Pressurized intervertebral fusion device with additional bone grafting

Abstract

Pressurized intervertebral fusion device with additional bone grafting, comprising a main body (1), an adjusting nut (4) and a fixing block (5), wherein a main body through-hole (14) is provided in the main body (1) which connects the upper and lower surfaces of the main body (1), wherein a blade assembly (2) is movably embedded in the main body through-hole (14), wherein the blade assembly (2) is provided with a blade through-hole which extends through the upper and lower surfaces of the blade assembly (2), wherein an insertion body (3) is embedded in the blade assembly (2), wherein a side surface of the blade assembly (2) comprises a blade slot into which a slider (31) of the insertion body (3) is embedded, wherein the main body (1) is provided with a pre-injection through-hole (111) and an insertion hole (112), and a post-injection through-hole (131) is provided on the opposite side of the pre-injection through-hole (111), wherein the end face of the adjusting nut (4) is provided with a nut through-hole (42), wherein the insertion body (3) is inserted into the insertion hole (112) at one end and mounted in the adjusting nut (4) at the other end, wherein the mounting block (5) is provided with a fastener through-hole (51) which is internally threaded, wherein the adjusting nut (4) is mounted in the fastener through-hole (51), wherein the adjusting nut (4) drives the movement of the insertion body (3) to open or close the blade assembly (2).

Description

TECHNICAL FIELD

[0001] The present invention belongs to the technical field of medical devices and relates in particular to a pressurized intervertebral fusion device (interbody fusion cage) with additional bone grafting. STATE OF THE ART

[0002] As treatment methods and concepts in spine surgery are constantly being updated, minimally invasive spine techniques are developing rapidly. New techniques for implanting various types of intervertebral fusion devices through small incisions and approaches are emerging. Intervertebral fusion through osteogenesis alone, using bone graft particles within the fusion device, is often unreliable. To increase the efficiency of intervertebral fusion in patients, most surgeons use a bone graft funnel to press the decompressed bone particles into the intervertebral space after intraoperatively treating the relevant intervertebral cartilage endplates. The bone graft particles are also compacted within the fusion device and then inserted into the intervertebral space.The final key procedure is then performed by turning the nut of the fusion device and other buttress-type devices. This increases the intervertebral height and restores the lumbar curve, which is a desirable outcome of the surgery. However, the physicians discovered in practice that the result was not what they had hoped for. Symptoms such as postoperative pseudo-articulation, recurrence of lower back pain and discomfort, etc., after conservative treatment has failed, require revision surgery with a new incision.

[0003] The CN206007347U height-adjustable minimally invasive intervertebral fusion device currently in clinical use has the above-mentioned problem. The analysis of the problem is: after the bone graft is compressed in the intervertebral space and in the intervertebral fusion device, the buttress-type fusion device will restore the height of the intervertebral space after buttressing, which will inevitably lead to a fluffy state of the bone graft particles originally compressed in the intervertebral space and in the fusion device. The implanted particles have less and less contact with the upper endplate. The higher the buttressing, the fluffier the bone graft particles in the intervertebral space and in the fusion device become, forming a defective cavity. According to the principle of bone formation, the fluffy bone particles outside the tension will gradually be absorbed.CN113967109A discloses a height-adjustable fusion device for posterior bone implants. This device only addresses posterior bone grafting in the state of bone deficiency after buttressing the fusion device, and not the lack of bone volume in the vertebral space due to buttressing. Relying solely on a buttressed fusion device to buttress the intervertebral space can lead to pseudo-articular formation and even fracture of the internal fixation. The technical problem to be solved is how to replace the missing bone particles in the intervertebral space and in the fusion device when the fusion device is buttressed. This is the basis for effective intervertebral fusion. Furthermore, US 2022 / 0183854 A1 discloses an expandable intervertebral fusion device with upper and lower endplates whose distance can be adjusted. DISCLOSURE OF APPLICATION

[0004] To overcome the above-mentioned problem of the prior art, it is an object of the present invention to provide a pressurized intervertebral fusion device with additional bone grafting, thereby enabling the intervertebral fusion device to perform a support function while filling the missing bone particles in the intervertebral space and in the fusion device.

[0005] To achieve this, a pressurized intervertebral fusion device with additional bone grafting according to claim 1 is proposed.

[0006] The pressurized intervertebral fusion device with additional bone grafting includes: a main body, an adjusting nut and a fixing block.

