A spinal intervertebral fusion device

Abstract

The present application relates to the technical field of intervertebral bone grafting and fusion, and in particular to a spinal intervertebral fusion device, which includes a device body and bone screws, wherein the materials of the device body and the bone screws are all cortical bones of allogeneic bones, the device body has a main body front, a main body side, a main body back, a main body top and a main body bottom, and the device body is provided with two channels that match the bone screws, one of the channels connects the main body back and the main body top, and the other connects the main body back and the main body top and bottom, and the bone screws are arranged at the channels. The present application has the effect of increasing the biocompatibility of materials and improving the recovery speed of patients.

Description

Technical Field

[0001] The present application relates to the technical field of intervertebral bone grafting and fusion, and in particular to a spinal intervertebral fusion device. Background Art

[0002] Generally, a spinal intervertebral fusion device is inserted between the vertebrae from which the intervertebral disc has been removed, thereby serving as an artificial prosthesis to restore and maintain the interval between two adjacent vertebrae. Currently, most spinal intervertebral fusion devices on the market are made of a combination of metal and non-metal. Metal materials have strong mechanical properties but are weak in biocompatibility. Summary of the invention

[0003] In order to increase the biocompatibility of materials and improve the recovery speed of patients, the present application provides a spinal intervertebral fusion device.

[0004] The present application provides a spinal intervertebral fusion device that adopts the following technical solution:

[0005] A spinal intervertebral fusion device comprises a fusion device body and bone screws, wherein the materials of the fusion device body and the bone screws are both cortical bones of allogeneic bones, the fusion device body has a main body front surface, a main body side surface, a main body back surface, a main body top surface and a main body bottom surface, and the fusion device body is provided with two channels that cooperate with the bone screws, one of the channels connects the main body back surface and the main body top surface, and the other connects the main body back surface and the main body top surface bottom surface, and the bone screws are arranged at the channels.

[0006] By adopting the above technical solution, the fusion device body is used to be inserted between the two vertebrae of the patient's affected part, and the two channels are used to guide the bone screws, so that the two bone screws are respectively nailed into the cancellous bone of the cones of the two vertebrae on the upper and lower sides of the fusion device body, thereby fixing the fusion device body between the two vertebrae of the affected part. Using the cortical bone of the allogeneic bone as the material of the fusion device body and the bone screw can increase the biocompatibility of the implant, so that the fusion device body and the bone screw can be combined with the patient's affected part, thereby accelerating the recovery speed.

[0007] Optionally, the bone screw is constructed as a quarter arc, and the bone screw has a cutting end, the cutting end is provided with a cutting edge, and the cutting edge is arranged along the radial direction of the quarter arc.

[0008] By adopting the above technical solution, the process of driving the bone screw into the vertebra is a process of rotating around the central axis of the circle where the arc is located. The cutting blade arranged radially can ensure that during the driving process of the bone screw, a corner of the cutting blade contacts the cancellous bone first, thereby reducing the force area and facilitating driving the bone screw into the vertebra.

[0009] Optionally, the plane where the channel is located is perpendicular to the horizontal plane.

[0010] By adopting the above technical solution, the process of driving the bone screw into the vertebra is a process of rotating around the central axis of the circle where the arc is located. The plane where the channel is located is perpendicular to the horizontal plane, which can ensure that during the driving process of the bone screw, the cutting direction of the cutting blade conforms to the extension direction of the cancellous bone trabeculae, thereby reducing the number of severed bone trabeculae and reducing cutting resistance.

[0011] Optionally, the orientation of the fibers in the bone screw is parallel to the direction of a line connecting the head and tail ends of the bone screw.

[0012] By adopting the above technical solution, when making the bone screw, the internal fibers of the bone screw are arranged along the connecting line between the head and tail ends of the bone screw, which can increase the structural strength of the bone screw, enable it to bear torque, and play a role in fixing two adjacent vertebrae and the fusion device body.

