Split fusion cage compatible with direct decompression and end plate conformal bone grafting of anterior spinal flexible robot

Abstract

The invention discloses a split fusion cage compatible with direct decompression and end plate conformal bone grafting of an anterior spinal flexible robot. The split fusion cage comprises a first main body section, a second main body section and a third main body section, the first main body section is L-shaped and comprises a longitudinal supporting part and a transverse supporting part, and a first connecting part is arranged at the end, away from the longitudinal supporting part, of the transverse supporting part; the first main body section is provided with an inlet side parallel to the transverse supporting part and an outlet side parallel to the longitudinal supporting part, and the first main body section is used for enabling the flexible mechanical arm to enter and penetrate out of a spinal canal to extend into the spinal canal for direct pressure reduction operation; the second main body section is detachably connected to the first connecting part, and a U-shaped structure with a bone grafting cavity is defined by the second main body section and the first main body section; the third main body section is of a plate-shaped structure, and an O-shaped structure is defined by the third main body section, the second main body section and the first main body section. A split structure is adopted, an access channel and an operation space are provided for the flexible mechanical arm, direct pressure reduction operation is facilitated, in-vivo bone grafting can be carried out, and the adaptation of a bone grafting object and an end plate in shape is increased.

Description

A split fusion device compatible with anterior spinal flexible robot direct decompression and endplate conformal bone grafting Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a split fusion device that is compatible with anterior spinal cord flexible robot direct decompression and endplate conformal bone grafting. Background Technology

[0002] In clinical spinal surgery, vertebral fusion is one of the core methods for restoring spinal stability and relieving pain. As a key device in vertebral fusion surgery, the vertebral fusion device must have core functions such as supporting the vertebrae, maintaining the height of the intervertebral space, and providing a bony fusion environment.

[0003] Existing vertebral fusion procedures, such as the common anterior lumbar interbody fusion (ALIF) and oblique lateral interbody fusion (OLIF), all employ indirect decompression mechanisms. Their core principle is to use a large-sized fusion cage to open and restore the height of the intervertebral space, thereby repositioning the compressed intervertebral disc tissue. This indirectly increases the volume of the spinal canal and intervertebral foramen, relieving pressure on the nerve roots and dura mater, rather than directly removing the compressive material.

[0004] Most existing fusion cages are one-piece structures. Since spinal lesions are often accompanied by degeneration, herniation, or calcification of intervertebral discs, especially in the posterior vertebrae, residual or diseased disc tissue can compress the spinal cord and nerve roots, causing neurological symptoms. Existing fusion cages, after implantation, block the entire intervertebral space, failing to provide the operational space for treating residual intervertebral disc tissue in the posterior vertebrae and hindering direct decompression (removal of the compressing material), thus affecting the surgical decompression effect. Furthermore, the use of tools such as nucleus pulposus forceps and curettes to grind the endplate before fusion cage implantation can lead to mismatches between the ground area and the opening of the fusion cage's bone graft cavity, as well as over- or under-grinding. The bone graft needs to be filled into the fusion cage before implantation, and the graft cannot extend beyond the upper and lower surfaces of the fusion cage. Because the endplate is concave and curved, gaps exist between the graft and the endplate after fusion cage implantation, which is detrimental to fusion. Summary of the Invention

[0005] To address the shortcomings of the existing technology, this invention provides a split fusion device that is compatible with direct decompression by a flexible robot for anterior spinal surgery and conformal bone grafting to the endplate. Through a split structural design combined with a step-by-step operation process, it facilitates direct decompression of the compression material in the spinal canal and uniform, conformal bone grafting.

