Interbody fusion cage with built-in anchoring element

Abstract

The invention relates to a prosthesis used for being implanted between vertebrae, and particularly discloses an interbody fusion cage with a built-in anchoring element, which comprises a fusion cage body provided with two end surfaces, an anterior wall, a posterior wall, two side walls and a bone grafting window; two first linear channels extending from the front wall and penetrating to the rear side area of the end face and two second linear channels extending from the rear wall and penetrating to the front side area of the end face are formed in the fusion cage body on each side of the bone grafting window; the anchor rod is pre-arranged in the linear channel; the actuating mechanism comprises an operating head exposed to the front wall of the fusion cage body and an actuating main body positioned in the fusion cage body and used for driving the anchor rod; the operation head is screwed so that the actuating body can drive the anchor rods in the first linear channel and the second linear channel to obliquely stretch out forwards from the rear side area and the front side area of the end face correspondingly and respectively under the guidance of the linear channels, and the anchor rods are inserted into the vertebrae through the end plate.

Description

TECHNICAL FIELD

[0001] The present application relates to a prosthesis for implanting into the intervertebral space of the cervical spine of a human body, and in particular to an intervertebral cage with an anchoring element. BACKGROUND

[0002] It is known that a cage implanted into the intervertebral space between two vertebrae (the damaged intervertebral disc of the human body located in the intervertebral space has been removed before the cage is implanted) is used to maintain the normal physiological distance between the two vertebrae and to promote the growth of new bone on the endplates of the vertebrae, so that the two vertebrae are eventually fused in a normal physiological posture by means of the new bone grown. A typical surgical procedure for implanting a cage into the intervertebral space between two vertebrae is an anterior cervical discectomy and fusion (ACDF) procedure, by which the cage is delivered into the intervertebral space between two vertebrae through the front side of the cervical spine.

[0003] During the implementation of the fusion procedure, after the cage is delivered into the intervertebral space, fixation of the two vertebrae corresponding to the cage is required, because on the one hand, a certain contact force needs to be formed between each end face of the cage and the endplate of the corresponding vertebra to promote the growth of new bone on the endplate, and on the other hand, the cage needs to be prevented from being displaced after the surgery and the two vertebrae need to be prevented from being misaligned (displacement of the cage after the surgery can lead to the cage being pulled out of the intervertebral space, poor fusion of the vertebrae, and other adverse consequences, and misalignment of the vertebrae can seriously affect the reconstruction or maintenance of the physiological curvature of the cervical spine). Currently, there are two typical ways to fix the vertebrae: the first way is to use a bone plate to attach to the front side of the two vertebrae to fix the two vertebrae at the same time, and the bone plate is connected or not connected to the cage located in the intervertebral space. A typical defect of this fixation method is that the bone plate is exposed and protrudes from the front side of the vertebrae, so the bone plate can affect the function of the anterior cervical tissue and cause pain; as shown in Figure 1 The second way is to use an anchoring element (such as a bone screw or an anchor rod 201) that is inserted into the vertebra 1000 through the end face of the cage 200 from the end face of the cage 200 by penetrating a slanted and extended channel pre-formed on the cage 200, and then penetrating the endplate 1001 of the vertebra 1000 and being inserted into the vertebra 1000, so that the cage 200 and the two vertebrae 1000 are anchored. Since the cage 200 and the anchoring element are surrounded by new bone after the fusion of the two vertebrae 1000 and are not exposed outside the vertebrae 1000, the surrounding human tissue of the vertebrae 1000 can be avoided from being affected.

[0004] However, the fixation method of using an anchoring element to anchor the cage and the two vertebrae in the prior art has the following defects: In terms of the stability of the anchoring after the surgery, as shown in Figure 1As shown, in the case of using the anchor rod 201 to implement anchoring, in the front and rear directions, only the anchor rod 201 exists, which is inserted into the vertebra 1000 with the end surface of the self-fusion device 200 inclined rearward, so that in the front and rear directions, only one anchor point exists between each end surface of the fusion device 200 and the end plate 1001 of the corresponding vertebra 1000, and thus in the early postoperative period when the vertebra 1000 is not fused, the end surface of the fusion device 200 and the end plate 1001 of the vertebra 1000 can be frequently separated due to the pitching action of the patient, thereby affecting the new bone fusion, and the reason why the anchor rod 201 can only be inserted into the vertebra 1000 from the end surface of the fusion device 200 with the front wall of the fusion device 200 inclined rearward through the channel is that the operator can only perform a pushing operation on the anchor rod 201 from the front side of the vertebra 1000 and cannot perform a pushing operation on the anchor rod 201 from the rear side of the vertebra 1000.

[0005] In terms of the convenience of intraoperative operation and the balance of stress, in the prior art, the tail of the anchor rod is directly subjected to linear pushing force by using an external operating instrument to make the head of the anchor rod pass through the fusion device and be inserted into the vertebra, and the operation difficulty is significantly increased by directly applying linear pushing force compared to directly applying torsional force, and because only the anchor rod is inserted into the vertebra with the rearward inclination and there is no anchor rod inserted into the vertebra with the forward inclination, the fusion device can be displaced rearward with the anchor rod due to the unbalanced stress in the process of inserting the anchor rod, thereby causing positional deviation.

[0006] As shown, Figure 2 Although the fusion device 200 with the anchor rod 201 built-in appears in the prior art, after the fusion device 200 is placed in the intervertebral space, the anchor rod 201 can basically extend from the end surface of the fusion device 200 in the front and rear directions and be inserted into the vertebra 1000 to make the fusion device 200 form two anchor points with the vertebra 1000 in the front and rear directions, however, the anchor rod 201 does not extend and be inserted into the vertebra 1000 in a manner along a certain constant axis, but extends and is inserted into the vertebra 1000 in a manner with rotation or translation, thereby causing the cross section of the anchor hole 1002 in which the vertebra 1000 is inserted by the anchor rod 201 to be much larger than the cross section of the anchor rod 201, which not only greatly reduces the anchoring effect, but also significantly increases the damage area of the anchor rod 201 to the bone body of the vertebra. SUMMARY

[0007] In view of the above technical problems existing in the prior art, the present application provides an intervertebral fusion device with an anchor element built-in.