[0007] The main body is provided with a main body through-hole connecting the top and bottom surfaces of the main body. A vane assembly is movably embedded in the main body through-hole. The vane assembly is provided with a vane through-hole extending through the top and bottom surfaces of the vane assembly, and an insertion body is embedded in the vane assembly. The main body is provided with a pre-injection through-hole and an insertion hole, and a post-injection through-hole is provided on the opposite side of the pre-injection through-hole.

[0008] A nut through hole is opened on the end face of the adjusting nut. The insertion body is inserted into the insertion hole at one end and mounted in the adjusting nut at the other end. The mounting block is provided with a fastener through hole. The fastener through hole is threaded internally, and the adjusting nut is mounted in the fastener through hole.

[0009] The adjusting nut drives the movement of the insertion body to open or close the vane assembly.

[0010] Optionally, the blade assembly includes an upper blade and a lower blade. The upper blade includes an upper blade skirt and an upper blade plate member. An upper blade fitting hole is provided on the end surface of the upper blade skirt, and the upper blade fitting hole fits the upper part of the insertion body. The upper surface of the upper blade skirt is connected to the upper blade plate member. A plurality of blade teeth are provided on the upper surface of the upper blade plate member. The lower blade has the same structure as the upper blade. The upper blade and the lower blade are arranged up and down opposite each other.

[0011] Optionally, the main body includes a front end face, a rear end face, and side walls. The front end face is parallel to the rear end face, and the side wall is perpendicular to the front end face. The side wall is connected to the front end face at one end and to the rear end face at the other end.

[0012] Optionally, the pre-injection through-hole and the insertion hole are arranged in the same plane. The pre-injection through-hole is located in the center of the front end surface, and the insertion hole is provided on the periphery of the pre-injection through-hole.

[0013] An optional insertion slot is provided on the inside of the side panel. The position of the insertion slot is opposite the position of the insertion hole.

[0014] A vane slot is provided on the side surface of the vane assembly. The insertion body comprises a slider, an insertion rod, and a snap-in part. The slider is embedded in the vane slot. The slider and the snap-in part are both attached to the insertion rod. The adjusting nut is provided with an annular slot on the side. The snap-in part snaps into the annular slot. The insertion rod pushes the slider to slide in the vane slot.

[0015] Optionally, the number of insertion bodies is two. The snap-in part is C-shaped. Two insertion rods are connected to the outside of the snap-in part. The slider is attached to the inside of the end of the insertion rods.

[0016] Optionally, slide rails are provided in the fastener through hole on the left and right sides, with the position of the slide rail being opposite to the position of the insertion rod.

[0017] Optionally, turning slots are provided on the outside of the nut through hole, with the number of turning slots being four.

[0018] Optionally, the threads in the fastener through-hole are provided on the top surface of the fastener through-hole and the bottom surface of the fastener through-hole, wherein the fastener through-hole is unthreaded on both side surfaces.

[0019] Compared with the prior art, the present invention has the following advantageous effects:

[0020] In the present application, a pre-injection through-hole is provided on the main body, and a post-injection through-hole is provided on its opposite side. This allows the bone graft particles to be pushed into the vertebral space to compensate for the relative reduction in bone volume due to the enlarged space after buttressing. At the same time, in the present application, the main body is provided with a main body through-hole connecting the top and bottom of the main body. This allows the bone particles resulting from decompression to be gradually introduced and compacted through the inner central hole of the gripper. This can reduce the loss of bone particles in the implant window and the lack of bone particles after buttressing caused by tapping when other types of fusion devices are inserted into the vertebral space.The present application provides a blade assembly that can be pushed through the adjustment nut and slides out of the main body. This exerts pressure on the disc space. This allows the bone particles implanted into the disc space and the fusion device to establish strong contact with the upper and lower endplates and exert more uniform forces, thereby improving bony fusion of the disc space.

[0021] In addition, an upper blade fitting hole is provided on the end surface of the upper blade skirt of the present application to enable fitting of the blade assembly to the insertion body when the blade assembly is mounted in the main body.

[0022] Further, an insertion slot is provided in the side wall of the main body of the present application, which is arranged opposite to the position of the insertion hole to facilitate the sliding of the insertion body in the main body.

[0023] Furthermore, slide rails are provided in the fastener through-hole of the present application, which can facilitate the sliding of the insertion body.

