A minimally invasive combined intervertebral fusion device and intervertebral fixation device

Abstract

The present invention discloses a minimally invasive combined intervertebral fusion device and an intervertebral fixation device for the spine, belonging to the technical field of intervertebral fusion devices. The minimally invasive combined intervertebral fusion device for the spine comprises an intervertebral fusion device body, which is arranged in a fan shape, and a distance adjustment support structure is arranged on one side of the intervertebral fusion device body. The intervertebral fusion device body comprises a fusion device support base, and a fan-shaped receiving plane groove is provided on the upper surface of the fusion device support base, and a distance adjustment support plate with the same shape and size is placed inside the receiving plane groove. The fusion device support base is located at the bottom of the receiving plane groove and has two symmetrically arranged through-lifting grooves. The present invention combines and fixes the intervertebral fusion device and the intervertebral fixation device, so that after injecting bone mud, the entire intervertebral fusion device is fixed on the intervertebral fixation device, the intervertebral fusion device is more stable to use, not easy to deviate, and the height of the intervertebral fusion device can be accurately adjusted, and the adaptability is stronger.

Description

Technical Field

[0001] The present invention belongs to the technical field of intervertebral fusion devices, and in particular relates to a minimally invasive combined intervertebral fusion device and an intervertebral fixation device. Background Art

[0002] Intervertebral fusion devices are commonly used to treat a variety of spinal diseases, such as lumbar disc herniation (after removal of the protruding disc tissue), lumbar spinal stenosis, lumbar spondylolisthesis, cervical spondylosis, etc. When these diseases lead to severe disc degeneration, loss of intervertebral height, and decreased spinal stability, the implantation of intervertebral fusion devices helps to restore the stability and normal anatomical relationship of the spine.

[0003] During the operation, the diseased intervertebral space is generally reached through different surgical approaches such as the anterior, posterior or lateral approach, and the diseased intervertebral disc tissue and surrounding soft tissue that may affect fusion are thoroughly removed. Then an intervertebral fusion device of appropriate specifications is implanted into the intervertebral space, and an appropriate amount of autologous bone or bone transplant substitutes (such as allogeneic bone, artificial bone, etc.) are filled inside or around it to promote bone fusion.

[0004] The intervertebral fusion device needs to be fixed with an intervertebral fixation device when it is used. In the prior art, during the intervertebral fusion surgery, an opening needs to be made at the target position, and four holes are drilled around the opening, and the intervertebral fixation device is installed at the four holes. This surgery causes a large and large wound surface, and in the prior art, the intervertebral fixation device and the intervertebral fusion device are not fixed. Although the intervertebral fusion device needs to be filled with bone mud or other media after placement and wait for intervertebral fusion, fusion takes time. The movement of the vertebrae after the operation may cause the fusion device to slip or shift, affecting the surgical effect. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the disadvantages of the prior art and provide a stable device for fixing an intervertebral fusion cage and an intervertebral fixation device to each other.

[0006] The technical solution adopted to solve the above technical problems is: a minimally invasive combined intervertebral fusion device for the spine, comprising an intervertebral fusion device body, the intervertebral fusion device body is arranged in a fan shape, and a distance adjustment support structure is arranged on one side of the intervertebral fusion device body.

[0007] Through the above technical solution, the main body of the intervertebral fusion device is placed between the two vertebrae to be fused, playing the role of a support cushion, and the main body of the intervertebral fusion device is arranged in a fan shape, which is more in line with the cross-sectional shape of the vertebrae, and is convenient to be placed between the two vertebrae from the side incision position, which is convenient for the implementation of minimally invasive surgery, and the adjustable distance support structure can connect the intervertebral fusion device with the intervertebral fixation device, making the use of the intervertebral fusion device more stable.

[0008] The intervertebral fusion device body includes a fusion device support base, a fan-shaped accommodating plane groove is provided on the upper surface of the fusion device support base, a distance-adjusting support plate of the same shape and size is placed inside the accommodating plane groove, two symmetrically arranged through-lifting grooves are provided at the bottom of the accommodating plane groove, and a sliding pusher is provided in the fusion device support base between the two through-lifting grooves.

