Angle-adjustable or deployable multi-stage anchoring insert system

Abstract

The invention discloses an angle-adjustable or deployable multi-stage anchoring insertion sheet system, and relates to the technical field of medical instruments, the angle-adjustable or deployable multi-stage anchoring insertion sheet system comprises a hollow box body, and the upper surface and the lower surface of the box body are each provided with at least one insertion sheet outlet; the at least one group of inserting piece driving mechanism is arranged in the box body and is used for generating linear driving force; the at least two insertion sheet assemblies are accommodated in the box body in an initial state, and each insertion sheet assembly is in driving connection with the insertion sheet driving mechanism; according to the intervertebral fusion cage, the secondary anchoring part capable of moving relative to the basic anchoring part is arranged, so that the anchoring angle or the opening degree of the fusion cage can be adjusted according to a vertebral form operation of a patient after the fusion cage is implanted, the adaptability to different anatomic forms is improved, and a more flexible anchoring scheme is provided for an intervertebral fusion operation.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to an insert system with adjustable angle or deployable multi-level anchoring. Background Technology

[0002] Interbody fusion is a common treatment for lumbar degenerative diseases, discogenic pain, and vertebral instability. By surgically implanting a fusion cage into the intervertebral space, the height of the intervertebral space can be restored, mechanical support can be provided, and bony fusion can be promoted. To enhance the initial stability of the fusion cage after implantation and prevent slippage or subsidence within the intervertebral space, various fusion cages with anchoring structures have been developed in current technology.

[0003] However, existing anchoring inserts typically have a pre-designed fixed shape, such as a thin sheet with a certain curvature. Once the insert is pushed out of the fusion cage, its final anchoring angle and extension depth are determined by the pre-set mechanical structure and extension stroke, making real-time adjustment based on the patient's specific anatomy during surgery impossible. Due to significant individual differences in vertebral endplate curvature, bone density, and intervertebral disc morphology among patients, this "fixed" anchoring insert may not achieve optimal bone retention and stress distribution in all cases, posing risks such as insufficient anchoring force, insert penetration of the cortical bone, or abnormal stress on the endplate. This limits the personalized adaptability of the fusion cage and the uniformity of surgical outcomes. Summary of the Invention

[0004] The purpose of this invention is to provide an adjustable-angle or deployable multi-level anchoring insert system to solve the problem that the structure and movement trajectory of the anchoring inserts in the prior art are fixed, and cannot be personalized according to the patient's vertebral morphology and bone condition during surgery, resulting in the limited adaptability of the fusion device to different anatomical shapes.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an adjustable angle or deployable multi-level anchoring insert system, including a box body with a hollow interior, wherein at least one insert outlet is provided on the upper and lower surfaces of the box body respectively.

[0006] At least one set of insert drive mechanisms is disposed inside the housing to generate linear driving force;

[0007] At least two insert assemblies are initially housed within the housing, and each insert assembly is driven to be connected to the insert drive mechanism.

[0008] Each of the insert components includes a base anchor, the proximal end of which is connected to the insert drive mechanism and extends outward from the corresponding insert outlet to the outside of the housing under the drive of the insert drive mechanism.

[0009] And at least one adjustable secondary anchor is disposed at the distal end of the base anchor, the secondary anchor being movable relative to the base anchor to further adjust the anchoring angle or opening degree after the base anchor extends to the anchoring position.

[0010] Furthermore, two retaining rings are provided on both sides of the far end of the basic anchor, and a rotating column is movably connected between the two retaining rings. One end of the secondary anchor is fixedly connected to the outer ring wall of the rotating column, and the secondary anchor swings relative to the basic anchor through the rotating column to adjust the anchoring angle.

[0011] Furthermore, a threaded inner hole is provided on one side of the rotating column. When the secondary anchor is adjusted to a predetermined angle, it is screwed into the threaded inner hole by the first locking member. The end of the first locking member abuts against the side of the corresponding retaining ring to fix the angular position of the secondary anchor.