[0008] To solve the above technical problems, the technical scheme adopted by the present application is: An intervertebral fusion device with an anchor element built-in, comprising: A fusion device body has two end faces for respectively facing the end plates of two vertebrae, a front wall and a rear wall in the front-rear direction between the two end faces, two side walls in the left-right direction, and bone graft windows through the two end faces; each side of the bone graft windows in the left-right direction is provided with a linear channel in the fusion device body, and the linear channel includes two first linear channels extending from the front wall to the rear and respectively obliquely through the rear side regions of the two end faces, and two second linear channels extending from the rear wall to the front and respectively obliquely through the front side regions of the two end faces; An anchor rod is pre-installed in each linear channel; An actuating mechanism includes an operating head exposed to the front wall of the fusion device body for screwing, and an actuating body located in the fusion device body for driving the anchor rods, after the fusion device body is placed in the intervertebral space, the anchor rods in the first linear channels and the second linear channels are inserted into the vertebrae through the end plates by screwing the operating head to drive the actuating body to make the anchor rods obliquely extend from the rear side regions of the end faces and obliquely extend from the front side regions of the end faces, respectively, under the guidance of the linear channels in which the anchor rods are located.

[0009] Preferably, The fusion device body is provided with a mounting hole extending in the front-rear direction; the first linear channel and the second linear channel each have a lead-in straight segment corresponding to the through port with the front wall and the rear wall, a lead-out straight segment corresponding to the through port 2121 with the two end faces and inclined relative to the lead-in straight segment, and a transition segment connecting the lead-in straight segment and the lead-out straight segment; the lead-in straight segment is adjacent to the mounting hole and radially through; The actuating body includes a rotating rod passing through the mounting hole and rotating driven by the operating head, and two driving sleeves with helical tooth grooves configured on the outer circumferential surface and axially spaced arranged on the rotating rod; the two driving sleeves are respectively located at the axial positions corresponding to the lead-in straight segments of the first linear channel and the second linear channel; The anchor rod is a straight rod before being placed in the linear channel; at least on the outer circumferential surface of the anchor rod adjacent to the mounting hole, a row of side teeth are arranged along the extension direction of the anchor rod; after the head of the anchor rod is inserted into the lead-in straight segment of the linear channel from the through port of the linear channel, the side teeth of the anchor rod enter the mounting hole radially and mesh with the helical grooves of the driving sleeve, so that the anchor rod is driven by the helical sleeve to move along the linear channel and extend from the through port 2121 after sequentially passing through the lead-in straight segment, the transition segment and the lead-out straight segment.

[0010] Preferably, a first limiting step is machined on the anchor rod towards the head, and a second limiting step is machined on the linear channel towards the through port, the first limiting step limits the extension amount of the anchor rod by resisting the second limiting step to fix the anchor rod; wherein: Each driving sleeve is sleeved on the rotating rod in a manner that it can move axially relative to the rotating rod and is limited in rotation; An elastic component is sleeved on the rotating rod on both sides of the axial direction of each driving sleeve, and the elastic component is used for applying an elastic force to the driving sleeve and allowing the driving sleeve to axially move relative to the rotating rod against the elastic force.

[0011] Preferably, two mounting holes arranged in an upper and lower manner are formed in the fusion cage body on each side of the bone graft window; two actuating mechanisms are correspondingly arranged on the fusion cage body on each side of the bone graft window, and the actuating bodies of the two actuating mechanisms are respectively mounted in the two mounting holes; wherein: A first linear channel and a second linear channel are arranged on both sides of each mounting hole in the left-right direction; the two driving sleeves on the rotating rod of the actuating body are respectively engaged with the side teeth of the anchor rods in the first linear channel and the second linear channel on the left and right sides of the mounting hole where the actuating body is located, so as to drive the two anchor rods to tilt out of the rear side region and the front side region of the end face adjacent to the mounting hole synchronously, thereby, the four anchor rods are driven by the two actuating mechanisms.

[0012] Preferably, one mounting hole is formed in the fusion cage body on each side of the bone graft window; one actuating mechanism is correspondingly arranged on the fusion cage body on each side of the bone graft window, and the actuating body of the one actuating mechanism is mounted in the one mounting hole; The two first linear channels and the two second linear channels are arranged on both sides of the mounting hole in the left-right direction, and the two first linear channels are located on the same side and the two second linear channels are located on the same side; the two driving sleeves on the rotating rod of the actuating body are respectively engaged with the side teeth of the two anchor rods in the two first linear channels and the side teeth of the two anchor rods in the two second linear channels at the same time, so as to drive the four anchor rods to respectively extend out of the rear side region and the front side region of the two end faces, thereby, the four anchor rods are driven by the one actuating mechanism.

[0013] Preferably, The lead-in straight line segments of the two first linear channels are coincided and the lead-in straight line segments of the two second linear channels are coincided to form a common segment of the linear channels, so that the lead-out straight line segments of the two first linear channels and the lead-out straight line segments of the two first linear channels form two branch segments separated by a transition segment; The two anchor rods are stacked to form an anchor rod pair, the two anchor rods in the anchor rod pair are integrally combined at the tail to form a combined segment, and the side teeth of the two anchor rods are aligned, so that the anchor rod pair can be synchronously inserted into the common segment of the linear channels so that the aligned side teeth are engaged with the driving sleeves, thereby, the anchor rod pair is driven by the driving sleeves, and the two anchor rods of the anchor rod pair respectively extend out of the two end faces through the branch segments.

[0014] Preferably, the anchor rod is in a rhombic section, and the linear channel is in a rhombic section matching the anchor rod; wherein: The linear channel is radially through the mounting hole, and the side teeth are arranged on the edges of the anchor rod.

[0015] Preferably, the opposite edges of the anchor rod are both provided with side teeth.

[0016] Preferably, the side teeth are right trapezoidal teeth, the straight tooth wall of the right trapezoidal teeth is towards the tail of the anchor rod, and the inclined tooth wall of the right trapezoidal teeth is towards the head of the anchor rod.

[0017] Preferably, the anchor rod has opposite acute edges and obtuse edges, and the side teeth are arranged on the acute edges.

[0018] Compared with the prior art, the interbody fusion cage with an embedded anchoring element has the following advantages: 1. In terms of postoperative anchoring stability: 1) the front and rear regions of each end surface of the fusion cage body are provided with two anchor rods for insertion into the vertebrae, so that each end surface of the fusion cage body has two anchor points in the front and rear directions between the end surface and the end plate, which can effectively prevent the end surface of the fusion cage body and the end plate of the vertebrae from separating with the patient's pitching action, thereby improving the anchoring stability; 2) the anchor rod is guided by the leading straight line segment of the linear channel to extend out of the end surface of the fusion cage body, so that during the process of the anchor rod extending out of the end surface of the fusion cage body and being inserted into the vertebrae, the insertion direction of the anchor rod does not change, so that the cross section of the insertion hole is not much larger than the cross section of the anchor rod, which not only increases the firmness of the combination between the anchor rod and the vertebrae but also reduces the damage of the anchor rod to the bone body of the vertebrae; 3) the side teeth arranged on the anchor rod and arranged in the extension direction not only drive the anchor rod, but also enter the vertebrae after the anchor rod is inserted into the vertebrae, and after the new bone growing in the insertion hole enters the tooth groove between the side teeth, the combination ability of the anchor rod and the vertebrae is significantly increased, preventing the anchor rod from being withdrawn from the vertebrae.