[0009] Through the above technical solution, the fusion device support base serves as the base of the entire intervertebral fusion device. The flat groove can accommodate the distance adjustment support plate, which can effectively reduce the volume of the entire intervertebral fusion device and facilitate its placement between two vertebrae, making the surgical incision smaller. The extension of the distance adjustment support plate can adjust the distance between the two vertebrae. The through-lifting groove can limit the vertical adjustment of the distance adjustment support plate to avoid lateral displacement of the distance adjustment support plate. When the sliding pusher is extended, the distance adjustment support plate can be lifted and adjusted.

[0010] Furthermore, the lower surface of the adjustable distance support plate is located above the two through-lifting grooves and is fixedly connected to two symmetrically arranged support lifting plates, and both sides of the two support lifting plates are fixedly connected to two symmetrically arranged positioning pins, and the inner side of the fusion device support base is provided with corresponding lifting limit grooves at both sides of the through-lifting grooves, and the corresponding positioning pins are slidably connected to the corresponding inner walls of the lifting limit grooves.

[0011] Through the above technical solution, the positioning pin and the lifting limit groove at the corresponding position cooperate to limit the distance adjustment support plate when it slides upward, thereby preventing the distance adjustment support plate from being separated from the fusion device support base.

[0012] Furthermore, the two supporting lifting plates are arranged at an inclined side where they are close to each other, and the fusion device supporting base is provided with two symmetrically arranged avoidance adjustment grooves at positions on both sides of the lifting groove.

[0013] Furthermore, two symmetrically arranged lateral displacement support blocks are slidably connected between two through-lifting grooves on the inner side of the fusion device support base, a mounting groove is provided on the side where the two lateral displacement support blocks are close to each other, and the side where the two lateral displacement support blocks are away from each other is inclined.

[0014] Through the above technical scheme, when the sliding pusher is expanded to both sides, the two symmetrical lateral support blocks will be pushed to both sides, and the inclined surface of the lateral support block will squeeze the inclined surface of the support lifting plate, which will lift the support lifting plate. The moving distance of the lateral support block can be infinitely and accurately adjusted by the sliding pusher, which effectively improves the accuracy of lifting the adjustable support plate and has stronger adaptability. In order to avoid motion interference when the lateral support block moves to both sides, it can be adjusted by setting an avoidance adjustment groove, and the mounting groove can be used to install the sliding pusher, and the expansion stroke of the sliding pusher can be increased.

[0015] Furthermore, a fixing threaded hole is provided on the inner side of the fusion device support base close to the arc surface, and a through positioning hole is provided through the middle part of the side of the fusion device support base away from the fixing threaded hole.

[0016] Furthermore, the sliding pusher includes a threaded adjustment block arranged between two lateral displacement support blocks, and the threaded adjustment block is rotatably connected to two symmetrically arranged adjustment support rods at both sides, and the outer walls of the two adjustment support rods are provided with through-limiting grooves, and the two adjustment support rods are slidably connected to positioning columns at the through-limiting grooves.

[0017] Through the above technical solution, when the threaded adjustment block is pushed by the coarse threaded rod, the threaded adjustment block slides, and the two lateral support blocks are pushed to move to both sides under the action of the adjusting support rod and the through-limiting groove, thereby lifting the distance adjustment support plate, and the positioning column has a limiting function.

[0018] Furthermore, the two ends of the positioning column are fixedly connected to the inner top wall and the inner bottom wall of the fusion device support base, and the two adjustment support rods are rotatably connected to the mounting grooves at the corresponding positions at one end away from the threaded adjustment block, and an adjustment threaded hole is opened between the middle parts of the two sides of the threaded adjustment block.

[0019] Through the above technical solution, the adjusting threaded hole can cooperate with the coarse threaded rod, and when the coarse threaded rod is rotated and advanced, the threaded adjusting block can be driven to move.

