Interbody fusion cages and fusion cage systems

Abstract

This invention relates to the field of medical device technology and discloses an intervertebral fusion device and a fusion device system. The intervertebral fusion device includes a fusion device body and a locking assembly. An insert and a driving member are movably disposed within the fusion device body. The driving member has a cam portion. When the driving member is rotated, the cam portion can push out the insert and insert it into an adjacent vertebral body. The fusion device body can further enhance the connection with the vertebral body through the insert. After the insert is pushed out, the position of the driving member can be moved until its cam portion engages with a locking groove in the fusion device body, preventing the insert from retracting into the fusion device body after the driving member rotates back. This invention also provides a fusion device system, including an operating tool and an intervertebral fusion device. The operating tool can operate the driving member to push the insert out of the fusion device body and can also operate the driving member to move until the cam portion engages with the locking groove. This fusion device system adds an anti-retraction function, which can both restore the intervertebral height and improve the stability in the initial stage of fusion.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to an interbody fusion device and fusion device system. Background Technology

[0002] The spine, a vital supporting structure of the human body, is composed of multiple vertebrae connected by intervertebral discs and ligaments. When conditions such as spinal instability or spondylolisthesis occur, spinal fusion surgery is commonly used to treat these conditions. The principle of spinal fusion surgery is to insert a fusion device between one or more segments of the spine to stabilize the spine and reduce pain. The fusion device is typically made of biocompatible materials such as titanium alloys and polyetheretherketone (PEEK).

[0003] However, the fusion device has poor self-stability and is prone to loosening or slipping out after implantation. To improve the stability of the fusion device after implantation, the related technology has a rotating sleeve at its rear. The rotating sleeve is internally threaded with an upper pin and a lower pin. A ratchet wrench can drive the upper and lower pins inside the rotating sleeve to rotate outward, allowing the upper and lower pins to insert into the corresponding vertebral body and enhance the connection between the fusion device and the vertebral body.

[0004] However, after the pins on the upper and lower sides of the rotating sleeve are inserted into the vertebral body, there is space inside the rotating sleeve for the pins to move or retract. The pins that have been inserted into the vertebral body may be partially or completely retracted into the rotating sleeve due to the patient's range of motion or other factors, thus affecting the fixation effect of the fusion device. Summary of the Invention

[0005] Based on the above problems, the purpose of this invention is to provide an interbody fusion device and fusion device system that can not only enhance the connection between the fusion device body and the adjacent vertebral bodies, but also effectively prevent the interbody fusion device from regressing after surgery.

[0006] To achieve the above objectives, the following technical solution is provided:

[0007] In a first aspect, the present invention provides an interbody fusion device, comprising:

[0008] The fusion device body is equipped with a locking groove and is used to support the vertebral body.

[0009] The locking assembly includes an insert and a drive member movably disposed within the fusion unit body. The drive member is provided with a cam portion that abuts against the insert. The drive member can rotate until the cam portion pushes the insert out of the fusion unit body so that the insert can be inserted into the cone. The drive member can also move until the cam portion engages with a locking groove to restrict the insert from retracting into the fusion unit body.

[0010] Specifically, the fusion unit body is provided with a guide groove, which is connected to a locking groove, and the cam part is movably disposed in the guide groove.

[0011] Preferably, the driving member has an initial position and a working position, and the guide groove is provided with a first stop surface. When the driving member is in the working position, the cam part can push the insert out of the fusion body. The cam part abuts against the first stop surface to limit the driving member from continuing to rotate, and the cam part is directly opposite the locking groove.

[0012] Preferably, the guide groove is further provided with a second stop surface, and when the drive member is in the initial position, the cam part can abut against the second stop surface, and the insert is located in the fusion body.

[0013] Optionally, the locking assembly also includes a locking member detachably disposed within the fusion unit body, the locking member being able to abut against the drive member to press the cam portion against the locking groove.

[0014] Specifically, the locking component has a clearance hole, through which the operating tool can pass and drive the driving component to move. The operating tool can also be installed in the fusion unit body.

