Artificial cervical intervertebral disc barb fixation device and artificial cervical intervertebral disc prosthesis

Abstract

The present invention provides an artificial cervical intervertebral disc barb fixation device. The device includes a first barb structure and at least one second barb structure arranged on the surface of the first barb structure. The second barb structure includes a fixing piece and a spur. The spur includes a vertically arranged needle and a plurality of groups of barb hooks. In the initial state, the top of the spur is protruding from the top of the fixing piece. A driving assembly is provided inside the fixing piece. When the top of the second barb structure is subjected to pressure, the driving assembly can drive the spur to move toward the outside of the fixing piece and make at least one group of barb hooks located outside the fixing piece. Therefore, after the prosthesis is implanted, under the tension of the tissue structure around the patient's cervical spine and the gravity of the cervical spine and head, the first barb structure and the second barb structure are pressed into the upper and lower vertebrae. Under the action of pressure, the spur moves outward and makes at least one group of barb hooks located outside the fixing piece to penetrate into the bone of the adjacent vertebrae to form barbs, thereby increasing the immediate stability with the bone tissue.

Description

Technical Field

[0001] The present invention relates to the technical field of artificial cervical intervertebral disc prostheses, in particular to an artificial cervical intervertebral disc barb fixing device and an artificial cervical intervertebral disc prosthesis. Background Art

[0002] Cervical spondylosis is an age-related, chronic disease based on intervertebral disc degeneration, and is becoming more common among younger patients due to changes in lifestyle. The huge economic investment required to treat the disease and the resulting loss of labor force also create a serious socioeconomic burden. Currently, artificial cervical disc replacement surgery has achieved satisfactory clinical results. This surgical procedure involves removing the diseased intervertebral disc and inserting a functional artificial cervical disc prosthesis in its original location, maintaining the height of the intervertebral space and preserving the range of motion of the segment. Compared with traditional anterior cervical fusion, its advantages are that it preserves the range of motion of the cervical spine, restores the physiological function of the cervical spine, and is expected to alleviate the degeneration of adjacent segments.

[0003] However, although artificial cervical disc replacement has achieved good clinical results, problems such as prosthesis sinking, loosening and displacement still exist in the early and mid-term results. As an implant, the artificial intervertebral disc prosthesis is similar to other implants in dentistry or orthopedics. Its stability is the key to determining the success of surgical treatment. Implant stability refers to the absence of obvious relative movement between the implant and the bone tissue in space, including immediate stability and long-term stability. The premise is that the implant is tightly connected to the bone tissue. Immediate stability refers to the stability of the implant and the bone in space achieved through mechanical connection immediately and in the early postoperative period. This is related to the design of the implant, the surgical method and the characteristics of the bone. Good immediate stability is an important condition for the implant to achieve long-term stability.

[0004] At present, the immediate stability of artificial cervical intervertebral disc prostheses is mainly achieved through the following methods: vertical ridges, anchor spikes, keels, and reverse "ladders". For artificial cervical intervertebral disc prostheses, the establishment of immediate stability is crucial. If the stability is insufficient, the prosthesis will often shift and dislodge, which may compress the esophagus forward and the spinal nerves backward, resulting in very serious consequences. The Discover and Mobi-C prostheses, among the existing prostheses, have been reported to have the above problems many times. As for the keel design, which currently has better stability, the pursuit of immediate and tight fixation may lead to excessive damage to the vertebral bone, resulting in vertebral splitting (iatrogenic fracture).

[0005] Based on this, there is an urgent need to provide a device that can not excessively destroy the vertebral bone while ensuring that the end plate provides sufficient immediate stability for the prosthesis as a whole. Summary of the Invention

[0006] One objective of the present invention is to provide a barbed fixation device for an artificial cervical intervertebral disc, addressing the technical issues of prior art artificial cervical intervertebral disc prostheses, such as insufficient immediate stability or the need for excessive vertebral bone destruction. The various technical advantages achieved by the preferred technical solutions provided by the present invention are detailed below.