[0020] Furthermore, the adjustable distance support structure includes a support block body, the support block body is made of silicone material, a collapse groove is provided on the inner side of the support block body, and through holes are provided at the center positions on both sides of the support block body.

[0021] Through the above technical solution, the support block body with the collapse groove in the silicone material is relatively soft and is compressed when squeezed by the support adjustment block and the fusion device support base. When the intervertebral fusion device body and the intervertebral fixation body are fixed, the distance can be adjusted, and the adaptability is stronger.

[0022] A vertebral body fixing device matched with a minimally invasive combined intervertebral fusion device of the spine comprises an intervertebral body fixing body arranged on a distance adjustment support structure away from the intervertebral fusion device body.

[0023] The intervertebral fixation body includes a support adjustment block, and connecting holes are opened through the middle positions of both sides of the support adjustment block. Support software is fixedly connected through the positions on both sides of the support adjustment block. The two support softwares are threadedly connected with intervertebral fixation cone screws. A coarse threaded rod is arranged through the connecting hole, and a fine threaded rod is fixedly connected to the end of the coarse threaded rod away from the support adjustment block.

[0024] Through the above technical solution, the supporting software facilitates the penetration of the intervertebral fixation cone screw thread, and the supporting software is trumpet-shaped, so that the angle of oblique insertion of the intervertebral fixation cone screw is wider and convenient for adjustment.

[0025] The coarse threaded rod is threadedly connected to the adjusting threaded hole, and the fine threaded rod is threadedly connected to the fixing threaded hole.

[0026] Through the above technical solution, the fine threaded rod will not affect the threaded adjustment block when it penetrates the positioning hole and the adjustment threaded hole.

[0027] The beneficial effects of the present invention are as follows: (1) The intervertebral fusion device of the present invention is fan-shaped and has a flat overall shape. The wound during the intervertebral fusion device placement surgery is small, which makes it convenient to place the intervertebral fusion device between the target vertebrae and effectively relieves the patient's pain. By setting a coarse thread and a fine thread rod, the coarse thread rod can effectively adjust the sliding pusher, and the sliding pusher can be used to lift the adjustable support plate to adapt to the intervertebral distance, making the present invention more adaptable; (2) The present invention fixes the intervertebral fusion device and the intervertebral fixation device, and adjusts the distance by collapsing the adjustable support structure. The intervertebral fusion device and the intervertebral fixation device prevent the intervertebral fusion device from shifting between the unfused vertebrae after surgery, making the intervertebral fusion device more stable to use; (3) The intervertebral fixation cone screw of the present invention is located between the two vertebrae and fixed obliquely upward. After intervertebral fusion, the intervertebral fixation cone screw is sealed in the vertebral body and does not need to be set on both sides of the transverse process exposed on the outside of the vertebral body, thereby avoiding the intervertebral fixation cone screw affecting normal life in the later life process. In addition, only two intervertebral fixation cone screws are provided, which reduces the formation of surgical wounds while ensuring stability, thereby reducing the degree of pain for patients. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a first-view structural diagram of a minimally invasive combined intervertebral fusion cage and intervertebral fixation device of the present invention;

[0029] Figure 2This is a second-view structural diagram of a minimally invasive combined intervertebral fusion cage and intervertebral fixation device of the present invention;

[0030] Figure 3 It is a structural diagram of a distance-adjustable support plate of a minimally invasive combined intervertebral fusion device and an intervertebral fixation device of the present invention;

[0031] Figure 4 It is an exploded view of a minimally invasive combined intervertebral fusion device of the spine according to the present invention;

[0032] Figure 5 It is an exploded view of a feeding support structure of an intervertebral fixation device of the present invention;

[0033] Figure 6 It is a cross-sectional view of a minimally invasive combined intervertebral fusion device of the present invention;

[0034] Figure 7 It is a cross-sectional view of a distance-adjustable support structure between a minimally invasive combined intervertebral fusion device and an intervertebral fixation device of the present invention;

[0035] Figure 8 It is a structural schematic diagram of a sliding pusher of a minimally invasive combined intervertebral fusion device of the spine according to the present invention;

[0036] Fig. 9 The present invention is a cross-sectional view of a vertebral screw connecting block of an intervertebral fixation device.