[0019] 2. In terms of convenience of operation and balance of stress during operation: 1) only the operation head of the actuating mechanism needs to be screwed on the front side of the vertebrae through the front approach to make the four anchor rods extend out of the front and rear regions of the two end surfaces of the fusion cage body and be inserted into the vertebrae; 2) by making the anchor rods extend out of the rear region of each end surface of the fusion cage body and the front region of each end surface of the fusion cage body, the fusion cage body is balanced in the front and rear directions, thereby inhibiting the displacement of the fusion cage body to a certain extent.

[0020] 3. The rationality of the structure configuration: the anchor rod is driven by its own structure through the configuration of the side teeth on the anchor rod as the anchor element inserted into the vertebra, so as to avoid adding a separate transmission component to drive the anchor rod, thereby simplifying the structure, and the side teeth are also used to enhance the combination ability of the anchor rod and the vertebra after the operation.

[0021] 4. By allowing the driving sleeve to move axially under a certain elastic damping, all the anchor rods and the fusion cage body are finally fixed through the combination of the two stepped surfaces, avoiding the fact that some anchor rods cannot be fixed with the fusion cage body due to machining errors or meshing errors.

[0022] 5. In some preferred structures of the fusion cage, only by rotating the operation head of an actuating mechanism can four anchor rods be driven, thereby simplifying the operation.

[0023] The summary of various implementations or examples of the technology described in the present application is not a comprehensive disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF DRAWINGS

[0024] In the drawings, which are not necessarily drawn to scale, like numerals can describe similar components in different views. Like numerals having different letter suffixes can represent different instances of similar components. The drawings illustrate generally, by way of example, various embodiments of the application and are not intended to limit the application in any way. The same or similar reference numerals in different drawings can represent the same or similar functionality. Such embodiments are examples and are not intended to be exhaustive or exclusive, as to the disclosure of the present device or method.

[0025] Figure 1 A state view of a fusion cage of one type of structure in the prior art and the anchoring of the vertebra.

[0026] Figure 2 A state view of a fusion cage of another type of structure in the prior art and the anchoring of the vertebra.

[0027] Figure 3 A perspective structural schematic view of the front side of an intervertebral fusion cage of a first specific structure provided by an embodiment of the present application.

[0028] Figure 4 A perspective structural schematic view of the rear side of an intervertebral fusion cage of a first specific structure provided by an embodiment of the present application.

[0029] Figure 5 A front elevation view of an intervertebral fusion cage of a first specific structure provided by an embodiment of the present application.

[0030] Figure 6 A-A cross-sectional view of Figure 5 A-A cross-sectional view of

[0031] Figure 7 A-A cross-sectional view of Figure 5 A-A cross-sectional view of

[0032] Figure 8 A-A cross-sectional view of A-A cross-sectional view of

[0033] A-A cross-sectional view of Figure 9 A-A cross-sectional view of A-A cross-sectional view of

[0034] A-A cross-sectional view of Figure 10 A-A cross-sectional view of A-A cross-sectional view of

[0035] A-A cross-sectional view of Figure 11 A-A cross-sectional view of A-A cross-sectional view of

[0036] A-A cross-sectional view of Figure 12 A-A cross-sectional view of A-A cross-sectional view of

[0037] A-A cross-sectional view of Figure 13 A-A cross-sectional view of A-A cross-sectional view of

[0038] A-A cross-sectional view of Figure 14 A-A cross-sectional view of A-A cross-sectional view of

[0039] A-A cross-sectional view of Figure 15 A-A cross-sectional view of A-A cross-sectional view of

[0040] A-A cross-sectional view of Figure 16 A-A cross-sectional view of A-A cross-sectional view of

[0041] A-A cross-sectional view of Figure 17 A-A cross-sectional view of A-A cross-sectional view of

[0042] A-A cross-sectional view of 10-Fusion device body; 11-End face; 121-Anterior wall; 122-Rear wall; 13-Side wall; 14-Bone graft window; 15-Protruding tip; 16-Clasp; 17-Mounting hole; 21-First linear channel; 211-Inlet straight segment; 2111-Inlet port; 212-Outlet straight segment; 2121-Outlet port; 213-Transition segment; 22-Second linear channel; 221-Inlet straight segment; 2211-Inlet port; 222 - Straight line segment; 2221 - Extrusion port; 223 - Transition section; 30 - Anchor bolt; 31 - Side tooth; 32 - First limiting step; 33 - Connecting section; 34 - Wedge surface; 40 - Actuation mechanism; 41 - Operating head; 42 - Rotating rod; 421 - Intermediate limiting shaft; 422 - Front limiting shaft; 423 - Rear limiting shaft; 43 - Drive sleeve; 431 - Front drive sleeve; 432 - Rear drive sleeve; 433 - Helical tooth groove; 44 - Elastic component.

[0043] 1000 - Vertebra; 1001 - Endplate. Detailed Implementation

[0044] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0045] To keep the following description of the embodiments of the present invention clear and concise, detailed descriptions of known functions and known components are omitted.

[0046] This invention discloses an intervertebral fusion device, which is anchored to two vertebrae 1000 by means of an anchor rod 30 passing through the endplate 1001 of the two vertebrae 1000. The intervertebral fusion device provided by this invention is suitable for implantation into the intervertebral space of two vertebrae 1000 in anterior cervical discectomy and fusion surgery (hereinafter referred to as anterior cervical surgery).

[0047] like Figures 3 to 17 As shown, the intervertebral fusion device includes: a fusion device body 10, an anchor 30, and an actuation mechanism 40; before the intervertebral fusion device is placed in the intervertebral space, as... Figure 3 andFigure 4 As shown, the anchor rod 30 is pre-embedded in the cage body 10, after the intervertebral cage body 10 is placed in the intervertebral space in a reasonable position, the anchor rod 30 is driven by the actuating mechanism 40 to extend out of the cage body 10 and insert into the vertebra 1000 through the endplate 1001. Figure 12 And Figure 13 As shown, the anchor rod 30 is driven by the actuating mechanism 40 to extend out of the cage body 10 and insert into the vertebra 1000 through the endplate 1001.

