Adjustable lumbar fusion cage

Abstract

The utility model discloses an adjustable lumbar fusion cage, and relates to the technical field of medical instruments, in particular to an adjustable lumbar fusion cage used for treating diseases such as lumbar disc herniation. The front end face of a probing head is of an arc-shaped structure, and a clamping and fixing assembly and an angle adjusting assembly are arranged at the rear end of the probing head. The front end of the clamping and fixing assembly is connected with the rear end of the probing head; the front end of the angle adjusting assembly is hinged to the rear end of the probing head. The rear end of the angle adjusting assembly is limited and fixed after being unfolded by assembling a limiting assembly; a plurality of spinous processes are evenly distributed on the upper end face and the lower end face of the angle adjusting assembly. The middle of the angle adjusting assembly and the middle of the clamping and fixing assembly are provided with vertically-through embedded hollow holes. According to the technical scheme, the problems that in the prior art, grease in the human body can be fused into the threaded connection position of the fusion cage; meanwhile, frequent movement of the lumbar vertebra of the human body causes angle change of the fusion cage, operation needs to be conducted again, and life safety of the patient is affected.

Description

Technical Field

[0001] The utility model discloses an adjustable lumbar fusion device, which relates to the technical field of medical devices, and in particular to an adjustable lumbar fusion device for treating diseases such as lumbar disc herniation. Background Art

[0002] Lumbar fusion cages are a key component of lumbar intervertebral fusion surgery, commonly used to treat conditions such as lumbar disc herniation, spondylolisthesis, and spinal stenosis. Through anterior or posterior lumbar surgery, bone grafting or cage implantation and bone grafting are performed to create bony union between the lumbar intervertebral joints, thereby establishing and maintaining lumbar stability. Lumbar fusion surgery is a complex procedure requiring experienced surgeons. The procedure carries the risk of nerve and vascular damage.

[0003] During bone graft fusion surgery, the soft tissue between adjacent vertebrae is first completely removed. If there is a herniated disc, the disc and the underlying endplate cartilage are completely removed, completely exposing the vertebral bone. An intervertebral fusion cage is then placed over the cleaned, fractured bone surface. Autologous bone, allogeneic bone, or osteoinductive material is implanted into the cavity, and then fixed with steel plates and nails, gradually fusing the area into a single unit.

[0004] The search revealed an expandable intervertebral fusion device with application number 202321165894.0; the device uses a screwdriver to rotate the adjustment column, which is threadedly connected to the connecting cavity, allowing the adjustment column to move within the connecting cavity. The search also found an adjustable lumbar fusion device with application number 202221223790.6; the device uses a tool inserted into the slide slot to rotate the threaded block, which drives the push block inward.

[0005] In existing technical solutions, the angle of the lumbar fusion device is mostly adjusted by pushing with screws. However, after the lumbar fusion device is installed in the human body, the fat and oil in the human body will be absorbed into the threaded connection of the lumbar fusion device over time. At the same time, the frequent movement of the human lumbar spine will cause the thread to be stripped off at the threaded connection, which will cause the angle of the lumbar fusion device to change. In this case, the patient needs to undergo lumbar fusion surgery again, which affects the patient's life safety.

[0006] In view of the problems existing in the above-mentioned prior art, it is very necessary to research and design a new adjustable lumbar fusion device to overcome the problems existing in the prior art. Summary of the Invention

[0007] Based on the technical problems of the above-mentioned prior art, such as the human body's oils and fats being absorbed into the screw connections of the fusion device, and the frequent movement of the human lumbar spine causing the fusion device angle to change, requiring further surgery and endangering the patient's life safety, an adjustable lumbar fusion device is provided. The present invention mainly adopts a chimeric support assembly method to avoid the problem of thread backing out caused by the screw connection push method.

[0008] The technical means adopted by this utility model are as follows:

[0009] An adjustable lumbar fusion device comprises: an insertion head, an angle adjustment component, a spinous process, an embedded hollow hole, a clamping and fixing component and an assembly limit component;

[0010] Furthermore, the front end surface of the probe is an arc-shaped structure;

[0011] Furthermore, the rear end of the probe head is provided with a clamping and fixing component and an angle adjustment component;

[0012] Furthermore, the front end of the clamping and fixing assembly is connected to the rear end of the probe;

[0013] Furthermore, the front end of the angle adjustment component is hinged to the rear end of the probe head to achieve adjustment of the expansion angle of the adjustable lumbar fusion device; the rear end of the angle adjustment component is assembled with a limit component to achieve limited fixation after expansion;

[0014] Furthermore, a plurality of spinous processes are distributed on the upper and lower end surfaces of the angle adjustment component;

[0015] Furthermore, an embedded hollow hole is provided between the angle adjustment component and the clamping and fixing component, which is passed through from top to bottom and is used to fill the body with autologous, allogeneic, or osteoinductive materials.

