Total endoscopic fusion cage device for bone grafting

Abstract

The utility model 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 in a sleeved mode from inside to outside. 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 embedded capsule structure, the embedded capsule structure can be unfolded through implantation of pushing and injecting bone cement, the bone cement is matched with the embedded capsule to be implanted into gaps of vertebral bodies, accurate control over implementation positions and angles is achieved, and the technical requirement for uniform distribution of bone grafting materials is met.

Description

Technical Field

[0001] This utility model relates to the field of spinal surgery instruments, specifically a bone grafting endoscopic fusion device. Background Technology

[0002] In the field of spinal surgery, especially in the treatment of spinal fusion, traditional surgical methods often suffer from problems such as large surgical trauma, long recovery periods, and high risk of complications. With the continuous advancement of medical technology, minimally invasive spinal fusion device implantation has gradually become an important approach to solving these problems. It promotes fusion between vertebrae and is designed to provide stable support and biocompatibility between the patient's vertebrae, reducing the possibility of complications caused by surgical trauma, helping to protect the implantation area and promote bone healing. Minimally invasive spinal fusion surgery is often accompanied by bone grafting, which involves placing autologous or allogeneic bone materials into the intervertebral space.

[0003] However, existing minimally invasive spinal fusion devices still have many shortcomings in terms of structural design, operational flexibility, and surgical precision, making it difficult to meet the clinical demand for efficient, safe, and precise minimally invasive surgical procedures. Specifically, traditional fusion devices often struggle to achieve precise control over the placement and angle during bone grafting, leading to uneven distribution of bone graft material and affecting fusion outcomes. Simultaneously, the fusion device lacks stability during surgery and is prone to displacement due to improper operation, increasing the risk and difficulty of the procedure. Furthermore, existing fusion devices are often structurally complex, hindering rapid assembly and disassembly during surgery and impacting surgical efficiency.

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

[0005] In order to solve, or at least solve, the problems mentioned in the background art, the present invention provides a bone grafting endoscopic fusion device.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A bone grafting endoscopic fusion device includes a push-in section, an injection section, and an injection shell that are sequentially nested from the inside out; the injection section and the injection shell are detachably connected by a connecting section.

[0008] It also includes a retractable embedding capsule that can be detachably connected to the injection shell;

[0009] The injection unit includes a first injection unit and a second injection unit that are used in sequence with the injection shell. The first injection unit has an opening on its top side that mates with the filling port of the embedded capsule. The second injection unit has an open structure at its top. The injection shell has a side opening and a top opening that mate with the first injection unit and the second injection unit, respectively.

[0010] As a further embodiment of this utility model, the injection part includes a piston rod and a piston handle connected to one end of the piston rod.

[0011] As a further embodiment of this utility model, the injection unit includes an injection tube, an injection tube sheath, an injection tube handle, and an injection head. The piston rod is movably inserted into the inside of 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. The injection tube handle is connected to the outer side of one end of the injection tube sheath.

[0012] As a further embodiment of this utility model, the injection head includes an injection straight hole, a first injection side hole, and a second injection side hole. The injection straight hole is located at the end of the injection head away from the injection tube connection, forming a channel with the injection tube. The first injection side hole is located on the side of the injection head, forming two channels with the injection tube. The second injection side hole is located 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 embodiment of this utility model, the connecting part includes an injection tube connecting buckle and an outer cylinder connecting buckle, wherein the injection tube connecting buckle and the outer cylinder connecting buckle are detachably connected, and the injection tube connecting buckle is connected to the outer side of the injection tube sheath away from the injection tube handle.

[0014] As a further embodiment of this utility model, the injection shell includes an outer cylinder, a grip handle, and an outer cylinder side hole. The grip handle is connected to the outer side of one end of the outer cylinder, and the outer cylinder side hole is located on the outer side of the other end of the outer cylinder to cooperate with the filling port of the embedded capsule. The injection tube is movably inserted into the inside of the outer cylinder, and the outer cylinder connecting buckle is connected to the outer side of the outer cylinder near the grip handle.

[0015] As a further embodiment of this utility model, the injection shell also includes an outer cylinder straight hole, which is disposed at the end of the outer cylinder away from the grip handle, and the outer cylinder straight hole is connected to a channel.

[0016] As a further embodiment of this utility model, 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 a two-channel or a three-channel, and the second outer cylinder side hole is connected to a three-channel or a two-channel.