[0048] The cage body 10 has two end faces 11 (i.e. upper end face and lower end face) facing each other, after the intervertebral cage is placed in the intervertebral space, the two end faces 11 of the cage body 10 are respectively towards the endplates 1001 of the two vertebrae 1000 and used to contact the two endplates 1001; a bone graft window 14 is configured on the cage body 10, the bone graft window 14 is pre-filled with bone tissue and / or bone growth promoting material (not shown) for promoting the endplate 1001 to grow new bone to promote the fusion of the vertebrae 1000 and improve the fusion effect; with the front, back, left and right of the cervical spine as the reference, the wall of the cage body 10 between the two end faces 11 includes front wall 121, back wall 122 and two side walls 13 (i.e. left side wall and right side wall) opposite to each other, after the intervertebral cage is placed in the intervertebral space through the anterior cervical approach, the front wall 121 of the cage body 10 faces the front side, the front wall 121 is the wall to which the delivery instrument is attached when delivering the cage, the side where the front wall 121 is located is also the side that is convenient for the operation of the operation instrument such as the anchor rod 30, the operation instrument is difficult to operate on the side where the side wall 13 is located, and it is not difficult to understand that the operation instrument cannot be operated on the side where the back wall 122 is located. In some preferred structures, a plurality of protruding tips 15 arranged in a matrix are machined on the two end faces 11 of the cage body 10, after the cage body 10 is anchored with the vertebra 1000 through the anchor rod 30, the protruding tips 15 on the end face 11 pierce into the endplate 1001 of the vertebra 1000 to inhibit the displacement of the cage body 10 and stimulate the endplate 1001 to grow new bone. In some preferred structures, a bayonet 16 is configured in the middle of the front wall 121 of the cage body 10, when performing the anterior cervical approach surgery, the cage body 10 is attached to the head of the delivery instrument through the bayonet 16 of the front wall 121, so that it can be placed in the intervertebral space by the delivery instrument.

[0049] As shown, Figure 8As shown, a set of linear channels are arranged in the solid region of the cage body 10 on each side of the bone graft window 14 (the so-called solid region is relative to the bone graft window 14, which is the hollowed region of the cage body 10), that is, a set of linear channels are arranged in the solid region between each side wall of the bone graft window 14 and each side wall 13 (left side wall and right side wall) of the cage body 10, so that the cage body 10 has two sets of linear channels on the left and right sides of the bone graft window 14. Each set of linear channels includes four linear channels, that is, two first linear channels 21 and two second linear channels 22, the two first linear channels 21 each extend rearward from the front wall 121 of the cage body 10 and finally tilt rearward to pass through to the rear side region of the two end faces 11 of the cage body 10, and the two second linear channels 22 each extend forward from the rear wall 122 of the cage body 10 and finally tilt rearward to pass through to the front side region of the two end faces 11. Each first linear channel 21 includes a straight lead-in segment 211 passing through the front wall 121 to form an entry port 2111, a straight lead-out segment 212 passing through the end face 11 to form an exit port 2121, and an arc-shaped transition segment 213 connecting the straight lead-in segment 211 and the straight lead-out segment 212, and each second linear channel 22 includes a straight lead-in segment 221 passing through the rear wall 122 to form an entry port 2211, a straight lead-out segment 222 passing through the end face 11 to form an exit port 2121, and an arc-shaped transition segment 223 connecting the straight lead-in segment 221 and the straight lead-out segment 222, so that each linear channel arranged has a straight lead-in segment, a transition segment, and a straight lead-out segment.

[0050] The cage body 10 can be made of PEEK (polyether ether ketone) material or titanium alloy (such as Ti-6Al-4V) material, and preferably, the cage body 10 is made of PEEK (polyether ether ketone) material, so that the intervertebral space fusion has similar mechanical properties to the vertebra 1000, and can be penetrated by X-rays without affecting the postoperative imaging of bone fusion. If the cage body 10 is made of PEEK material, the injection molding process, mechanical processing process or injection molding and mechanical processing combined process can be used to obtain the shape of the cage body 10, the linear channels and the mounting hole 17 and other related structures to be introduced below, for example, when using the injection molding process, the linear channels are obtained after injection molding by embedding the embedded parts adapted to the structure of the linear channels, and when using mechanical processing, the mounting hole 17 to be introduced below is obtained by drilling with a drill bit.

[0051] Each entity region where the linear channels are located is processed with a mounting hole 17 extending in the front-rear direction and at least through the front wall 121 of the body 10 of the cage, each linear channel of each group of linear channels corresponds to a mounting hole 17 and is located on both sides of the mounting hole 17 in the left-right direction, and the lead-in straight section of the linear channel is radially through the mounting hole 17, that is, the lead-in straight section 211 of each first linear channel 21 located on the front side is radially through the front hole section of the mounting hole 17, and the lead-in straight section of each second linear channel 22 located on the rear side is radially through the rear hole section of the mounting hole 17.

[0052] As shown in Figure 7 and Figure 13 , the linear channels are used for pre-placing the anchor rod 30 and guiding the anchor rod 30 to extend from the end face 11. Figure 10 As shown in Figures 3 to 5 and in combination with Figure 6 , the cross section of the anchor rod 30 matches the cross section of the linear channel, a row of side teeth 31 are formed on the surface of the anchor rod 30 adjacent to the mounting hole 17 (that is, the surface of the anchor rod 30 located on one side of the mounting hole 17 after the anchor rod 30 is inserted into the linear channel), after the anchor rod 30 enters the linear channel from the entry port of the linear channel, the side teeth 31 of the anchor rod 30 enter the mounting hole 17 radially due to the lead-in straight section of the linear channel and the through hole of the mounting hole 17, specifically, as shown in Figure 10 , after the anchor rod 30 enters the lead-in straight section 211 of the first linear channel 21 located on the front side of the body 10 of the cage from the entry port 2111 of the first linear channel 21 located on the front wall 121 of the body 10 of the cage, the side teeth 31 of the anchor rod 30 radially extend into the front hole section of the mounting hole 17 corresponding to the first linear channel 21, and after the anchor rod 30 enters the lead-in straight section 221 of the second linear channel 22 located on the rear side of the body 10 of the cage from the entry port 2211 of the second linear channel 22 located on the rear wall 122 of the body of the cage, the side teeth 31 of the anchor rod 30 radially extend into the rear hole section of the mounting hole 17 corresponding to the second linear channel 22. As shown in Figure 6 , so that each mounting hole 17 corresponds to at least one first linear channel 21 and one second linear channel 22, so that the front hole section and the rear hole section of each mounting hole 17 are respectively through the lead-in straight section 211 of the first linear channel 21 and the lead-in straight section 221 of the second linear channel 22.

