CN115944442A - Artificial intervertebral disc implantation system - Google Patents

Abstract

The invention relates to an artificial intervertebral disc implanting system, which comprises an implanting device and an implanting device, wherein the implanting device comprises a pair of drag hooks which are parallel to each other, the front ends of the drag hooks form extension arms of which outward hooks are straight lines backwards from the hooks, the hooks are respectively matched with the end surface shapes fixed on the left sides of two elastic arms, and the two hooks respectively hook the left end surfaces of the two elastic arms in an opening state that the two hooks are far away from each other; the two draw hooks are close to each other under the extrusion of the inner convex parts and are disengaged from the elastic arms in a contraction state when the two extension arms rotate to the positions between the inner convex parts. The artificial intervertebral disc can be implanted to the required position of the human body by arranging the matching of the end plates of the accurately positioned implantation device.

Description

Artificial intervertebral disc implantation system

Technical Field

The disclosure relates to the technical field of medical machinery, in particular to an artificial intervertebral disc implantation system.

Background

Artificial joints are already common orthopedic implants in the prior art, such as ankle joints, knee joints, etc. In recent years, joint prostheses such as artificial intervertebral discs and the like relating to spinal parts have also appeared. The damaged parts in the human body are replaced by using the joint prosthesis such as the artificial intervertebral disc and the like, so that the pain of a patient can be relieved to a certain extent by replacing the functions of the spine of the patient, and the life quality of the patient is improved.

In the prior art, artificial intervertebral discs are designed in joint-like structures, although the artificial intervertebral discs can simulate the structures of joints to a greater extent and simulate the functions of the joints, due to the limitation of materials and structures, although the intervertebral disc prostheses can realize the front-back twisting and torsional movement of the intervertebral discs, the artificial intervertebral disc prostheses cannot simulate the buffering function of human intervertebral discs on loads, and the movable range of the joint-like design has limitation.

Due to the anatomical structure of the high outer sole in the human intervertebral disc, the upper and lower end plate structures of the common artificial intervertebral disc need to be cut off in a large quantity when the artificial intervertebral disc is implanted, and then the artificial intervertebral disc is knocked to be implanted. Rendering the procedure complicated and risky.

In order to prevent postoperative failure of the artificial intervertebral disc, the artificial intervertebral disc needs to be placed with special attention during the surgical implantation of the artificial intervertebral disc, so that the prosthesis can accurately conduct stress along a cervical vertebra gravity load shaft, and the deviation of a conduction axis can cause the prosthesis to be convex and dislocated front and back after the operation, thereby causing the failure of the operation.

In order to simulate the function of the artificial intervertebral disc, the chinese patent application 202211665358.7 proposes an artificial intervertebral disc, which better simulates the function of the intervertebral disc, but the artificial intervertebral disc with such a structure has the problem of difficult implantation, and the safety and convenience of the implantation operation are related to the success or failure of the intervertebral disc replacement operation, so an artificial intervertebral disc implantation system which can be reliably and safely implanted is required to obtain better implantation operation performance.

Disclosure of Invention

The present disclosure has been made in view of the above-mentioned needs of the prior art, and it is an object of the present disclosure to provide an artificial intervertebral disc implantation system which can conveniently implant an artificial intervertebral disc into a desired position in a human body.

In order to solve the above problem, the technical solution provided by the present disclosure includes:

an artificial intervertebral disc implanting system comprises an artificial intervertebral disc, wherein the artificial intervertebral disc comprises an endplate sliding cover and an endplate sliding seat, and the endplate sliding cover is arranged on the endplate sliding seat; two elastic arms are arranged on the lower surface of the endplate sliding cover, the left sides of the two elastic arms are fixed with the lower surface of the endplate sliding cover, and the right sides of the two elastic arms are free ends; the front surface of the elastic arm at the front side and the back surface of the elastic arm at the back side are provided with elastic arm sawteeth which are respectively matched with the sawteeth of the front side wall and the sawteeth of the back side wall of the wide groove part on the endplate sliding seat; the implantation device comprises a pair of mutually parallel drag hooks, wherein the front ends of the drag hooks form extension arms with outward hooks which are straight lines from the hooks to the back, the hooks are respectively matched with the shapes of the end surfaces fixed on the left sides of the two elastic arms, and the two hooks respectively hook the left end surfaces of the two elastic arms in an opening state that the two hooks are far away from each other; the two draw hooks are close to each other under the extrusion of the inner convex parts and are disengaged from the elastic arms in a contraction state when the two extension arms rotate to the positions between the inner convex parts.