[0024] Furthermore, rotation slots are provided on the outside of the nut through hole of the present application, which enable the adjustment nut to be easily adjusted by turning it with a tool.

[0025] Furthermore, the fastener through-hole of the present application is unthreaded on both side surfaces. The fastener through-hole is threaded only on the top and bottom surfaces to facilitate the movement of the insertion body. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the present invention in any way. Furthermore, the shapes and scale dimensions of the components in the drawings, etc., are merely schematic and are intended to aid understanding of the invention and are not intended to specifically limit the shapes and scale dimensions of the components of the invention. In the accompanying drawings: Fig. 1 is a schematic three-dimensional exploded view of the pressurized intervertebral fusion device with supplemental bone grafting of the present invention; Fig. Fig. 2 is a schematic diagram of the main body of the present invention; Fig. Figure 3 is a schematic representation of the insertion body and adjusting nut of the present invention; Fig. 4 is a schematic representation of the upper blade of the present invention; Fig. 5 is a schematic representation of the lower blade of the present invention; Fig. Figure 6 is a schematic representation of the mounting block of the present invention; Fig. Figure 7 is a schematic representation of the combined structure of the pressurized intervertebral fusion device with additional bone grafting of the present invention. EMBODIMENTS OF THE REGISTRATION

[0027] In order to enable those skilled in the art to better understand the technical solutions of the present invention, a clear and complete description of the technical solutions according to embodiments of the present invention is given below in conjunction with the accompanying drawings, and it is understood that the described embodiments represent only a part of the embodiments of the present invention and not all of them.

[0028] It should be noted that an element that is said to be "mounted" on another element may actually be directly on top of the other element, or there may be an intervening element. When an element is "mounted" on another element, it may be directly attached to the other element, or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and are not intended to be exclusive embodiments.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the description of the present invention are for the purpose of describing particular embodiments only and are not intended to be limiting. The term "and / or" as used herein includes all combinations of one or more of the relevant listed items.

[0030] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0031] As in Fig. 1, a pressurized intervertebral fusion device with supplemental bone grafting of the present invention comprises a main body 1, a blade assembly 2, an insertion body 3, an adjustment nut 4, and a fixing block 5. The blade assembly 2 is movably embedded in the main body 1.

[0032] As in Fig. 2, the main body 1 is a rectangular box without a top and bottom, the main body 1 comprising a front end surface 11, a rear end surface 13, and side walls 12, the front end surface 11 being parallel to the rear end surface 13, the number of side walls 12 being two, and both side walls 12 being perpendicular to the front end surface 11, and the side wall 12 being connected to the front end surface 11 at one end and to the rear end surface 13 at the other end. The box enclosed by the front end surface 11, the rear end surface 13, and the side walls 12 is provided in the center with a main body through hole 14 connecting the top and bottom surfaces of the main body 1.

[0033] The front end surface 11 is provided with a pre-injection through-hole 111 in the center. The pre-injection through-hole 111 is a circular hole, and four insertion holes 112 are provided on the periphery of the pre-injection through-hole 111. The insertion holes 112 are rectangular holes of the same size, and the four insertion holes 112 are located at the four corners of the same rectangle. Four insertion slots 121 are provided on the inside of the side walls 12. The position of the insertion slot 121 is arranged opposite to the position of the insertion hole 112. The upper edge of the insertion hole 112 abuts the upper edge of the insertion slot 121, and the lower edge of the insertion hole 112 abuts the lower edge of the insertion slot 121. The insertion slot 121 extends in a direction perpendicular to the front end surface 11.The rear end surface 13 is provided with a post-injection through-hole 131. The post-injection through-hole 131 is a circular hole, and the post-injection through-hole 131 is positioned opposite the pre-injection through-hole 111, with the line connecting the center of the post-injection through-hole 131 and the center of the pre-injection through-hole 111 running parallel to the side wall 12. The post-injection through-hole 14 is connected to the pre-injection through-hole 111. The outer side of the rear end surface 13 is curved and can be easily inserted into the spine.

[0034] As in Fig. 3, the insertion body 3 comprises a slider 31, an insertion rod 32 and a snap-in part 33, wherein the snap-in part 33 is C-shaped, and two insertion rods 32 are connected to the outside of the snap-in part 33, wherein the slider 31 is fastened to the inside of the end of the insertion rods 32, and wherein the top side of the slider 31 lies in the same plane as the top side of the insertion rod 32, the bottom side of the slider 31 lies in the same plane as the bottom side of the insertion rod 32.