[0016] Furthermore, the clamping and fixing assembly includes: a load-bearing center plate, an assembly slot, a clamping insert plate, a clamping matching plate, and an inserting slot hole;

[0017] Furthermore, the front end of the bearing center plate is fixedly mounted on the rear end of the probe head;

[0018] Furthermore, an assembly groove is provided on the inner end surface of the rear end of the bearing center plate;

[0019] Furthermore, a clamping matching plate is movably installed inside the assembly groove;

[0020] Furthermore, a plug-in slot is provided on the rear end surface of the bearing center plate;

[0021] Furthermore, a clamping plate is inserted into the interior of the plug-in slot;

[0022] Furthermore, the size of the clamping insert plate matches the size of the clamping matching plate;

[0023] Furthermore, one end of the clamping plate away from the bearing center plate is fixedly connected to the angle adjustment assembly.

[0024] Furthermore, the angle adjustment assembly includes: a support plate, a connecting shaft, an assembly seat, a fitting block, a support module and a matching slot;

[0025] Furthermore, there are two assembly seats, which are respectively assembled at the middle position of the upper and lower parts of the front end of the bearing center plate;

[0026] Furthermore, a connecting shaft is provided in the middle of the assembly seat;

[0027] Furthermore, the front ends of the two support plates are respectively mounted on the two connecting shafts;

[0028] Furthermore, a chiseling block is fixedly mounted on the inner side surface of the rear end of the support plate;

[0029] Furthermore, the support module is a replaceable component, and the overall structure is a rectangular block;

[0030] Furthermore, the upper and lower end surfaces of the support module are each provided with a matching groove that cooperates with the engaging block;

[0031] Furthermore, an assembly limiting component is provided between the matching groove and the engaging block;

[0032] Furthermore, the support module is placed between the two support plates and is assembled by means of the engaging block, the matching groove and the assembly limiting component.

[0033] Furthermore, a plurality of spinous processes are evenly distributed on the outer side of the support plate, and the spinous processes penetrate into the vertebral end plates to achieve a perfect fit between the fusion device and the vertebral end plates.

[0034] Furthermore, the center positions of the support plate and the load-bearing center plate are both provided with embedded holes, and the embedded holes are used to be filled with self-, allogeneic or osteoinductive materials.

[0035] Furthermore, the assembly limit assembly includes: a limit slot, a spring, a plug-in column, a rotating shaft, an adjustment slot and a limit socket;

[0036] Furthermore, the limiting groove is provided on the inner side of the support plate and is arranged opposite to the matching groove;

[0037] Furthermore, an adjustment slot with a certain height is provided on each of the two inner side walls of the limiting slot;

[0038] Furthermore, a horizontally arranged rotating shaft is assembled in the middle of the plug-in column, and the rotating shaft is mounted in the adjusting slot;

[0039] Furthermore, a spring is assembled in the limiting groove to limit its position through the plug-in column, and the plug-in column can make a telescopic movement to adjust the height of the groove fiber according to the compression / reset of the spring;

[0040] Furthermore, the limiting socket is arranged in the matching groove and is opposite to the limiting groove, and is used for inserting and limiting the plug-in column.

[0041] Furthermore, the upper and lower ends of the plug-in column are processed into semicircular arc structures.

[0042] The working principle of this utility model is:

[0043] When in use, the intervertebral space is expanded by using a tool, the support plate is expanded by the expander, and the support plate is rotated on the assembly seat by connecting the rotating shaft to adjust the expansion angle of the fusion device. The expansion angle is measured by the expander, and an appropriate support module is selected according to the angle. The support module is engaged with the interlocking block through the matching groove. At this time, the spring elasticity pushes the plug-in column to retract and retract in the limit groove, and the plug-in column can move up and down in the adjusting groove by the rotating shaft. At the same time, the plug-in column can also be rotated in the adjusting groove by the rotating shaft, so that the plug-in column can be matched and inserted in the limit plug-in hole when fine-tuning the angle, so that the interlocking point of the support module and the interlocking block can be positioned, and the clamping plug-in plate can be inserted into the plug-in slot hole while the support module is assembled. The top structure of the clamping plug-in plate is wedge-shaped, which can push the clamping matching plate to move inward in the assembly groove, so that the clamping matching plate can clamp and fix the filling material assembled inside the embedded hollow hole.