[0006] To achieve the above technical objectives, the technical solution adopted by this invention is: a split fusion device compatible with direct decompression and endplate conformal bone grafting using a flexible robot for anterior spinal surgery, comprising a first main body segment, a second main body segment, and a third main body segment; the first main body segment is L-shaped, including a longitudinal support portion and a transverse support portion, with a first connecting portion at the end of the transverse support portion away from the longitudinal support portion; the upper and lower end faces of the first main body segment respectively contact the epiphyseal ring lateral and anterior sides of the upper and lower vertebral bodies; the first main body segment has an inlet side and an outlet side, the inlet side being parallel to the transverse support portion, and the outlet side being parallel to the longitudinal support portion and facing posteriorly towards the spinal canal, the inlet side being used for allowing a flexible robotic arm to enter and extend into the spinal canal from the outlet side to perform direct decompression operations; one end of the second main body segment can... The first connecting part connected to the transverse support is disassembled. The upper and lower end faces of the second main body segment contact the posterior epiphyseal rings of the upper and lower vertebral bodies, respectively, and close the outlet side of the first main body segment. The second main body segment and the first main body segment together form a "U"-shaped structure with a bone graft cavity. The upper and lower sides of the "U"-shaped bone graft cavity face the pre-treated endplate and are used to fill the bone graft and create conformal implantation conditions for the bone graft to conform to the shape of the endplate. The third main body segment is a plate-like structure. The upper and lower end faces of the third main body segment contact the lateral epiphyseal rings of the upper and lower vertebral bodies, respectively. It is connected to the longitudinal support part of the first main body segment and the end of the second main body segment away from the transverse support part by a detachable connection. Together with the second main body segment and the first main body segment, they form an "O"-shaped structure.

[0007] As a preferred technical solution, the first connecting part is provided with a snap-fit ​​groove, and the end of the second main body section near the transverse support part is provided with a snap-fit ​​boss that matches the snap-fit ​​groove. The second main body section and the first main body section are connected by the matching of the snap-fit ​​boss and the snap-fit ​​groove.

[0008] As a preferred technical solution, the snap-fit ​​boss and the snap-fit ​​groove are interference-fitted.

[0009] As a preferred technical solution, the bottom of the snap-fit ​​groove is provided with a threaded hole, and the second main body section is provided with a stepped connecting hole that runs through the front and back. The second main body section is connected to the first main body section by a fixing screw that passes through the stepped connecting hole and matches the threaded hole.

[0010] As a preferred technical solution, the snap-fit ​​groove is further provided with a positioning hole, and the snap-fit ​​boss end of the second main body section is provided with a positioning post, which is adapted to the positioning hole.

[0011] As a preferred technical solution, the two ends of the third main body section are provided with two connecting holes diagonally, and the longitudinal support part of the first main body section and the second main body section are provided with corresponding threaded holes. The third main body section is fixed by fixing screws that pass through the connecting holes and are adapted to the threaded holes.

[0012] As a preferred technical solution, the second main body segment is provided with a second positioning hole at the end away from the lateral support, and the third main body segment is provided with a second positioning post at the corresponding position, the second positioning post being adapted to the second positioning hole.

[0013] As a preferred technical solution, the threaded hole in the snap-fit ​​groove, the threaded hole in the longitudinal support and the threaded hole in the second main body are all fixed with guide wires, and the fixing screw is provided with a through guide hole along the central axis.

[0014] As a preferred technical solution, the inner wall of the transverse support of the first main body section and the outer wall of the third main body section are provided with tool connection holes.

[0015] As a preferred technical solution, two camera mounting holes are provided in the longitudinal support portion of the first main body section. The camera mounting holes extend from the end of the longitudinal support portion to the transverse support portion. A wedge-shaped groove is provided on the inner side of the middle of the longitudinal support portion. The camera mounting holes are connected to the wedge-shaped groove, and the inclined surface of the wedge-shaped groove is away from the camera mounting holes. A reflective lens is fixedly installed on the inclined surface of the wedge-shaped groove. The camera can be detachably installed in the camera mounting holes.

[0016] The beneficial effects of this invention are as follows: The split fusion device of this invention adopts a split design. The "L"-shaped first main body section supports the epiphyseal rings of the upper and lower vertebrae on the sides and front, effectively maintaining the height of the intervertebral space and providing a stable anatomical space for subsequent operations. The entrance and exit of the first main body section provide access channels and operating space for the flexible robotic arm, allowing direct insertion of the flexible robotic arm into the spinal canal for direct decompression. The flexible robotic arm works in concert with an endoscope, holmium laser, and nucleus pulposus forceps to remove the free prolapsed nucleus pulposus in the spinal canal and shape the facet joints, thereby achieving the purpose of direct decompression of the spinal canal. This solves the technical problem that traditional fusion devices cannot reach the spinal canal and improves the thoroughness of the removal of the compressive material.