[0017] As a further embodiment of this utility model, the injection unit further includes a limiting and positioning device, wherein the limiting and positioning device is connected to the outside of the injection tube and is used to fix the injection tube in the target position in the outer cylinder.

[0018] As a further embodiment of this invention, the material of the embedded capsule is a medical biological material, used to fill a specific injectable material and expand and fix it at the target location.

[0019] As a further embodiment of this utility model, the injection tube connecting buckle and the outer cylinder connecting buckle are connected by threads.

[0020] As a further embodiment of this utility model, the length of the injection tube and the outer cylinder is 10mm to 30mm.

[0021] As a further embodiment of this utility model, the outer surface of the connecting part is also provided with anti-slip texture.

[0022] As a further embodiment of this invention, both the injection tube and the outer cylinder are made of medical-grade transparent material.

[0023] On the other hand, this utility model also provides a method for using a bone grafting endoscopic fusion device, the steps of which include:

[0024] (1) Fit the first injection part and the injection shell together, and insert the top of the injection shell, i.e. the embedded capsule, into the site to be acted upon;

[0025] (2) Fill the first injection section with bone cement material, and use the injection section to push and deliver the bone cement into the embedded capsule to expand the embedded capsule.

[0026] (3) The second injection part and the injection shell are fitted together, bone cement material is filled into the second injection part, and the bone cement is pushed and delivered to the middle area of ​​the two sides of the expanded embedded capsule by the injection part; after the bone cement is formed, the injection shell and the embedded capsule are separated.

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

[0028] This invention provides a fully endoscopic fusion device for bone grafting, which enables the unfolding of the embedded capsule structure through the injection of bone cement. Compared with the traditional endoscopic fusion device implantation method, it is simpler, with a clever and reasonable structural design and arrangement, which helps to improve the usage rate and success rate of the device. The fusion device of this system uses bone cement, an implantation material with good biocompatibility, high plasticity and high strength, which can be implanted in various intervertebral spaces in conjunction with the embedded capsule, achieving precise control of the implementation position and angle, and meeting the technical requirement of uniform distribution of bone graft material.

[0029] This invention further incorporates an outer cylinder structure on the basis of the injection tube, and by setting a limiting and positioning device, the injection tube of this invention can be accurately positioned to the implementation area, which facilitates the effective deployment and limited injection of the qualitative cyst. This solves the problem of insufficient positioning stability and accuracy of the fusion device in the prior art, and effectively meets the actual clinical needs for effective cooperation between the fusion device and the existing spinal endoscope.

[0030] This invention further incorporates a connecting part on the basis of the injection tube and outer cylinder. By providing a detachable threaded connection, the injection tube, outer cylinder, and injection part of this invention can be detached and separated from each other, which can effectively store and assemble this invention. In addition, this invention also realizes the switching between two technical solutions: embedded cyst filling and secondary injection, and can achieve effective positioning of the secondary injection, avoiding the problem of the cyst slipping out of the intervertebral space and filling gaps, thus further improving the filling effect. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of a bone grafting fusion device provided in Embodiment 1 of this utility model.

[0032] Figure 2 This is a front view of a bone grafting fusion device provided in Embodiment 1 of this utility model.

[0033] Figure 3 This is a schematic diagram of the unfilled structure of a bone grafting endoscopic fusion device provided in Embodiment 1 of this utility model.

[0034] Figure 4 This is a front view of an endoscopic bone grafting fusion device in its unfilled state, as provided in Embodiment 1 of this utility model.

[0035] Figure 5 This is a schematic diagram of a bone grafting fusion device provided in Embodiment 2 of this utility model.

[0036] Figure 6 This is a front view of a bone grafting fusion device provided in Embodiment 2 of this utility model.

[0037] Figure 7 This is a schematic diagram of the injection section of a bone grafting fusion device provided by this utility model.

[0038] In the diagram: 10. Injection section;

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

[0040] 20. Injection section;

[0041] 201. Injection tube; 202. Injection tube sheath; 203. Injection tube handle; 204. Injection head; 205. Limiting and 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 connector; 302. Outer tube connector; 303. Anti-slip texture;

[0045] 40. Inject the outer 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 the capsule. Detailed Implementation

[0049] The technical solution of this patent will be further described in detail below with reference to specific implementation methods.