Preferably, the implantation device further comprises an operating handle, and the tail end of the extension arm of the draw hook is connected with the operating handle so as to be driven by the operating handle to rotate when the operating handle rotates.

Preferably, a marking ring is arranged outside the operating handle, the marking ring is independent from the operating handle when the operating handle rotates, and the draw hook is indicated to be in an opening state or a contraction state based on the phase position between the operating handle and the marking ring.

Preferably, the implant device further comprises a sleeve, wherein an internal thread is arranged in the sleeve; the periphery of the draw hook is provided with a convex tooth, and the convex tooth is meshed with an internal thread of a sleeve; when the sleeve rotates, the drag hook is driven to move back and forth based on the principle of the lead screw.

Preferably, the periphery of the draw hook is provided with a connecting piece, the connecting piece is cylindrical and fixedly arranged with the extension arm, and the periphery of the connecting piece forms the convex teeth.

Preferably, the implantation device further comprises a guide cylinder, the front end of the guide cylinder is flat, the rear end of the guide cylinder is a cylinder, a guide groove is formed in the cylinder, and the convex teeth are accommodated in the guide groove to provide a stable sliding track.

Preferably, the artificial intervertebral disc comprises an upper end plate and a lower end plate, the lower surface of the upper end plate and the upper surface of the lower end plate are respectively provided with a groove, the grooves accommodate the upper part and the lower part of the saccule, the groove wall of the upper end plate is arranged in a downward protruding mode, and the groove wall of the lower end plate is arranged in an upward protruding mode.

Preferably, the upper endplate comprises an upper endplate seat, an upper endplate sliding cover and a locking pin; the front and rear parts of the upper surface of the upper end plate seat are provided with transverse sliding chutes, a through middle sliding chute is arranged between the transverse sliding chutes, the middle sliding chute comprises a wide groove part and a narrow groove part, the wide groove part extends rightwards from the end part on the left side of the upper end plate seat, the narrow groove part extends leftwards from the end part on the right side of the upper end plate seat, and the wide groove part and the narrow groove part are intersected at a junction to form a step; the front and back side walls of the wide groove part are provided with sawteeth.

Preferably, the right side of the locking pin is provided with an elastic locking arm, the right side of the locking arm is fixedly arranged on the locking pin body, the left side of the locking arm is a free end, the free end is provided with a protrusion extending outwards, after the locking pin is implanted in place, the left side of the elastic locking arm extends out of the narrow groove part, and the protrusion abuts against a step at the right end of the wide groove part.

Preferably, the right side of the narrow groove part is provided with a positioning part, the width of the positioning part is greater than that of the narrow groove part, and the right side of the locking pin is matched with the positioning part in shape to position the limit position of the locking pin inserted leftwards.

Compared with the prior art, the artificial intervertebral disc can be implanted to the position required by the human body by arranging the matching of the end plates of the accurately positioned implantation device. Has the performance similar to the native tissue of human body and is easy to operate.

Drawings

In order to more clearly illustrate the embodiments of the present specification or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the embodiments of the present specification, and other drawings can be obtained by those skilled in the art according to the drawings.

FIG. 1 is a schematic view of a disc configuration in a vertebral body;

FIG. 2 is a schematic structural view of the artificial intervertebral disc of this embodiment;

FIG. 3 is a schematic view of the upper end seat of the artificial intervertebral disc according to this embodiment;

FIG. 4 is a schematic view of the sliding cover structure of the upper terminal seat of the artificial intervertebral disc according to the present embodiment;

FIG. 5 is a schematic view of the structure of the artificial intervertebral disc of this embodiment;

FIG. 6 is a schematic structural view showing the operation of the implant device of the artificial intervertebral disc system according to the present embodiment;

FIG. 7 is a close-up view of the operation of the implant device of the artificial disc system of this embodiment;

FIG. 8 is a schematic view of the working configuration of the collar of the implant device of the artificial disc system of this embodiment;

FIG. 9 is a partial schematic structural view showing the operation of an implant device of the artificial intervertebral disc system according to the present embodiment;

fig. 10 is a structural view illustrating the assembly of an implant device for the artificial intervertebral disc system according to the present embodiment.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the embodiments of the present disclosure, it should be noted that, unless otherwise explicitly stated or limited, the term "connected" should be interpreted broadly, and may be, for example, a fixed connection, a detachable connection, or an integral connection, which may be a mechanical connection, an electrical connection, which may be a direct connection, or an indirect connection via an intermediate medium. The specific meaning of the above terms in the present disclosure can be understood by those of ordinary skill in the art as appropriate.