[0053] As shown in Figure 9 and Figure 11 and in combination with Figure 3 , Figure 6 and Figure 7As shown, the actuation mechanism 40 is disposed in the mounting hole 17. Each mounting hole 17 is provided with an actuation mechanism 40. Specifically, the actuation mechanism 40 includes an operating head 41 and an actuation body. The actuation body includes a rotating rod 42 and two drive sleeves 43. The rotating rod 42 passes through the mounting hole 17. The operating head 41 is fixed to the front end of the rotating rod 42 and exposed on the front side of the fusion device body 10 without protruding from the front wall 121 of the fusion device body 10. The operating head 41 is provided with a screwing operation part such as an internal hexagon countersunk groove so that a screwing tool can apply screwing to the operating head 41 from the front side of the vertebra 1000 to drive the rotating rod 42 to rotate. Two drive sleeves 43 are coaxially sleeved on the rotating rod 42 and are keyed together to restrict their rotation relative to the rotating rod 42, thus allowing them to rotate synchronously with the rotating rod 42. The two drive sleeves 43 are axially spaced apart, and are respectively located at axial positions corresponding to the inlet straight section 211 of the first linear channel 21 and the inlet straight section 221 of the second linear channel 22. Since the drive sleeve 43 corresponding to the inlet straight section 211 of the first linear channel 21 is closer to the front wall 121 of the fusion body 10, it can be called the front drive sleeve 431. Since the drive sleeve 43 corresponding to the inlet straight section 221 of the second linear channel 22 is closer to the rear wall 122 of the fusion body 10, it can be called the rear drive sleeve 432. Helical grooves 433 are formed on the outer circumferential surface of both drive sleeves 43, and the helical directions of the helical grooves 433 on the two drive sleeves 43 are opposite. Figure 6 As shown, after the two anchor rods 30, in a straight state, extend from the front wall 121 and rear wall 122 of the fusion body 10 through the inlet port into the guide straight section 211 of the first linear channel 21 and the guide straight section 221 of the second linear channel 22, respectively, the side teeth 31 on the two anchor rods 30 that extend radially into the mounting holes 17 engage with the helical tooth grooves 433 on the front drive sleeve 431 and the rear drive sleeve 432 of the rotating rod 42, respectively. Thus, as... Figure 7 As shown, before the fusion device body 10 is placed in the intervertebral space, the front drive sleeve 431 and the rear drive sleeve 432 are rotated synchronously by turning the operating head 41. The spiral groove 433 on the drive sleeve 43 meshes with the side teeth 31 of the anchor rod 30, driving the corresponding anchor rod 30 to advance along the linear channel. When the head section of the anchor rod 30 is driven and passes through the transition section of the linear channel, the transition section forces the anchor rod 30 to elastically deform and turn into the straight section leading out of the linear channel, thereby achieving the pre-positioning of the anchor rod 30 in the fusion device body 10; as Figures 11 to 13As shown, after the fusion device body 10 is placed in the predetermined position of the intervertebral space, the driving sleeve 43 continues to drive the anchor rod 30 by continuing to rotate the operation head 41, and the head section of the anchor rod 30 is inserted into the vertebra 1000 through the end plate 1001 from the discharge port 2121 of the end face 11 of the fusion device body 10, that is, the anchor rod 30 in the first linear channel 21 is driven by the front driving sleeve 431 to extend obliquely from the rear side area of the end face 11 of the fusion device body 10, and the anchor rod 30 in the second linear channel 22 is driven by the rear driving sleeve 432 to extend obliquely from the front side area of the end face 11 of the fusion device body 10. In this way, the four anchor rods 30 are driven by the actuating mechanism 40 described above to enter the two first linear channels 21 and the two second linear channels 22 before the fusion device is placed in the intervertebral space, and the four anchor rods 30 are respectively inserted into the two vertebrae 1000 from the front side area and the rear side area of the two end faces 11 after the fusion device is placed in the intervertebral space, so as to realize the anchoring of the fusion device body 10 and the two vertebrae 1000.

[0054] It should be noted that the rear side section of each linear channel, including the transition section and the leading straight section, extends towards the end face 11 of the fusion device body 10 while also extending away from the mounting hole 17 in the radial direction to avoid interference between the anchor rod 30 and the symmetrical driving sleeve 43, for example, to avoid interference between the anchor rod 30 in the first linear channel 21 and the driving sleeve 43 for driving the anchor rod 30 in the second linear channel 22, and to avoid interference between the anchor rod 30 in the second linear channel 22 and the driving sleeve 43 for driving the anchor rod 30 in the first linear channel 21.

[0055] The above intervertebral fusion device provided by the present application has at least the following advantages: 1. In the stability of postoperative anchoring: 1) because the front and rear regions of each end face 11 of the fusion device body 10 extend two anchor rods 30 for insertion into the vertebra 1000, so that each end face 11 of the fusion device body 10 has two anchor points in the front and rear directions between the end face 11 and the end plate 1001, which can effectively prevent the end face 11 of the fusion device body 10 and the end plate 1001 of the vertebra 1000 from separating with the patient's pitch action, thereby improving the stability of anchoring; 2) because the anchor rod 30 extends out of the end face 11 of the fusion device body 10 under the guidance of the linear channel leading straight line segment, so during the process of the anchor rod 30 extending out of the end face 11 of the fusion device body 10 and inserting into the vertebra 1000, the insertion direction of the anchor rod 30 does not change, so the cross section of the insertion hole is not much larger than the cross section of the anchor rod 30, which not only increases the firmness of the combination between the anchor rod 30 and the vertebra 1000 but also reduces the damage of the anchor rod to the bone body of the vertebra 1000; 3) the side teeth 31 arranged on the anchor rod 30 and arranged along the extension direction not only participate in driving the anchor rod 30, but also enter the vertebra 1000 after the anchor rod 30 is inserted into the vertebra 1000. After the operation, the new bone growing in the insertion hole enters the tooth groove between the side teeth 31, which significantly increases the combination ability of the anchor rod 30 and the vertebra 1000, preventing the anchor rod 30 from withdrawing from the vertebra 1000.

[0056] 2. In the convenience of intraoperative operation and the balance of stress: 1) only by using the operating instrument to screw the operation head 41 of the actuating mechanism 40 on the front side of the vertebra 1000 through the anterior approach, four anchor rods 30 can be extended from the front and rear regions of the two end faces 11 of the fusion device body 10 and inserted into the vertebra 1000; 2) by synchronously tilting the anchor rod 30 from the rear region of each end face 11 of the fusion device body 10 to extend backward and from the front region to extend forward, the stress on the fusion device body 10 in the front and rear directions is balanced, thereby to some extent inhibiting the displacement of the fusion device body 10 during the operation.