[0035] The number of insertion bodies 3 is two. A total of four insertion rods 32 of two insertion bodies 3 can be inserted into the four insertion holes 112 simultaneously. All four insertion rods 32 can be inserted into the insertion slots 121. The side of the slider 31 farthest from the snap-in part 33 is the rear end chamfer. At the rear end chamfer of the two sliders 31 of the same insertion body 3, the distance between the two rear end chamfers is greater the closer the position to the snap-in part 33. In addition, the slider 31 is an oblique, parallel hexahedron.

[0036] The adjusting nut 4 is cylindrical. The adjusting nut 4 is provided with an annular slot 41 on its side surface. Two snap-in pieces 33 are snapped onto both sides of the annular slot 41. The snap-in pieces 33 can slide in the annular slot 41. The end face of the adjusting nut 4 is provided with a nut through-hole 42, the diameter of which is greater than or equal to the diameter of the pre-injection through-hole 111, thereby facilitating the filling of the pre-injection through-hole 111. The nut through-hole 42 is provided with rotation slots 43 on the outside to facilitate rotation of the adjusting nut 4 by the push rod. The number of rotation slots 43 is four, and the four rotation slots 43 are evenly spaced from each other.

[0037] As in Fig. As shown in Figure 1, the blade assembly 2 comprises an upper blade 21 and a lower blade 22, wherein the blade assembly 2 is provided with a blade slot on the side surface and is provided with a blade through-hole in the blade assembly 2 that extends through the top and bottom of the blade assembly 2. The blade slot comprises an upper blade slot 213 and a lower blade slot 223. The blade through-hole comprises an upper blade through-hole 211 and a lower blade through-hole 221.

[0038] As in Fig. 4, the upper blade 21 includes an upper blade skirt 215 and an upper blade plate member 212. An upper blade fitting hole 214 is opened on the end surface of the upper blade skirt 215. The upper blade fitting hole 214 fits with the upper part of the insertion body 3. The upper blade slots 213 are provided on both sides of the blade skirt 215, the upper blade slots 213 fit the slider 31, and the rear end chamfer of the slider 31 abuts against the upper blade slots 213, the inclination of the upper blade slots 213 being the same as the inclination of the rear end chamfer of the slider 31. An upper blade plate member 212 is attached above the upper blade skirt 215.The upper blade through-hole 211 is provided in the center of the upper blade plate member 212, and a plurality of parallel blade teeth are provided on the upper surface of the upper blade plate member 212 for easy attachment. The upper blade skirt 215 can be inserted into the main body through-hole 14 from above, and the upper blade plate member 212 has an edge dimension larger than the edge dimension of the top surface of the main body through-hole 14. When the upper blade 21 is mounted in the main body 1, the slider 31 is located at the top of the upper blade slots 213. When the slider 31 is pushed toward the rear end surface 13, the slider 31 moves downward along the upper blade slots 213. Due to the thrust of the slider 31, the upper blade 21 moves upward.

[0039] As in Fig. 5, the lower blade 22 includes a lower blade skirt 225 and a lower blade plate member 222. A lower blade fitting hole 224 is opened on the end surface of the lower blade skirt 225. The lower blade fitting hole 224 fits with the lower part of the insertion body 3. The lower blade slots 223 are provided on both sides of the lower blade skirt 225, the lower blade slots 223 fit the slider 31, and the rear end chamfer of the slider 31 abuts against the lower blade slots 223, the inclination of the lower blade slots 223 being the same as the inclination of the rear end chamfer of the slider 31. A lower blade plate member 222 is attached below the lower blade skirt 225.The lower blade through-hole 221 is provided in the center of the lower blade plate member 222, and the lower blade through-hole 221 has the same size as the upper blade through-hole 211. A plurality of parallel blade teeth are provided on the lower surface of the lower blade plate member 222. The lower blade skirt 225 can be inserted into the main body through-hole 14 from below, and the lower blade plate member 222 has an edge dimension larger than the edge dimension of the bottom surface of the main body through-hole 14. When the lower blade 22 is mounted in the main body 1, the slider 31 is located at the bottom of the lower blade slots 223. When the slider 31 is pushed toward the rear end surface 13, the slider 31 moves upward along the lower blade slots 213. Due to the thrust of the slide 31, the lower blade 22 moves downwards.