[0017] The split fusion device of the present invention has a second main body segment connected to the first main body segment to form a "U"-shaped filling cavity. The upper and lower sides of this "U"-shaped bone graft cavity are directly opposite the pretreated endplate. The bone graft cavity not only provides space for the implantation of granular artificial bone and granular-semi-solid composite artificial bone, but also creates conformal implantation conditions that allow the bone material to closely fit the shape of the endplate. The close contact between the bone material and the endplate creates favorable conditions for good bone ingrowth. Finally, a third main body segment is used for closure to seal the bone graft within the bone graft cavity.

[0018] The split-type fusion device of the present invention has a second main body segment that is adapted to the first main body segment via a snap-fit ​​groove and a snap-fit ​​boss, and is connected by a fixing screw, resulting in a firm and reliable connection. A guide wire is provided inside the threaded hole, and a fixing screw with a guide hole is used; the guide wire guides the fixing screw into place, making operation simple and efficient.

[0019] The split fusion device of the present invention has a pre-set mounting hole for a camera in the longitudinal support part of the first main body section. During the operation, the surgical field image captured by the camera can be used to construct a three-dimensional image, enhance the field of vision, and facilitate the viewing of the position of surgical instruments and the completion of the endplate, i.e., the intervertebral disc treatment. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is an exploded view of Figure 1; Figure 3 is a cross-sectional view of the present invention; Figure 4 is a schematic diagram of decompression operation using a flexible robotic arm after the first main body segment is implanted in the application; Figure 5 is a schematic diagram of implanting the second main body segment and filling it with bone graft in the application; Figure 6 is a schematic diagram of implanting the third main body segment in the application; Figure 7 is a schematic diagram of the bone graft filling effect.

[0022] Reference numerals: 1-First main body section, 11-Longitudinal support, 12-Transverse support, 13-First connecting part, 14-Snap-fit ​​groove, 101-Inlet side, 102-Outlet side, 2-Second main body section, 21-Snap-fit ​​boss, 22-Step connecting hole, 3-Third main body section, 31-Connecting hole, 4-Flexible robotic arm, 5-Bone graft cavity, 6-Fixing screw, 7-Guide wire, 8-Camera 8, 9-Reflective lens, 10-Bone graft, 15-Threaded hole, 16-Camera mounting hole, 17-Wedge groove, 18-Tool connecting hole. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0024] A split-body fusion device compatible with anterior spinal cord fusion using a flexible robot for direct decompression and endplate conformal bone grafting, as shown in Figures 1-3, includes a first main body segment 1, a second main body segment 2, and a third main body segment 3. The first main body segment 1 is L-shaped and includes a longitudinal support portion 11 and a transverse support portion 12. The end of the transverse support portion 12 away from the longitudinal support portion 11 is provided with a first connecting portion 13. The upper and lower end faces of the first main body segment 1 respectively contact the epiphyseal ring lateral and anterior sides of the upper and lower vertebral bodies. The first main body segment 1 has an inlet side 101 and an outlet side 102. The inlet side 101 is parallel to the transverse support portion 12, and the outlet side 102 is parallel to the longitudinal support portion 11 and faces posteriorly toward the spinal canal. The inlet side 101 is used to allow a flexible robotic arm 4 to enter and extend from the outlet side 102. The flexible robotic arm 4, equipped with an endoscope and processing tools (such as a holmium laser and nucleus pulposus forceps), is used to remove the prolapsed nucleus pulposus from the spinal canal and shape the facet joints, achieving direct decompression of the spinal canal. One end of the second main body segment 2 is detachably connected to the first connecting part 13 on the transverse support part 12. The upper and lower end faces of the second main body segment 2 contact the posterior epiphyseal rings of the upper and lower vertebral bodies, respectively, and close the exit side of the first main body segment 1. The second main body segment 2 and the first main body segment 1 together form a "U"-shaped structure with a bone graft cavity 5. The upper and lower sides of the "U"-shaped bone graft cavity face the pre-treated endplate and are used to fill with granular artificial bone, granular-semi-solid composite artificial bone, and other bone graft materials. This also creates conformal implantation conditions where the bone graft material closely conforms to the shape of the endplate. The close contact between the bone graft material and the endplate creates favorable conditions for good bone ingrowth.

