Total endoscopic fusion cage device for bone grafting

Abstract

The invention discloses a total endoscopic fusion cage device for bone grafting. The total endoscopic fusion cage device comprises a pushing and injecting part, an injecting part and an injecting outer shell which are sequentially connected from inside to outside in a sleeving mode. The injection part and the injection outer shell are detachably connected through a connecting part; the injection device further comprises a retractable embedded bag body which is detachably connected with the injection outer shell body. The injection part comprises a first injection part and a second injection part which are sequentially matched with the injection outer shell for use, and an open hole matched with the filling opening of the embedded bag body is formed in the side face of the top of the first injection part; the top end of the second injection part is of an opening structure; the injection outer shell is provided with a side opening and a top opening which are matched with the first injection part and the second injection part respectively. According to the invention, the embedded capsule body structure can be unfolded through the implantation of pushing and injecting bone cement, and the bone cement is matched with the embedded capsule body to be implanted into each vertebral body gap, so that the accurate control on the implementation position and angle is realized, and the technical requirement of uniform distribution of bone grafting materials is met.

Description

Technical Field

[0001] The invention relates to the technical field of spinal surgical instruments, in particular to a fully endoscopic fusion device capable of bone implantation. Background Art

[0002] In the field of spinal surgery, especially in the treatment process involving spinal fusion, traditional surgical methods often have problems such as large surgical trauma, long recovery period, and high risk of complications. With the continuous advancement of medical technology, minimally invasive spinal fusion device implantation has gradually become an important way to solve the above problems, which can promote the fusion between vertebrae. Minimally invasive spinal fusion devices are designed to provide stability support and biocompatibility between the patient's vertebrae, reduce the possibility of complications caused by surgical trauma, help protect the implant area and promote bone healing. In minimally invasive spinal fusion surgery, bone grafting is often accompanied, that is, placing materials such as autologous bone or allogeneic bone in the intervertebral space.

[0003] However, existing minimally invasive spinal fusion devices still have many deficiencies in terms of structural design, operational flexibility, and surgical precision, and are difficult to meet the clinical needs for efficient, safe, and precise minimally invasive surgical operations. Specifically, traditional fusion devices often have difficulty in achieving precise control of the implementation position and angle during the bone grafting process, resulting in uneven distribution of bone graft materials, affecting the fusion effect. At the same time, the fusion device lacks stability during the operation and is prone to displacement due to improper operation, increasing the risk and difficulty of the operation. In addition, existing fusion devices are often more complex in structural design, which is not convenient for rapid assembly and disassembly during the operation, affecting the efficiency of the operation.

[0004] In view of the above problems, there is an urgent need for a bone-grafting fully endoscopic fusion device with ingenious structure, convenient operation and high precision to meet the needs of efficient, safe and precise operation in spinal surgery. Summary of the invention

[0005] In order to solve or at least address the problems raised in the above background technology, the present invention provides a bone-graftable fully endoscopic fusion device.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A bone-graftable fully endoscopic fusion device comprises a push injection part, an injection part and an injection outer shell which are sequentially sleeved from the inside to the outside; the injection part and the injection outer shell are detachably connected via a connecting part;

[0008] Also included is a collapsible embedding capsule detachably connected to the injection shell;

[0009] The injection part includes a first injection part and a second injection part which are used in conjunction with the injection outer shell in sequence. The top side of the first injection part is provided with an opening which cooperates with the filling port of the embedded capsule; the top of the second injection part is an open structure; the injection outer shell is provided with a side opening and a top opening which cooperate with the first injection part and the second injection part respectively.

[0010] As a further solution of the present invention, the push injection portion includes a piston rod and a piston handle connected to one end of the piston rod.

[0011] As a further solution of the present invention, the injection part includes an injection tube, an injection tube sheath, an injection tube handle and an injection head. The piston rod can be movably inserted into the injection tube, the injection tube sheath is sleeved on the outer side of one end of the injection tube, the injection head is connected to the end of the injection tube away from the injection tube sheath, and the injection tube handle is connected to the outer side of one end of the injection tube sheath.

[0012] As a further solution of the present invention, the injection head includes an injection straight hole, a first injection side hole and a second injection side hole, wherein the injection straight hole is arranged at the end of the injection head away from the injection tube, forming a channel with the injection tube; the first injection side hole is arranged on the side of the injection head, forming two channels with the injection tube; the second injection side hole is arranged on the side of the injection head, forming three channels with the injection tube; the first injection side hole and the second injection side hole are located in the same plane.