[0012] Furthermore, a receiving groove is provided at the distal end of the basic anchor, and the secondary anchor includes two spreading wings. The roots of the two spreading wings are fixedly installed in the receiving groove. The distal ends of the two spreading wings gradually open outward. Multiple docking slots are provided on the opposite surfaces of the two spreading wings, spaced apart along their contours. An insert plate is inserted into the docking slots at different positions to control the opening degree of the two spreading wings and fix them.

[0013] Furthermore, the insert drive mechanism includes:

[0014] A threaded drive rod is horizontally disposed inside the box body, and the threaded drive rod has two threads with opposite directions of rotation;

[0015] Two ball nuts are respectively engaged with the two threads of the threaded drive rod;

[0016] Two sliding blocks, each of which is fixedly sleeved on the outside of one of the ball nuts, and each of the sliding blocks is connected to at least one of the insert assembly;

[0017] One end of the threaded drive rod is connected to a drive component for driving its rotation.

[0018] Furthermore, the two sliding blocks are respectively fixedly connected to upper and lower limiting rings at opposite ends. One side of the limiting ring has an opening, and an embedded guide post is provided inside the limiting ring. The basic anchor is fixedly connected to the outer wall of the embedded guide post. The other side of the sliding block is provided with a baffle. The side of the sliding block and the embedded guide post away from the baffle is provided with a first transverse limiting groove. The outer ring wall of the embedded guide post is provided with a second limiting groove distributed in an annular pattern. A positioning plate is simultaneously inserted into the first limiting groove and the second limiting groove to lock the circumferential position of the embedded guide post.

[0019] Furthermore, the box body has a through hole on the side plate near the insert plate, a cover plate is provided in the through hole to seal it, and a second locking member is provided on both sides of the cover plate to lock it into the box body.

[0020] Furthermore, the basic anchor and the secondary anchor are made of elastic titanium alloy and have serrated structures on both sides. Each insert outlet has an inclined guide plate at its bottom, which guides the insert assembly through the insert outlet.

[0021] Furthermore, the upper and lower surfaces of the box are symmetrically provided with bone powder injection holes. The bone powder injection holes are used to fill the box with bone graft material after anchoring. The upper and lower surfaces of the box are also provided with protruding structures. The protruding structures are located between the two bone powder injection holes and are serrated protrusions distributed at intervals on the upper and lower surfaces of the box.

[0022] Furthermore, the left and right side walls of the sliding block are provided with sliding grooves, and the inner opposite side plates of the box body are provided with guide ribs that cooperate with the sliding grooves;

[0023] The threaded drive rod has a rotating retaining ring in the middle, and the outer wall of the retaining ring is symmetrically provided with vertical support plates. The other end of the support plate is fixed inside the box.

[0024] Compared to existing technologies, the adjustable-angle or deployable multi-level anchoring insert system provided by this invention, by setting adjustable secondary anchors at the distal end of the basic anchor, allows for secondary adjustment of the anchoring angle or opening degree of the secondary anchors after the fusion device is implanted into the intervertebral space and the basic anchors have initially extended, based on the patient's vertebral morphology, bone quality, or surgical requirements observed during the operation. This design enables the anchors to better conform to the curvature of the vertebral endplates of different individuals, or to expand the anchoring area when necessary, thereby improving adaptability to different anatomical morphologies.

[0025] Furthermore, the adjustable nature of the secondary anchors allows surgeons to make precise adjustments during surgery based on the actual situation to achieve a more ideal bone retention effect. This helps reduce the risk of anchors penetrating the cortical bone and improves the distribution of anchoring stress on the endplate, providing a more flexible and reliable anchoring solution for interbody fusion surgery. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0027] Figure 1 Schematic diagram of the overall structure of the adjustable angle or deployable multi-stage anchoring insert system provided in the embodiments of the present invention. Figure 1 ;

[0028] Figure 2 Schematic diagram of the overall structure of the adjustable angle or deployable multi-stage anchoring insert system provided in the embodiments of the present invention. Figure 2 ;

[0029] Figure 3 This is a cross-sectional view of the internal insert drive mechanism and other components provided in an embodiment of the present invention.

