CN111568610B - Lateral front approach cervical interbody fusion cage and matched bone grafting tool - Google Patents

Abstract

The invention relates to a side anterior approach cervical intervertebral fusion device and a matching bone grafting tool, belonging to the technical field of medical devices. The bone cavity is connected between the first support block and the second support block, the second support block is provided with a bone graft window, and the expansion structure includes a first elastic piece and a second elastic piece, and the first elastic piece and the second elastic piece are respectively located in the bone graft cavity There are through holes on the side wall of the bone graft cavity, and a blocking component is installed at the bone graft window to block the bone graft window to prevent the bone graft material from protruding in reverse, and a fixed structure is installed on the blocking component. The cage can be used for implantation from the cervical side anteriorly. Bone grafting tool includes injection tube, taper tube and piston. The injection tube is connected with the taper tube. There is a buckle groove on the outer wall of the injection tube. When in use, insert the injection tube into the bone grafting window, and push the bone graft material into it with the piston. Bone graft cavity to make the operation of fusion cage filled with bone graft material easier and more convenient.

Description

A side anterior approach cervical intervertebral fusion device and supporting bone grafting tool

technical field

The invention belongs to the technical field of medical devices, in particular to a cervical intervertebral fusion device with a side-anterior approach and a matching bone grafting tool.

Background technique

Anterior cervical decompression and fusion has always been a classic and effective surgical method for the treatment of cervical degenerative diseases. During the operation, the trachea and esophagus need to be stretched and the annulus fibrosus and anterior longitudinal ligament of the corresponding parts need to be resected. Therefore, This operation will destroy the segmental stability of the vertebrae, and there is a risk of postoperative complications such as dysphagia. In order to solve this technical problem, some researchers proposed to implant the fusion device from the side and front of the cervical spine. When performing fusion through the side and front approach, it is a small opening in the side and front of the intervertebral space, so that there is no need to pull the trachea and esophagus. Moreover, the original annulus fibrosus and the anterior longitudinal ligament in front of the patient can be preserved, which greatly reduces the instability of the operation and the chance of the patient having dysphagia caused by the operation.

The lateral and anterior approach to the cervical spine has a smaller surgical field of view, a smaller operating channel, and less space for fixation and implantation. The bone surface used for fixation is also different from the anterior approach. However, all fusion devices in the prior art are structures designed for anterior cervical decompression and fusion, and their structural dimensions and fixing methods are not suitable for the surgical approach on the side of the cervical spine. Therefore, a fusion device that can be applied to the front of the cervical spine Fusion devices for surgical approaches are urgently needed.

Contents of the invention

The invention provides a cervical intervertebral fusion device with a lateral anterior approach, which is used to solve the technical problem that the fusion device in the prior art cannot be applied to the lateral anterior surgical approach of the cervical spine.

The present invention is realized through the following technical solutions: a cervical intervertebral fusion device with lateral anterior approach, comprising:

Bone graft cavity, a first support block for supporting the left part of the intervertebral space, and a second support block for supporting the right part of the intervertebral space, the bone graft cavity is set on the first support block and the second support block Between, the second support block is provided with a bone graft window for inserting bone graft material, the bone graft window is connected to the bone graft cavity, and the four side walls of the bone graft cavity up, down, front and back All have through holes;

The bone graft cavity is also provided with an expansion structure that expands forward and backward. When the bone graft material is filled in the bone graft cavity, the bone graft material passes through the through hole and squeezes the expansion structure outward. expansion;

It also includes an occlusion component, which is detachably and fixedly installed at the bone graft window to block the bone graft window, and the occlusion component is provided with a fixing structure for fixing.

Further, in order to better realize the present invention, the expansion structure includes a first elastic piece and a second elastic piece, one end of the first elastic piece and one end of the second elastic piece are both connected to the first support block, The other end of the first elastic piece and the other end of the second elastic piece are both slidably installed on the second support block, and the first elastic piece is covered outside the through hole of the front side wall of the bone graft cavity, The second shrapnel cover is located outside the through hole on the rear side wall of the bone graft cavity.