[0013] As a further solution of the present invention, the connecting part includes a syringe tube connecting buckle and an outer tube connecting buckle, wherein the syringe tube connecting buckle and the outer tube connecting buckle are detachably connected, and the syringe tube connecting buckle is connected to the outer side of the end of the syringe tube sheath away from the syringe tube handle.

[0014] As a further solution of the present invention, the injection outer shell includes an outer tube, a gripping handle and an outer tube side hole. The gripping handle is connected to the outer side of one end of the outer tube, and the outer tube side hole is arranged on the outer side of the other end of the outer tube to cooperate with the filling port of the embedded capsule. The injection tube can be movably inserted into the outer tube, and the outer tube connecting buckle is connected to the outer side of the outer tube near one end of the gripping handle.

[0015] As a further solution of the present invention, the injection outer shell further comprises an outer cylinder straight hole, which is arranged at one end of the outer cylinder away from the gripping handle, and the outer cylinder straight hole is connected to a channel.

[0016] As a further solution of the present invention, the outer cylinder side hole includes a first outer cylinder side hole and a second outer cylinder side hole, wherein the first outer cylinder side hole is connected to two channels or three channels, and the second outer cylinder side hole is connected to three channels or two channels.

[0017] As a further solution of the present invention, the injection part further includes a position limiting and positioning device, wherein the position limiting and positioning device is connected to the outside of the injection tube and is used to fix the injection tube at a target position in the outer cylinder.

[0018] As a further solution of the present invention, the material of the embedded capsule is a medical biological material, which is used to be filled with a specific injection material and expanded and fixed at a target position.

[0019] As a further solution of the present invention, the injection tube connecting buckle is connected to the outer tube connecting buckle by threads.

[0020] As a further solution of the present invention, the length of the injection tube and the outer cylinder is 10 mm to 30 mm.

[0021] As a further solution of the present invention, the outer surface of the connecting portion is further provided with anti-slip grooves.

[0022] As a further solution of the present invention, the injection tube and the outer tube are both made of medical transparent materials.

[0023] On the other hand, the present invention also provides a method for using a bone-grafting fully endoscopic fusion device, the steps comprising:

[0024] (1) The first injection part and the injection outer shell are matched and sleeved together, and the top end of the injection outer shell, i.e., the embedded capsule, is inserted into the site to be acted on;

[0025] (2) filling the first injection part with bone cement material, and using the push injection part to push the bone cement into the embedded capsule to expand the embedded capsule;

[0026] (3) The second injection part and the injection outer shell are matched and sleeved together, bone cement material is filled into the second injection part, and the bone cement is pushed and transported to the middle area of ​​the two side capsules of the expanded embedded capsule by the push injection part; after the bone cement is formed, the injection outer shell and the embedded capsule are separated.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. The present invention provides a bone-graftable fully endoscopic fusion device, which can expand the embedded capsule structure by pushing the bone cement. Compared with the traditional endoscopic surgery, the fusion device implantation method is simpler, the structure is ingenious and the layout is reasonable, which helps to improve the popularity and success rate of the device. The fusion device of the system uses bone cement, an implant material with good biocompatibility, strong plasticity and high strength, which can be implanted in each vertebral space with the embedded capsule, so as to achieve precise control of the implementation position and angle, and meet the technical requirements for uniform distribution of bone grafting materials.

[0029] 2. The present invention further arranges an outer tube structure based on the injection tube, and by providing a limit positioning device, the injection tube of the device of the present invention can be accurately positioned to the implementation area, which is convenient for the effective deployment and limited injection of the qualitative capsule, and solves the problems of insufficient positioning stability and accuracy of the fusion device in the prior art, and effectively meets the actual clinical needs of effective cooperation between the fusion device implantation device and the existing spinal endoscope.

[0030] 3. The present invention further provides a connection part based on the injection tube and the outer tube. By providing a detachable threaded connection, the injection tube, the outer tube and the push injection part of the device of the present invention can be detached from each other, and the device of the present invention can be effectively stored and assembled. In addition, the present invention also realizes the switching between the two technical solutions of embedded capsule filling and secondary injection, and can achieve effective positioning of the secondary injection, avoiding the problem of qualitative capsule slipping from the intervertebral space and filling the gap, and further improving the filling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic structural diagram of a bone-graftable fully endoscopic fusion device provided in Example 1 of the present invention.

[0032] Figure 2 This is a front view of a bone-grafting fully endoscopic fusion device provided in Example 1 of the present invention.