[0030] Figure 4 This is a schematic diagram of the insert assembly (swing-type secondary anchor) and sliding block and other components provided in an embodiment of the present invention;

[0031] Figure 5 This is a schematic diagram of the structure of components such as secondary anchors and basic anchors provided in an embodiment of the present invention;

[0032] Figure 6 Schematic diagram of the insert assembly (spread-wing type secondary anchor) provided in the embodiment of the present invention Figure 1 ;

[0033] Figure 7 Schematic diagram of the insert assembly (spread-wing type secondary anchor) provided in the embodiment of the present invention Figure 2 .

[0034] Explanation of reference numerals in the attached figures:

[0035] 1. Box body; 2. Insert outlet; 3. Basic anchor; 4. Secondary anchor; 401. Spreading wing; 5. Snap ring; 6. Rotating column; 7. Threaded inner hole; 8. First locking element; 9. Receiving groove; 10. Connecting groove; 11. Insert plate; 12. Threaded drive rod; 13. Ball nut; 14. Sliding block; 15. Drive element; 16. Limiting ring; 17. Embedded guide post; 18. Baffle; 19. First limiting groove; 20. Second limiting groove; 21. Positioning plate; 22. Through hole; 23. Cover plate; 24. Second locking element; 25. Guide plate; 26. Bone powder injection hole; 27. Protruding structure; 28. Slide groove; 29. ​​Guide rib; 30. Support ring; 31. Support plate. Detailed Implementation

[0036] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0037] As attached Figure 1 To be continued Figure 3 As shown:

[0038] Example 1:

[0039] The present invention provides an adjustable angle or deployable multi-stage anchoring insert system, including a box 1, which is hollow inside, and at least one insert outlet 2 is provided on the upper surface and the lower surface of the box 1 respectively.

[0040] At least one set of insert drive mechanisms is disposed inside the housing 1 to generate linear driving force;

[0041] At least two insert assemblies are initially housed within the housing 1, and each insert assembly is driven to be connected to the insert drive mechanism.

[0042] Each of the insert components includes a base anchor 3, the proximal end of which is connected to the insert driving mechanism and extends outward from the corresponding insert outlet 2 to the outside of the housing 1 under the drive of the insert driving mechanism.

[0043] And at least one adjustable secondary anchor 4 is disposed at the far end of the base anchor 3. The secondary anchor 4 is movable relative to the base anchor 3 to further adjust the anchoring angle or the degree of opening after the base anchor 3 extends to the anchoring position.

[0044] It should be noted that the core improvement of this invention lies in dividing the anchoring process into two stages. The first stage involves the extension of the basic anchor 3, achieving initial positioning and anchoring of the fusion device within the intervertebral space. The second stage involves the adjustment of the secondary anchor 4, allowing the surgeon to make secondary adjustments to the anchoring angle or opening degree during surgery based on the patient's actual anatomy. This tiered design allows the fusion device to better adapt to the vertebral morphology of different individuals. For example, when encountering patients with a large endplate curvature, the angle of the secondary anchor 4 can be increased to conform to the endplate; when encountering patients with osteoporosis, the expansion wing 401 can be opened to increase the anchoring area and improve pull-out resistance. This intraoperative adjustability allows the same type of fusion device to be applied to a wider range of cases, improving the effectiveness of individualized treatment.

[0045] In this embodiment, the insert driving mechanism includes:

[0046] A threaded drive rod 12 is arranged laterally inside the housing 1, and the threaded drive rod 12 has two threads with opposite directions of rotation;

[0047] Two ball nuts 13 are respectively engaged with the two threads of the threaded drive rod 12;

[0048] Two sliding blocks 14, each of which is fixedly sleeved on the outside of one of the ball nuts 13, and each of which is connected to at least one of the insert assemblies;

[0049] One end of the threaded drive rod 12 is connected to a drive element 15 for driving its rotation.