The terms "top," "bottom," "at 8230; \8230; above," "below," and "at 8230; above" are used throughout the description to refer to the relative positions of the components of the device, such as the relative positions of the top and bottom substrates inside the device. It will be appreciated that the devices are multifunctional, independent of their orientation in space.

For the purpose of facilitating understanding of the embodiments of the present application, the following detailed description will be given with reference to the accompanying drawings, which are not intended to limit the embodiments of the present application.

This embodiment provides an artificial intervertebral disc implantation system to the accurate implantation under less destruction degree of joint prosthesis that can simulate human intervertebral disc function is realized through the reasonable design of artificial intervertebral disc and implantation instrument.

In order to solve the above technical problems, an artificial intervertebral disc implanting system of an embodiment includes two parts of an artificial intervertebral disc and an implanting tool.

With respect to the artificial intervertebral disc portion,

intervertebral disc 001 refers to the cartilage in the spine, particularly between the upper 002 and lower 003 vertebral bodies of two adjacent vertebrae in the human spine. The human intervertebral disc comprises a peripheral annulus fibrosus and a central nucleus pulposus.

The annulus fibrosus is composed of multiple layers of staggered fibrocartilage rings, firmly connects vertebral bodies together, has greater elasticity and toughness, and can prevent nucleus pulposus from overflowing besides bearing pressure. The nucleus pulposus is a white colloidal substance and is rich in elasticity. When the nucleus pulposus is subjected to the action of gravity, it expands all around and squeezes the annulus fibers to extend and expand circumferentially.

During spinal motion, the intervertebral discs undergo a wedge-like deformation. If the spine is anteflexion, the anterior half of the intervertebral disc is flattened and thinned, the posterior half is thickened, and the nucleus pulposus moves backwards; the opposite is true when the spine is extended posteriorly. If the spine bends to the right side, the right half part of the intervertebral disc becomes thinner and the left half part becomes thicker, and the nucleus pulposus moves to the left; the opposite change occurs when the spine is bent to the left. Therefore, the intervertebral disc has the functions of increasing the motion amplitude of the spine, bearing pressure, buffering vibration and protecting the brain and the spinal cord; and is also the main reason for the changes of the height in the morning and evening.

Since both the annulus fibrosus and the central nucleus pulposus have a cushioning effect and, in the human intervertebral disc, the annulus fibrosus in particular can provide cushioning at a plurality of angles and positions, the intervertebral disc prostheses in the prior art strive for the same structure as the human intervertebral disc but are difficult to fully restore the full performance of the human body's standing keyboard, and the intervertebral disc is located at a core sensitive position of the human vertebra where damage to the original vertebral tissues should be avoided as much as possible during the operation of implanting the prosthesis to preserve the function of the human body as intact as possible.

To this end, in this embodiment, an artificial intervertebral disc 1 is provided. In this embodiment, the structure of the artificial disc is as shown in figures 2-5.

The artificial intervertebral disc includes an upper endplate 2 and a lower endplate 3 disposed at a predetermined distance from each other. The upper endplate 2 and the lower endplate 3 are made of a rigid material to provide the necessary support. The upper end plate 2 is contacted with an upper vertebral body implanted into the position of the artificial intervertebral disc, the lower end plate 3 is contacted with a lower vertebral body implanted into the position of the artificial intervertebral disc, and the upper end plate and the lower end plate are matched with the corresponding upper vertebral body and the corresponding lower vertebral body in shape, so that the artificial intervertebral disc is convenient to place and generate effects.

In addition to the abutting action in the up-down direction, the upper endplate and the lower endplate need to maintain a sufficient holding force between the upper vertebral body and the lower vertebral body to prevent dislocation or displacement of the artificial intervertebral disc, and thus in this embodiment, the upper surface of the upper endplate and the lower surface of the lower endplate are further provided with fixing teeth 4 extending from the upper endplate or the lower endplate toward the respective fixed vertebral body to be in contact with and fixed to the upper vertebral body and the lower vertebral body. In one embodiment, the serrations are fixedly disposed on the outer surface of the upper endplate or the lower endplate in a manner that provides a more secure connection and thus improves the stability of the connection.

More preferably, as shown in FIG. 3, the upper endplate includes an upper endplate seat 21, an upper endplate slide 22, and a locking pin 23.