[0050] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0051] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; furthermore, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "joined" should be interpreted broadly, 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 an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0052] Example 1

[0053] The applicant has found that existing minimally invasive spinal fusion devices still have many shortcomings in terms of structural design, operational flexibility, and surgical precision, making it difficult to meet the clinical demand for efficient, safe, and precise minimally invasive surgical procedures. Specifically, traditional fusion devices often struggle to achieve precise control over the placement and angle during bone grafting, leading to uneven distribution of bone graft material and affecting fusion outcomes. Furthermore, the fusion device lacks stability during surgery and is prone to displacement due to improper operation, increasing the risk and difficulty of the procedure. In addition, existing fusion devices are often structurally complex, hindering rapid assembly and disassembly during surgery and impacting surgical efficiency.

[0054] In view of this,

[0055] This embodiment provides a bone grafting endoscopic fusion device, which includes a push-in part 10, an injection part 20 and an injection shell 40 that are sequentially sleeved from the inside to the outside; the injection part 20 and the injection shell 40 are detachably connected by a connecting part 30.

[0056] It also includes a retractable embedding capsule 50 that is detachably connected to the injection shell 40;

[0057] The injection unit 20 includes a first injection unit and a second injection unit that are used in sequence with the injection shell 40. The first injection unit has an opening on its top side that mates with the filling port of the embedded capsule 50. The second injection unit has an open structure at its top. The injection shell 40 has a side opening and a top opening that mate with the first injection unit and the second injection unit, respectively.

[0058] The specific usage of this endoscopic bone grafting fusion device includes:

[0059] 1. Fit the first injection part and the injection shell 40 together, and insert the top of the injection shell 40, i.e. the embedded capsule 50, into the site to be acted upon.

[0060] 2. Fill the first injection section with bone cement material, and use the injection section 10 to push and deliver the bone cement into the embedded capsule 50, causing the embedded capsule 50 to expand.

[0061] 3. The second injection section and the injection shell 40 are fitted together, and bone cement material is filled into the second injection section. The bone cement is pushed and delivered to the middle area of ​​the two sacs of the expanded embedded sac 50 using the injection section 10. After the bone cement is formed, the injection shell 40 and the embedded sac 50 are separated.

[0062] In a further embodiment, please refer to Figure 1-2 , Figure 1 This is a structural diagram of a bone grafting fusion device provided in Embodiment 1 of this utility model. Figure 2 This is a front view of a bone grafting endoscopic fusion device provided in Embodiment 1 of this utility model. This utility model provides a bone grafting endoscopic fusion device, comprising: a push-in section 10, which includes a piston rod 101 and a piston handle 102 connected to one end of the piston rod 101; an injection section 20, which includes an injection tube 201, an injection tube sheath 202, an injection tube handle 203, and an injection head 204. The piston rod 101 is 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; and a connecting section 30, which includes an injection tube connecting buckle 301 and an outer cylinder connecting buckle 302, wherein the injection tube connecting buckle... The injection tube 301 is detachably connected to the outer cylinder connecting buckle 302. 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 includes an outer cylinder 401, a grip handle 402, and an outer cylinder side hole 403. The grip handle 402 is connected to the outer side of one end of the outer cylinder 401, and the outer cylinder side hole 403 is located on the outer side of the other end of the outer cylinder 401. The injection tube 201 is movably inserted into the outer cylinder 401, and the outer cylinder connecting buckle 302 is connected to the outer side of the outer cylinder 401 near the grip handle 402. The embedded cyst 50 is detachably connected to the outer cylinder side hole 403 and is used to restrict the embedded cyst 50 to the target position for intervertebral fusion when the embedded cyst 50 is filled and expanded. This invention enables the unfolding of the embedded capsule 50 structure through the injection of bone cement. Compared with the traditional endoscopic fusion device implantation method, it is simpler, with a clever and reasonable structural design and arrangement, which helps to improve the popularity and success rate of the device. The fusion device of this system uses bone cement, an implantation material with good biocompatibility, high plasticity and high strength, which can be used in conjunction with the embedded capsule 50 to be implanted in the intervertebral space, achieving precise control of the implementation position and angle, and meeting the technical requirement of uniform distribution of bone graft material.