[0050] It should be noted that the insert drive mechanism is the core component for achieving the linear motion of the basic anchor 3. Using two threads with opposite directions of rotation, when the threaded drive rod 12 rotates, the two ball nuts 13 move synchronously towards or away from each other, thereby driving the two sliding blocks 14 to move closer or further apart. This screw-nut transmission method provides smooth transmission, accurately converting rotational motion into linear motion, and has a self-locking characteristic, maintaining its position after the drive stops. The drive component 15 (such as an internal hex screw head) provides a standard interface for surgical tools, facilitating operation within the minimally invasive channel. Each sliding block 14 can simultaneously drive multiple insert assemblies, achieving synchronous linkage and ensuring the consistency of the anchoring actions on the left and right sides or front and back sides of the fusion device.

[0051] In this embodiment: the two sliding blocks 14 are respectively fixedly connected to the opposite ends of the limiting rings 16 distributed vertically. One side of the limiting ring 16 has an opening, and the limiting ring 16 has an embedded guide post 17. The basic anchor 3 is fixedly connected to the outer wall of the embedded guide post 17. The other side of the sliding block 14 has a baffle 18. The side of the sliding block 14 and the embedded guide post 17 away from the baffle 18 has a first transverse limiting groove 19. The outer ring wall of the embedded guide post 17 has a second limiting groove 20 distributed in a ring. A positioning plate 21 is simultaneously inserted into the first limiting groove 19 and the second limiting groove 20 to lock the circumferential position of the embedded guide post 17.

[0052] It should be noted that this is a specific structure for installing the base anchor 3 onto the sliding block 14, the core of which is to achieve circumferential locking of the base anchor 3. The base anchor 3 is installed in the limiting ring 16 by embedding the guide post 17, and can rotate freely, which provides a prerequisite for the subsequent angle adjustment of the secondary anchor 4 (because the adjustment direction of the secondary anchor 4 needs to correspond to the posture of the base anchor 3). After the base anchor 3 extends into place under the push of the sliding block 14, it needs to be circumferentially fixed to prevent rotation during the adjustment of the secondary anchor 4 or postoperative stress. The positioning plate 21 is simultaneously inserted into the first limiting groove 19 (the fixed reference point) on the sliding block 14 and the annular second limiting groove 20 on the embedded guide post 17, thus locking the rotational freedom of the embedded guide post 17. The design of the annular second limiting groove 20 ensures that the positioning plate 21 can be inserted and locked no matter what angle the embedded guide post 17 rotates to, achieving instant fixation at any angle. The opening on one side of the limiting ring 16 provides a channel for the insertion of the positioning plate 21.

[0053] In this embodiment: a through hole 22 is provided on the side plate of the box body 1 near the insert plate 11, a cover plate 23 is provided in the through hole 22 to seal it, and a second locking member 24 is provided on both sides of the cover plate 23 to lock into the box body 1.

[0054] It should be noted that the through-hole 22 provides an operating window for the surgeon, allowing them to use tools to manipulate the positioning plate 21, inserting or removing it from the first limiting groove 19 and the second limiting groove 20. After the surgery, the through-hole 22 needs to be sealed with a cover plate 23 to prevent soft tissue from growing into the box body 1. The cover plate 23 is fixed to the box body 1 by a second locking element 24 (such as a micro screw) to ensure a reliable seal. This detachable sealing structure meets the needs of intraoperative operations and ensures long-term biological sealing after implantation.

[0055] In this embodiment: the basic anchor 3 and the secondary anchor 4 are made of elastic titanium alloy material, and have serrated structures on both sides. Each insert outlet 2 has an inclined guide plate 25 at its bottom, and the guide plate 25 is used to guide the insert assembly through the insert outlet 2.

[0056] It should be noted that titanium alloy possesses good biocompatibility, strength, and a certain degree of elasticity, allowing the anchor to withstand resistance during bone insertion without easily breaking. The serrated structure on both sides increases the contact area and friction with bone tissue, contributing to improved pull-out resistance. The design of the guide plate 25 is crucial, as it determines the initial angle and trajectory of the basic anchor 3 extending from the housing 1, ensuring that the insert penetrates the vertebral body along the intended oblique path, rather than being ejected vertically, thus achieving a better anchoring effect.