[0015] Optionally, of the operating tool and the locking member, one is provided with a first connecting protrusion, and the other is provided with a locking groove that mates with the first connecting protrusion; of the operating tool and the driving member, one is provided with a second connecting protrusion, and the other is provided with a rotating hole that mates with the second connecting protrusion.

[0016] Preferably, the fusion body is provided with a mounting hole, a limiting member is provided in the mounting hole, the insert is slidably engaged with the limiting member, the insert is provided with a limiting part, the limiting part can abut against the limiting member to prevent the insert from detaching from the fusion body.

[0017] Specifically, the fusion unit has a head and a tail, and the insert is located at the head of the fusion unit.

[0018] Secondly, the present invention also provides a fusion device system, including an operating tool and the aforementioned intervertebral fusion device. The operating tool is used to operate the driving member to push the insert out of the fusion device body, and is also used to operate the driving member to move to the cam portion to engage with the locking groove.

[0019] The beneficial effects of this invention are as follows:

[0020] This invention provides an intervertebral fusion device, comprising a fusion device body and a locking assembly. The fusion device body supports the vertebral body and maintains the original intervertebral height. An insert and a drive are movably disposed within the fusion device body. When the drive is rotated, its cam portion can push out the insert and insert it into the adjacent vertebral body. At this time, the fusion device body can further enhance the connection with the vertebral body through the insert, so that the intervertebral fusion device can maintain a relatively fixed position in the human body. After the insert is pushed out, the position of the drive can be moved until its cam portion engages in the locking groove opened in the fusion device body, preventing the insert from retracting into the fusion device body after the drive rotates. The intervertebral fusion device provided by this invention can avoid the need for secondary adjustment of the fusion device position after surgery, reducing secondary harm to the patient. The present invention also provides a fusion device system, including an operating tool and an intervertebral fusion device. The operating tool can operate a drive component to push the insert out of the fusion device body, so that the insert can be fixed in the vertebral body. It can also operate the drive component to move to the cam part and engage the locking groove, so that the cam part cannot rotate and the insert cannot retract into the fusion device body. In this fusion device system, the implantation and operation process of the intervertebral fusion device is simple and the anti-retraction function is added. After the fusion device is implanted, it can not only restore the height of the intervertebral disc, but also improve the stability in the early stage of fusion. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the interbody fusion device provided in a specific embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the locking component provided in a specific embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the structure of the fusion device body provided in a specific embodiment of the present invention;

[0025] Figure 4 yes Figure 3 Sectional view at point AA;

[0026] Figure 5 This is a cross-sectional view of the interbody fusion device when the driving component is in the initial position according to a specific embodiment of the present invention;

[0027] Figure 6This is a partial structural diagram of the interbody fusion device when the driving component is in the initial position, according to a specific embodiment of the present invention.

[0028] Figure 7 This is a cross-sectional view of the interbody fusion device when the driving component is in the working position according to a specific embodiment of the present invention;

[0029] Figure 8 This is a partial structural diagram of the intervertebral fusion device when the driving component is in the working position, according to a specific embodiment of the present invention.

[0030] In the picture:

[0031] 1. Fusion device body; 11. Locking groove; 12. Guide groove; 121. First stop surface; 122. Second stop surface; 123. Guide surface; 13. Mounting hole; 14. Limiting component; 15. Head; 16. Tail; 161. Clamping groove; 162. Threaded groove; 17. Raised tooth; 18. Bone graft window; 19. Through hole; 2. Locking assembly; 21. Embedded component; 211. Limiting part; 22. Driving component; 221. Cam part; 222. Rotating hole; 23. Locking component; 231. Clearance hole; 232. Locking groove. Detailed Implementation

[0032] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "top," "bottom," "inner," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Specifically, the terms "first connecting protrusion" and "second connecting protrusion" refer to two different connecting protrusions.