[0033] Figure 3 This is a schematic structural diagram of an unfilled state of a bone-graftable fully endoscopic fusion device provided in Example 1 of the present invention.

[0034] Figure 4 This is a front view of an unfilled state of a bone-graftable fully endoscopic fusion device provided in Example 1 of the present invention.

[0035] Figure 5 This is a schematic structural diagram of a bone-graftable fully endoscopic fusion device provided in Example 2 of the present invention.

[0036] Figure 6 This is a front view of a bone-grafting fully endoscopic fusion device provided in Example 2 of the present invention.

[0037] Figure 7 This is a schematic structural diagram of the injection portion of a bone-grafting fully endoscopic fusion device provided by the present invention.

[0038] In the figure: 10, injection unit;

[0039] 101. piston rod; 102. piston handle;

[0040] 20. Injection part;

[0041] 201, injection tube; 202, injection tube sheath; 203, injection tube handle; 204, injection head; 205, limit positioning device;

[0042] 2041, injection straight hole; 2042, first injection side hole; 2043, second injection side hole;

[0043] 30. Connecting part;

[0044] 301, injection tube connection buckle; 302, outer tube connection buckle; 303, anti-slip pattern;

[0045] 40. Injection shell;

[0046] 401. Outer cylinder; 402. Holding handle; 403. Side hole of the outer cylinder; 404. Straight hole of the outer cylinder;

[0047] 4031. Side hole of the first outer cylinder; 4032. Side hole of the second outer cylinder;

[0048] 50. Embedded in capsule. DETAILED DESCRIPTION

[0049] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods.

[0050] 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 used to limit the present invention.

[0051] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention; the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance; in addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] Example 1

[0053] The inventors of the present invention have found that the existing minimally invasive spinal fusion devices still have many deficiencies in terms of structural design, operational flexibility, surgical precision, etc., and it is difficult to meet the clinical demand for efficient, safe, and precise minimally invasive surgical operations. Specifically, it is often difficult for traditional fusion devices to achieve precise control of the implementation position and angle during the bone grafting process, resulting in uneven distribution of bone grafting materials, which affects the fusion effect. At the same time, the fusion device lacks stability during the operation and is easily offset due to improper operation, which increases the risk and difficulty of the operation. In addition, the existing fusion devices are often complex in structural design, which is not convenient for rapid assembly and disassembly during the operation, affecting the efficiency of the operation.

[0054] In view of this,

[0055] The present embodiment provides a bone-grafting fully endoscopic fusion device, comprising a push injection part 10, an injection part 20 and an injection outer shell 40 which are sequentially sleeved from the inside to the outside; the injection part 20 and the injection outer shell 40 are detachably connected via a connecting part 30;

[0056] It also includes a collapsible embedding capsule 50 detachably connected to the injection outer shell 40;

[0057] The injection part 20 includes a first injection part and a second injection part which are used in conjunction with the injection outer shell 40 in sequence. The top side of the first injection part is provided with an opening which cooperates with the filling port of the embedded capsule 50; the top of the second injection part is an open structure; the injection outer shell 40 is provided with a side opening and a top opening which cooperate with the first injection part and the second injection part respectively.

[0058] The specific use of this bone-grafting fully endoscopic fusion device includes:

[0059] 1. Fit the first injection part and the injection outer shell 40 together, and insert the top end of the injection outer shell 40, i.e. the embedding capsule 50, into the site to be acted on;

[0060] 2 Fill the first injection part with bone cement material, and use the push injection part 10 to push the bone cement into the embedding capsule 50 so that the embedding capsule 50 expands;

[0061] 3. The second injection part and the injection outer shell 40 are matched and sleeved, and the bone cement material is filled into the second injection part. The push injection part 10 is used to push and transport the bone cement to the middle area of ​​the two side capsules of the expanded embedding capsule 50; after the bone cement is formed, the injection outer shell 40 and the embedding capsule 50 are separated.