[0057] In this embodiment: the upper and lower surfaces of the box body 1 are respectively provided with bone powder injection holes 26. The bone powder injection holes 26 are used to fill bone graft material into the box body 1 and around it after anchoring. The upper and lower surfaces of the box body 1 are also provided with protruding structures 27. The protruding structures 27 are located between the two bone powder injection holes 26 and are serrated protrusions distributed at intervals on the upper and lower surfaces of the box body 1.

[0058] It should be noted that the bone graft injection holes 26 are key channels for achieving long-term bony fusion. After the anchoring operation is completed, autologous or artificial bone material can be filled into the internal cavity of the housing 1 and the gap between the housing 1 and the vertebral endplate through these holes. These bone graft materials act as a scaffold for bone growth, inducing new bone ingrowth and ultimately achieving firm fusion between the vertebral bodies. The serrated ridges on the surface of the housing 1 can be embedded into the endplate in the early stages of implantation, providing initial anti-slip stability and preventing displacement of the fusion device when operating the insert drive mechanism.

[0059] In this embodiment: the left and right side walls of the sliding block 14 are provided with sliding grooves 28, and the inner opposite side plates of the box body 1 are provided with guide ribs 29 that cooperate with the sliding grooves 28;

[0060] The threaded drive rod 12 is provided with a rotatably connected support ring 30 in the middle. The outer wall of the support ring 30 is symmetrically provided with vertical support plates 31. The other end of the support plate 31 is fixed inside the box body 1.

[0061] It should be noted that the cooperation between the slide groove 28 and the guide rib 29 constitutes the linear guide mechanism of the sliding block 14, ensuring that the sliding block 14 can only move smoothly along the axial direction under the drive of the threaded drive rod 12, without deflection or jamming. The support ring 30 and the support plate 31 provide intermediate support points for the long threaded drive rod 12, effectively preventing radial runout or bending deformation of the drive rod during rotation, ensuring the smoothness of transmission and the synchronization of the movement of the two sliding blocks 14, and improving the reliability and service life of the entire drive mechanism.

[0062] As attached Figure 1 Appendix Figure 4 and attached Figure 5 As shown:

[0063] Example 2:

[0064] In this embodiment: two retaining rings 5 ​​are provided on both sides of the far end of the basic anchor 3, and a rotating column 6 is movably connected between the two retaining rings 5. One end of the secondary anchor 4 is fixedly connected to the outer ring wall of the rotating column 6. The secondary anchor 4 is swung relative to the basic anchor 3 by the rotating column 6 to adjust the anchoring angle.

[0065] It should be noted that this is a specific structure for adjusting the angle of the secondary anchor 4. The retaining ring 5 provides stable support for the rotating column 6, which can rotate freely between the two retaining rings 5, thereby causing the secondary anchor 4 fixed thereon to swing synchronously. This rotating pair structure is simple, reliable, and space-saving, enabling flexible adjustment of the secondary anchor 4 within a certain angle range within the limited distal space of the basic anchor 3. During surgery, the surgeon can use a specialized micro-tool to manipulate the secondary anchor 4, adjusting it to the desired angle so that its tip can enter the vertebral bone at a more ideal cutting angle, thus obtaining better holding force.

[0066] In this embodiment: a threaded inner hole 7 is provided on one side of the rotating column 6. When the secondary anchor 4 is adjusted to a predetermined angle, it is screwed into the threaded inner hole 7 by the first locking member 8. The end of the first locking member 8 abuts against the side of the corresponding retaining ring 5 to fix the angle position of the secondary anchor 4.

[0067] It should be noted that this structure is a locking mechanism after angle adjustment. Once the secondary anchor 4 is adjusted to the ideal angle, it needs to be reliably fixed to prevent angle changes due to stress during subsequent operations or postoperatively. After the first locking element 8 (e.g., a miniature set screw) is screwed into the threaded inner hole 7 of the rotating column 6, its end will tightly abut against the side of the retaining ring 5, locking the rotational freedom of the rotating column 6 through friction. This locking method is simple to operate; it only requires a pre-reserved operating channel on the housing 1 or the basic anchor 3 for a miniature screwdriver to enter, ensuring that the adjusted angle position remains stable during and after surgery.