[0034] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0035] like Figures 1 to 8 As shown, the present invention provides an intervertebral fusion device, which includes a fusion device body 1 and a locking assembly 2. The locking assembly 2 includes an insert 21 and a drive member 22 movably disposed within the fusion device body 1. The insert 21 can be movably disposed within the fusion device body 1 and can be a pin. The drive member 22 can rotate and move within the fusion device body 1. The drive member 22 is provided with a cam portion 221, which is always in contact with the insert 21. During fusion surgery, the damaged area can be removed and the fusion device body 1 can be implanted between adjacent vertebrae to replace the original vertebral structure and provide support. When the drive member 22 rotates, the cam part 221 can push the insert 21 out of the fusion device body 1 and out of the fusion device body 1. At this time, the insert 21 can be inserted into the vertebral body adjacent to the fusion device body 1. The fusion device body 1 can further enhance the connection with the vertebral body through the insert 21, so that the intervertebral fusion device can maintain a relatively fixed position in the human body after implantation. The insert 21 can be set with different specifications. During the operation, the intervertebral fusion device with an appropriate size insert 21 can be selected for implantation according to the patient's condition.

[0036] To prevent the insert 21 from retracting into the fusion body 1 due to rotation of the drive member 22, the fusion body 1 is provided with a locking groove 11. The locking groove 11 matches the shape of the cam part 221. When the drive member 22 rotates to push out the insert 21, the cam part 221 is aligned with the locking groove 11. At this time, the drive member 22 can continue to move until its cam part 221 is engaged in the locking groove 11, thus preventing the insert 21 from retracting into the fusion body 1 due to rotation of the cam part 221.

[0037] Based on the implantation direction of the interbody fusion cage, such as Figure 1 and Figure 2As shown, the fusion device body 1 can be provided with a head 15 and a tail 16. The head 15 is the first part of the fusion device body 1 to enter the intervertebral space during implantation. During the operation, the doctor needs to observe the imaging device inside the intervertebral fusion device to determine the implantation position and direction. The insert 21 can be set as an imaging pin and placed on the head 15 to help the doctor more intuitively observe the position of the head 15 through imaging equipment such as X-rays, so as to adjust the position of the fusion device body 1 in a timely manner to match the physiological curve of the spine and improve the accuracy of the operation. In addition, in order to facilitate the implantation of the intervertebral fusion device and adapt to the vertebral structure of the human body, the head 15 of the fusion device body 1 can be processed into an arc-shaped surface to improve the stability in the early stage of fusion. To realize the insertion and position adjustment of the fusion device body 1, a clamping groove 161 can be provided on the tail 16 of the fusion device body 1. The clamping groove 161 can be used in conjunction with existing clamping tools.

[0038] To enhance the anti-displacement function of the fusion cage body 1 and prevent displacement of the intervertebral fusion cage during fusion, protruding teeth 17 can be provided on both the upper and lower surfaces of the fusion cage body 1. The protruding teeth 17 are oriented in the same direction, tilting from the head 15 to the tail 16 of the fusion cage body 1. The protruding teeth 17 on the upper and lower surfaces of the fusion cage body 1 can be arranged at equal intervals. Equally spaced protruding teeth 17 can ensure that the pressure distributed among the protruding teeth 17 is relatively balanced when bearing the pressure generated by body weight and spinal movement. To facilitate the implantation of the fusion cage body 1, the protruding teeth 17 on the upper and lower surfaces of the fusion cage body 1 can also be arranged such that the spacing increases from the head 15 to the tail 16. To facilitate the distinction between the upper and lower surfaces of the fusion device body 1, the protrusions 17 on the lower surface of the fusion device body 1 can be set to be evenly spaced, while the protrusions 17 on the upper surface can be set to have an increasing spacing from the head 15 to the tail 16. This arrangement can ensure that the lower surface of the fusion device body 1 is subjected to uniform force and that the upper surface is easy to implant but difficult to remove, thereby improving the stability of the interbody fusion device in the early stages of implantation.