[0013] Optionally, the bone screw has a positioning end, which is located at an end of the bone screw away from the cutting end, a limiting block is provided on one side of the positioning end, and a limiting groove matching the limiting block is provided at one end of the channel close to the back side of the main body.

[0014] By adopting the above technical solution, through the cooperation between the limit block and the limit groove, it is possible to prevent the bone screw from being inserted too deeply, so that the part of the bone screw nailed into the vertebra and the part staying in the fusion device body each account for 50%±3% of the bone screw, so that the fusion device body can stay between the two vertebrae and the forces of the two vertebrae on the fusion device body remain relatively balanced.

[0015] Optionally, the main body top surface and the main body bottom surface are rectangular ring structures.

[0016] By adopting the above technical solution, the remaining part of the annular structure can facilitate the bone growth of the patient's affected part and be compatible with the implanted fusion device body and bone screws.

[0017] Optionally, the top surface of the main body and the bottom surface of the main body are set at an angle and are symmetrically arranged relative to a horizontal plane. The side where the top surface of the main body and the bottom surface of the main body are close to each other is connected to the front surface of the main body, and the side where the top surface of the main body and the bottom surface of the main body are far away from each other is connected to the back surface of the main body. The front surface of the main body, the side surface of the main body and the back surface of the main body are all arranged perpendicular to the horizontal plane.

[0018] By adopting the above technical solution, the inclined top surface and bottom surface of the main body can make the fusion device main body appear thinner as it is closer to the front side of the main body and thicker as it is closer to the back side of the main body, thereby making it easier for the physician to insert the fusion device main body between the two vertebrae of the patient's affected part.

[0019] Optionally, a docking groove and a communication hole are further provided on the back side of the main body, the docking groove and the communication hole are coaxially arranged, the communication hole passes through the back side of the main body, the docking groove is used to install a docking block, the docking block includes a docking body, an extension frame, a first locking portion and a second locking portion, the docking body is provided with a threaded hole, the extension frame is fixedly connected to the docking body, the first locking portion is used to abut against a side of the back side of the main body close to the front side of the main body, the second locking portion is at least partially located at an end of the channel close to the back side of the main body, the first locking portion is connected to the docking body through a first connecting piece, and the second locking portion is connected to a side of the extension frame away from the docking body through a second connecting piece.

[0020] By adopting the above technical solution, the docking body can be inserted into the docking groove, so that the extension frame and the end of the first connecting piece away from the docking body can penetrate into the center position of the fusion device body through the communication hole. The first locking portion can abut against the side of the back of the body close to the front of the body under the action of the first connecting piece, so that the docking block is fixed in the docking groove, and the second locking portion can partially block the end of the channel close to the back of the body, thereby preventing the bone screw from failing to be fixed to the patient's vertebrae after being nailed in, causing the bone screw to slip out.

[0021] Optionally, a plurality of anti-slip parts are provided on the top surface of the main body and the bottom surface of the main body, and the anti-slip parts have an anti-slip top surface, an anti-slip vertical surface, an anti-slip side surface and an anti-slip bottom surface, the anti-slip vertical surface and the anti-slip side surface are perpendicular to each other and are both perpendicular to the anti-slip bottom surface, the angle between the anti-slip top surface and the anti-slip bottom surface is the same as the angle between the top surface of the main body and the horizontal plane, and the anti-slip bottom surfaces of the plurality of anti-slip parts are respectively connected to the top surface of the main body or the bottom surface of the main body.