[0062] In further embodiments, see Figure 1-2 , Figure 1 This is a structural diagram of a bone-graftable fully endoscopic fusion device provided in Example 1 of the present invention. Figure 2A front view of a bone-graftable fully endoscopic fusion device provided in Example 1 of the present invention. The present invention provides a bone-graftable fully endoscopic fusion device, comprising: a push injection unit 10, the push injection unit 10 comprising a piston rod 101 and a piston handle 102 connected to one end of the piston rod 101; an injection unit 20, the injection unit comprising an injection tube 201, an injection tube sheath 202, an injection tube handle 203 and an injection head 204, the piston rod 101 being movably inserted into the injection tube 201, the injection tube sheath 202 being sleeved on the outer side of one end of the injection tube 201, the injection head 204 being connected to the end of the injection tube 201 away from the injection tube sheath 202, and the injection tube handle 203 being connected to the outer side of one end of the injection tube sheath 202; a connecting unit 30, the connecting unit 30 comprising an injection tube connecting buckle 301 and an outer tube connecting buckle 302, wherein the injection tube connecting buckle 301 is provided to the outer side of the injection tube sheath 202. 01 is detachably connected to the outer tube connecting buckle 302, and the injection tube connecting buckle 301 is connected to the outer side of the injection tube sheath 202 away from the injection tube handle 203; the injection outer shell 40, the injection outer shell includes an outer tube 401, a gripping handle 402 and an outer tube side hole 403, wherein the gripping handle 402 is connected to the outer side of one end of the outer tube 401, and the outer tube side hole 403 is arranged on the outer side of the other end of the outer tube 401, the injection tube 201 can be movably inserted into the outer tube 401, and the outer tube connecting buckle 302 is connected to the outer side of the outer tube 401 close to the gripping handle 402; the embedded capsule 50, the embedded capsule 50 is detachably connected to the outer tube side hole 403, and is used to limit the embedded capsule 50 to the target position for intervertebral fusion when the embedded capsule 50 is filled and expanded. The present invention can realize the expansion of the embedded capsule 50 structure by implanting the pushed bone cement. Compared with the traditional endoscopic surgery, the fusion device implantation method is simpler, the structure is cleverly set and the layout is reasonable, which helps to improve the popularity and success rate of the device. The fusion device of this system uses bone cement, an implant material with good biocompatibility, strong plasticity and high strength. It can be implanted in each vertebral space with the embedded capsule 50 to achieve precise control of the implementation position and angle, and meet the technical requirements for uniform distribution of bone grafting materials.

[0063] See also Figure 7 , Figure 7A schematic diagram of the injection structure of a bone-grafting fully endoscopic fusion device provided by the present invention. In order to achieve the effect of pushing the bone cement to the patient's target position, i.e., the intervertebral space to be treated and the bone cement embedded in the capsule 50, the bone cement is output in cooperation with the push injection 10. In Example 1 of the present invention, the injection head 204 is a bottomless hollow truncated cone structure, including an injection straight hole 2041, a first injection side hole 2042, and a second injection side hole 2043, wherein the injection straight hole 2041 is arranged at the end of the injection head 204 away from the injection tube 201, forming a channel with the injection tube 201; the first injection side hole 2042 is arranged at the side of the injection head 204, forming two channels with the injection tube 201; the second injection side hole 2043 is arranged at the side of the injection head 204, forming three channels with the injection tube 201; the first injection side hole 2042 and the second injection side hole 2043 are located in the same plane.

[0064] In order to further achieve the effect of pushing bone cement into the patient's target position, i.e., the intervertebral space to be treated, and to connect the injection straight hole 2041 of the injection tube 201, in Example 1 of the present invention, the injection outer shell 40 also includes an outer tube straight hole 404, which is arranged at one end of the outer tube 401 away from the holding handle 402, and the outer tube straight hole 404 is connected to a channel.

[0065] See also Figure 3-4 In order to further achieve the bone cement filling effect on the embedded sac 50, the embedded sac 50 is connected to the injection tube 204 loaded with bone cement. In Example 1 of the present invention, the outer tube side hole 403 includes a first outer tube side hole 4031 and a second outer tube side hole 4032, wherein the first outer tube side hole 4031 is connected to two channels or three channels, and the second outer tube side hole 4032 is connected to three channels or two channels.

[0066] In order to further match the embedded capsule 50 with the outer cylinder 401, to play a limiting and supporting role for the embedded capsule 50 when inside the outer cylinder 401, and further limit the rotation of the injection tube 201 in the outer cylinder 401 to the axis of the outer cylinder 401, thereby improving the stability of the device, in Example 1 of the present invention, the injection part 20 also includes a limiting positioning device 205, wherein the limiting positioning device 205 is connected to the outside of the injection tube 201, and is used to make the injection tube 201 relatively fixed in the outer cylinder 401 at the target position, i.e., the axis of the outer cylinder 401.