[0007] To achieve the above objectives, the present invention provides the following technical solutions:

[0008] The present invention provides an artificial cervical intervertebral disc barb fixation device, comprising a first barb structure and at least one second barb structure arranged on the surface of the first barb structure.

[0009] The second barb structure includes a fixing member and a thorn, wherein the thorn includes a vertically arranged needle and a plurality of groups of barbed hooks arranged at intervals from top to bottom along the length direction of the needle. In the initial state, the top of the needle protrudes from the top of the fixing member.

[0010] A driving assembly is provided inside the fixing member, and the driving assembly is connected to the bottom of the spur. When the top of the second barb structure is subjected to pressure, the driving assembly can drive the spur to move toward the outside of the fixing member and make at least one group of the barb hooks located outside the fixing member.

[0011] According to a preferred embodiment, the fixing member is a cylindrical structure, a cavity is provided inside the fixing member and along its longitudinal direction to allow the thorn to move up and down, a support plate is provided at the bottom of the needle, and the drive assembly is connected to the support plate.

[0012] According to a preferred embodiment, at least two drive assembly limiting structures are provided inside the fixing member and around the circumference of the support plate;

[0013] The driving assembly includes a sliding member, a locking rod and a tension spring, wherein a first sliding groove is formed on the sliding member, one end of the locking rod is movably connected to the bottom of the driving assembly limiting structure, and the other end can move in the first sliding groove; a first fixed column is provided on the upper part of the driving assembly limiting structure, and a second fixed column is provided on the top of the sliding member, and the two ends of the tension spring are respectively connected between the first fixed column and the second fixed column.

[0014] According to a preferred embodiment, the first slide groove includes a curved groove portion located at the top and a vertical groove portion connected to the curved groove portion, wherein the top of the vertical groove portion is connected to one side of the curved groove portion, the bottom of the vertical groove portion extends vertically downward, and the bottom of the curved groove portion is lower than the top opening of the vertical groove portion.

[0015] According to a preferred embodiment, the driving assembly limiting structure includes a base plate, a limiting plate located on the outside and a slide rail assembly located on the inside, the limiting plate and the slide rail assembly are arranged on the base plate at intervals and form a space therebetween for limiting the tension spring and the sliding member, wherein the slide rail assembly includes a stop member located above and a slide rail located below, and the height of the stop member protruding from the surface of the base plate is greater than the height of the slide rail protruding from the surface of the base plate.

[0016] According to a preferred embodiment, a second sliding groove is provided at a position of the sliding member corresponding to the contact position with the sliding rail, and the second sliding groove can be slidably provided on the sliding rail and moves upward along the sliding rail under the action of the tension spring;

[0017] A fourth sliding groove is provided on the bottom plate and located inside the slide rail, and a slider is provided at the bottom of the sliding member to cooperate with the fourth sliding groove; the width of the slide rail away from the slider is consistent with the space between the limit plate and the slide rail;

[0018] A sliding plate is formed on the inner upper part of the sliding member, a limit block is provided on the top of the sliding plate, a third sliding groove is formed on the bottom plate to allow the sliding plate and the limit block to move, and a space for limiting the support plate is formed between the limit block and the top of the sliding member.

[0019] According to a preferred embodiment, a vertebral connector is formed at the connection between the support plate and the sliding member, the vertebral connector is in the shape of a triangular cone, and an inclined surface consistent with the edge of the vertebral connector is formed on the top of the sliding member facing the support plate, so that the support plate abuts against the top inclined surface of the sliding member through the outer edge of the vertebral connector, and the limit block abuts against the top surface of the vertebral connector.

[0020] According to a preferred embodiment, a limiting hole is provided at the bottom of the base plate, and the bottom of the locking pull rod is movably limited in the limiting hole;

[0021] When the second barb structure is in the initial state, the top of the locking pull rod is limited at the bottom of the curved groove portion, the tension spring is in a stretched state, and the support plate and the barbed hook of the stab are limited in the cavity.

[0022] According to a preferred embodiment, the first barb structure includes a cylindrical barb, a columnar barb with an inclined surface, a conical barb, or a continuous or discontinuous tooth-like barb structure, wherein the bottom of the second barb structure is embedded in the first barb structure and the top of the second barb structure protrudes from the surface of the first barb structure.