[0057] 3. The rationality of structural configuration: by configuring the side teeth 31 on the anchor rod 30 as the anchoring element for insertion into the vertebra 1000, the anchor rod 30 utilizes its own structure to participate in transmission, thereby avoiding the need to separately add transmission components to drive the anchor rod 30, thereby simplifying the structure, and the side teeth 31 as the structure participating in transmission also serve to enhance the combination ability of the anchor rod 30 and the vertebra 1000 after the operation.

[0058] The anchor rod 30 is made of titanium alloy material, for example, the anchor rod 30 is made of Ti-6Al-4V titanium alloy material, and the side teeth 31 on the anchor rod 30 are obtained by cutting. Preferably, side teeth 31 are machined on both opposite sides of the anchor rod 30 (not shown in the figure) to further enhance the combination ability of the anchor rod 30 and the vertebra 1000 after the anchor rod 30 is inserted into the vertebra 1000.

[0059] In some preferred structures, as shown in Figures 3 to 5 the cross section of the anchor rod 30 is configured as a rhombus, preferably, the edges of the anchor rod 30 are blunted by machining chamfers, the cross section of the linear channel is also configured as a rhombus adapted to the anchor rod 30, and one edge of the linear channel is radially through the mounting hole 17, the side teeth 31 on the anchor rod 30 are opened on the edges thereof, thus, the edge of the anchor rod 30 with the side teeth 31 radially enters the mounting hole 17 and engages with the driving sleeve 43. Configuring the cross section of the anchor rod 30 and the linear channel as a rhombus can avoid the anchor rod 30 from being twisted during being pushed and the side teeth 31 from failing to engage with the helical tooth groove 433 on the driving sleeve 43 due to the twisting of the anchor rod 30, opening the side teeth 31 on the edges of the anchor rod 30 and making the edges radially extend into the mounting hole 17 can increase the amount of the anchor rod 30 radially extending into the mounting hole 17, thus the depth of the side teeth 31 can be configured deeper, which is beneficial to improve the engagement effect with the driving sleeve 43. In addition, the anchor rod 30 with a rhombic cross section can be more smoothly inserted into the vertebra 1000.

[0060] In some preferred structures, as shown in Figure 7 and Figure 11 a first limiting step 32 is machined on the anchor rod 30 towards the head thereof, a second limiting step is machined on the linear channel corresponding to the anchor rod 30 in the opposite direction of the first limiting step 32, when the anchor rod 30 is pushed to the first limiting step 32 by the engagement of the side teeth 31 with the helical tooth groove 433 of the driving sleeve 43 and is stopped at the second limiting step, the anchor rod 30 is limited to continue to be pushed, thus, the extension amount of the anchor rod 30 out of the end face 11 is limited by the two limiting steps, and the cooperation of the two limiting steps makes the anchor rod 30 fixed with the body 10 of the fusion cage, thereby avoiding the extension amount of the anchor rod 30 being limited by the engagement between the side teeth 31 and the helical insertion groove and the fixation of the anchor rod 30 being implemented. Preferably, the first limiting step 32 is formed on the edge of the anchor rod 30, for example, a chamfer is machined on the rear section of the edge of the anchor rod 30, the starting position of the chamfer forms the first limiting step 32, a chamfer is machined on the rear edge of the linear channel, and the starting position of the chamfer forms the second limiting step.

[0061] In some preferred structures, as shown in Figure 9As shown, each driving sleeve 43 is allowed to move axially relative to the rotating shaft 42, i.e. both the front driving sleeve 431 and the rear driving sleeve 432 are allowed to move axially relative to the rotating shaft 42. For example, the driving sleeve 43 is allowed to move axially by means of the following structure: a spline groove extending axially is formed on the rotating shaft 42, and a spline is formed on the inner wall of the driving sleeve 43, so that the spline cooperates with the spline groove to allow the driving sleeve 43 to move axially. An elastic component 44 is sleeved on the rotating shaft 42 on both sides of each driving sleeve 43 in the axial direction, and the elastic component 44 is used to apply elastic force to the driving sleeve 43, so as to allow the driving sleeve 43 to move axially under elastic damping, i.e. two elastic components 44 are mounted on both sides of the front driving sleeve 431, so as to allow the front driving sleeve 431 to move axially after overcoming the elastic force of the elastic components 44, and two elastic components 44 are mounted on both sides of the rear driving sleeve 432, so as to allow the rear driving sleeve 432 to move axially after overcoming the elastic force of the elastic components 44. Preferably, the middle section of the rotating shaft 42 is provided with a middle limiting shaft 421, and the two ends of the rotating shaft 42 are respectively provided with a front limiting shaft 422 and a rear limiting shaft 423, the elastic components 44 on both sides of the front driving sleeve 431 are respectively stopped between the front driving sleeve 431 and the middle limiting shaft 421 and the front limiting shaft 422, and the elastic components 44 on both sides of the rear driving sleeve 432 are respectively stopped between the rear driving sleeve 432 and the middle limiting shaft 421 and the rear limiting shaft 423. Preferably, a disc spring is selected as the elastic component 44.

[0062] The advantage of allowing the driving sleeve 43 to move axially under certain elastic damping is that, due to machining errors and / or meshing errors, the following problem may occur when driving the extension ends 11 of the anchor rods 30: if a certain anchor rod 30 has reached the corresponding second limiting step due to the first limiting step 32 and cannot be further pushed forward, while the first limiting steps 32 of the remaining anchor rods 30 have not yet reached the corresponding second limiting steps, if the driving sleeve 43 is not allowed to move axially relative to the rotating rod 42, the rotating rod 42 will be restricted from rotating, and thus the first limiting steps 32 of the remaining anchor rods 30 will eventually fail to reach the corresponding second limiting steps, and the remaining anchor rods 30 can only be combined with the cage body 10 by meshing, and the anchor rods 30 will produce micro-movement relative to the cage body 10 due to the meshing gap, thereby causing micro-movement between the cage body 10 and the vertebrae 1000 after the operation; by allowing the driving sleeve 43 to move axially under certain elastic damping, even if a certain anchor rod 30 has reached the corresponding second limiting step due to the first limiting step 32 and cannot be further pushed forward, the rotating rod 42 can still rotate by overcoming the elastic force of the corresponding elastic member 44 due to the driving sleeve 43 used to drive the anchor rod 30 to move axially, thereby driving the remaining anchor rods 30 to continue to push forward so that the first limiting steps eventually reach the corresponding second limiting steps, thereby enabling all anchor rods 30 to be finally fixed to the cage body 10 by the combination of the two step surfaces, avoiding the failure of some anchor rods 30 to be fixed to the cage body 10 due to machining errors or meshing errors.