Further, in order to better realize the present invention, an elastic buckle is provided on the inner wall of the bone graft window, and a buckle groove adapted to the elastic buckle is provided on the blocking member, and the elastic buckle is fastened to In the buckle groove, the blocking part includes a first plate, a second plate and a connecting rod, and the connecting rod is connected between the first plate and the second plate to form an I-shaped structure, so The buckle groove is formed between the first board, the second board and the connecting rod.

Further, in order to better realize the present invention, the fixing structure includes a first guide hole, a second guide hole, a first locking part and a second locking part, and the first guide hole and the second guide The holes are all arranged on the second plate, the first locking part is passed through the first guide hole and is detachably fixedly connected to a vertebra above the intervertebral space, and the second locking part The component is passed through the second guide hole and is detachably and fixedly connected to a vertebra below the intervertebral space.

Further, in order to better realize the present invention, both the first locking component and the second locking component are screws.

Further, in order to better realize the present invention, slide grooves are provided on the front side wall and the rear side wall of the second support block, and the other end of the first elastic piece and the other end of the second elastic piece are both A slider is provided, the slider on the first elastic piece is slidably installed in the slide groove on the front side wall of the second support block, and the slider on the second elastic piece is installed on the second support block in the chute on the rear side wall.

Furthermore, in order to better realize the present invention, both the first elastic piece and the second elastic piece are provided with a plurality of through holes.

Further, in order to better realize the present invention, both the top wall of the bone graft cavity and the bottom wall of the bone graft cavity are convex arc structures, and the upper surface of the bone graft cavity top wall and the The lower surface of the bottom wall of the bone graft cavity is provided with several anti-slip protrusions.

The present invention also provides a bone grafting tool, which is used for medical personnel to more conveniently inject the bone grafting material into the bone grafting window and the bone grafting cavity of the above-mentioned lateral anterior approach cervical intervertebral fusion device.

The bone grafting tool includes an injection tube, a tapered tube, a piston and the above-mentioned side anterior approach cervical intervertebral fusion device, the injection tube is connected with the tapered tube to form a funnel structure, and the injection tube is far away from the outer wall of one end of the tapered tube There is a card slot adapted to the elastic buckle, a push rod is arranged on the piston and the piston is adapted to the injection tube.

Further, in order to better realize the present invention, a handle is also included, and the handle is connected to the end face of the conical tube away from the injection tube.

Compared with the prior art, the present invention has the following beneficial effects:

1. The cervical intervertebral fusion device with lateral anterior approach provided by the present invention comprises a bone graft cavity, a first support block, a second support block, a first elastic piece, a second elastic piece and a blocking component, wherein the bone graft cavity is located in the first Between the support block and the second support block, the first support block and the second support block are used to support the left and right parts of the intervertebral space respectively, and the above bone graft cavity can be supported in the middle of the intervertebral space and above and below the bone graft cavity. Through holes are provided on the front and rear four side walls, and a bone graft window is provided on the second support block. The bone graft window communicates with the bone graft cavity, and both the first elastic piece and the second elastic piece are connected to the above first support block. , and the ends of the first elastic piece and the second elastic piece away from the first support block are slidably connected to the above-mentioned second support block, and the first elastic piece and the second elastic piece are respectively covered in the through hole of the front side wall of the bone graft cavity and the implant Outside the through hole on the back and side wall of the bone cavity, when in use, the side-anterior approach cervical fusion cage is implanted into the patient's intervertebral space from the side-anterior approach of the cervical spine, and the first support block, the bone graft cavity and the second support At this time, because there is no object in the bone graft cavity to press the first elastic piece and the second elastic piece, the first elastic piece and the second elastic piece are attached to the outer wall of the bone graft cavity at this time, and the size is compact, so that It is implanted from the front side of the cervical spine. After implantation, the medical staff will inject the bone graft material into the bone graft cavity through the bone graft window. As the amount of bone graft material in the bone graft cavity increases, the bone graft material will flow from the bone graft The through hole on the side wall of the cavity extrudes the bone cavity, the bone graft material coming out of the through hole on the front side wall of the bone graft cavity will squeeze the first shrapnel, and the bone graft material coming out of the through hole on the back side wall of the bone graft cavity will squeeze The second shrapnel, the first shrapnel and the second shrapnel will produce elastic deformation and expand outward to form a vertically penetrating fan-shaped area between the first shrapnel and the bone graft cavity and between the second shrapnel and the bone graft cavity, At the same time, the fan-shaped area will also be filled with bone graft material to expand the bone graft area and the bone graft material in the fan-shaped area will be able to grow better. After the bone graft material is filled, the occlusion part can be installed at the bone graft window, so as to prevent the bone graft material in the bone graft cavity from protruding in reverse and leaking. A fixing structure is provided on the occlusion part. structure, the entire lateral anterior approach cervical intervertebral fusion cage can be fixed on the side wall of the intervertebral space, and the fixing structure is fastened from the lateral anterior aspect of the cervical spine, which is suitable for implantation in the lateral anterior approach of the cervical spine;