[0023] The present invention also provides an artificial cervical intervertebral disc prosthesis, comprising an upper prosthesis plate, a lower prosthesis plate and the artificial cervical intervertebral disc barb fixing device, wherein the artificial cervical intervertebral disc barb fixing device is respectively arranged on the surface of the upper prosthesis plate and the lower prosthesis plate.

[0024] Based on the above technical solution, the artificial cervical intervertebral disc barb fixation device of the present invention has at least the following technical effects:

[0025] The artificial cervical intervertebral disc barb fixation device of the present invention includes a first barb structure and at least one second barb structure arranged on the surface of the first barb structure. The second barb structure includes a fixing piece and a spur. The spur includes a vertically arranged needle and a plurality of groups of barbed hooks arranged at intervals from top to bottom along the length direction of the needle. In the initial state, the top of the needle protrudes from the top of the fixing piece. A driving assembly is provided inside the fixing piece. The driving assembly is connected to the bottom of the spur. Moreover, when the top of the second barb structure is subjected to pressure, the driving assembly can drive the spur to move toward the outside of the fixing piece and make at least one group of the barbed hooks located outside the fixing piece. Therefore, the barb fixing device of the present invention is installed on the upper and lower end plates of the artificial cervical intervertebral disc prosthesis. During cervical spine surgery, medical staff use a special expander to expand the two vertebrae, restore the patient's normal segment, and implant an artificial cervical intervertebral disc prosthesis of corresponding height model with a barb fixing device. Therefore, after the prosthesis is implanted, under the action of the tension of the patient's cervical spine surrounding structural tissues, such as muscle tissue and ligament tissue, and the gravity of the cervical spine and head after standing up, the vertebrae above and below the implanted prosthesis will squeeze the artificial prosthesis in the middle. At this time, the first barb structure and the second barb structure are subjected to pressure and penetrate into the upper and lower vertebrae. At the same time, under the action of pressure, the driving component in the second barb structure will drive the spurs to move outward and make at least one group of barb hooks located outside the fixing piece to penetrate into the bone of the adjacent vertebrae to form barbs, which increases the immediate stability with the bone tissue. At the same time, the barb fixing device of the present invention will not destroy too much vertebral bone. The immediate fixation structure in the prior art does not contain the second barb structure of the present application. Compared with the immediate fixation structure in the prior art, the barb fixation structure of the present invention can reduce the damage range to the vertebral bone in a relatively small range while achieving the same fixation strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1It is a schematic diagram of the three-dimensional structure of the second barb structure in the barb fixing device of the present invention;

[0028] Figure 2 Schematic diagram of the internal structure of the second barb structure in the barb fixing device of the present invention in the initial state;

[0029] Figure 3 is a rear view of a sliding member in the second barb structure of the barb fixing device of the present invention;

[0030] Figure 4 Schematic diagram of the second barb structure in the barb fixing device of the present invention protruding outward under pressure;

[0031] Figure 5 It is a structural schematic diagram of an application mode of the barb fixing device of the present invention.

[0032] In the figure: 1-first barb structure; 2-second barb structure; 3-prosthesis upper plate; 4-prosthesis lower plate; 20-cavity; 21-fixing member; 22-thorn; 221-puncture needle; 222-barb hook; 223-support plate; 230-limiting block; 231-sliding member; 232-locking rod; 233-first slide; 234-second fixing column; 235-first fixing column; 236-tension spring; 237-slide rail; 238-stop member; 239-third slide; 240-vertebral body connecting member; 241-limiting plate; 242-bottom plate; 243-limiting hole; 244-fourth slide; 245-second slide; 246-slider; 2331-bent groove portion; 2332-vertical groove portion. DETAILED DESCRIPTION

[0033] To make the objectives, technical solutions, and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other implementations obtained by those of ordinary skill in the art without inventive effort are within the scope of protection of the present invention.

[0034] In the description of the present invention, it should be noted that, unless otherwise specified, "plurality" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed, or operate in a specific direction, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] It should also be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention depending on the specific circumstances.

