the intervertebral fusion device has a profiling structure similar to the shape of the vertebral body, so that after the intervertebral fusion device is implanted into the human body, the wearing comfort of the patient is relatively high.

[0042] During the process of performing spinal fusion, the support assembly is rotated, and the support assembly drives the connection assembly to rotate, so that the connection assembly drives the fixing assembly to retract or protrude from the fusion device body 1, so that the fixing assembly is in an initial position or in a position fixed between two vertebral bodies. When the support assembly is rotated to make the fixing assembly in the initial position, the fixing assembly retracts into the fusion device body 1, which is convenient for the doctor to operate the intervertebral fusion device and implant the intervertebral fusion device into the human body; after the intervertebral fusion device is implanted into the human body, the support assembly is rotated to make the fixing assembly protrude from the fusion device body 1, and the fixing assembly penetrates into the two vertebral bodies to fix the intervertebral fusion device between the two vertebral bodies. At this time, the fixing assembly is in a position fixed between the two vertebral bodies. The fixing assembly can protrude from the fusion device body 1 and be in a position fixed between the two vertebral bodies, so that after the intervertebral fusion device is implanted into the human body, loosening or displacement will not occur, improving the surgical effect and the postoperative recovery effect, and making the wearing comfort of the patient relatively high.

[0043] As Figure 2 and Figure 4 As shown in and , 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 includes a first connection portion 11 and a second connection portion 12. The first end is disposed on one of the first connection portion 11 and the second connection portion 12, and the second end protrudes from the other of the first connection portion 11 and the second connection portion 12. In this embodiment, since the fusion device body 1 has a hollow bone graft window, the hollow bone graft window is located between the first connection portion 11 and the second connection portion 12, and the first connection portion 11 and the second connection portion 12 have a certain thickness. A part of the support assembly is disposed inside the first connection portion 11 and the second connection portion 12, making the connection between the support assembly and the fusion device body 1 more stable.

[0044] To facilitate the doctor to rotate the support member 21 during the operation, the end of the second end has an operation portion 211, and a groove 13 is provided on the fusion device body 1. The operation portion 211 is rotatably disposed in the groove 13. Rotating the support member 21 can drive the connection assembly to rotate, thereby driving the fixing assembly to retract or protrude from the fusion device body 1, so that the fixing assembly is in an initial position or in a position fixed between two vertebral bodies.

[0045] As Figure 2, Figure 3 and Figure 6 As shown in Figure 3 and Figure 6 , in order to fix the connection state of the fusion device and the vertebral body after the fixing component passes through the fusion device and is connected to the vertebral body, the support component further includes an elastic member 22 and a clamping member 23. The elastic member 22 is disposed between the operation portion 211 and the clamping member 23. The groove 13 has a clamping portion 131. By rotating the support member 21, 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 maintain the state where 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 needs to be in the initial position, the support member 21 can be rotated to make the clamping member 23 slide in the groove 13, and at this time the elastic member 22 is compressed; when the support member 21 is rotated to make the fixing component extend out of the fusion device body 1 to fix the intervertebral fusion device and the vertebral body, that is, when the fixing component is located at a position fixed between two vertebral bodies, the clamping member 23 slides in the clamping portion 131. At this time, the elastic member 22 resumes deformation, so that the clamping member 23 abuts in the clamping portion 131, and the state where the fixing component passes through the fusion device body 1 is fixed, thereby making the connection between the intervertebral fusion device and the vertebral body more stable.

[0046] Further, in order to facilitate the arrangement of the elastic member 22 and the clamping member 23 on 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 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.

[0047] Preferably, in order to facilitate the operation tool to act on the operation portion 211 so as to rotate the support member 21, an operation groove 2113 is provided on the operation portion 211. The operation groove 2113 is used to cooperate with the operation tool to rotate the support component.

[0048] As Figure 1 and Figure 2As shown, the connection component includes a connecting member 31, a first rotating member 32 and a second rotating member 33, and the fixing component includes a first fixing member 41 and a second fixing member 42; the connecting member 31 is fixedly connected to the support component, and one end of the connecting member 31 is successively hinged to the first rotating member 32 and the first fixing member 41; the other end of the connecting member 31 is successively hinged to the second rotating member 33 and the second fixing member 42; the support component drives the connecting member 31 to rotate in the first direction, so that the first rotating member 32 and the second rotating member 33 drive the first fixing member 41 and the second fixing member 42 to move towards each other, retract into the fusion device body 1, and be in the initial position; the support component drives the connecting member 31 to rotate in the second direction, so that the first rotating member 32 and the second rotating member 33 drive the first fixing member 41 and the second fixing member 42 to move away from each other, penetrate out of the fusion device body 1, and be in a state of being fixed between two vertebral bodies. Specifically, the first direction is the clockwise direction and the second direction is the counterclockwise direction.