[0039] like Figures 1 to 3As shown, to enhance the locking effect of the drive member 22, in addition to moving it to the locking groove 11 after rotation, a detachable locking member 23 can be installed inside the fusion unit body 1. This locking member 23 can abut against the drive member 22, ensuring that the cam portion 221 can press against the locking groove 11, preventing the cam portion 221 from rotating back after the drive member 22 rotates. The locking member 23 and the drive member 22 can be elastically connected. For example, the locking member 23 can be an expansion structure, such as an expansion ring or a medical rubber plug. After the cam portion 221 is engaged in the locking groove 11, the expansion ring or medical rubber plug can be inserted into the fusion unit body 1. After insertion, the expansion ring or medical rubber plug can abut against the drive member 22, limiting the movement of the drive member 22 and preventing the cam portion 221 from exiting the locking groove 11. The medical rubber plug can be made of silicone rubber, which has good biocompatibility and high and low temperature resistance. The locking member 23 and the fusion body 1 can also be connected by threads. The locking member 23 can be a locking nut. Correspondingly, a threaded groove 162 is provided at the tail 16. The threaded groove 162 can accommodate the locking member 23 and allow the driving member 22 to pass through. By rotating the locking member 23, its position in the threaded groove 162 can be adjusted. When the locking member 23 abuts against the driving member 22, the locking member 23 can lock the driving member 22.

[0040] The drive member 22 can have a working position and an initial position. When the drive member 22 is in the initial position, the insert 21 is completely located inside the fusion body 1. The drive member 22 can be rotated to switch it from the initial position to the working position. When the drive member 22 is in the working position, the cam portion 221 can push the insert 21 out of the fusion body 1. Figure 3 and Figure 4 As shown, a guide groove 12 can be provided inside the fusion unit body 1. The guide groove 12 is connected to the locking groove 11. When the drive member 22 is installed into the fusion unit body 1, the cam part 221 can be used as a reference to enter the guide groove 12 to determine the initial position of the drive member 22. When the drive member 22 switches from the initial position to the working position, the cam part 221 can rotate in the guide groove 12. To improve the rotation process, a guide surface 123 can be machined in the guide groove 12. The shape of the guide surface 123 matches the arc of the contour line of the rotation path of the cam part 221 when it rotates. During rotation, the cam part 221 can always abut against the guide surface 123.

[0041] A first stop surface 121 can be provided in the guide groove 12. When the drive member 22 is in the working position, the cam part 221 can abut against the first stop surface 121, and the cam part 221 is directly opposite the locking groove 11 at this time. In order to prevent the drive member 22 from continuing to rotate, the drive member 22 can be moved until its cam part 221 is engaged in the locking groove 11, thereby preventing the cam part 221 from rotating and causing the insert 21 to retract into the fusion body 1.

[0042] When the drive member 22 is in its initial position, a second stop surface 122 can be provided in the guide groove 12 for easy positioning. When the drive member 22 is not rotating, its cam portion 221 abuts against the second stop surface 122. At this time, the rotation of the cam portion 221 is restricted by the second stop surface 122, thereby keeping the position of the cam portion 221 basically fixed within the fusion body 1. At this time, the insert 21 is completely located within the fusion body 1. Based on the initial position, and limited by the first stop surface 121 and the second stop surface 122, the rotation angle of the drive member 22 within the fusion body 1 is between 0 degrees and 90 degrees. The first stop surface 121, the second stop surface 122, and the guide surface 123 can be connected to form the guide groove 12.

[0043] The drive unit 22 also includes a connecting rod, one end of which is connected to the cam part 221. To prevent the drive unit 22 from shaking inside the fusion body 1, a fixing groove can be opened inside the fusion body 1. The fixing groove is connected to the threaded groove 162. The connecting rod can rotate inside the fixing groove, and the fixing groove allows the cam part 221 to pass through.

[0044] To enable the rotation, movement and locking of the drive component 22, an operating tool can be used to assist in completing the above process. To facilitate the connection between the operating tool and the drive component 22 via the locking component 23, a clearance hole 231 can be opened at the center of the locking component 23, so that the operating tool can pass through the clearance hole 231 and drive the drive component 22 to move. The operating tool can also be installed in the fusion body 1 of the locking component 23. The operating tool is provided with an operating end and a connecting end. To facilitate the operation of the operating tool, in one embodiment, the locking member 23 has a locking groove 232, the driving member 22 has a rotating hole 222, and the operating tool is correspondingly provided with a first connecting protrusion and a second connecting protrusion. The first connecting protrusion is located on the side of the operating tool and can cooperate with the locking groove 232 to abut the locking member 23 against the driving member 22, locking the position of the driving member 22 in the fusion body 1 and preventing the insert 21 from retracting into the fusion body 1 due to the change in the position of the driving member 22. The second connecting protrusion is located in the middle of the connecting end of the operating tool and can enter the rotating hole 222 through the clearance hole 231 and cooperate with the rotating hole 222 to realize the rotation of the driving member 22. The rotating hole 222 can be a hexagonal groove. The rotating operating end can drive the first connecting protrusion and the second connecting protrusion to rotate and lock the drive member 22, preventing the cam part 221 from disengaging from the locking groove 11 and causing the drive member 22 to have a risk of rotation. This ensures that the insert 21 cannot retract from the fusion device body 1 after being inserted into the adjacent vertebral body, and the patient does not need to undergo a second surgery due to the retraction of the insert 21. In other embodiments, the first connecting protrusion can be provided on the locking member 23 and the locking groove 232 can be provided on the operating tool, or the second connecting protrusion can be provided on the drive member 22 and the rotating hole 222 can be provided on the operating tool. No further limitations are made here.