[0036] The technical solution of this application is described in detail below with reference to the accompanying drawings.

[0037] Example 1

[0038] This embodiment provides an artificial cervical intervertebral disc barb fixation device, comprising a first barb structure 1 and at least one second barb structure 2 provided on the surface of the first barb structure 1. Preferably, the first barb structure 1 and the second barb structure 2 are integrally provided on the end plate surface of the artificial cervical intervertebral disc prosthesis. Figure 1 and Figure 2 As shown, the second barb structure 2 includes a fixing member 21 and a thorn 22, and the thorn 22 includes a vertically arranged needle 221 and a plurality of groups of barbed hooks 222 spaced from top to bottom along the length direction of the needle 221. In the initial state, the top of the needle 221 is protruding from the top of the fixing member 21. Preferably, the inclination direction of the barbed hook 222 is set along the moving direction of the thorn 22 so that it can only move in the forward direction. A driving assembly is provided inside the fixing member 21, and the driving assembly is connected to the bottom of the thorn 22, and when the top of the second barb structure 2 is subjected to pressure, the driving assembly can drive the thorn 22 to move toward the outside of the fixing member 21 and make at least one group of barbed hooks 222 located outside the fixing member 21. Furthermore, during cervical spine surgery, medical staff use a special expander to expand the two vertebrae, restore the patient's normal segment, and implant an artificial cervical intervertebral disc prosthesis of corresponding height model with a barb fixation device. Therefore, after the prosthesis is implanted, under the tension of the structural tissues around the patient's cervical spine, such as muscle tissue and ligament tissue, and the gravity of the cervical spine and head after standing up, the vertebrae above and below the implanted prosthesis will squeeze the artificial prosthesis in the middle. At this time, the first barb structure and the second barb structure are subjected to pressure and penetrate into the upper and lower vertebrae. At the same time, under the action of pressure, the driving component in the second barb structure will drive the spurs to move outward and make at least one group of barb hooks located outside the fixing piece to penetrate into the bone of the adjacent vertebrae to form barbs, which increases the immediate stability with the bone tissue. At the same time, the barb fixation device of the present invention will not damage too much vertebral bone.

[0039] More preferably, Figure 1 and Figure 2As shown, the fixing member 21 is a cylindrical structure. A cavity 20 is provided inside the fixing member 21 and along its longitudinal direction to allow the thorn 22 to move up and down. A support plate 223 is provided at the bottom of the needle 221, and the drive assembly is connected to the support plate 223. Then, under the action of pressure on the second barb structure, the drive assembly drives the support plate and the thorn to move outward under the pressure to penetrate the bone of the adjacent vertebral body.

[0040] Further preferably, at least two drive assembly limiting structures are provided inside the fixing member 21 and around the circumference of the support plate 223, and the drive assembly limiting structures are used to position the drive assembly. Figure 2 As shown, the drive assembly includes a sliding member 231, a locking rod 232 and a tension spring 236, wherein a first slide groove 233 is formed on the sliding member 231, one end of the locking rod 232 is movably connected to the bottom of the driving assembly limiting structure, and the other end can move in the first slide groove. A first fixed column 235 is provided on the upper part of the driving assembly limiting structure, and a second fixed column 234 is provided on the top of the sliding member 231. The two ends of the tension spring 236 are respectively connected between the first fixed column 235 and the second fixed column 234. Preferably, the second fixed column 234 can slide downward or upward with the sliding member 231. Preferably, the distance between the first fixed column 235 and the second fixed column 234 ensures that the tension spring 236 is always in a stretched state.