[0044] Compared with the prior art, the utility model has the following advantages:

[0045] 1. The adjustable lumbar fusion device provided by the present invention has a support module that can be interlocked with the interlocking block through a matching groove, so that the support module can provide stable support to the support plate. By stably supporting the expanded intervertebral space, the lumbar fusion device can effectively enhance the stability of the lumbar spine. Stability is crucial for preventing recurrence of lumbar vertebral slippage or degenerative changes; and expanding the intervertebral space and stabilizing its angle help to restore the normal physiological curvature and intervertebral space height of the lumbar spine, help to reduce the pressure on the lumbar intervertebral disc and surrounding soft tissue, thereby relieving pain and discomfort, and also promote the growth of bone tissue between the vertebrae. This bone tissue growth helps to achieve fusion between the vertebrae. This assembly method can avoid the problem of thread backing out caused by the screw connection pushing method, thereby avoiding the problem of change in the angle of the lumbar fusion device, which requires the patient to undergo lumbar fusion surgery again and affects the patient's life safety.

[0046] 2. The adjustable lumbar fusion device provided by the present invention clamps and fixes the filling material assembled inside the embedded hollow hole by clamping the matching plate, which can ensure that the filling material remains stable in the lumbar fusion device and will not affect the surgical effect or cause discomfort to the patient due to movement or displacement. The clamping can also ensure close contact between the filling material and the adjacent vertebrae, thereby accelerating the bone fusion process, improving the fusion rate, and helping to restore the stability and function of the lumbar spine.

[0047] In summary, the technical solution of the present invention solves the problems in the prior art that the oil in the human body will be absorbed into the threaded connection of the fusion device; at the same time, the frequent movement of the human lumbar spine causes the angle of the fusion device to change, requiring another surgery, which affects the patient's life safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0049] Figure 1 This is a schematic diagram of the structure of the utility model;

[0050] Figure 2 This is a schematic diagram of the support plate support structure of the utility model;

[0051] Figure 3 This is a schematic diagram of the structure of the clamping and fixing assembly of the utility model;

[0052] Figure 4 This is a schematic diagram of the structure of the assembly limit component of the utility model;

[0053] Figure 5 This is an accompanying diagram of the assembly limit component of the utility model.

[0054] In the figure: 1. Probe head; 2. Angle adjustment assembly; 201. Support plate; 202. Connecting shaft; 203. Assembly seat; 204. Engaging block; 205. Support module; 206. Matching groove; 3. Spinous process; 4. Embedded hole; 5. Clamping and fixing assembly; 501. Load-bearing center plate; 502. Assembly groove; 503. Clamping plug plate; 504. Clamping matching plate; 505. Plug-in slot; 6. Assembly limit assembly; 601. Limit slot; 602. Spring; 603. Plug-in column; 604. Rotating shaft; 605. Adjustment slot; 606. Limiting hole. DETAILED DESCRIPTION

[0055] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0056] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0057] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0058] Unless otherwise specified, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the technology, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0059] In the description of the present invention, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0060] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below their position devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0061] In addition, it should be noted that the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of this utility model.

[0062] like Figure 1-3 As shown, the utility model provides an adjustable lumbar fusion device, including an insertion head 1, the top surface of the insertion head 1 is an arc-shaped structure, a clamping and fixing component 5 is provided at the middle position of the rear end of the insertion head 1, and angle adjustment components 2 are provided on the upper and lower sides of the clamping and fixing component 5; the clamping and fixing component 5 includes a load-bearing center plate 501 fixedly installed at the middle position of the rear end of the insertion head 1;

[0063] The angle adjustment component 2 includes an assembly seat 203 fixedly mounted on the upper and lower end surfaces of the front end of the supporting center plate 501, a connecting shaft 202 is passed through the middle position of the assembly seat 203, and the two ends of the connecting shaft 202 are rotatably connected to the support plate 201, and a mosaic block 204 is fixedly mounted on the inner side surface of the rear end of the support plate 201, and a plurality of support modules 205 that are adapted to the support angles of the two support plates 201 are mosaic-mounted between the two mosaic blocks 204. The plurality of support modules 205 can be assembled in the support plates 201 that are spread at different angles, and matching grooves 206 that match the mosaic blocks 204 are provided on the upper and lower end surfaces of the support modules 205.