[0025] The third main body segment 3 is a plate-like structure. The upper and lower end faces of the third main body segment 3 are in contact with the lateral epiphyseal rings of the upper and lower vertebrae, respectively. It is connected to the longitudinal support part 11 of the first main body segment 1 and the end of the second main body segment 2 away from the transverse support part 12 by a detachable connection method, sealing the opening end of the "U"-shaped structure, and together with the second main body segment 2 and the first main body segment 1, it forms an "O"-shaped structure.

[0026] Preferably, the first connecting portion 13 is provided with a snap-fit ​​groove 14, and the second main body segment 2 is provided with a snap-fit ​​boss 21 adapted to the snap-fit ​​groove 14 at one end near the transverse support portion 12. The second main body segment 2 and the first main body segment 1 are connected by the adaptation of the snap-fit ​​boss 21 and the snap-fit ​​groove 14. In one embodiment, the snap-fit ​​boss 21 and the snap-fit ​​groove 14 are interference-fitted. In another preferred embodiment, the bottom of the snap-fit ​​groove 14 is provided with a threaded hole 15, and the second main body segment 2 is provided with a stepped connecting hole 22 that runs through the front and back. The second main body segment 2 is connected to the first main body segment 1 by a fixing screw 6 that passes through the stepped connecting hole 22 and is adapted to the threaded hole 15. Preferably, the snap-fit ​​groove 14 is also provided with a positioning hole, and the end of the snap-fit ​​boss 21 of the second main body segment 2 is provided with a positioning post. The positioning post is adapted to the positioning hole to realize the positioning of the second main body segment 2. Furthermore, an annular sealing ring (not shown in the figure) is provided on the outer periphery of the root of the snap-fit ​​boss 21. The annular sealing ring abuts against the inner circumferential surface of the snap-fit ​​groove 14 to enhance the sealing performance after the second main body section 2 is connected to the first main body section 1.

[0027] The third main body segment 3 has two diagonally arranged connecting holes 31 at both ends. The longitudinal support portion 11 of the first main body segment 1 and the second main body segment 2 are respectively provided with threaded holes 15. The third main body segment 3 is fixed by fixing screws 6 that pass through the connecting holes 31 and are adapted to the threaded holes 15. Preferably, the end of the second main body segment 2 away from the transverse support portion 12 is also provided with a second positioning hole, and the third main body segment 3 is provided with a second positioning post at a corresponding position. The second positioning post is adapted to the second positioning hole and is used for positioning the third main body segment 3.

[0028] Preferably, to facilitate the accurate positioning of the fixing screw 6, a guide wire 7 is fixed at the center of the threaded hole 15 in the locking groove 14, the longitudinal support part 11 of the first main body section 1, and the threaded hole 15 on the second main body section 2. The fixing screw 6 has a through guide hole 61 along the central axis. The guide wire 7 is passed through the guide hole 61, and the fixing screw 6 is pushed along the guide wire 7 to guide it to the predetermined position. Then, the fixing screw 6 is tightened with a tool. Finally, the guide wire is cut off along the surface of the fusion device with other surgical tools.

[0029] Furthermore, the inner sidewall of the transverse support portion 12 of the first main body segment 1 and the outer sidewall of the third main body segment 3 are provided with tool connection holes 18 to facilitate the connection of implantation tools for implantation; the threaded hole 15 of the second main body segment 2 also serves as the tool connection hole 18. During implantation, the implantation tool is connected to the threaded hole 15. After implantation and fixation, the implantation tool is removed. After the third main body segment 3 is implanted, the fixing screw 6 is passed through the connection hole 31 and screwed into the threaded hole 15.

[0030] Furthermore, two camera mounting holes 16 are provided in the longitudinal support portion 11 of the first main body segment 1. The camera mounting holes 16 extend from the end of the longitudinal support portion 11 towards the transverse support portion 12. A wedge-shaped groove 17 is provided on the inner side of the middle of the longitudinal support portion 11. The camera mounting holes 16 communicate with the wedge-shaped groove 17, and the inclined surface of the wedge-shaped groove 17 is away from the camera mounting holes 16. To enhance the surgical field of vision, a camera 8 is installed in the first main body segment 1. A reflective lens 9 is fixedly installed on the inclined surface of the wedge-shaped groove 17. The camera 8 is connected to an external camera through a wire. By capturing the image in the reflective lens 9 through the camera 8, a three-dimensional image of the target area can be constructed, which is convenient for viewing the position of surgical instruments, the endplate, and the completion of intervertebral disc treatment, etc.