[0041] Further preferably, the first slide groove 233 includes a curved groove portion 2331 at the top and a vertical groove portion 2332 communicating with the curved groove portion 2331, wherein the top of the vertical groove portion 2332 is communicated with one side of the curved groove portion 2331, the bottom of the vertical groove portion 2332 extends vertically downward, and the bottom of the curved groove portion 2331 is lower than the top opening of the vertical groove portion 2332. Therefore, when the spur 22 is in the initial state, the end of the locking rod 232 is locked at the bottom of the curved groove portion 2331. When pressure is applied, the spur 22 and the support plate 223 exert downward pressure on the sliding member 231, causing the end of the locking rod to enter the vertical groove portion 2332 through the curved groove portion 2331 and slide downward along the vertical groove portion 2332. At this time, the sliding member 231 is unlocked, and under the action of the tension spring 236, the support plate 223 and the spur 22 move toward the outside of the fixing member.

[0042] Further preferably, the drive assembly limiting structure includes a base plate 242, a limiting plate 241 located on the outside, and a slide rail assembly located on the inside. The limiting plate 241 and the slide rail assembly are spaced apart on the base plate 242, forming a space between them to limit the tension spring 236 and the slider 231. The slide rail assembly includes a stopper 238 located above and a slide rail 237 located below. The stopper 238 protrudes from the base plate surface at a greater height than the slide rail 237 protrudes from the base plate surface. This allows the slider 231 to slide upward along the slide rail 237 and stop against the stopper 238 when it reaches the bottom of the stopper 238, thereby stabilizing the slider, the support plate, and the protrusion. Further preferably, a second slide groove 245 is provided at the contact position of the slider 231 corresponding to the slide rail 237. The second slide groove is slidably disposed on the slide rail 237 and moves upward along the slide rail 237 under the action of the tension spring 236. Preferably, a fourth slide groove 244 is provided on the bottom plate 242, located inside the slide rail 237. A slider 246 is provided at the bottom of the slider 231 to engage with the fourth slide groove 244. The width of the slide rail 237 away from the slider 246 is consistent with the space between the limit plate 241 and the slide rail 237. This allows the left side of the slide rail 237 of the slider 231 to slide in the space between the limit plate 241 and the slide rail 237, while the slider 246 of the slider 231 slides in the fourth slide groove 244.

[0043] Preferably, a sliding plate is formed on the inner upper portion of the sliding member 231, a stopper 230 is provided at the top of the sliding plate, and a third slot 239 is formed on the bottom plate 242 to allow the sliding plate and the stopper 230 to move. A space is formed between the stopper 230 and the top of the sliding member 231 to limit the position of the support plate 223. Furthermore, when the sliding member 231 stops at the bottom of the stopper 238, the stopper 230 can be retained at the top of the third slot 239, thereby providing dual stabilization for the sliding member, the support plate, and the spur.

[0044] Further preferably, a vertebral body connector 240 is formed at the connection between the support plate 223 and the sliding member 231. The vertebral body connector 240 is triangular-conical in shape, and an inclined surface is formed on the top of the sliding member 231 facing the support plate 223, which is consistent with the outer edge of the vertebral body connector 240, so that the support plate 223 abuts against the top inclined surface of the sliding member 231 through the outer edge of the vertebral body connector, and the limit block 230 abuts against the top surface of the vertebral body connector. Preferably, the vertebral body connector 240 is only provided at the connection position between the support plate 223 and the sliding member 231 to prevent the vertebral body connector from obstructing the movement of the spur.

[0045] More preferably, a limiting hole 243 is provided at the bottom of the bottom plate 242, and the bottom of the locking rod 232 is movably limited in the limiting hole 243. When the second barb structure 2 is in the initial state, the top of the locking rod 232 is limited in the curved groove 2331, the tension spring 236 is in a stretched state, and the support plate 223 and the barb hook 222 of the thorn 22 are limited in the cavity 20. Figure 4 As shown, when the second barb structure is subjected to pressure, the end of the locking rod enters the vertical groove portion 2332 through the curved groove portion 2331 and slides downward along the vertical groove portion 2332. At this time, the slider 231 is unlocked, and under the action of the tension spring 236, the support plate 223 and the thorn 22 move toward the outside of the fixing member. Then, the thorn 22 is inserted into the adjacent vertebral body and stably fixed in the vertebral bone tissue by the barbed hook of the thorn 22.