[0067] On the one hand, in order to facilitate the patient to absorb the implanted fusion material, and on the other hand, in order to meet the needs of shaping and filling, in Example 1 of the present invention, the material of the embedded capsule 50 is a medical biological material, which is used to fill with specific injection materials (preferably bone cement here) and expand and fix at the target position, that is, the vertebral space to be treated.

[0068] In order to ensure that the injection tube 201 can be detached from the outer cylinder 401 and to allow the injection tube 201 to stably rotate inside the outer cylinder 401, in Example 1 of the present invention, the injection tube connecting buckle 301 and the outer cylinder connecting buckle 302 are connected by threads.

[0069] In order to meet the depth requirements of different implant surgeries, in Example 1 of the present invention, the lengths of the injection tube 201 and the outer tube 401 are 10 mm to 30 mm.

[0070] In order to increase the friction coefficient of the outer surface of the connecting portion 30 and further facilitate medical personnel to disassemble the injection tube 201 from the outer tube 401 , in Example 1 of the present invention, the outer surface of the connecting portion 30 is further provided with anti-slip grooves 303 .

[0071] In order to facilitate observation of the bone cement injection volume and the remaining volume, in Example 1 of the present invention, the injection tube 201 and the outer tube 401 are both made of medical transparent materials, and preferably, scale lines can be set on the outer walls of the injection tube 201 and the outer tube 401.

[0072] The working principle of the present invention is: the operator will Figure 3-4The device of the present invention is taken out of the state, and the injection tube connecting buckle 301 is screwed out from the outer tube connecting buckle 302 by holding the gripping handle 402 and the anti-slip groove 303, so that the injection part 20 is separated from the injection outer shell 40. Subsequently, the operator inserts the injection head 204 into the bone cement barrel, holds the top of the injection tube handle 203 with one hand and fixes it, and holds the piston handle 102 with the other hand and pulls it out in the direction away from the injection tube 201, so that the bone cement is filled into the gap between the injection tube 201 and the piston rod 101. Thereafter, the injection tube 201 is inserted into the outer tube 401, and the injection tube connecting buckle 301 is screwed into the outer tube connecting buckle 302, so that the injection part 20 is connected to the injection outer shell 40, and the injection straight hole 2041, the injection tube 201 and the outer tube straight hole 404 are formed into a channel through the limit positioning device 205, and the first injection side hole 2042, the injection tube 201 and the first outer tube side hole 4031 are formed into two channels. The injection side hole 2043 forms three channels with the injection tube 201 and the second outer tube side hole 4032. Then, the operator places the injection straight hole 2041 in the vertebral space to be treated. After confirming the implementation position, the operator applies pressure to the bottom end of the injection tube handle 203 and applies pressure to the piston handle 102 to drive the piston rod 101 to move toward the injection head 204. The bone cement in the injection tube 201 will be injected into the two embedded capsules 50 through the second channel and the third channel for shaping. The bone cement is output through the first channel to fill the filling gap of the shaping capsule 50. When the embedded capsule 50 is fully expanded, it means that the filling is completed, and wait for the bone cement to be shaped. After the bone cement is shaped, the injection tube connecting buckle 301 is rotated to drive the injection tube 201 to rotate in the outer tube 401, so that the second and third channels are closed and the embedded capsule 50 is separated from the outer tube side hole 403 due to rotation. The detached embedded capsule 50 can play a role in intervertebral fusion.

[0073] Example 2

[0074] By providing the injection straight hole 2041 extending out of the outer tube 401 , the intervertebral body space to be treated filled with the embedded capsule 50 can be further filled with the implant, thereby avoiding insufficient material due to uneven filling of the embedded capsule 50 .

[0075] In Example 2 of the present invention, based on Example 1, a portion of the injection head 204 is configured to extend out of the outer tube 401, the extended portion being an end away from the syringe handle 203, the extended end being provided with an injection straight hole 2041, and the injection straight hole 2041 is connected to a channel with the outer tube straight hole 404. After the capsule 50 is separated and embedded, secondary filling of bone cement can be achieved, further improving the implant filling effect of the device of the present invention.

[0076] In a further embodiment, a bone-graftable fully endoscopic fusion device may also be designed with a camera structure to cooperate with the device, thereby effectively achieving accurate positioning when the device is used.

[0077] The above describes in detail the preferred implementation of this patent, but this patent is not limited to the above implementation. Various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of this patent.