[0064] Use tools to expand the intervertebral space. The top surface of the probe head 1 is an arc-shaped structure, which reduces the friction of the probe and facilitates the placement of the fusion device in the intervertebral space. Use a clamping tool to place the fusion device in the gap, and use the expander to expand the support plate 201. The support plate 201 rotates on the assembly seat 203 through the connecting shaft 202 to adjust the expansion angle of the fusion device. The expansion angle can be measured by the expander, and an adapted support module 205 can be selected according to the angle. The support module 205 can be interlocked with the interlocking block 204 through the matching groove 206. In this way, the support module 205 can stably support the support plate 201. By stably supporting the expanded intervertebral space, the lumbar fusion device can be It can effectively enhance the stability of the lumbar spine. Stability is crucial for preventing the recurrence of lumbar spondylolisthesis or degenerative changes. It can also help to restore the normal physiological curvature and intervertebral height of the lumbar spine by expanding the intervertebral space and stabilizing its angle, which can help to reduce the pressure on the lumbar intervertebral disc and surrounding soft tissues, thereby relieving pain and discomfort and improving the overall function of the lumbar spine. It can also promote the growth of bone tissue between the vertebrae, which helps to achieve fusion between the vertebrae. This assembly method can avoid the problem of wire backing caused by the screw connection and push method, thereby avoiding changes in the angle of the lumbar fusion device, which requires the patient to undergo lumbar fusion surgery again, affecting the patient's life safety.

[0065] like Figure 2-5As shown, a plurality of spinous processes 3 are fixedly installed at equal distances on the outer end surface of the support plate 201. The spinous processes 3 at the outer end of the support plate 201 penetrate into the vertebral end plate to achieve perfect fit between the fusion device and the vertebral end plate. The center positions of the support plate 201 and the load-bearing center plate 501 are both provided with embedded holes 4, which can be used to fill the embedded holes 4 with self-, allogeneic or bone-inducing materials. The end surface of the mosaic block 204 close to the support module 205 is provided with an assembly limit component 6, which includes a limit component 6 provided on the end surface of the mosaic block 204 close to the support module 205. The limiting groove 601 is provided with a spring 602 and a plug-in column 603 inside the limiting groove 601. The upper and lower ends of the plug-in column 603 are both semicircular arc structures. The bottom end of the plug-in column 603 abuts against the spring 602. Adjustment grooves 605 are provided on both side walls of the limiting groove 601. A rotating shaft 604 is rotatably installed inside the adjusting groove 605. The rotating shaft 604 can move up and down in the adjusting groove 605. The rotating shaft 604 is inserted into the interior of the plug-in column 603. A limiting socket 606 that matches the plug-in column 603 is provided on the inner wall of the bottom groove of the matching groove 206.

[0066] The rear end structure of the supporting center plate 501 is a U-shaped structure. A plug-in slot 505 is provided on the rear end surface of the supporting center plate 501, and an assembly slot 502 is provided on the inner end surface of the rear end of the supporting center plate 501. A clamping matching plate 504 is movably installed inside the assembly slot 502, and a clamping plug-in plate 503 is inserted into the plug-in slot 505. The size of the clamping plug-in plate 503 matches the size of the clamping matching plate 504, and the end of the clamping plug-in plate 503 away from the supporting center plate 501 is fixed to the side end surface of the supporting module 205.

[0067] By adopting the above technical solution, when the supporting module 205 is engaged with the interlocking block 204 through the matching groove 206, the spring 602 elastically pushes the plug-in column 603 to expand and contract in the limiting groove 601, and the plug-in column 603 can move up and down in the adjusting groove 605 through the rotating shaft 604. At the same time, the plug-in column 603 can also rotate in the adjusting groove 605 through the rotating shaft 604, so that the plug-in column 603 can be matched and inserted in the limiting socket 606 when fine-tuning the angle. In this way, the interlocking part of the supporting module 205 and the interlocking block 204 can be positioned, avoiding the problem of the supporting module 205 moving left and right, and at the same time, When the block 205 is assembled, the clamping plate 503 can be inserted into the plug-in slot 505. The top structure of the clamping plate 503 is wedge-shaped, which can push the clamping matching plate 504 to move inward in the assembly slot 502. In this way, the clamping matching plate 504 can clamp and fix the filling material assembled in the embedded hole 4 on the inside, ensuring that the filler remains stable in the lumbar fusion cage and will not affect the surgical effect or cause patient discomfort due to movement or displacement. The clamping can also ensure that the filler is in close contact with the adjacent vertebrae, thereby accelerating the bone fusion process, improving the fusion rate, and helping to restore the stability and function of the lumbar spine.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An adjustable lumbar fusion cage, characterized by: The adjustable lumbar fusion device comprises: an insertion head (1), an angle adjustment component (2), a spinous process (3), an embedded hollow hole (4), a clamping and fixing component (5) and an assembly limit component (6); The probe (1) has a front end surface with an arc-shaped structure; The rear end of the probe (1) is provided with a clamping and fixing component (5) and an angle adjustment component (2); The front end of the clamping and fixing assembly (5) is connected to the rear end of the probe (1); The front end of the angle adjustment component (2) is hingedly connected to the rear end of the probe (1) to achieve adjustment of the expansion angle of the adjustable lumbar fusion device; the rear end of the angle adjustment component (2) is assembled with a limiting component (6) to achieve limited fixation after expansion; The angle adjustment component (2) has a plurality of spinous processes (3) distributed evenly on the upper and lower end surfaces; An embedding hole (4) extending vertically through the angle adjustment component (2) and the clamping and fixing component (5) is provided between the angle adjustment component (2) and the clamping and fixing component (5) for filling with autologous, allogeneic, or osteoinductive material.