[0022] By adopting the above technical solution, the anti-slip top surface having the same angle as the top surface or the bottom surface of the main body can be easily inserted. After insertion, the anti-slip vertical surface perpendicular to the anti-slip bottom surface can be parallel to the trabeculae of the vertebrae on both sides of the fusion device body, thereby increasing the friction between the fusion device and the vertebrae on both sides thereof, and avoiding sliding and separation between the fusion device body and the vertebrae before the bone screws are driven in.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. It can increase the biocompatibility of materials and improve the recovery speed of patients;

[0025] 2. The installation process is convenient, which makes it easy for the doctor to insert the fusion device body into the vertebrae on both sides of the patient, and also makes it easy for the doctor to drive the bone screws through the channel into the vertebrae on both sides of the fusion device body after the fusion device is inserted. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1is a schematic structural diagram of a spinal intervertebral fusion device according to an embodiment of the present application;

[0027] Figure 2 is a schematic structural diagram of a fusion device body according to an embodiment of the present application;

[0028] Figure 3 is a top view of a spinal intervertebral fusion device according to an embodiment of the present application;

[0029] Figure 4 yes Figure 3 A cross-sectional view of the middle AA position;

[0030] Figure 5 yes Figure 3 Schematic cross-sectional view of the middle BB position;

[0031] Figure 6 is a schematic diagram of the structure of a bone nail according to an embodiment of the present application;

[0032] Figure 7 is a schematic diagram of the internal fiber orientation of the bone nail according to an embodiment of the present application;

[0033] Figure 8 It is a schematic diagram of the structure of the docking block of an embodiment of the present application.

[0034] Explanation of the reference numerals: 1- fusion device body; 101- front of the body; 102- side of the body; 103- back of the body; 104- top of the body; 105- bottom of the body; 106- channel; 1061- limiting groove; 107- anti-slip part; 1071- anti-slip top surface; 1072- anti-slip vertical surface; 1073- anti-slip side; 108- connection groove; 109- communication hole; 2- bone screw; 201- cutting blade; 202- limiting block; 3- connection block; 301- connection body; 302- extension frame; 303- first locking part; 304- first connecting plate; 305- second locking part; 306- second connecting plate; 307- threaded hole. DETAILED DESCRIPTION

[0035] The following is combined with Figure 1-8 This application is described in further detail.

[0036] The embodiment of the present application discloses a spinal intervertebral fusion device.

[0037] like Figure 1 and Figure 2As shown, the spinal intervertebral fusion device includes a fusion device body 1 and a bone screw 2, and the materials of the fusion device body 1 and the bone screw 2 are all cortical bones of allogeneic bones. The diameter of the bone screw is 1-3mm. The fusion device body 1 has a main body front 101, a main body side 102, a main body back 103, a main body top 104 and a main body bottom 105, and the thickness of the main body front 101, the main body side 102, the main body back 103, the main body top 104 and the main body bottom 105 is maintained at 3-5mm.

[0038] like Figure 3 , Figure 4 and Figure 5 As shown, two channels 106 cooperating with the bone screws 2 are provided on the fusion device body 1, one of the channels 106 connects the back surface 103 of the body and the top surface 104 of the body, and the other connects the back surface 103 of the body and the bottom surface of the top surface 104 of the body, and the bone screws 2 are arranged at the channels 106.

[0039] The fusion device body 1 is used to be inserted between two adjacent vertebrae of the patient's affected part. The two channels 106 are intended to guide the installation of the bone screws 2, ensuring that the two bone screws 2 can be respectively nailed into the cancellous bone of the cone of the corresponding vertebrae on the upper and lower sides of the fusion device body 1. Thereby, the fusion device body 1 can be stably fixed between the two vertebrae of the patient's affected part. At the same time, in order to increase the biocompatibility of the bone screws, the cortical bone of the allogeneic bone is used as the manufacturing material of the fusion device body 1 and the bone screw 2. This material enables the fusion device body 1 and the bone screw 2 to better integrate with the patient's affected part, thereby effectively improving the patient's recovery speed.

[0040] The channel 106 is matched with the bone screw 2, that is, the structure of the channel 106 is the same as the shape of the bone screw 2, and the shape of the bone screw 2 should be constructed to be able to be inserted into the channel 106. The simplest shape of the bone screw 2 is a straight screw, and the channel 106 is a straight through hole set at an angle to the horizontal direction. The straight screw is inserted obliquely into the vertebra of the patient's affected part through the straight through hole, thereby playing a role in fixing the fusion device body 1 and the vertebra.