[0063] Please see Figure 7 , Figure 7This is a schematic diagram of the injection section structure of a bone grafting fusion device provided by this utility model. To achieve the desired bone cement injection effect at the patient's target location, i.e., the intervertebral space to be treated and the embedded cyst 50, and to facilitate the output of the bone cement via injection 10, in embodiment 1 of this utility model, the injection head 204 is a bottomless hollow frustum structure, including an injection straight hole 2041, a first injection side hole 2042, and a second injection side hole 2043. The injection straight hole 2041 is located 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 located on the side of the injection head 204, forming two channels with the injection tube 201; the second injection side hole 2043 is located on 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 injecting bone cement into the target location of the patient, namely the intervertebral space to be treated, and to connect the injection straight hole 2041 of the injection tube 201, in Embodiment 1 of this utility model, the injection outer shell 40 also includes an outer cylinder straight hole 404, which is disposed at the end of the outer cylinder 401 away from the handle 402, and the outer cylinder straight hole 404 is connected to a channel.

[0065] Please see Figure 3-4 In order to further achieve the bone cement filling effect of the embedded capsule 50, and to connect the embedded capsule 50 to the injection tube 204 containing bone cement, in embodiment 1 of this utility model, 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 a two-channel or a three-channel, and the second outer cylinder side hole 4032 is connected to a three-channel or a two-channel.

[0066] In order to further cooperate the embedded capsule 50 with the outer cylinder 401, and to limit and support the embedded capsule 50 when it is inside the outer cylinder 401, thereby restricting the rotation of the injection tube 201 in the outer cylinder 401 to the axis of the outer cylinder 401 and improving the stability of the device, in embodiment 1 of this utility model, the injection part 20 further includes a limiting and positioning device 205, wherein the limiting and positioning device 205 is connected to the outside of the injection tube 201 and is used to fix the injection tube 201 relatively at the target position, i.e., the axis of the outer cylinder 401, in the outer cylinder 401.

[0067] On the one hand, in order to facilitate the absorption of the implanted fusion device material by the patient, and on the other hand, in order to meet the needs of shaping and filling, in Embodiment 1 of this utility model, the material of the embedded capsule 50 is a medical biological material, which is used to fill a specific injectable material (preferably bone cement) and expand and fix it at the target position, i.e., the intervertebral 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 rotate stably inside the outer cylinder 401, in embodiment 1 of this utility model, 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 Embodiment 1 of this utility model, the length of the injection tube 201 and the outer cylinder 401 is 10mm to 30mm.

[0070] In order to increase the friction coefficient of the outer surface of the connecting part 30 and further facilitate medical staff to disassemble the injection tube 201 to the outer cylinder 401, in embodiment 1 of this utility model, the outer surface of the connecting part 30 is also provided with anti-slip texture 303.

[0071] To facilitate observation of the amount and remaining amount of bone cement injected, in Embodiment 1 of this utility model, both the injection tube 201 and the outer cylinder 401 are made of medical transparent material. Preferably, scale lines can be provided on the outer wall of the injection tube 201 and the outer cylinder 401.

[0072] The working principle of this utility model is: the practitioner will perform as follows: Figure 3-4The device is removed from its original state. Holding the handle 402 and the anti-slip texture 303, the injection tube connector 301 is unscrewed from the outer tube connector 302, separating the injection part 20 from the injection shell 40. The operator then inserts the injection head 204 into the bone cement cylinder, holding and securing the top of the injection tube handle 203 with one hand, and pulling the piston handle 102 away from the injection tube 201 with the other hand, filling the gap between the injection tube 201 and the piston rod 101 with bone cement. The injection tube 201 is then inserted into the outer cylinder 401, and the injection tube connector 301 is screwed into the outer tube connector 302, connecting the injection part 20 to the injection shell 40. The limiting and positioning device 205 creates a channel between the injection straight hole 2041, the injection tube 201, and the outer cylinder straight hole 404, and creates two channels between the first injection side hole 2042, the injection tube 201, and the first outer cylinder side hole 4031, allowing the injection head 204 to fill the gap between the injection tube 201 and the piston rod 101. The second injection side hole 2043, injection tube 201, and second outer cylinder side hole 4032 form a three-channel system. Then, the operator places the injection straight hole 2041 into the intervertebral space to be treated. After confirming the 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 closer to the injection head 204. The bone cement in the injection tube 201 will be injected and shaped into the two embedded cysts 50 through the second and third channels. The bone cement is output through the first channel to fill the filling gap of the shaped cyst 50. When the embedded cyst 50 is fully expanded, the filling is complete. Wait for the bone cement to set. After the bone cement sets, rotate the injection tube connecting buckle 301 to make the injection tube 201 rotate in the outer cylinder 401, so that the second and third channels are closed and the embedded cyst 50 is disengaged from the outer cylinder side hole 403 due to rotation. The disengaged embedded cyst 50 can play the role of intervertebral fusion.