[0045] In another embodiment, the rotation, movement, and locking processes of the drive member 22 are achieved using a rotating tool and a locking tool from the prior art, respectively. When using the tool, the drive member 22 is rotated and moved by connecting the rotating hole 222 until its cam part 221 can be engaged in the locking groove 11. After the cam part 221 is engaged, the rotating tool is removed. Then, the locking tool is used to cooperate with the locking groove 232 and the locking member 23 is rotated until it abuts against the drive member 22, locking the position of the drive member 22 in the fusion body 1. After that, the locking tool is removed, and the implantation process of the intervertebral fusion device is completed.

[0046] To provide growth space for subsequent bone tissue regeneration, bone graft windows 18 can be opened on the upper and lower surfaces of the fusion device body 1, and these windows 18 can penetrate through the upper and lower surfaces of the fusion device body 1. Through holes 19 can also be opened on the anterior and posterior surfaces of the fusion device body 1, penetrating through the anterior and posterior surfaces of the fusion device body 1. After the operating tools are removed, the bone graft windows 18, through holes 19, and driving components 22 can form a continuous space. After subsequent bone ingrowth, the new bone tissue can fill the internal space of the fusion device body 1, thereby connecting the fusion device body 1 with the original spine and enhancing the stability of the intervertebral fusion device within the human body.

[0047] like Figures 5-8 As shown, to reduce the space occupied inside the fusion unit 1 and optimize the rotation process of the drive member 22, the cam portion 221 can be machined into an elliptical shape, and correspondingly, the locking groove 11 is also machined into an elliptical shape, with their shapes and dimensions matching. When the drive member 22 is in the initial position, the short axis direction of the cam portion 221 is consistent with the axial direction of the insert 21, and the insert 21 abuts against both sides of the short axis of the cam portion 221. As the drive member 22 rotates, the insert 21 is partially pushed out of the fusion unit 1, and its abutment position with the cam portion 221 continuously changes. When the drive member 22 rotates to the working position, the long axis direction of the cam portion 221 is consistent with the axial direction of the insert 21, the insert 21 abuts against both sides of the long axis of the cam portion 221, and the cam portion 221 is directly opposite the locking groove 11.

[0048] The insert 21 may be provided with a limiting portion 211, and correspondingly, a limiting member 14 is provided inside the fusion body 1 to prevent the insert 21 from completely protruding from the fusion body 1 when the drive member 22 rotates. To facilitate the installation of the limiting member 14, a mounting hole 13 can be provided on the fusion body 1. The mounting hole 13 allows the insert 21 and the limiting member 14 to be installed into the fusion body 1, and can also fix the limiting member 14 in its installation position within the fusion body 1. A hole is provided at the center of the limiting member 14, and the shape of the edge of the limiting member 14 matches the outer contour of the limiting portion 211. When the drive member 22 is in the working position, part of the structure of the insert 21 can slide through the hole and protrude from the fusion body 1, while the limiting portion 211 abuts against the limiting member 14 and cannot detach from the fusion body 1. The insert 21 can be processed into a stepped columnar structure, that is, the outer diameter of the columnar body on one side is smaller and the outer diameter of the columnar body on the other side, namely the limiting part 211, is larger. The limiting part 14 can also be processed into a columnar body accordingly. The limiting part 14 has a stepped hole corresponding to the shape of the insert 21. The stepped hole can only allow the part of the insert 21 with the smaller outer diameter to pass through, while the limiting part 211 cannot pass through. The limiting part 211 and the limiting part 14 can effectively prevent the insert 21 from completely detaching from the fusion body 1.