[0041] like Figure 1 and Figure 6 As shown, the straight bone screw 2 is obliquely inserted into the vertebra of the patient's affected part, which proves that the straight bone screw 2 will be affected by the trabeculae of the cancellous bone during the process of being nailed into the cancellous bone of the cone. In order to reduce the influence of the trabeculae on the bone screw 2, the bone screw 2 is constructed as a quarter arc, and the bone screw 2 has a cutting end, and the cutting end is provided with a cutting blade 201, and the cutting blade 201 is arranged along the radial direction of the quarter arc. At the same time, the plane where the channel 106 is located is perpendicular to the horizontal plane.

[0042] After the bone screw 2 is constructed into a quarter arc shape, the process of driving the bone screw 2 into the vertebra is the process of rotating around the central axis of the circle where the arc is located. The radial arrangement of the cutting blade 201 along the quarter arc can ensure that during the driving process of the bone screw 2, one corner of the cutting blade 201 preferentially contacts the spongy bone, thereby reducing the force-bearing area and facilitating the driving of the bone screw 2 into the vertebra. Since the arrangement of trabeculae is consistent with the direction of the pressure and tension borne by the bone, the arrangement of the spongy bone trabeculae in the cone is mostly parallel to the longitudinal extension of the longitudinal ligament. The plane where the channel 106 is located is perpendicular to the horizontal plane to ensure that during the driving process of the bone screw 2, the cutting direction of the cutting blade 201 conforms to the extension direction of the spongy bone trabeculae, reducing the number of cut trabeculae and reducing the cutting resistance.

[0043] like Figure 7 As shown, in order to increase the strength of the bone screw 2, the direction of the fibers in the bone screw 2 is parallel to the direction of the line connecting the head and tail ends of the bone screw 2. When manufacturing the bone screw 2, the fibers inside the bone screw 2 are arranged along the direction of the line connecting the head and tail ends of the bone screw 2, which can increase the structural strength of the bone screw 2, enable it to bear torque, play a role in fixing two adjacent vertebrae and the fusion device body 1, and reduce the occurrence of fracture of the bone screw 2 due to force.

[0044] like Figure 2 and Figure 6 As shown, the bone screw 2 has a positioning end, which is located at the end of the bone screw 2 away from the cutting end. A limiting block 202 is provided on one side of the positioning end, and a limiting groove 1061 matching the limiting block 202 is provided at one end of the channel 106 close to the back side 103 of the main body.

[0045] In the medical field, stability is of vital importance for spinal fusion surgery. The cooperation between the stopper block 202 and the stopper groove 1061 can ensure the accuracy of the implantation depth of the bone screw 2, so that the portion of the bone screw 2 nailed into the vertebra and the portion remaining in the fusion device body 1 each account for 50%±3% of the bone screw 2, thereby ensuring the balanced distribution of the bone screw 2, so that the forces of the two vertebrae on the fusion device body 1 remain relatively balanced, and the effect of spinal fusion is further improved.

[0046] like Figure 1 and Figure 2 As shown, the main body top surface 104 and the main body bottom surface 105 are rectangular ring structures. The remaining part of the ring structure can facilitate the bone growth of the patient's affected part and is compatible with the implanted fusion device body 1 and bone screw 2.

[0047] like Figure 1 and Figure 2As shown, in order to facilitate the insertion of the fusion device body 1 into the patient's affected part and to facilitate the top surface 104 and the bottom surface 105 of the fusion device body to fit the bone surfaces of the vertebrae on both sides, the top surface 104 and the bottom surface 105 of the body are arranged at an angle and are symmetrically arranged relative to the horizontal plane.