2. The present invention provides a bone grafting tool used in conjunction with the above-mentioned side anterior approach cervical intervertebral fusion device, including an injection tube, a taper tube and a piston. The injection tube is connected with the taper tube to form a funnel structure, and the injection tube is provided with a clip Groove, the piston is adapted to the injection tube and the piston is provided with a push rod. When in use, insert the injection tube into the bone graft window and connect the slot with the elastic buckle at the bone graft window, so that the bone graft tool can be connected to the above bone graft window. The cervical intervertebral fusion cage through the side-anterior approach forms a whole. The medical staff puts the bone graft material from the tapered tube and uses the above-mentioned piston to push the bone graft material into the bone graft cavity through the injection tube. The setting of the push rod can make the pushing The process is more convenient, and the bone grafting tool makes the operation of putting the bone grafting material into the bone grafting cavity simpler and more convenient.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a schematic structural view of using a bone graft tool to inject bone graft material into a bone graft cavity in an embodiment of the present invention;

Fig. 2 is a schematic structural view of the side anterior approach cervical intervertebral fusion device filled with bone graft material in an embodiment of the present invention;

Fig. 3 is a cross-sectional view of A-A in Fig. 2 .

In the picture:

1-Bone graft cavity; 2-First support block; 3-Second support block; 31-Bone graft window; 4-First shrapnel; 5-Second shrapnel; Handle; 8-elastic buckle; 9-first locking part; 10-second locking part; 11-slider; 12-fine hole; 13-convex part; 14-injection tube; 15-taper tube; 16-piston; 17-push rod.

detailed description

In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other implementations obtained by persons of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

Example 1:

This embodiment provides a cervical intervertebral fusion device with a lateral front approach, which can be implanted into the intervertebral space from the front side of the cervical spine for bone grafting.

This lateral anterior approach cervical intervertebral fusion device includes a bone graft cavity 1, a first support block 2 and a second support block 3, and the above bone graft cavity 1 is connected between the first support block 2 and the second support block 3, during use , implant the entire cage into the intervertebral space from the front side of the cervical vertebrae, and make the first support block 2, the bone graft cavity 1 and the second support block 3 enter the intervertebral space in sequence, and the first support block 2 is supported on the left part of the intervertebral space, The second support block 3 is supported on the right part of the intervertebral space, and the bone graft cavity 1 is supported on the middle part of the intervertebral space. The above-mentioned second support block 3 is provided with a bone graft window 31, and the bone graft window 31 is connected to the above-mentioned bone graft cavity 1, so as to insert bone graft material into the bone graft cavity 1 through the bone graft window 31. Through holes are arranged on the upper, lower, front and rear side walls of the bone cavity 1, and when the amount of bone graft material in the bone graft cavity 1 reaches a certain level, the bone graft material will be extruded from the through holes.

An expansion structure is also provided outside the bone graft cavity 1, and the expansion structure can expand toward the front and rear directions. When the bone graft cavity 1 is filled or filled with bone graft material, the bone graft material passes through the front and side walls of the bone graft cavity 1 and The through hole on the rear side wall squeezes the expansion structure so that the expansion structure expands outwards, and at this time, the expansion structure will be filled with bone graft material. As a best implementation mode of this embodiment, the expansion structure in this embodiment includes a first elastic piece 4 and a second elastic piece 5 .