Claims

1. A bone-grafting fully endoscopic fusion device, characterized in that: It comprises a push injection part (10), an injection part (20) and an injection outer shell (40) which are sleeved in sequence from the inside to the outside; the injection part (20) and the injection outer shell (40) are detachably connected via a connecting part (30); It also includes a shrinkable embedding capsule (50) detachably connected to the injection shell (40); The injection part (20) comprises a first injection part and a second injection part which are used in conjunction with the injection outer shell (40) in sequence, wherein the top side of the first injection part is provided with an opening which is coordinated with the filling port of the embedded capsule (50); the top end of the second injection part is an open structure; the injection outer shell (40) is provided with a side opening and a top end opening which are respectively coordinated with the first injection part and the second injection part.

2. The bone-graftable fully endoscopic fusion device according to claim 1, characterized in that: The push injection unit (10) comprises a piston rod (101) and a piston handle (102) connected to one end of the piston rod (101).

3. The bone-graftable fully endoscopic fusion device according to claim 2, characterized in that: The injection part (20) comprises an injection tube (201), an injection tube sheath (202), an injection tube handle (203) and an injection head (204); the piston rod (101) can be movably inserted into the injection tube (201); the injection tube sheath (202) is sleeved on the outer side of one end of the injection tube (201); the injection head (204) is connected to the end of the injection tube (201) away from the injection tube sheath (202); and the injection tube handle (203) is connected to the outer side of one end of the injection tube sheath (202).

4. The bone-graftable fully endoscopic fusion device according to claim 3, characterized in that: The injection head (204) includes an injection straight hole (2041), a first injection side hole (2042) and a second injection side hole (2043), wherein the injection straight hole (2041) is arranged at the end of the injection head (204) away from the injection tube (201) to form a channel with the injection tube (201); the first injection side hole (2042) is arranged on the side of the injection head (204) to form two channels with the injection tube (201); the second injection side hole (2043) is arranged on the side of the injection head (204) to form three channels with the injection tube (201); the first injection side hole (2042) and the second injection side hole (2043) are located in the same plane.

5. The bone-graftable fully endoscopic fusion device according to claim 3, characterized in that: The connecting portion (30) comprises a syringe connecting buckle (301) and an outer tube connecting buckle (302), wherein the syringe connecting buckle (301) and the outer tube connecting buckle (302) are detachably connected, and the syringe connecting buckle (301) is connected to the outer side of one end of the syringe sheath (202) away from the syringe handle (203).

6. The bone-graftable fully endoscopic fusion device according to claim 1, characterized in that: The injection outer shell (40) includes an outer tube (401), a gripping handle (402) and an outer tube side hole (403), wherein the gripping handle (402) is connected to the outer side of one end of the outer tube (401), and the outer tube side hole (403) is arranged on the outer side of the other end of the outer tube (401) to cooperate with the filling port of the embedded capsule (50), and the injection tube (201) can be movably inserted into the outer tube (401), and the outer tube connecting buckle (302) is connected to the outer side of the outer tube (401) near one end of the gripping handle (402).

7. The bone-graftable fully endoscopic fusion device according to claim 1, characterized in that: The injection outer shell (40) further comprises an outer cylinder straight hole (404) which is arranged at one end of the outer cylinder (401) away from the gripping handle (402), and the outer cylinder straight hole (404) is connected to a channel.

8. The bone-graftable fully endoscopic fusion device according to claim 6, characterized in that: The outer cylinder side hole (403) includes a first outer cylinder side hole (4031) and a second outer cylinder side hole (4032), wherein the first outer cylinder side hole (4031) is connected to two channels or three channels, and the second outer cylinder side hole (4032) is connected to three channels or two channels.

9. The bone-graftable fully endoscopic fusion device according to claim 1, characterized in that: The injection part (20) further comprises a position limiting and positioning device (205), wherein the position limiting and positioning device (205) is connected to the outside of the injection tube (201) and is used to fix the injection tube (201) at a target position in the outer tube (401).

10. A method for using the bone-graftable fully endoscopic fusion device according to any one of claims 1 to 9, characterized in that the steps include: (1) The first injection part and the injection outer shell (40) are matched and sleeved together, and the top end of the injection outer shell (40), i.e., the embedding capsule (50), is inserted into the site to be acted on; (2) filling the first injection part with bone cement material, and using the push injection part (10) to push the bone cement into the embedding capsule (50) so that the embedding capsule (50) expands; (3) The second injection part and the injection outer shell (40) are matched and sleeved together, bone cement material is filled into the second injection part, and the bone cement is pushed and transported to the middle area of ​​the two side capsules of the expanded embedding capsule (50) by using the push injection part (10); after the bone cement is formed, the injection outer shell (40) and the embedding capsule (50) are separated.

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