[0048] In the medical field, for spinal fusion surgery, the two adjacent vertebrae after fusion are fixed to each other, so before the spinal fusion surgery is performed, it is necessary to determine the positional relationship between the two adjacent vertebrae of the patient's affected part. Similarly, the angle between the main body top surface 104 and the main body bottom surface 105 needs to be determined based on the positional relationship between the two adjacent vertebrae of the patient's affected part that has been determined. According to the angle between the bone surfaces of the two adjacent vertebrae of the patient's affected part, the angle between the main body top surface 104 and the main body bottom surface 105 is determined, so that the main body top surface 104 and the main body bottom surface 105 can fit closely with the bone surfaces of the two adjacent vertebrae of the patient's affected part. The side where the main body top surface 104 and the main body bottom surface 105 are close to each other is connected to the main body front surface 101, and the side where the main body top surface 104 and the main body bottom surface 105 are far away from each other is connected to the main body back surface 103. The main body front surface 101, the main body side surface 102 and the main body back surface 103 are all arranged perpendicular to the horizontal plane.

[0049] The inclined top surface 104 and bottom surface 105 of the main body enable the fusion device main body 1 to present a gradually thinning thickness near the main body front surface 101 and gradually thickening thickness near the main body back surface 103. This design helps the physician to more conveniently insert the main body front surface 101 of the fusion device main body 1 accurately between the two vertebrae of the patient's affected part, which not only ensures the accuracy of the operation but also improves the efficiency of the operation. At the same time, it can also fit closely with the bone surfaces of the two adjacent vertebrae of the patient's affected part, which is beneficial to the wound healing of the patient after surgery.

[0050] like Figure 1 and Figure 2 As shown, in order to reduce the damage of the fusion device body 1 to the patient, the connection between the main body side 102 and the main body front 101 and the main body side 102 and the main body back 103 of the fusion device body 1 are both provided with rounded corners.

[0051] like Figure 1 and Figure 2As shown, since the fusion device body 1 may slide and disengage after being inserted between the vertebrae, in order to prevent the fusion device body 1 from sliding and disengaging during the process of nailing the bone screws 2, a plurality of anti-slip parts 107 are provided on the main body top surface 104 and the main body bottom surface 105. The anti-slip part 107 has an anti-slip top surface 1071, an anti-slip vertical surface 1072, an anti-slip side surface 1073 and an anti-slip bottom surface. The anti-slip vertical surface 1072 and the anti-slip side surface 1073 are perpendicular to each other and are both perpendicular to the anti-slip bottom surface. The angle between the anti-slip top surface 1071 and the anti-slip bottom surface is the same as the angle between the main body top surface 104 and the horizontal plane. The anti-slip bottom surfaces of the plurality of anti-slip parts 107 are respectively connected to the main body top surface 104 or the main body bottom surface 105.

[0052] The anti-skid top surface 1071 of the anti-skid piece 107 maintains the same angle with the main body top surface 104 or the main body bottom surface 105, so as to facilitate the smooth insertion of the fusion device main body 1. After the fusion device main body 1 is inserted, the anti-skid vertical surface 1072 of the anti-skid piece 107 is parallel to the trabeculae of the vertebrae on both sides, effectively increasing the friction between the fusion device main body 1 and the vertebrae. This prevents the fusion device main body 1 from sliding or detaching from the vertebrae before the bone screw 2 is driven in, thus ensuring the safety and stability of the surgical process.

[0053] like Figure 1 , Figure 2 and Figure 8 As shown, for the convenience of manipulation, a docking groove 108 and a communication hole 109 are further provided on the back side 103 of the main body. The docking groove 108 and the communication hole 109 are coaxially arranged, and the communication hole 109 passes through the back side 103 of the main body. The docking groove 108 is used to install the docking block 3. The docking block 3 includes a docking body 301, an extension frame 302, a first locking portion 303 and a second locking portion 305. A threaded hole 307 is provided on the docking body 301, and the extension frame 302 is fixedly connected to the docking body 301. The first locking portion 303 is used to abut against a side of the back side 103 of the main body close to the front side 101 of the main body, and the second locking portion 305 is at least partially located at an end of the channel 106 close to the back side 103 of the main body. The first locking portion 303 is connected to the docking body 301 through a first connecting piece 304, and the second locking portion 305 is connected to a side of the extension frame 302 away from the docking body 301 through a second connecting piece 306.