[0037] Figure numerals: 1. intervertebral fusion device body; 10. distance adjustment support plate; 11. positioning pin; 12. support lifting plate; 13. fusion device support base; 14. accommodating plane groove; 15. through lifting groove; 16. lifting limit groove; 17. installation groove; 18. fixed threaded hole; 19. lateral displacement support block; 100. threaded adjustment block; 101. avoidance adjustment groove; 102. through positioning hole; 103. through limit groove; 104. adjustment support rod; 105. positioning column; 106. adjustment threaded hole; 2. distance adjustment support structure; 20. support block body; 21. through hole; 22. collapse groove; 3. intervertebral fixation body; 30. support adjustment block; 31. support software; 32. connection hole; 33. coarse threaded rod; 34. fine threaded rod; 4. intervertebral fixation cone screw. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0039] like Figure 1-9As shown, a minimally invasive combined intervertebral fusion device of the spine in this embodiment includes an intervertebral fusion device body 1, which is arranged in a fan shape. A distance-adjustable support structure 2 is arranged on one side of the intervertebral fusion device body 1. The intervertebral fusion device body 1 is placed between two vertebrae to be fused, and plays a role of a support cushion. The intervertebral fusion device body 1 is arranged in a fan shape, which is more in line with the cross-sectional shape of the vertebrae, and is convenient to be placed between the two vertebrae from the side incision position, which is convenient for the implementation of minimally invasive surgery. The distance-adjustable support structure 2 can connect the intervertebral fusion device with the intervertebral fixation device, so that the intervertebral fusion device is more stable to use.

[0040] A vertebral body fixing device matching a minimally invasive combined intervertebral fusion device of the spine comprises an intervertebral body fixing body 3 arranged on a distance adjustment support structure 2 away from an intervertebral body fusion device body 1.

[0041] The intervertebral fixation body 3 includes a support adjustment block 30, and connecting holes 32 are opened through the middle positions on both sides of the support adjustment block 30. Support software 31 is fixedly connected through the two sides of the connecting holes 32 of the support adjustment block 30. The two support softwares 31 are threadedly connected with intervertebral fixation cone screws 4. A coarse threaded rod 33 is penetrated in the connecting hole 32, and a fine threaded rod 34 is fixedly connected to the end of the coarse threaded rod 33 away from the support adjustment block 30. The support software 31 facilitates the thread penetration of the intervertebral fixation cone screw 4, and the support software 31 is trumpet-shaped, so that the angle of oblique insertion of the intervertebral fixation cone screw 4 is wider and convenient for adjustment.

[0042] The coarse threaded rod 33 is threadedly connected to the adjusting threaded hole 106 , and the fine threaded rod 34 is threadedly connected to the fixing threaded hole 18 . The fine threaded rod 34 will not affect the threaded adjusting block 100 when it penetrates through the positioning hole 102 and the adjusting threaded hole 106 .

[0043] The distance-adjustable support structure 2 includes a support block body 20, which is made of silicone material. A collapse groove 22 is provided on the inner side of the support block body 20, and through holes 21 are provided at the center positions on both sides of the support block body 20. The support block body 20 with the collapse groove 22 in the silicone material is relatively soft and is compressed when being squeezed by the support adjustment block 30 and the fusion device support base 13. When the intervertebral fusion device body 1 and the intervertebral fixation body 3 are fixed, the distance can be adjusted, and the adaptability is stronger.