2. The adjustable lumbar fusion cage according to claim 1, characterized in that: The clamping and fixing assembly (5) comprises: a bearing center plate (501), an assembly slot (502), a clamping insert plate (503), a clamping matching plate (504) and an inserting slot hole (505); The front end of the bearing center plate (501) is fixedly mounted on the rear end of the probe (1); An assembly groove (502) is provided on the inner end surface of the rear end of the bearing center plate (501); A clamping matching plate (504) is movably installed inside the assembly groove (502); A plug-in slot (505) is provided on the rear end surface of the load-bearing center plate (501); A clamping plate (503) is inserted into the insertion slot (505); The size of the clamping insert plate (503) matches the size of the clamping matching plate (504); One end of the clamping insert plate (503) away from the bearing center plate (501) is fixedly connected to the angle adjustment assembly (2).

3. The adjustable lumbar fusion cage according to claim 1, characterized in that: The angle adjustment assembly (2) comprises: a support plate (201), a connecting shaft (202), an assembly seat (203), a fitting block (204), a support module (205) and a matching groove (206); There are two assembly seats (203), which are respectively assembled at the middle position of the upper and lower front ends of the bearing center plate (501); A connecting shaft (202) is provided in the middle of the assembly seat (203); The front ends of the two support plates (201) are respectively mounted on two connecting shafts (202); A fitting block (204) is fixedly mounted on the inner side surface of the rear end of the support plate (201); The support module (205) is a replaceable component, and is a rectangular block-like structure as a whole; The upper and lower end surfaces of the support module (205) are each provided with a matching groove (206) that matches the engaging block (204); An assembly limiting component (6) is provided between the matching groove (206) and the engaging block (204); The support module (205) is placed between the two support plates (201) and is assembled in a limited manner through the interlocking block (204), the matching groove (206) and the assembly limiting component (6).

4. The adjustable lumbar fusion cage according to claim 3, characterized in that: The outer side of the support plate (201) is evenly distributed with a plurality of spinous processes (3), and the spinous processes (3) penetrate into the vertebral end plate, thereby achieving perfect fit between the fusion device and the vertebral end plate.

5. The adjustable lumbar fusion cage according to claim 3, characterized in that: The support plate (201) and the bearing center plate (501) are both provided with embedded holes (4) at their center positions, and the embedded holes (4) are used to be filled with self-, allogeneic or osteoinductive materials.

6. The adjustable lumbar fusion cage according to claim 1, characterized in that: The assembly limiting component (6) comprises: a limiting groove (601), a spring (602), a plug-in column (603), a rotating shaft (604), an adjustment groove (605) and a limiting socket (606); The limiting groove (601) is arranged on the inner side of the support plate (201) and is arranged opposite to the matching groove (206); An adjustment groove (605) with a certain height is respectively provided on both side walls of the inner portion of the limiting groove (601); The middle of the plug-in column (603) is equipped with a horizontally arranged rotating shaft (604), and the rotating shaft (604) is installed in the adjusting groove (605); The spring (602) is assembled in the limiting groove (601) and is limited by the plug-in column (603). The plug-in column (603) performs telescopic movement to adjust the fiber height of the groove (605) according to the compression / reset of the spring (602). The limiting jack (606) is arranged in the matching groove (206) and is arranged opposite to the limiting groove (601), and is used for inserting and limiting the plug-in column (603).

7. The adjustable lumbar fusion cage according to claim 6, characterized in that: The upper and lower ends of the plug-in column (603) are both processed into semicircular arc structures.

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