[0040] As in Fig. 6, the fixing block 5 is provided with a fastener through-hole 51 in the center. Slide rails 52 are provided in the fastener through-hole 51 on the left and right sides. The number of slide rails 52 is four. The position of the four slide rails 52 is arranged opposite to the position of the four insertion rods 32. Threads are provided on the upper and lower surfaces of the fastener through-hole 51. The adjusting nut 4 is mounted in the fastener through-hole 51, wherein the adjusting nut 4 can adjust with the threads of the fastener through-hole 51, and the adjusting nut 4 can be controlled forward or backward by rotating the adjusting nut 4.

[0041] As in Fig. 1 to 7, the upper blade plate member 212 and the lower blade plate member 222 have a length greater than that of the main body 1.

[0042] Four insertion rods 32 are inserted into four insertion holes 112, respectively. The snap-in part 33 of the insertion body 3 snaps into the annular slot of the adjusting nut 4, with the adjusting nut 4 being mounted in the fastener through-hole 51. The upper blade 21 is attached to the top of the main body 1, and the lower blade 22 is attached to the bottom of the main body 1. The upper blade plate member 212 is attached to the top of the mounting block 5 at the bottom, and the lower blade plate member 222 is attached to the top of the mounting block 5 at the bottom. Example

[0043] The specific embodiment of the present invention will be described below in connection with Fig.1 described in more detail.

[0044] In a preferred embodiment of the present invention, the pre-injection through-hole 111 and the post-injection through-hole 131 both have a diameter of 4.5 mm.

[0045] A pressurized intervertebral fusion device with additional bone grafting of the present invention is used by first routinely treating the nucleus pulposus tissue and the cartilage endplates within the relevant intervertebral space, whereby the decompression bone is introduced into the intervertebral space by means of a special bone graft funnel and a push rod.Second, according to the preoperative measurement of the intervertebral space height, a pressurized intervertebral fusion device with additional bone grafting of the present invention is inserted. By rotating the adjustment nut 4, the adjustment nut 4 is advanced, and the locking action of the annular slot 41 causes the insertion rods 32 to move forward along the slide rails 52, so that the slider 31 in the upper blade slot 213 moves downward and the slider 31 in the lower blade slot 223 moves upward. The upper blade 21 slides upward and the lower blade 22 slides downward, thereby increasing the preoperatively measured intervertebral space height by 2 mm.

[0046] The bone graft particles are inserted through the pre-injection through-hole 111 and introduced into the vertebral space through the upper blade through-hole 211 and the lower blade through-hole 221 to fill the bone volume missing due to the buttressing.

[0047] Finally, the adjustment nut 4 is rotated to apply pressure. Under the pressure of its own gravity and the tension of the annulus fibrosus, the sufficient amount of bone graft particles can better adhere to the upper and lower endplates, providing a solid guarantee for bone fusion.

[0048] The device components involved in the above embodiments are conventional device components unless specifically specified, and the manner in which the structure is constructed, functions, or is controlled is common in the art unless specifically specified.

[0049] Finally, the above examples are intended only to illustrate the technical solution of the invention and not to limit it. Any modifications or equivalent substitutions made to the technical solution of the invention by a person with ordinary skill in the art fall within the scope of the invention, provided they do not deviate from the scope of the following claims.

[0050] Reference numerals: 1 - main body, 2 - blade assembly, 21 - upper blade, 22 - lower blade, 3 - insertion body, 4 - adjusting nut, 5 - fixing block, 11 - front end face, 12 - side wall, 13 - rear end face, 14 - main body through hole, 111 - pre-injection through hole, 112 - insertion hole, 121 - insertion slot, 131 - post-injection through hole, 31 - slider, 32 - insertion rod, 33 - snap-in part, 41 - annular slot, 42 - nut through hole, 43 - rotary slot, 221 - lower blade through hole, 222 - lower blade plate member, 223 - lower blade slider, 224 - lower blade adjustment hole, 225 - lower blade skirt, 51 - Fastener through hole, 52 - slide rail.