[0049] In this embodiment, the connecting member 31 is a connecting rod, the first rotating member 32 and the second rotating member 33 are respectively a first rotating rod and a second rotating rod, and 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 linkage mechanism. The connecting member 31 is fixedly connected to the support component, and the rotation of the support 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 mode between the connecting member 31 and the support component is welding. The connecting member 31 and the first rotating member 32, the connecting member 31 and the second rotating member 33, the first rotating member 32 and the first fixing member 41, and the second rotating member 33 and the second fixing member 42 are all hinged by screws and nuts. Preferably, in order to prevent the screws and nuts from loosening during the movement of 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, the screws and nuts can be fixed by thread glue. Specifically, a set of connection components and fixing components are respectively provided at the first end and the second end of the support member 21, so that the fixing component is more stable when fixing the vertebral bodies at both ends of the intervertebral fusion device.

[0050] As Figure 4 and Figure 5As shown in the figure, further, in order to make the movement of the fixing component more stable, a first sliding groove 14 is provided in the body 1 of the fusion device. The first fixing member 41 and the second fixing member 42 respectively include a first sliding block 412 and a second sliding block 422, and both the first sliding block 412 and the second sliding block 422 can slide in the first sliding groove 14. Specifically, the first fixing member 41 includes a first fixing body 411 and a first sliding block 412. The first fixing body 411 is connected to the first sliding block 412, and the first fixing body 411 is used to fix the vertebral body on one side of the intervertebral fusion device; the second fixing member 42 includes a second fixing body 421 and a second sliding block 422. The second fixing body 421 is connected to the second sliding block 422, and the second fixing body 421 is used to fix the vertebral body on the other side of the intervertebral fusion device.

[0051] In order to facilitate the sliding of the connecting component in the body 1 of the fusion device, a second sliding groove 15 is provided in the body 1 of the fusion device, and the connecting component can slide in the second sliding groove 15.

[0052] Preferably, the materials of the supporting component, the connecting component and the fixing component are all stainless steel; or, the materials of the supporting component, the connecting component and the fixing component are all titanium alloy.

[0053] During the use of the intervertebral fusion device, when performing an operation to implant the intervertebral fusion device into the human body, the doctor can rotate the supporting component in the second direction to retract the fixing component into the body 1 of the fusion device, so as to facilitate the operation; after the implantation operation is completed, the doctor can rotate the supporting component in the first direction to extend the fixing component out of the body 1 of the fusion device, so as to fix the intervertebral fusion device on the vertebral bodies on both sides of the intervertebral fusion device; when it is necessary to remove the intervertebral fusion device, the doctor can rotate the supporting component in the second direction to retract the fixing component into the body 1 of the fusion device, so as to facilitate the removal of the intervertebral fusion device.

[0054] Obviously, the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. An intervertebral fusion device, which can act between two vertebral bodies of the 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 cage according to claim 1, characterized in that: The support assembly comprises a support member (21), wherein the support member (21) is provided with a first end and a second end, and the fusion device is provided with a first connecting portion (11) and a second connecting portion (12), wherein the first end is provided 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 cage according to claim 2, characterized in that: The end of the second end is provided with 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 cage according to claim 3, characterized in that: The support assembly further comprises an elastic member (22) and a snap-fit ​​member (23); the elastic member (22) is arranged between the operating portion (211) and the snap-fit ​​member (23); the groove (13) has a snap-fit ​​member (131); when the support member (21) is rotated, the snap-fit ​​member (23) can slide in the groove (13) and can be snap-fitted to the snap-fit ​​member (131) under the action of the elastic force of the elastic member (22) to fix the fixing assembly in a state where it passes through the fusion device body (1).

5. The intervertebral fusion cage according to claim 4, characterized in that: The operating portion (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 part of the clamping member (23) is placed in the second placement groove (2112).

6. The intervertebral fusion cage 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 enable the supporting assembly to rotate.

7. The intervertebral fusion cage according to claim 1, characterized in that: The connecting component comprises a connecting member (31), a first rotating member (32) and a second rotating member (33); the fixing component 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 cage according to claim 7, characterized in that: A first slide groove (14) is provided in the fusion device body (1); the first fixing member (41) and the second fixing member (42) respectively include a first slider (412) and a second slider (422); 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 piece (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 fusion device body (1), and the connecting component can slide in the second slide groove (15).

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