The first elastic piece 4 is connected on the front side wall of the first support block 2, and the second elastic piece 5 is connected on the rear side wall of the first support block 2. It is worth noting that the first elastic piece 4 and the second elastic piece 5 are both It is an elastic thin sheet structure, and both the first elastic piece 4 and the second elastic piece 5 can produce elastic bending when subjected to a pressing force. The other end of the first elastic piece 4 and the other end of the second elastic piece 5 are all slidably installed on the second support block 3, and the first elastic piece 4 covers outside the through hole on the front side wall of the bone graft cavity 1, and the second elastic piece 5 Covered outside the through hole on the rear side wall of the bone graft cavity 1, when the bone graft material in the bone graft cavity 1 is extruded from the through hole on the front side wall, the first shrapnel 4 will be pressed outwards, and the first shrapnel 4 will be pressed outward. A shrapnel 4 will bend and expand outwards, and the bone graft material extruded from the through hole on the rear side wall of the bone graft cavity 1 will extrude the second shrapnel 5, so that the second shrapnel 5 bends and expands toward the outside. At this time, a fan-shaped area will be formed between the first elastic piece 4 and the bone graft cavity 1 and between the second elastic piece 5 and the bone graft cavity 1, and the fan-shaped area will also be filled with bone graft material. The upper and lower sides of the fan-shaped area are connected, and the bone graft material in it can grow, and the two fan-shaped areas correspond to the front end and the rear end of the middle part of the intervertebral space respectively. According to the research, the growth effect of the front and rear bone graft materials in the middle of the intervertebral space is better. Therefore, with the above structure, bone graft materials are put into the front and rear ends of the middle of the intervertebral space respectively through a fan-shaped area to obtain better results. bone graft growth effect.

Also comprise occlusion part 6, after bone graft material is filled in bone graft cavity 1 and fan-shaped area, then this occlusion part 6 is contained in above-mentioned bone graft window 31 place, at this moment, this occlusion part 6 can bone graft window 31 is blocked, to avoid the bone graft material in the bone graft cavity 1 to protrude in reverse and come out from the bone graft window 31. A fixing structure is also provided on the occluding component 6 , by means of the fixing structure, the entire side anterior approach cervical intervertebral fusion cage can be fixed on the side wall of the intervertebral space.

With the above-mentioned structure, when the cervical intervertebral fusion device with anterior side approach provided by this embodiment is not filled with bone graft material, the first elastic piece 4 and the second elastic piece 5 are attached to the front and rear side walls of the bone graft cavity 1 respectively, so that the whole The structure is more compact and small, so that it can be implanted into the intervertebral space from the side and front of the cervical spine. After the bone graft material is inserted, the first elastic piece 4 and the second elastic piece 5 expand outward to form the required bone graft accommodation cavity, and then Bone grafting between the vertebrae. In addition, the fixing structure of the cervical intervertebral fusion device in the lateral anterior approach is arranged on the occlusion component 6, and the occlusion component 6 is installed at the bone graft window 31, so as to facilitate the operation at the side and front of the cervical spine. Therefore, the lateral anterior approach cervical intervertebral fusion device provided in this embodiment can be adapted to be implanted from the cervical vertebrae laterally and anteriorly, and there is no need to pull the trachea and esophagus during the operation, and it will not damage the patient's original fibrous membrane and ligaments. Cause damage, reduce the chance of patients suffering from swallowing difficulties, increase the stability of the postoperative stage, and promote early rehabilitation training to help patients return to work as soon as possible.

Example 2:

This embodiment serves as a specific implementation of the above-mentioned embodiment. In this embodiment, an elastic buckle 8 is provided on the inner wall of the above-mentioned bone graft window 31, and a buckle groove 61 is provided on the above-mentioned blocking member 6. When the blocking member 6 When the bone graft window 31 is blocked, the above-mentioned elastic buckle 8 is buckled in the buckle groove 61 . The installation of this structure is simple and convenient, and by means of the connection between the elastic buckle 8 and the buckle groove 61 , the blocking member 6 can be stably blocked in the bone graft window 31 .

As a best implementation mode of this embodiment, the blocking member 6 in this embodiment includes a first plate, a second plate and a connecting rod, and the connecting rod is connected between the first plate and the second plate. The first board, the second handle and the connecting rod form an I-shaped structure, and the above-mentioned buckle groove 61 is formed between the first board, the connecting rod and the second board. The blocking part of this structure is simple to manufacture and convenient to use.