[0073] Example 2

[0074] By setting an injection hole 2041 extending out of the outer cylinder 401, further implant filling can be performed on the intervertebral space to be treated by filling the embedded capsule 50, avoiding insufficient material due to uneven filling of the embedded capsule 50.

[0075] In Embodiment 2 of this invention, based on Embodiment 1, a portion of the injection head 204 extends out of the outer cylinder 401, with the extended portion being the end furthest from the injection tube handle 203. This extended end is provided with an injection straight hole 2041, which communicates with the outer cylinder straight hole 404 through a channel. This allows for secondary filling with bone cement after the implanted capsule 50 is separated, further improving the implant filling effect of this invention.

[0076] In a further embodiment, a bone grafting endoscopic fusion device can also be designed with a camera structure to work in conjunction with it, which can effectively achieve accurate positioning when the device is in use.

[0077] The preferred embodiments of this patent have been described in detail above. However, this patent is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this patent.

Claims

1. A bone grafting endoscopic fusion device, characterized in that, It includes a push-in part (10), an injection part (20), and an injection shell (40) that are sequentially nested from the inside out; the injection part (20) and the injection shell (40) are detachably connected by a connecting part (30); It also includes a retractable embedded capsule (50) that is detachably connected to the injection shell (40); The injection section (20) includes a first injection section and a second injection section that are used in sequence with the injection shell (40). The first injection section has an opening on its top side that is used in conjunction with the filling port of the embedded capsule (50). The top of the second injection section is an open structure. The injection shell (40) has a side opening and a top opening that are used in conjunction with the first injection section and the second injection section, respectively.

2. The total endoscopic fusion cage device of claim 1, wherein, The injection unit (10) includes a piston rod (101) and a piston handle (102) connected to one end of the piston rod (101).

3. The total endoscopic fusion cage device of claim 2, wherein, The injection unit (20) includes an injection tube (201), an injection tube sheath (202), an injection tube handle (203), and an injection head (204). The piston rod (101) is 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). The injection tube handle (203) is connected to the outer side of one end of the injection tube sheath (202).

4. The total endoscopic fusion cage device of claim 3, wherein, The injection head (204) includes an injection straight hole (2041), a first injection side hole (2042), and a second injection side hole (2043). The injection straight hole (2041) is located at the end of the injection head (204) that is connected away from the injection tube (201) and forms a channel with the injection tube (201). The first injection side hole (2042) is located on the side of the injection head (204) and forms two channels with the injection tube (201). The second injection side hole (2043) is located on the side of the injection head (204) and forms 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 total endoscopic fusion cage device of claim 3, wherein, The connecting part (30) includes an injection tube connecting buckle (301) and an outer cylinder connecting buckle (302), wherein the injection tube connecting buckle (301) and the outer cylinder connecting buckle (302) are detachably connected, 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).

6. The total endoscopic fusion cage device of claim 5, wherein, The injection shell (40) includes an outer cylinder (401), a grip handle (402), and an outer cylinder side hole (403). The grip handle (402) is connected to the outer side of one end of the outer cylinder (401), and the outer cylinder side hole (403) is located on the outer side of the other end of the outer cylinder (401) and cooperates with the filling port of the embedded capsule (50). The injection tube (201) is movably inserted into the inside of the outer cylinder (401), and the outer cylinder connecting buckle (302) is connected to the outer side of the outer cylinder (401) near the grip handle (402).

7. The total endoscopic fusion cage device of claim 1, wherein, The injection housing (40) also includes an outer cylinder straight hole (404), which is located at the end of the outer cylinder (401) away from the grip handle (402), and the outer cylinder straight hole (404) is connected to a channel.

8. The bone grafting 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 a two-channel or a three-channel, and the second outer cylinder side hole (4032) is connected to a three-channel or a two-channel.

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

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