Claims

[1] Pressurized intervertebral fusion device with additional bone grafting, comprising a main body (1), an adjusting nut (4) and a fixing block (5), wherein a main body through-hole (14) is provided in the main body (1) which connects the upper and lower surfaces of the main body (1), wherein a blade assembly (2) is movably embedded in the main body through-hole (14), wherein the blade assembly (2) is provided with a blade through-hole which extends through the upper and lower surfaces of the blade assembly (2), wherein an insertion body (3) is embedded in the blade assembly (2), wherein a side surface of the blade assembly (2) comprises a blade slot into which a slider (31) of the insertion body (3) is embedded, wherein the main body (1) is provided with a pre-injection through-hole (111) and an insertion hole (112), and a post-injection through-hole (131) is provided on the opposite side of the pre-injection through-hole (111), wherein the end face of the adjusting nut (4) is provided with a nut through-hole (42), wherein the insertion body (3) is inserted into the insertion hole (112) at one end and mounted in the adjusting nut (4) at the other end, wherein the mounting block (5) is provided with a fastener through-hole (51) which is internally threaded, wherein the adjusting nut (4) is mounted in the fastener through-hole (51), wherein the adjusting nut (4) drives the movement of the insertion body (3) to open or close the blade assembly (2). [2] Pressurized intervertebral fusion device with additional bone grafting according to claim 1, characterized byin that the blade assembly (2) comprises an upper blade (21) and a lower blade (22), wherein the upper blade (21) comprises an upper blade skirt (215) and an upper blade plate element (212), wherein the end surface of the upper blade skirt (215) is provided with an upper blade fitting hole (214) which fits the upper part of the insertion body (3), wherein the upper surface of the upper blade skirt (215) is connected to the upper blade plate element (212), wherein a plurality of blade teeth are provided on the upper surface of the upper blade plate element (212), and wherein the lower blade (22) has the same structure as the upper blade (21) and the upper blade (21) and the lower blade (22) are arranged up and down opposite one another. [3] Pressurized intervertebral fusion device with additional bone grafting according to claim 1 or 2, characterized byin that the main body (1) comprises a front end face (11), a rear end face (13) and side walls (12), wherein the front end face (11) runs parallel to the rear end face (13) and the side wall (12) runs perpendicular to the front end face (11), wherein the side wall (12) is connected at one end to the front end face (11) and at the other end to the rear end face (13). [4] Pressurized intervertebral fusion device with additional bone grafting according to claim 3, characterized by that the pre-injection through-hole (111) and the insertion hole (112) are arranged in the same plane, wherein the pre-injection through-hole (111) is arranged in the center of the front end surface (11) and the insertion hole (112) is arranged on the circumference of the pre-injection through-hole (111). [5] A pressurized intervertebral fusion device with additional bone grafting according to claim 3 or 4, characterized bythat an insertion slot (121) is provided on the inside of the side wall (12), the position of the insertion slot (121) being arranged opposite the position of the insertion hole (112). [6] Pressurized intervertebral fusion device with additional bone grafting according to one of claims 1 to 5, characterized by in that the insertion body (3) comprises an insertion rod (32) and a snap-in part (33), wherein the slider (31) and the snap-in part (33) are both attached to the insertion rod (32), and wherein the adjusting nut (4) is provided with an annular slot (41) on the side, wherein the snap-in part (33) snaps into the annular slot (41), wherein the insertion rod (32) pushes the slider (31) to slide in the blade slot. [7] Pressurized intervertebral fusion device with additional bone grafting according to claim 6, characterized bythat the number of insertion bodies (3) is two, and that the snap-in part (33) is C-shaped, two insertion rods (32) being connected to the outside of the snap-in part (33), the slider (31) being fastened to the inside of the end of the insertion rods (32). [8] Pressurized intervertebral fusion device with additional bone grafting according to claim 6, characterized by that slide rails (52) are provided in the fastener through-hole (51) on the left and right sides, the position of the slide rail (52) being arranged opposite the position of the insertion rod (32). [9] Pressurized intervertebral fusion device with additional bone grafting according to one of claims 1 to 8, characterized by that rotary slots (43) are provided on the outside of the nut through-hole (42), the number of rotary slots (43) being four. [10] Pressurized intervertebral fusion device with additional bone grafting according to one of claims 1 to 9, characterized by that the threads in the fastener through-hole (51) are provided on the upper surface of the fastener through-hole (51) and the lower surface of the fastener through-hole (51), the fastener through-hole (51) being unthreaded on both side surfaces.

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