It should be noted that the above-mentioned first plate is adapted to the opening of the above-mentioned bone graft window 31. When in use, the first plate is inserted into the above-mentioned bone graft window 31 and passed through the above-mentioned elastic buckle 8, so that the elastic snap The buckle 8 is put into the buckle groove 61 between the first plate and the second plate for locking, and the second plate is located outside the vertebral window 31 . The first plate then blocks the above-mentioned bone graft window 31 .

Example 3:

This embodiment is a best implementation mode of Embodiment 2. The fixing structure in this embodiment includes a first guide hole, a second guide hole, a first locking component 9 and a second locking component 10, wherein the first A guide hole and a second guide hole are both arranged on the above-mentioned second plate, the first locking member 9 passes through the first guide hole and is detachably fixedly connected to a vertebra above the intervertebral space, the second locking member 10 is passed through the second guide hole and is detachably fixedly connected to a vertebra below the intervertebral space. As a best implementation manner of this embodiment, the first locking component 9 and the second locking component 10 of this embodiment are both screws.

By adopting the above-mentioned structure, by installing screws from the second plate toward the side wall of the intervertebral space, the operation is more simple and convenient, so that the operation can be performed from the front side of the cervical spine.

Example 4:

This embodiment is a best implementation mode of the above-mentioned embodiment. In this embodiment, the front side wall and the rear side wall of the second support block 3 are provided with a chute, and the first elastic piece 4 and the second elastic piece 5 There is a slider 11 on each of them. When installing, slide the slider 11 on the first elastic piece 4 into the chute on the front side wall of the second supporting block 3, and slide the slider 11 on the second elastic piece 5. Installed in the chute on the rear side wall of the second support block 3. In this way, when the first elastic piece 4 and the second elastic piece 5 are compressed by the bone graft material to produce elastic deformation and expand outward, both the first elastic piece 4 and the second elastic piece 5 can slide on the second support block 3, So that the fan-shaped area between the first elastic piece 4 and the bone graft cavity 1 and the fan-shaped area between the second elastic piece 5 and the bone graft cavity 1 can cover a wider area.

Example 5:

This embodiment is a more optimal implementation mode of the above-mentioned embodiment. In this embodiment, a number of through holes 12 are provided on the first elastic piece 4 and the second elastic piece 5, so that the nutrients in the intervertebral space can pass through. Enter the fan-shaped area through the pores 12, so that nutrients can reach the bone graft material in the fan-shaped area more smoothly, thereby nourishing the growth of the bone graft material therein.

As a best implementation mode of this embodiment, in this embodiment, the top wall and the bottom wall of the above-mentioned bone graft cavity 1 are all convex arc structures, so as to fit with the side walls of the intervertebral space, that is, to The edges of the endplates are shaped to form a more secure support in the intervertebral space. Moreover, several protrusions 13 are provided on the upper surface of the top wall of the bone graft cavity 1 and the lower surface of the bottom wall of the bone graft cavity 1, and the friction force can be increased when the protrusions 13 contact the side walls of the intervertebral space. This further makes the cervical intervertebral fusion device provided by this embodiment more stably installed in the intervertebral space.

Embodiment 6:

This embodiment provides a bone implant tool, which is used in conjunction with the lateral anterior approach cervical intervertebral fusion device provided in the above embodiment. The bone grafting tool includes an injection tube 14, a tapered tube 15 and a piston 16, wherein the injection tube 14 is connected to the tapered tube 15 to form a funnel structure, and the outer wall of the injection tube 14 away from the tapered tube 15 is provided with a slot 141. The snap-in groove 141 is adapted to the elastic buckle 8 at the above-mentioned bone graft window 31. During installation, the injection tube 14 is inserted into the bone graft window 31 and the elastic buckle 8 is snapped into the snap-in groove 141, so that the The bone grafting tool is connected with the above-mentioned lateral anterior approach cervical intervertebral fusion device to form a whole. The user can hold the bone grafting tool to fix the position of the entire lateral anterior approach cervical intervertebral fusion device, and then move toward the tapered tube 15 Inject the bone graft material, and by means of the taper tube 15, the bone graft material can be better accumulated at the bone graft tool, and then the piston 16 is used to push the bone graft material into the bone graft window 31 and the bone graft cavity 1 through the injection tube 14, A push rod 17 is arranged on the piston 16, so that the medical staff can push it.