[0049] The present invention also provides a fusion device system, including an operating tool and the aforementioned intervertebral fusion device. The operating tool can rotate the drive member 22 and move the drive member 22 until its cam portion 221 is engaged in the locking groove 11. It can also lock the drive member 22 so that the embedded member 21 can be fixed in the vertebral body and cannot be retracted into the fusion device body 1. The fusion device system can improve the stability of the intervertebral fusion device in the early stage of implantation and the implantation and operation process is simple.

[0050] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. An interbody fusion device, characterized in that, include: Fusion device body (1), the fusion device body (1) is provided with a locking groove (11), the fusion device body (1) is used to support the vertebral body; The locking assembly (2) includes an insert (21) and a drive member (22) movably disposed within the fusion body (1). The drive member (22) is provided with a cam portion (221) that abuts against the insert (21). The drive member (22) is rotatable such that the cam portion (221) pushes the insert (21) out of the fusion body (1), so that the insert (21) can be inserted into the vertebral body. The drive member (22) is also capable of... Move the cam portion (221) until it engages with the locking groove (11) to restrict the insert (21) from retracting into the fusion body (1). The locking groove (11) matches the shape of the cam portion (221). When the drive member (22) rotates to push out the insert (21), the cam portion (221) is directly opposite the locking groove (11). Continue to move the drive member (22) until the cam portion (221) engages with the locking groove (11).

2. The interbody fusion device according to claim 1, characterized in that, The fusion body (1) is provided with a guide groove (12), which is connected to the locking groove (11), and the cam part (221) is movably disposed in the guide groove (12).

3. The interbody fusion device according to claim 2, characterized in that, The drive member (22) has an initial position and a working position. The guide groove (12) is provided with a first stop surface (121). When the drive member (22) is in the working position, the cam part (221) can push the insert (21) out of the fusion body (1). The cam part (221) abuts against the first stop surface (121) to limit the drive member (22) from continuing to rotate. The cam part (221) is directly opposite the locking groove (11).

4. The interbody fusion device according to claim 3, characterized in that, The guide groove (12) is also provided with a second stop surface (122). When the drive member (22) is in the initial position, the cam part (221) can abut against the second stop surface (122), and the insert (21) is located inside the fusion body (1).

5. The interbody fusion device according to claim 1, characterized in that, The locking assembly (2) further includes a locking member (23) detachably disposed in the fusion body (1), the locking member (23) being able to abut against the drive member (22) to press the cam portion (221) against the locking groove (11).

6. The interbody fusion device according to claim 5, characterized in that, The locking member (23) has a clearance hole (231), through which the operating tool can pass and drive the driving member (22) to move. The operating tool can also be installed in the fusion body (1).

7. The interbody fusion device according to claim 6, characterized in that, Of the operating tool and the locking member (23), one is provided with a first connecting protrusion and the other is provided with a locking groove (232) that cooperates with the first connecting protrusion; of the operating tool and the driving member (22), one is provided with a second connecting protrusion and the other is provided with a rotating hole (222) that cooperates with the second connecting protrusion.

8. The interbody fusion device according to claim 1, characterized in that, The fusion body (1) is provided with a mounting hole (13), and a limiting member (14) is provided in the mounting hole (13). The insert (21) is slidably engaged with the limiting member (14). The insert (21) is provided with a limiting part (211), and the limiting part (211) can abut against the limiting member (14) to restrict the insert (21) from detaching from the fusion body (1).

9. The interbody fusion device according to claim 1, characterized in that, The fusion body (1) is provided with a head (15) and a tail (16), and the insert (21) is provided on the head (15).

10. A fusion system, characterized in that, The device includes an operating tool and an intervertebral fusion device as described in any one of claims 1-9. The operating tool is used to operate the drive member (22) to push the insert (21) out of the fusion device body (1) and to operate the drive member (22) to move the cam portion (221) into the locking groove (11).

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