[0063] The present application provides two driving methods for the four anchor rods 30 to extend from the end surface 11 of the cage body 10.

[0064] The first driving method.

[0065] As Figures 3 to 13As shown, the four anchor rods 30 in each side of the four linear channels of the bone graft window 14 are driven by two actuating mechanisms 40, specifically, two mounting holes 17 are formed in the solid area of each side of the bone graft window 14, the two mounting holes 17 are arranged above and below, and the two actuating mechanisms 40 are respectively installed in the two mounting holes 17; one of the first linear channels 21 and one of the second linear channels 22 are respectively located on both sides of the upper mounting hole 17, and the other first linear channel 21 and the other second linear channel 22 are located in the lower mounting hole 17, by driving the operation head 41 of the actuating mechanism 40 installed in the upper mounting hole 17, the corresponding front drive sleeve 431 and rear drive sleeve 432 synchronously drive two anchor rods 30 to enter the first linear channel 21 and the second linear channel 22 located above and finally extend from the rear side area and the front side area of the upper end surface of the cage body 10, by rotating the operation head 41 of the actuating mechanism 40 installed in the lower mounting hole 17, the corresponding front drive sleeve 431 and rear drive sleeve 432 synchronously drive two anchor rods 30 to enter the first linear channel 21 and the second linear channel 22 located below and finally extend from the rear side area and the front side area of the lower end surface of the cage body 10. In this way, by sequentially rotating the operation heads 41 of the two actuating mechanisms 40, the four anchor rods 30 are sequentially extended from the upper end surface and the lower end surface of the cage body 10 to be inserted into the vertebra 1000. In this way, two actuating mechanisms 40 are required on the left and right sides of the bone graft window 14.

[0066] Second driving mode.

[0067] As Figures 14 to 17As shown, the four anchor rods 30 in the four linear channels on each side of the bone graft window 14 are driven by only one actuating mechanism 40, specifically, only one mounting hole 17 is formed in the solid area on each side of the bone graft window 14, which is substantially equidistant from the upper end face and the lower end face of the fusion cage body 10; two first linear channels 21 in the four linear channels are located on the same side and on one side of the mounting hole 17 (e.g., close to one side of the bone graft window 14), two second linear channels 22 are located on the same side and on the other side of the mounting hole 17 (e.g., close to one side of the side wall 13 of the fusion cage body 10), and the lead-in straight segments 211 of the two first linear channels 21 coincide to form a common segment, while the lead-out straight segments 212 are symmetrically arranged and respectively pass through the upper end face and the lower end face of the fusion cage body 10 to form two branch segments, and the lead-in straight segments 221 of the two second linear channels 22 coincide to form a common segment, while the lead-out straight segments 222 are symmetrically arranged and respectively pass through the upper end face and the lower end face of the fusion cage body 10 to form two branch segments. The two anchor rods 30 are stacked to form an anchor rod pair, so that the two anchor rods 30 in the anchor rod pair are integrally combined at the tail to form a combined segment 33, and the side teeth 31 of the two anchor rods 30 are aligned, so that the two anchor rod pairs are synchronously inserted into the common segments of the first linear channels 21 and the second linear channels 22, respectively, and the aligned side teeth 31 are respectively engaged with the front driving sleeve 431 and the driving sleeve 43, so that the four anchor rods 30 of the two anchor rod pairs are respectively extended from the two end faces 11 of the fusion cage body 10 by rotating the operation head 41 of one actuating mechanism 40. Preferably, the two anchor rods 30 in the anchor rod pair can be obtained by cutting a gap on the rod-shaped blank. Preferably, a wedge surface 34 is cut on the adjacent side edges of the heads of the two anchor rods 30 in the anchor rod pair so as to separate from each other when passing through the bifurcation of the two branch segments and respectively enter the two branch segments.

[0068] The second driving mode has the following advantages: 1. Only one actuating mechanism 40 is needed to drive the four anchor rods 30 by rotating the operation head 41, thereby simplifying the operation.

[0069] 2. By sharing one lead-in straight segment for two linear channels, the amount of material removed from the fusion cage body 10 is reduced, thereby reducing the influence of the mounting hole 17 and the linear channels on the support stiffness and strength of the fusion cage body 10.

[0070] 3. The two anchor rods 30 in the anchor rod pair are integrally combined at the tail, so that the two anchor rods 30 restrict each other at the tail, thereby improving the firmness of the combination between the anchor rods 30 and the fusion cage body 10 after the anchor rods 30 are inserted into the vertebra 1000.

[0071] In some preferred configurations, the mounting hole 17 extends not only to the front wall 121 of the fusion body 10 but also to the rear wall 122 of the fusion body 10. The rear end port of the mounting hole 17 is larger than the front end port of the mounting hole 17. The rotating rod 42, which is equipped with two drive sleeves 43, is inserted into the mounting hole 17 from the rear end port. A ball head is provided at the rear end of the rotating rod 42. After the rotating rod 42 is inserted into the mounting hole 17, an end cap is installed at the rear end of the mounting hole 17. The front end face 11 of the end cap is machined into a spherical surface to cooperate with the ball head, thereby allowing the rotating rod 42 to be driven by the operating head 41 at its front end to rotate. Furthermore, although exemplary embodiments have been described in this invention, their scope includes any and all embodiments based on the invention that have equivalent elements, modifications, omissions, combinations (e.g., schemes involving intersections of various embodiments), adaptations, or alterations. Elements in the claims will be interpreted broadly based on the language used in the claims and are not limited to the examples described in this specification or during the implementation of this application, and such examples will be interpreted as non-exclusive. Therefore, this specification and examples are intended to be considered illustrative only, and the true scope and spirit are indicated by the full scope of the following claims and their equivalents.

[0072] The above description is intended to be illustrative and not restrictive. For example, the above examples (or one or more of them) can be used in combination with each other. Other embodiments may be used by those skilled in the art upon reading the above description. Furthermore, in the above detailed description, various features may be grouped together to simplify the invention. This should not be construed as an intention that a disclosed feature, which is not claimed, is necessary for any claim. Rather, the subject matter of the invention may be less than all the features of the particular disclosed embodiment. Thus, the following claims are incorporated herein by reference as examples or embodiments, wherein each claim is independently considered as a separate embodiment, and these embodiments are contemplated as being possible in various combinations or arrangements. The scope of the invention should be determined by reference to the appended claims and the full scope of their equivalents.

[0073] The above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the present invention. The scope of protection of the present invention is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to the present invention within its spirit and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of the present invention.