[0031] The implantation process of the split fusion device of the present invention is as follows: Step 1, implanting the first main body segment 1 and completing the support: In the early stage of the operation, the "L"-shaped first main body segment 1 is accurately implanted between the two vertebral bodies using an implantation tool. The upper and lower end faces of the first main body segment 1 are in contact with the epiphyseal rings of the upper and lower vertebral bodies on the side and front. The outlet side of the first main body segment 1 is directly opposite the spinal canal, thereby achieving temporary support for the vertebral bodies, effectively maintaining the height of the intervertebral space, and providing a stable anatomical space for subsequent operations.

[0032] Step 2: Flexible robotic arm 4 is inserted for decompression: After the first main body segment 1 is fixed, the flexible robotic arm 4 is inserted from the inlet side, as shown in Figure 4. The flexible robotic arm 4 can be flexibly bent and adjusted in angle, and extends from the outlet side, passing through the gap between the first main body segment 1 and the vertebral body to the spinal canal. The doctor manipulates the flexible robotic arm 4, and with the cooperation of an endoscope, holmium laser and nucleus pulposus forceps, the free prolapsed nucleus pulposus in the spinal canal is removed and the facet joint is shaped, ultimately achieving the purpose of direct decompression of the spinal canal.

[0033] Step 3: Implanting the second main body segment 2 to form the bone graft cavity 5: After the decompression operation is completed, while maintaining the support of the first main body segment 1, the second main body segment 2 is implanted and aligns with the first connecting part 13 of the first main body segment 1. This ensures that the locking protrusion 21 of the second main body segment 2 precisely engages with the locking groove 14 of the first main body segment 1. The fixing screw 6 is then passed through the stepped connecting hole 22 and connected to the threaded hole 15 within the locking groove 14. The upper and lower end faces of the second main body segment 2 contact the posterior epiphyseal rings of the upper and lower vertebral bodies, respectively, and seal the exit side of the first main body segment 1. The second main body segment 2 and the first main body segment 1 together form a complete "U"-shaped bone graft cavity 5. The sealing ring on the outer periphery of the base of the locking protrusion 21 ensures the seal after the two main body segments are connected, preventing subsequent leakage of bone graft material.

[0034] Step 4: Bone graft filling operation: The upper and lower sides of the "U"-shaped bone graft cavity 5 are pre-treated endplates. Besides providing space for the implantation of granular artificial bone and granular-semi-solid composite artificial bone, the bone graft cavity 5 also creates conformal implantation conditions that allow the bone to closely conform to the shape of the endplate. As shown in Figures 5 and 7, the cavity is gradually filled and compacted from back to front. The bone graft conforms to the endplate, ensuring sufficient bone graft volume and dense filling. Close contact between the bone material and the endplate creates favorable conditions for good bone ingrowth.

[0035] Step 5: The third main body segment 3 closes the "U"-shaped opening to complete the surgery: After the bone graft filling is completed, the third main body segment 3 is attached to the longitudinal support part 11 of the first main body segment 1 and the second main body segment 2. The lateral epiphyseal rings of the upper and lower vertebral bodies of the third main body segment are in contact, so that the connecting hole 31 is aligned with the corresponding threaded hole 15. The fixing screw 6 is passed through the connecting hole 31 and screwed into the threaded hole 15 to achieve a firm fixation of the third main body segment 3. The third main body segment 3 completely covers the "U"-shaped opening to form an "O"-shaped structure, as shown in Figure 6, to avoid the bone graft material from overflowing, while maintaining the closed environment of the bone graft cavity 5, which is conducive to bone healing.

[0036] Of course, the present invention may have other various embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and modifications according to the present invention, but these corresponding changes and modifications should all fall within the protection scope of the appended claims.