[0044] The intervertebral fusion device body 1 includes a fusion device support base 13, and a fan-shaped accommodating plane groove 14 is provided on the upper surface of the fusion device support base 13. A distance-adjusting support plate 10 of the same shape and size is placed inside the accommodating plane groove 14. The fusion device support base 13 is provided with two symmetrically arranged through-lifting grooves 15 at the bottom of the accommodating plane groove 14. A sliding pusher is provided between the two through-lifting grooves 15 in the fusion device support base 13. The fusion device support base 13 serves as the base of the entire intervertebral fusion device. The accommodating plane groove 14 can accommodate the distance-adjusting support plate 10, which can effectively reduce the volume of the entire intervertebral fusion device and facilitate its placement between the two vertebral bodies, making the surgical incision smaller. The extension of the distance-adjusting support plate 10 can adjust the distance between the two vertebral bodies. The through-lifting groove 15 can limit the adjustment of the distance-adjusting support plate 10 in the vertical direction to avoid lateral displacement of the distance-adjusting support plate 10. When the sliding pusher is expanded, the distance-adjusting support plate 10 can be lifted and adjusted.

[0045] The sliding pusher includes a threaded adjustment block 100 arranged between the two lateral displacement support blocks 19, and two symmetrically arranged adjustment support rods 104 are rotatably connected to the two sides of the threaded adjustment block 100. A through-limiting groove 103 is opened on the outer wall of the two adjustment support rods 104. The two adjustment support rods 104 are located at the through-limiting groove 103 and are slidably connected with a positioning column 105. When the threaded adjustment block 100 is pushed by the coarse threaded rod 33, the threaded adjustment block 100 slides, and the two lateral displacement support blocks 19 are pushed to move to both sides under the action of the adjustment support rod 104 and the through-limiting groove 103, thereby realizing the lifting of the distance adjustment support plate 10, and the positioning column 105 has a limiting function.

[0046] The two ends of the positioning column 105 are fixedly connected to the inner top wall and the inner bottom wall of the fusion device support base 13. The two adjustment support rods 104 are rotatably connected to the mounting groove 17 at the corresponding position at one end away from the threaded adjustment block 100. An adjustment threaded hole 106 is opened between the middle parts of the two sides of the threaded adjustment block 100. The adjustment threaded hole 106 can cooperate with the coarse threaded rod 33, and can drive the threaded adjustment block 100 to move when the coarse threaded rod 33 is rotated and pushed forward.

[0047] The lower surface of the distance-adjustable support plate 10 is located above the two through-lifting grooves 15 and is fixedly connected to two symmetrically arranged support lifting plates 12. Two symmetrically arranged positioning pins 11 are fixedly connected to both sides of the two support lifting plates 12. Corresponding lifting limit grooves 16 are provided on the inner side of the fusion device support base 13 at both sides of the through-lifting grooves 15, and the corresponding positioning pins 11 are slidably connected to the corresponding inner walls of the lifting limit grooves 16. The positioning pins 11 cooperate with the lifting limit grooves 16 at the corresponding positions to limit the distance-adjustable support plate 10 when it slides upwards, so as to prevent the distance-adjustable support plate 10 from being separated from the fusion device support base 13.

[0048] The two supporting lifting plates 12 are arranged at an inclined position on the sides close to each other, and the fusion device supporting base 13 is provided with two symmetrically arranged avoidance adjustment grooves 101 at the positions on both sides of the lifting groove 15 that penetrates.

[0049] The inner side of the fusion device support base 13 is located between the two through-lifting grooves 15 and is slidably connected with two symmetrically arranged side shift support blocks 19. The side where the two side shift support blocks 19 are close to each other is provided with a mounting groove 17, and the side where the two side shift support blocks 19 are away from each other is inclined. When the sliding pusher is deployed to both sides, the two symmetrical side shift support blocks 19 will be pushed to both sides, and the inclined surface of the side shift support block 19 will squeeze the inclined surface of the support lift plate 12, which will lift the support lift plate 12. The moving distance of the side shift support block 19 can be steplessly and accurately adjusted by the sliding pusher, which effectively improves the accuracy of lifting the distance-adjustable support plate 10 and has stronger adaptability. When the side shift support block 19 moves to both sides, in order to avoid motion interference, it can be adjusted by setting an avoidance adjustment groove 101, and the mounting groove 17 can be installed in the sliding pusher, and the deployment stroke of the sliding pusher can be increased.