[0046] Preferably, the first barb structure 1 includes cylindrical barbs, columnar barbs with inclined surfaces, conical barbs, or continuous or discontinuous tooth-shaped barb structures. That is, it can be understood that the first barb structure 1 can be a barb structure of any shape on the surface of an existing artificial prosthesis end plate. During installation, the bottom of the second barb structure 2 is embedded in the first barb structure 1 and the top of the second barb structure 2 is protruding from the surface of the first barb structure 1. Figure 5 As shown, in Figure 5 In the embodiment provided, the first barb structure 1 comprises two rows of parallel, continuous, tooth-like barbs disposed on the surface of the prosthetic endplate. A recess for accommodating the second barb structure 2 is disposed on the surface of the first barb structure 1 (which may be a horizontal or inclined surface). The depth of the recess is slightly less than the height of the fixing member 21 of the second barb structure 2, allowing the second barb structure 2 to be embedded within the recess of the first barb structure 1 and allowing the top of the fixing member 21 of the second barb structure 2 to protrude beyond the first barb structure 1. The height by which the fixing member 21 of the second barb structure 2 protrudes beyond the second barb structure 1 ensures that the fixing member 21 of the second barb structure 2 can be subjected to pressure. The number of second barb structures 2 provided can be consistent with the number of tooth-like barbs of the first barb structure 1, i.e., one second barb structure 2 is embedded in each tooth-like barb.

[0047] When in use, the first barb structure 1 and the second barb structure 2 will be placed in the adjacent vertebral body as a whole. At the same time, under the action of pressure, the driving component in the second barb structure will drive the protrusion to move outward and make at least one group of barb hooks located outside the fixing member to penetrate into the bone of the adjacent vertebral body to form barbs, thereby increasing the immediate stability with the bone tissue without destroying too much vertebral bone.

[0048] Example 2

[0049] This embodiment provides an artificial cervical intervertebral disc prosthesis, such as Figure 5As shown, it comprises an upper prosthesis plate 3, a lower prosthesis plate 4 and the barb fixing device described in Example 1. The barb fixing devices for the artificial cervical intervertebral disc are respectively arranged on the surfaces of the upper prosthesis plate 3 and the lower prosthesis plate 4.

[0050] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. An artificial cervical intervertebral disc prosthesis, characterized in that: It comprises a prosthesis upper plate (3), a prosthesis lower plate (4) and an artificial cervical intervertebral disc barb fixing device, wherein the artificial cervical intervertebral disc barb fixing device is respectively arranged on the surface of the prosthesis upper plate (3) and the prosthesis lower plate (4); The artificial cervical intervertebral disc barb fixation device comprises a first barb structure (1) and at least one second barb structure (2) arranged on the surface of the first barb structure (1), the second barb structure (2) comprising a fixing piece (21) and a thorn (22), the thorn (22) comprising a vertically arranged needle (221) and a plurality of groups of barb hooks (222) arranged at intervals from top to bottom along the length direction of the needle (221), and in an initial state, the top of the needle (221) protrudes from the top of the fixing piece (21). A driving assembly is provided inside the fixing member (21), the driving assembly being connected to the bottom of the thorn (22), and when pressure is applied to the top of the second barb structure (2), the driving assembly is capable of driving the thorn (22) to move toward the outside of the fixing member (21) and causing at least one group of the barb hooks (222) to be located outside the fixing member (21); The vertebrae above and below the implanted prosthesis squeeze the artificial prosthesis in the middle, and the first barb structure and the second barb structure are subjected to pressure to penetrate into the upper and lower vertebrae; under the action of pressure, the driving component in the second barb structure drives the protrusion to move outward and makes at least one group of barb hooks located outside the fixing piece to penetrate into the bone of the adjacent vertebrae to form barbs.

2. The artificial cervical intervertebral disc prosthesis according to claim 1, characterized in that: The fixing member (21) is cylindrical in structure. A cavity (20) is provided inside the fixing member (21) and along its longitudinal direction to allow the thorn (22) to move up and down. A support plate (223) is provided at the bottom of the needle (221), and the driving assembly is connected to the support plate (223).