Claims

1. An intervertebral cage with an anchoring element built-in, characterized in that, It comprises: a fusion body having two end faces for respectively facing the end plates of two vertebrae, a front wall and a rear wall in the front-rear direction between the two end faces, and two side walls in the left-right direction, and a bone graft window penetrating through the two end faces; each side of the bone graft window in the left-right direction is provided with a linear channel in the fusion body, the linear channel comprises two first linear channels extending from the front wall to the rear and respectively obliquely penetrating to the rear side area of the two end faces, and two second linear channels extending from the rear wall to the front and respectively obliquely penetrating to the front side area of the two end faces; an anchor rod, each of the linear channels is pre-provided with an anchor rod; an actuating mechanism comprising an operating head exposed to the front wall of the fusion body for screwing and an actuating body located in the fusion body for driving the anchor rod, after the fusion body is placed in the intervertebral space, the anchor rod in the first linear channel and the second linear channel is driven by the actuating body to respectively obliquely extend from the rear side area of the end face to the rear and from the front side area of the end face to the front under the guidance of the linear channel where it is located by screwing the operating head, and is inserted into the vertebrae through the end plate.

2. The intervertebral fusion cage with an anchoring element built-in according to claim 1, characterized in that: the fusion body is provided with a mounting hole extending in the front-rear direction; the first linear channel and the second linear channel each have a lead-in straight section corresponding to penetrating the front wall and the rear wall to form an entry port, a lead-out straight section corresponding to penetrating the two end faces to form an exit port 2121 and being inclined relative to the lead-in straight section, and a transition section connecting the lead-in straight section and the lead-out straight section; the lead-in straight section is adjacent to the mounting hole and penetrates radially; the actuating body comprises a rotating rod penetrating the mounting hole and being driven to rotate by the operating head, two driving sleeves being sleeved on the rotating rod and rotating with the rotating rod and being axially spaced apart, the outer circumferential surface of each of the two driving sleeves being provided with a helical tooth groove; the two driving sleeves are respectively located at an axial position corresponding to the lead-in straight section of the first linear channel and the second linear channel; the anchor rod is a straight rod before being placed in the linear channel; at least on the outer circumferential surface of the anchor rod adjacent to the mounting hole, a row of side teeth are arranged in the extension direction of the anchor rod; after the head of the anchor rod is inserted into the lead-in straight section of the linear channel from the entry port of the linear channel, the side teeth of the anchor rod enter the mounting hole radially and mesh with the helical groove of the driving sleeve, thereby the anchor rod is driven by the meshing to move along the linear channel and extend out of the exit port 2121 after sequentially passing through the lead-in straight section, the transition section and the lead-out straight section.

3. The intervertebral cage with anchoring elements built-in according to claim 2, characterized in that, a first limiting step is machined on the anchor rod towards the head, and a second limiting step is machined on the linear channel towards the entry port, the first limiting step limits the extension amount of the anchor rod by resisting the second limiting step and fixes the anchor rod; wherein: each driving sleeve is sleeved on the rotating rod in a manner that can axially move relative to the rotating rod and is limited in rotation; elastic components are sleeved on the rotating rod on both sides in the axial direction of each driving sleeve, the elastic components are used to apply elastic force to the driving sleeve and allow the driving sleeve to axially move relative to the rotating rod against the elastic force.

4. The intervertebral cage with anchoring elements built-in according to claim 2, characterized in that, The anchor body of each side of the bone graft window is provided with two installation holes arranged in upper and lower positions; two actuating mechanisms are correspondingly arranged on the anchor body of each side of the bone graft window, and the actuating bodies of the two actuating mechanisms are respectively installed in the two installation holes; wherein: Two first linear channels and two second linear channels are arranged on the left and right sides of the installation hole in the left-right direction, and the two first linear channels are located on the same side and the two second linear channels are located on the same side; the two driving sleeves on the rotating rod of the actuating body are respectively engaged with the side teeth of the two anchor rods in the two first linear channels and the side teeth of the two anchor rods in the two second linear channels to drive the four anchor rods to respectively extend from the rear side area and the front side area of the two end faces, so that the four anchor rods are driven by one actuating mechanism.

5. The intervertebral fusion cage with anchoring elements built-in according to claim 2, characterized in that, The anchor body of each side of the bone graft window is provided with one installation hole; one actuating mechanism is correspondingly arranged on the anchor body of each side of the bone graft window, and the actuating body of the one actuating mechanism is installed in the one installation hole; Two first linear channels and two second linear channels are arranged on the left and right sides of the installation hole in the left-right direction, and the two first linear channels are located on the same side and the two second linear channels are located on the same side; the two driving sleeves on the rotating rod of the actuating body are respectively engaged with the side teeth of the two anchor rods in the two first linear channels and the side teeth of the two anchor rods in the two second linear channels to drive the four anchor rods to respectively extend from the rear side area and the front side area of the two end faces, so that the four anchor rods are driven by one actuating mechanism.

6. The intervertebral fusion cage with anchor elements according to claim 5, characterized in that, The lead-in straight line segments of the two first linear channels are coincided and the lead-in straight line segments of the two second linear channels are coincided to form a common segment of the linear channels, so that the lead-out straight line segments of the two first linear channels and the lead-out straight line segments of the two first linear channels form two branch segments separated by a transition segment; The two anchor rods are stacked to form an anchor rod pair, the two anchor rods in the anchor rod pair are integrally combined at the tail portion to form a combined segment, and the side teeth of the two anchor rods are aligned, so that the anchor rod pair is synchronously inserted into the common segment of the linear channels so that the aligned side teeth are engaged with the driving sleeves, and thus the anchor rod pair is driven by the driving sleeves and the two anchor rods thereof extend from the two end faces through the branch segments.

7. The intervertebral fusion cage with anchoring elements built-in according to claim 2, characterized in that, The cross section of the anchor rod is a rhombus, and the cross section of the linear channel is a rhombus matched with the anchor rod; wherein: The edges of the linear channel and the installation hole are radially penetrated, and the side teeth are provided on the edges of the anchor rod.

8. The intervertebral cage with anchoring elements built-in according to claim 7, characterized in that, The opposite two edges of the anchor rod are provided with side teeth.

9. The intervertebral fusion cage with anchoring elements built-in according to claim 2, characterized in that, The side teeth are straight trapezoidal teeth, the straight tooth wall of the straight trapezoidal teeth faces the tail portion of the anchor rod, and the inclined tooth wall of the straight trapezoidal teeth faces the head portion of the anchor rod.

10. The intervertebral fusion cage with anchoring elements built-in according to claim 7, characterized in that, The anchor rod has opposite acute angle edges and obtuse angle edges, and the side teeth are arranged on the acute angle edges.

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