The bone grafting tool with this structure can simplify the operation of injecting bone grafting material into the above-mentioned lateral anterior approach cervical intervertebral fusion device.

It is worth noting that the medical staff used tweezers to place the bone graft material into the above-mentioned funnel structure.

As a better implementation mode of this embodiment, in this embodiment, a handle 7 is provided on the end surface of the tapered tube 15 away from the injection tube 14 . During use, the medical staff can hold the handle 7 to hold the whole bone grafting tool, further enhancing the convenience of operation.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone familiar with the technical field can easily think of changes or substitutions within the technical scope of the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (9)

1. A side anterior approach cervical intervertebral fusion device, is characterized in that, comprises: Bone graft cavity, a first support block for supporting the left part of the intervertebral space, and a second support block for supporting the right part of the intervertebral space, the bone graft cavity is set on the first support block and the second support block Between, the second support block is provided with a bone graft window for inserting bone graft material, the bone graft window is connected to the bone graft cavity, and the four side walls of the bone graft cavity up, down, front and back All have through holes; The bone graft cavity is also provided with an expansion structure that expands forward and backward. When the bone graft material is filled in the bone graft cavity, the bone graft material passes through the through hole and squeezes the expansion structure outward. expansion; It also includes an occlusion component, which is detachably and fixedly installed at the bone graft window to block the bone graft window, and the occlusion component is provided with a fixing structure for fixing; The expansion structure includes a first elastic piece and a second elastic piece, one end of the first elastic piece and one end of the second elastic piece are connected to the first support block, the other end of the first elastic piece is connected to the The other ends of the second elastic pieces are all slidably installed on the second support block, and the first elastic piece covers the through hole of the front side wall of the bone graft cavity, and the second elastic piece covers the bone graft. Outside the through hole in the rear side wall of the cavity. 2. A cervical intervertebral fusion device according to claim 1, characterized in that: the inner wall of the bone graft window is provided with elastic buckles, and the blocking part is provided with elastic buckles. A suitable buckle groove, the elastic buckle is fastened in the buckle groove, the blocking part includes a first plate, a second plate and a connecting rod, and the connecting rod is connected between the first plate and the An I-shaped structure is formed between the second plates, and the buckle groove is formed between the first plate, the second plate and the connecting rod. 3. A cervical intervertebral fusion device according to claim 2, wherein the fixing structure includes a first guide hole, a second guide hole, a first locking component and a second locking component , the first guide hole and the second guide hole are both arranged on the second plate, the first locking member is passed through the first guide hole and is detachably fixedly connected to the vertebra On a vertebra above the gap, the second locking component is passed through the second guide hole and detachably fixedly connected to a vertebra below the vertebra gap. 4 . The cervical intervertebral fusion device according to claim 3 , wherein the first locking member and the second locking member are both screws. 5. The cervical intervertebral fusion device according to claim 3, characterized in that: the front side wall and the rear side wall of the second support block are provided with slide grooves, and the first elastic piece The other end of the second elastic piece and the other end of the second elastic piece are provided with a slider, the slider on the first elastic piece is slidably installed in the slide groove on the front side wall of the second support block, the second The slide block on the elastic piece is installed in the slide groove on the rear side wall of the second support block. 6 . The cervical intervertebral fusion device with lateral anterior approach according to claim 2 , characterized in that: the first elastic piece and the second elastic piece are both provided with a plurality of through holes. 7 . 7. The cervical intervertebral fusion device according to claim 2, characterized in that: the top wall of the bone graft cavity and the bottom wall of the bone graft cavity are convex arcs structure, and the upper surface of the top wall of the bone graft cavity and the lower surface of the bottom wall of the bone graft cavity are provided with several anti-slip protrusions. 8. A bone graft tool matched with the cervical intervertebral fusion device described in any one of claims 2-7, characterized in that: comprising injection tube, tapered tube and piston, the injection tube and the The tapered pipe is connected to form a funnel structure, the outer wall of the injection pipe away from the tapered pipe is provided with a card slot adapted to the elastic buckle, the piston is provided with a push rod and the piston is connected to the Fits the syringe described above. 9 . The bone implant tool according to claim 8 , further comprising a handle connected to an end surface of the taper tube away from the injection tube. 10 .

Images