3. The artificial cervical intervertebral disc prosthesis according to claim 2, characterized in that: At least two drive assembly limiting structures are provided inside the fixing member (21) and around the circumference of the support plate (223); The driving assembly includes a sliding member (231), a locking rod (232) and a tension spring (236), wherein a first slide groove (233) is formed on the sliding member (231), one end of the locking rod (232) is movably connected to the bottom of the driving assembly limiting structure, and the other end is capable of moving in the first slide groove; a first fixed column (235) is provided on the upper part of the driving assembly limiting structure, and a second fixed column (234) is provided on the top of the sliding member (231), and the two ends of the tension spring (236) are respectively connected between the first fixed column (235) and the second fixed column (234).

4. The artificial cervical intervertebral disc prosthesis according to claim 3, characterized in that: The first chute (233) includes a curved groove portion (2331) located at the top and a vertical groove portion (2332) connected to the curved groove portion (2331), wherein: The top of the vertical groove portion (2332) is connected to one side of the curved groove portion (2331), the bottom of the vertical groove portion (2332) extends vertically downward, and the bottom of the curved groove portion (2331) is lower than the top opening of the vertical groove portion (2332).

5. The artificial cervical intervertebral disc prosthesis according to claim 4, characterized in that: The driving component limiting structure includes a base plate (242), a limiting plate (241) located on the outside, and a slide rail assembly located on the inside. The limiting plate (241) and the slide rail assembly are arranged on the base plate (242) at intervals and form a space therebetween for limiting the tension spring (236) and the sliding member (231). The slide rail assembly includes a stopper (238) located above and a slide rail (237) located below. The height of the stopper (238) protruding from the base plate surface is greater than the height of the slide rail (237) protruding from the base plate surface.

6. The artificial cervical intervertebral disc prosthesis according to claim 5, characterized in that: A second sliding groove (245) is provided at a contact position of the sliding member (231) corresponding to the sliding rail (237), and the second sliding groove can be slidably arranged on the sliding rail (237) and move upward along the sliding rail (237) under the action of the tension spring (236); A fourth slide groove (244) is provided on the bottom plate (242) and located inside the slide rail (237), and a slider (246) is provided at the bottom of the sliding member (231) to cooperate with the fourth slide groove (244); the width of the side of the slide rail (237) away from the slider (246) is consistent with the space between the limiting plate (241) and the slide rail (237); A sliding plate is formed on the inner upper portion of the sliding member (231), a limiting block (230) is provided on the top of the sliding plate, a third sliding groove (239) is formed on the bottom plate (242) for allowing the sliding plate and the limiting block (230) to move, and a space for limiting the support plate (223) is formed between the limiting block (230) and the top of the sliding member (231).

7. The artificial cervical intervertebral disc prosthesis according to claim 6, characterized in that: A vertebral body connector (240) is formed at the connection between the support plate (223) and the sliding member (231), the vertebral body connector (240) being in a triangular cone shape, and an inclined surface consistent with the edge of the vertebral body connector (240) is formed on the top of one side of the sliding member (231) facing the support plate (223), so that the support plate (223) abuts against the top inclined surface of the sliding member (231) through the outer edge of the vertebral body connector, and the limit block (230) abuts against the top surface of the vertebral body connector.

8. The artificial cervical intervertebral disc prosthesis according to claim 7, characterized in that: A limiting hole (243) is provided at the bottom of the bottom plate (242), and the bottom of the locking pull rod (232) is movably limited in the limiting hole (243); When the second barb structure (2) is in the initial state, the top of the locking pull rod (232) is limited at the bottom of the curved groove portion (2331), the tension spring (236) is in a tensioned state, and the support plate (223) and the barb hook (222) of the spur (22) are limited in the cavity (20).

9. The artificial cervical intervertebral disc prosthesis according to claim 1, characterized in that: The first barb structure (1) includes a cylindrical barb, a columnar barb with an inclined surface, a conical barb, or a continuous or discontinuous tooth-shaped barb structure, wherein the bottom of the second barb structure (2) is embedded in the first barb structure (1) and the top of the second barb structure (2) is protruding from the surface of the first barb structure (1).

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