[0068] As attached Figure 1 Appendix Figure 6 and attached Figure 7 As shown:

[0069] Example 3:

[0070] In this embodiment: the distal end of the basic anchor 3 is provided with a receiving groove 9, the secondary anchor 4 includes two spreading wings 401, the roots of the two spreading wings 401 are fixedly installed in the receiving groove 9, the distal ends of the two spreading wings 401 gradually open outward, and multiple docking slots 10 are provided on the opposite surfaces of the two spreading wings 401 along their contours and spaced apart. A plate 11 is inserted into the docking slots 10 at different positions to control the opening degree of the two spreading wings 401 and fix them.

[0071] It should be noted that this is a specific structure for adjusting the opening degree of a secondary anchor. The roots of the two spreading wings 401 are fixed, and their distal ends are elastic or connected by hinges, giving them a tendency to open outwards. By inserting a plate 11 between the two spreading wings 401, the plate 11 engages with different mating slots 10, forcing the spreading wings 401 to overcome elastic force and fixing the opening angle at different levels. The spacing of the mating slots 10 allows for graded adjustment of the opening angle. This adjustment and fixing method is simple in structure, requires no complex drive mechanism, and is intuitive and reliable in operation. When it is necessary to increase the anchoring area, a deeper slot can be inserted to allow the spreading wings 401 to open wider; when it is necessary to reduce intrusion, a shallower slot can be selected. The plate 11 also acts as a locking mechanism to prevent the spreading wings 401 from closing during use.

[0072] A brief explanation of how the fusion unit works:

[0073] During surgical implantation, all insert components are housed within the housing 1. After the fusion unit housing 1 is implanted into the intervertebral space, the threaded drive rod 12 is rotated by the drive component 15, which drives the two sliding blocks 14 to move in opposite directions. This pushes the base anchor 3 connected to the sliding blocks 14 to extend out from the insert outlet 2, and its tip initially penetrates the upper and lower vertebrae to achieve the first stage of anchoring.

[0074] Subsequently, the doctor can decide whether to activate secondary anchoring adjustment based on intraoperative imaging or assessment of the patient's bone condition. If angle adjustment is required, the secondary anchor 4 can be moved using a tool to swing around the rotating column 6 to the ideal angle, and then screwed into the first locking member 8 to lock it. If the opening degree needs to be adjusted, the insert plate 11 can be inserted into the docking slots 10 at different positions to fix the two opening wings 401 at the required opening angle.

[0075] After the basic anchor 3 extends into place, if it is necessary to lock its circumferential position to prevent rotation, the positioning plate 21 can be inserted through the through hole 22, so that it can be simultaneously locked into the first limiting groove 19 of the sliding block 14 and the second limiting groove 20 of the embedded guide post 17, and then the through hole 22 can be sealed with the cover plate 23.

[0076] Finally, bone graft material is filled into and around the box 1 through the bone powder injection hole 26 to complete the surgery.

[0077] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An adjustable-angle or deployable multi-stage anchoring insert system, characterized in that, include: The box body (1) is hollow inside, and at least one insert outlet (2) is provided on the upper and lower surfaces of the box body (1). At least one set of insert drive mechanisms is disposed inside the housing (1) for generating linear driving force; At least two insert assemblies are initially housed within the housing (1), and each insert assembly is driven to connect with the insert drive mechanism; Each of the insert components includes a base anchor (3), the proximal end of which is connected to the insert drive mechanism and extends outward from the corresponding insert outlet (2) to the outside of the housing (1) under the drive of the insert drive mechanism. And at least one adjustable secondary anchor (4) is disposed at the far end of the base anchor (3), the secondary anchor (4) being movable relative to the base anchor (3) to further adjust the anchoring angle or opening degree after the base anchor (3) extends to the anchoring position.

2. The adjustable angle or deployable multi-stage anchoring insert system according to claim 1, characterized in that, The base anchor (3) has two retaining rings (5) on both sides of its far end. A rotating column (6) is movably connected between the two retaining rings (5). One end of the secondary anchor (4) is fixedly connected to the outer ring wall of the rotating column (6). The secondary anchor (4) swings relative to the base anchor (3) through the rotating column (6) to adjust the anchoring angle.