[0054] After the docking body 301 is inserted into the docking slot 108, the extension frame 302 and the end of the first connecting piece 304 away from the docking body 301 can penetrate into the center of the fusion device body 1 through the communication hole 109. At the same time, the side of the first locking portion 303 close to the back side 103 of the body can be abutted against the side of the back side 103 close to the front side 101 of the body under the action of the first connecting piece 304, so that the docking body 301 is fixed in the docking slot 108. In order to facilitate the insertion of the extension frame 302 and the first connecting piece 304 into the communication hole 109, the thickness of the first locking portion 303 can be inversely proportional to the distance between it and the docking body 301, so that the first locking portion 303 is in a state where the thickness decreases the farther away from the docking body 301. At the same time, after the docking body 301 is inserted into the docking groove 108, the second locking portion 305 can partially block the end of the channel 106 close to the back side 103 of the body, thereby preventing the bone screw 2 from being not fixed to the patient's vertebra after being screwed in, causing the bone screw 2 to be pulled out.

[0055] The implementation principle of a spinal intervertebral fusion device in the embodiment of the present application is:

[0056] The patient's affected part is diagnosed, and the positional relationship of two adjacent vertebrae is designed according to the condition of the patient's affected part. The angle between the main body top surface 104 and the main body bottom surface 105 is determined according to the angle between the bone surfaces of the two adjacent vertebrae of the patient's affected part, and the fusion device main body 1 is produced and processed using the cortical bone of the allogeneic bone as the raw material.

[0057] Before inserting the spinal intervertebral fusion device into two adjacent vertebrae of the patient's affected part, the intervertebral disc between the two adjacent vertebrae of the affected part needs to be removed first, or a hole needs to be drilled and expanded at the intervertebral disc by a medical drill until it can accommodate the intervertebral fusion device body 1.

[0058] Then, the docking block 3 is inserted into the docking groove 108 , and the fusion device body 1 is threadedly connected with the bolts on the medical robot arm through the threaded holes 307 on the docking body 301 of the docking block 3 .

[0059] The fusion device body 1 is inserted between two adjacent vertebrae of the patient's affected part by operating the medical robotic arm. Since the fusion device body 1 is symmetrical on both sides, there is no need to pay extra attention to the upper and lower position relationship of the main body top surface 104 or the main body bottom surface 105 during the insertion process. It is only necessary to make the main body top surface 104 or the main body bottom surface 105 match the bone surface of the cone of the two adjacent vertebrae of the patient's affected part.

[0060] Then, the cut end of the bone screw 2 is inserted into the channel 106. Since the bone screw 2 and the channel 106 are both quarter-circular arcs, the insertion angle is unique and there is no need to worry about rotation during the insertion process, resulting in the limit block 202 being unable to cooperate with the limit groove 1061.

[0061] When the insertion is blocked, it means that the cutting edge 201 of the bone screw 2 is in contact with the spongy bone, and the medical robot arm continues to apply force until the limit block 202 matches the limit groove 1061, which means that the bone screw 2 is completely inserted. During the insertion of the bone screw 2, since the cutting edge 201 of the bone screw 2 smoothly transitions with the bone screw 2, the second locking portion 305 at the mouth of the channel 106 will be pushed away. After the bone screw 2 is completely inserted, the second locking portion 305 loses the force applied by the bone screw 2, and thus returns to the mouth of the channel 106 under the action of the second connecting piece 306, blocking the mouth of the channel 106, thereby preventing the patient from suffering from osteoporosis, and the bone trabeculae degenerate and become thinner and unable to apply enough force to the bone screw 2, causing the bone screw 2 to slip out.