Claims

1. A split-body fusion device compatible with anterior spinal cord flexible robot direct decompression and endplate conformal bone grafting, characterized in that: The system comprises a first main body segment, a second main body segment, and a third main body segment. The first main body segment is L-shaped and includes a longitudinal support portion and a transverse support portion. A first connecting portion is provided at the end of the transverse support portion away from the longitudinal support portion. The upper and lower end faces of the first main body segment respectively contact the epiphyseal ring side and front of the upper and lower vertebral bodies. The first main body segment has an inlet side and an outlet side. The inlet side is parallel to the transverse support portion, and the outlet side is parallel to the longitudinal support portion and faces posteriorly towards the spinal canal. The inlet side is used to allow a flexible robotic arm to enter and extend into the spinal canal from the outlet side for direct decompression. One end of the second main body segment is detachably connected to the first connecting portion on the transverse support portion. The upper and lower end faces of the second main body segment... The lower end face contacts the posterior epiphyseal rings of the upper and lower vertebral bodies respectively, and closes the exit side of the first main body segment. The second main body segment and the first main body segment enclose each other to form a "U"-shaped structure with a bone graft cavity. The upper and lower sides of the "U"-shaped bone graft cavity face the pre-treated endplate, which is used to fill the bone graft and create conformal implantation conditions for the bone graft to fit the shape of the endplate. The third main body segment is a plate-like structure. The upper and lower end faces of the third main body segment contact the lateral epiphyseal rings of the upper and lower vertebral bodies respectively. It is connected to the longitudinal support part of the first main body segment and the end of the second main body segment away from the transverse support part by a detachable connection method. Together with the second main body segment and the first main body segment, they enclose each other to form an "O"-shaped structure.

2. The split-body fusion device compatible with anterior spinal flexible robot direct decompression and endplate conformal bone grafting as described in claim 1, characterized in that: The first connecting part is provided with a snap-fit ​​groove, and the second main body section is provided with a snap-fit ​​boss that matches the snap-fit ​​groove at one end near the transverse support part. The second main body section and the first main body section are connected by the matching of the snap-fit ​​boss and the snap-fit ​​groove.

3. The split-body fusion device compatible with anterior spinal flexible robot direct decompression and endplate conformal bone grafting as described in claim 2, characterized in that: The locking boss and the locking groove are interference-fitted.

4. The split-body fusion device compatible with anterior spinal flexible robot direct decompression and endplate conformal bone grafting as described in claim 2, characterized in that: The bottom of the snap-fit ​​groove is provided with a threaded hole, and the second main body section is provided with a stepped connecting hole that runs through the front and rear. The second main body section is connected to the first main body section by a fixing screw that passes through the stepped connecting hole and matches the threaded hole.

5. The split-body fusion device compatible with anterior spinal flexible robot direct decompression and endplate conformal bone grafting as described in claim 2, characterized in that: The snap-fit ​​groove is also provided with a positioning hole, and the snap-fit ​​boss end of the second main body section is provided with a positioning post, which is adapted to the positioning hole.

6. The split-body fusion device compatible with anterior spinal flexible robot direct decompression and endplate conformal bone grafting as described in claim 4, characterized in that: The third main body section has two connecting holes arranged diagonally at both ends. The longitudinal support part of the first main body section and the second main body section are respectively provided with threaded holes. The third main body section is fixed by fixing screws that pass through the connecting holes and are adapted to the threaded holes.

7. The split-body fusion device compatible with anterior spinal flexible robot direct decompression and endplate conformal bone grafting as described in claim 6, characterized in that: The second main body segment is provided with a second positioning hole at the end away from the lateral support, and the third main body segment is provided with a second positioning post at the corresponding position, the second positioning post being adapted to the second positioning hole.

8. The split-body fusion device compatible with anterior spinal flexible robot direct decompression and endplate conformal bone grafting as described in claim 6, characterized in that: The threaded holes in the snap-fit ​​groove, the longitudinal support, and the threaded holes on the second main body section are all fixed with guide wires, and the fixing screw has a through guide hole along the central axis.

9. The split-body fusion device compatible with anterior spinal flexible robot direct decompression and endplate conformal bone grafting as described in claim 1, characterized in that: Tool connection holes are provided on the inner wall of the transverse support of the first main body section and the outer wall of the third main body section.

10. The split fusion device compatible with anterior spinal flexible robot direct decompression and endplate conformal bone grafting according to any one of claims 1 to 9, characterized in that: Two camera mounting holes are provided in the longitudinal support of the first main body section. The camera mounting holes extend from the end of the longitudinal support to the transverse support. A wedge-shaped groove is provided on the inner side of the middle of the longitudinal support. The camera mounting holes are connected to the wedge-shaped groove, and the inclined surface of the wedge-shaped groove is away from the camera mounting holes. A reflective lens is fixedly installed on the inclined surface of the wedge-shaped groove. The camera can be detachably installed in the camera mounting holes.

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