[0050] A fixing threaded hole 18 is provided on the inner side of the fusion device support base 13 close to the arc surface, and a through positioning hole 102 is provided through the middle of the side of the fusion device support base 13 away from the fixing threaded hole 18 .

[0051] The working principle of this embodiment is as follows: during the surgical operation, the present invention adopts a lateral minimally invasive method to open the surgical incision, removes the soft tissue between the two vertebrae to be fused at the lateral incision position, places the support block body 20 between the support adjustment block 30 and the fusion device support base 13, inserts the coarse threaded rod 33 and the fine threaded rod 34 into the connecting hole 32, the through hole 21 and the through positioning hole 102, and the fine threaded rod 34 passes through the adjustment threaded hole 106, and the fine threaded rod 34 is screwed into the fixed threaded hole 18, and the coarse threaded rod 33 is located at the position of the adjustment threaded hole 106;

[0052] Then, the intervertebral fusion device body 1, the distance adjustment support structure 2 and the intervertebral fixation body 3 are placed together between the two vertebrae to be fused, and one side of the plane of the fusion device support base 13 is located on the side close to the transverse process between the vertebrae. After the intervertebral fusion device body 1 is straightened, the coarse threaded rod 33 is rotated by a right-angle screwdriver so that the coarse threaded rod 33 is screwed into the adjustment threaded hole 106, so that the coarse threaded rod 33 drives the threaded adjustment block 100 to move, and the threaded adjustment block 100 pushes the adjustment support rod 104 to both sides. Then, under the action of the adjustment support rod 104, the lateral displacement support block 19 slides to both sides, and the inclined surface of the lateral displacement support block 19 cooperates with the inclined surface of the support lifting plate 12. Under the action of the lifting limit groove 16 and the positioning pin 11, the distance adjustment support plate 10 is vertically lifted, which can effectively adjust the distance between the two vertebrae.

[0053] A micro hole is opened at the front position at the support soft body 31, and the intervertebral fixation cone screw 4 is screwed into the support soft body 31 from the support soft body 31 at a predetermined inclination angle, and the intervertebral fixation cone screw 4 is obliquely drilled into the vertebral body at the corresponding position, and bone mud is poured between the two vertebral bodies at the side wound position;

[0054] An oblique incision is used when inserting the intervertebral fusion device body 1, while the traditional implantation surgery uses a frontal incision for operation. During the operation, the spinal nerve needs to be peeled to one side before the operation can be performed. After the operation, the nerve is reset, which is easy to cause nerve damage. The intervertebral fixation cone screw 4 is located between the two vertebrae and fixed obliquely upward. After intervertebral fusion, the intervertebral fixation cone screw 4 is sealed in the vertebral body and does not need to be set on both sides of the transverse process exposed on the outside of the vertebral body, avoiding the intervertebral fixation cone screw 4 affecting normal life in the later life process. Only two intervertebral fixation cone screws 4 are provided, which reduces the formation of surgical wounds while ensuring stability and reduces the patient's pain.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention.