[0062] Finally, the bolts on the medical robot arm are removed from the connecting body 301, so that the spinal intervertebral fusion device remains in the patient's body, assisting the patient in fixing two adjacent vertebrae of the affected part and healing them.

[0063] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A spinal intervertebral fusion cage, characterized in that: include: A fusion device body (1) and a bone screw (2), wherein the materials of the fusion device body (1) and the bone screw (2) are all cortical bone of allogeneic bone, the fusion device body (1) has a main body front surface (101), a main body side surface (102), a main body back surface (103), a main body top surface (104) and a main body bottom surface (105), and the fusion device body (1) is provided with two channels (106) matched with the bone screw (2), one of the channels (106) is connected to the main body back surface (103) and the main body top surface (104), and the other is connected to the main body back surface (103) and the bottom surface of the main body top surface (104), and the bone screw (2) is arranged in the channel (106). 06), the bone screw (2) is constructed as a quarter arc, the bone screw (2) has a cutting end, the cutting end is provided with a cutting blade (201), the cutting blade (201) is arranged along the radial direction of the quarter arc, the plane where the channel (106) is located is perpendicular to the horizontal plane, the main body top surface (104) and the main body bottom surface (105) are rectangular ring structures, the main body top surface (104) and the main body bottom surface (105) are arranged at an angle and are symmetrical relative to the horizontal plane, the side of the main body top surface (104) and the main body bottom surface (105) close to each other is connected to the main body front surface (101), the main body top surface (104) and the main body bottom surface (105) are connected to the main body front surface (101), and the main body top surface (104) and the main body bottom surface (105) are connected to the main body front surface (101). The side of the main body (105) that is away from each other is connected to the back side (103) of the main body, the front side (101) of the main body, the side side (102) of the main body and the back side (103) of the main body are all arranged perpendicular to the horizontal plane, and the back side (103) of the main body is also provided with a docking groove (108) and a communication hole (109), the docking groove (108) and the communication hole (109) are coaxially arranged, and the communication hole (109) passes through the back side (103) of the main body, the docking groove (108) is used to install the docking block (3), and the docking block (3) includes a docking body (301), an extension frame (302), a first locking portion (303) and a second locking portion (305), and the docking A threaded hole (307) is provided on the docking body (301); the extension frame (302) is fixedly connected to the docking body (301); the first locking portion (303) is used to abut against a side of the back side (103) of the body close to the front side (101) of the body; the second locking portion (305) is at least partially located at an end of the channel (106) close to the back side (103) of the body; the first locking portion (303) is connected to the docking body (301) through a first connecting piece (304); and the second locking portion (305) is connected to a side of the extension frame (302) away from the docking body (301) through a second connecting piece (306).

2. The spinal intervertebral fusion cage according to claim 1, characterized in that: The orientation of the fibers in the bone screw (2) is parallel to the direction of the line connecting the head and tail ends of the bone screw (2).

3. The spinal intervertebral fusion cage according to claim 1, characterized in that: The bone screw (2) has a positioning end, which is located at an end of the bone screw (2) away from the cutting end, and a limiting block (202) is provided on one side of the positioning end. The channel (106) is provided with a limiting groove (1061) that matches the limiting block (202) at one end close to the back side (103) of the main body.

4. The spinal intervertebral fusion cage according to claim 1, characterized in that: A plurality of anti-skid parts (107) are provided on the main body top surface (104) and the main body bottom surface (105); the anti-skid parts (107) have an anti-skid top surface (1071), an anti-skid vertical surface (1072), an anti-skid side surface (1073) and an anti-skid bottom surface; the anti-skid vertical surface (1072) and the anti-skid side surface (1073) are perpendicular to each other and are perpendicular to the anti-skid bottom surface; the angle between the anti-skid top surface (1071) and the anti-skid bottom surface is the same as the angle between the main body top surface (104) and the horizontal plane; and the anti-skid bottom surfaces of the plurality of anti-skid parts (107) are respectively connected to the main body top surface (104) or the main body bottom surface (105).

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