3. The adjustable angle or deployable multi-stage anchoring insert system according to claim 2, characterized in that, The rotating column (6) has a threaded inner hole (7) on one side. When the secondary anchor (4) is adjusted to a predetermined angle, it is screwed into the threaded inner hole (7) by the first locking member (8). The end of the first locking member (8) abuts against the side of the corresponding retaining ring (5) to fix the angle position of the secondary anchor (4).

4. The adjustable angle or deployable multi-stage anchoring insert system according to claim 1, characterized in that, The base anchor (3) has a receiving groove (9) at its far end. The secondary anchor (4) includes two spreading wings (401). The roots of the two spreading wings (401) are fixedly installed in the receiving groove (9). The far ends of the two spreading wings (401) gradually open outward. Multiple docking slots (10) are provided on the opposite surfaces of the two spreading wings (401) along their contours. A plate (11) is inserted into the docking slots (10) at different positions to control the opening degree of the two spreading wings (401) and fix them.

5. The adjustable angle or deployable multi-stage anchoring insert system according to claim 1, characterized in that, The insert drive mechanism includes: A threaded drive rod (12) is arranged laterally inside the box (1), and the threaded drive rod (12) has two threads with opposite directions of rotation; Two ball nuts (13) are respectively engaged with the two threads of the threaded drive rod (12); Two sliding blocks (14), each of the sliding blocks (14) being fixedly sleeved on the outside of one of the ball nuts (13), and each of the sliding blocks (14) being connected to at least one of the insert assembly; One end of the threaded drive rod (12) is connected to a drive element (15) for driving its rotation.

6. The adjustable angle or deployable multi-stage anchoring insert system according to claim 5, characterized in that, Two sliding blocks (14) are fixedly connected to opposite ends of upper and lower limiting rings (16). One side of the limiting ring (16) is open, and an embedded guide post (17) is provided inside the limiting ring (16). The basic anchor (3) is fixedly connected to the outer wall of the embedded guide post (17). The other side of the sliding block (14) is provided with a baffle (18). The side of the sliding block (14) and the embedded guide post (17) away from the baffle (18) is provided with a first horizontal limiting groove (19). The outer ring wall of the embedded guide post (17) is provided with a second ring-shaped limiting groove (20). A positioning plate (21) is inserted into the first limiting groove (19) and the second limiting groove (20) at the same time to lock the circumferential position of the embedded guide post (17).

7. The adjustable angle or deployable multi-stage anchoring insert system according to claim 6, characterized in that, The box body (1) has a through hole (22) on one side plate near the insert plate (11). A cover plate (23) is provided inside the through hole (22) to seal it. A second locking member (24) is provided on both sides of the cover plate (23) to lock into the box body (1).

8. The adjustable angle or deployable multi-stage anchoring insert system according to claim 1, characterized in that, The basic anchor (3) and the secondary anchor (4) are made of elastic titanium alloy and have serrated structures on both sides. Each insert outlet (2) has an inclined guide plate (25) at its bottom, which is used to guide the insert assembly through the insert outlet (2).

9. The adjustable angle or deployable multi-stage anchoring insert system according to claim 1, characterized in that, The upper and lower surfaces of the box (1) are respectively provided with bone powder injection holes (26). The bone powder injection holes (26) are used to fill bone graft material into the box (1) and around it after anchoring. The upper and lower surfaces of the box (1) are also provided with protruding structures (27). The protruding structures (27) are located between the two bone powder injection holes (26) and are serrated protrusions distributed at intervals on the upper and lower surfaces of the box (1).

10. The adjustable angle or deployable multi-stage anchoring insert system according to claim 5, characterized in that, The sliding block (14) has a sliding groove (28) on its left and right side walls, and the box body (1) has guide ribs (29) on its internal opposite side plates that cooperate with the sliding groove (28). The threaded drive rod (12) is provided with a rotating support ring (30) in the middle. The outer wall of the support ring (30) is symmetrically provided with vertical support plates (31). The other end of the support plate (31) is fixed inside the box (1).

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