Claims

1. A minimally invasive combined intervertebral fusion cage for the spine, characterized in that: It comprises an intervertebral fusion device body (1), the intervertebral fusion device body (1) is arranged in a fan shape, and a distance adjustment support structure (2) is arranged on one side of the intervertebral fusion device body (1); The intervertebral fusion device body (1) comprises a fusion device support base (13), the upper surface of the fusion device support base (13) is provided with a fan-shaped receiving plane groove (14), the inner side of the receiving plane groove (14) is provided with a distance adjustment support plate (10) of the same shape and size, the fusion device support base (13) is provided with two symmetrically arranged through-lifting grooves (15) at the bottom of the receiving plane groove (14), and a sliding pusher is provided between the two through-lifting grooves (15) in the fusion device support base (13); The adjustable distance support structure (2) comprises a support block body (20), the support block body (20) is made of a silicone material, a collapse groove (22) is provided on the inner side of the support block body (20), and through holes (21) are provided at the center positions of both sides of the support block body (20); Two symmetrically arranged lateral displacement support blocks (19) are slidably connected between two through-lifting grooves (15) on the inner side of the fusion device support base (13); a mounting groove (17) is provided on the side where the two lateral displacement support blocks (19) are close to each other, and a side where the two lateral displacement support blocks (19) are away from each other is inclined; A fixing threaded hole (18) is provided on the inner side of the fusion device support base (13) close to the arc surface, and a through positioning hole (102) is provided through the middle of the side of the fusion device support base (13) away from the fixing threaded hole (18); The sliding pusher comprises a threaded adjustment block (100) arranged between two lateral displacement support blocks (19), two symmetrically arranged adjustment support rods (104) are rotatably connected at two sides of the threaded adjustment block (100), through-penetrating limit slots (103) are provided at outer walls of the two adjustment support rods (104), and the two adjustment support rods (104) are slidably connected to positioning columns (105) at the through-penetrating limit slots (103); The two ends of the positioning column (105) are fixedly connected to the inner top wall and the inner bottom wall of the fusion device support base (13); the ends of the two adjustment support rods (104) away from the threaded adjustment block (100) are rotatably connected to the mounting grooves (17) at corresponding positions; and an adjustment threaded hole (106) is provided between the middle parts of the two sides of the threaded adjustment block (100); One end of the coarse threaded rod (33) is fixedly connected to a fine threaded rod (34); The coarse threaded rod (33) and the fine threaded rod (34) are inserted into the through hole (21) and the through positioning hole (102), and the fine threaded rod (34) passes through the adjusting threaded hole (106), and the fine threaded rod (34) is screwed into the fixing threaded hole (18), and the coarse threaded rod (33) is located at the adjusting threaded hole (106).

2. The minimally invasive combined intervertebral fusion cage of claim 1, characterized in that: The lower surface of the adjustable distance support plate (10) is fixedly connected to two symmetrically arranged support lifting plates (12) at a position above the two through-lifting grooves (15), and two symmetrically arranged positioning pins (11) are fixedly connected to the two sides of the two support lifting plates (12). The inner side of the fusion device support base (13) is provided with corresponding lifting limit grooves (16) at positions on both sides of the through-lifting grooves (15), and the corresponding positioning pins (11) are slidably connected to the inner walls of the corresponding lifting limit grooves (16).

3. The minimally invasive combined intervertebral fusion cage of claim 2, characterized in that: The two supporting lifting plates (12) are arranged at an inclined position on the sides close to each other, and the fusion device supporting base (13) is provided with two symmetrically arranged avoidance adjustment grooves (101) at positions on both sides of the penetrating lifting groove (15).

4. The intervertebral fixation device for the minimally invasive combined intervertebral fusion device of the spine according to any one of claims 1 to 3, characterized in that: It comprises an intervertebral fixation body (3) arranged on a distance-adjustable support structure (2) away from the intervertebral fusion device body (1); The intervertebral fixation body (3) comprises a support adjustment block (30), a connection hole (32) is formed through the middle of both sides of the support adjustment block (30), support soft bodies (31) are fixedly connected through the two sides of the connection hole (32) of the support adjustment block (30), two intervertebral fixation cone screws (4) are threadedly connected through the two support soft bodies (31), a coarse threaded rod (33) is formed through the connection hole (32), and a fine threaded rod (34) is fixedly connected to the end of the coarse threaded rod (33) away from the support adjustment block (30); The coarse threaded rod (33) is threadedly connected to the adjusting threaded hole (106), and the fine threaded rod (34) is threadedly connected to the fixing threaded hole (18).

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