The upper end plate seat is arranged below the upper end plate, the upper end plate seat is approximately trapezoidal and matched with the upper vertebral body in shape, the front part and the rear part of the upper surface of the upper end plate seat are provided with transverse sliding grooves 211, the sliding grooves are slender sliding grooves, a through middle sliding groove is arranged between the transverse sliding grooves, the middle sliding groove comprises a wide groove part 212 and a narrow groove part 213, the wide groove part extends rightwards from the end part on the left side, and the narrow groove part extends leftwards from the end part on the right side. The wide groove part and the narrow groove part are intersected to form a step at the intersection.

The upper endplate sliding cover 22 is arranged on the upper endplate sliding seat, the upper surface of the upper endplate sliding cover is provided with fixing teeth 4, the front side and the rear side of the lower surface of the upper endplate sliding cover are provided with sliding blocks 221 matched with the sliding grooves, so that the upper endplate sliding cover can slide left and right on the upper endplate sliding seat to adjust the proper position of the upper endplate based on the guiding effect of the sliding grooves 211 and the sliding blocks 221, and the size and the position of the upper endplate can be adjusted.

While the sliding channels 211 and sliders 221 provide sliding motion, the intervertebral discs are desirably secured to the vertebral bodies to provide stable cushioning, and thus, a structure that facilitates both adjustment and fixation is also desired. During the implantation of the intervertebral disc prosthesis, sliding and fixation need to be easy to handle, due to the blocking in various orientations.

In this embodiment, the front and rear side walls of the wide groove portion 212 are provided with saw teeth 2121, the lower surface of the upper endplate sliding cover is provided with two elastic arms 222, the left sides of the two elastic arms are fixed to the lower surface of the upper endplate sliding cover, and the right sides of the two elastic arms are free ends, so that the two elastic arms have elasticity of rebounding along the front and rear directions.

The front surface of the front side elastic arm and the rear surface of the rear side elastic arm are provided with elastic arm serrations 2221 which are fitted with the serrations 2121 and 2221 of the front side wall and the rear side wall of the wide groove portion, respectively. A stable engagement is formed when the resilient arm serrations are embedded in the serrations of the wide groove portion. At this time, if the position of the elastic arm is fixed, the upper terminal cover seat and the upper terminal cover sliding cover can be stably fixed by a plurality of sawteeth without easily shaking and shifting.

For this purpose, in the present embodiment, a locking pin 23 is provided, which is inserted into the wide groove part from the narrow groove part 213 in a sliding manner and is inserted between the two elastic arms, so that the two elastic arms can be spread apart by the locking pin, and the saw teeth 2221 of the elastic arms are engaged with the saw teeth 2121 of the wide groove part, thereby fixing the position of the upper endplate sliding cover. The right side of the locking pin is provided with an elastic locking arm 231, the right side of the locking arm is fixedly arranged on the locking pin body, the left side of the locking arm is a free end, the free end is provided with a protrusion extending outwards, after the locking pin is implanted in place, the left side of the elastic locking arm extends out of the narrow groove part, and the protrusion abuts against the step at the right end of the wide groove part, so that the position of the locking pin is locked. In the present embodiment, it is further preferable that a positioning part 2131 having a width larger than that of the narrow groove part is further provided on the right side of the narrow groove part, and the right side shape of the locking pin is matched with the positioning part to further position the position of the locking pin. I.e. locking the locking pin against movement neither to the left nor to the right.

Although the front, back, left and right directions are described in this embodiment, it will be understood by those skilled in the art that the structures arranged in the front and back directions may be interchanged, and the structures arranged in the left and right directions may be interchanged, which does not affect the operation of the upper endplate of this embodiment.

The lower endplate may have the same structure as the upper endplate, but of course the sliding cover of the lower endplate is arranged below the seat of the lower endplate because the lower endplate needs to be matched with the lower vertebral body.

By designing the superior endplate/inferior endplate or both as a bi-layer structure. I.e., a structure that includes an endplate seat and an endplate slider, as well as a locking pin. After the artificial intervertebral disc is implanted, the position of the vertebral body can be finely adjusted and locked after the prosthesis is implanted, so that the artificial intervertebral disc has the function of lifting and restoring, the positions of the vertebral body and the prosthesis are more in line with physiological requirements, and the risk of failure of the operation is reduced. And the operations are performed from the side without being blocked, so that the operation is convenient.

In this embodiment, an elastic body 5 is disposed between the upper endplate and the lower endplate, the elastic body includes a multi-layer structure, each layer has a ring-shaped cross section, and two adjacent layers are disposed at a predetermined distance from each other. The ring shape of each layer is composed of a plurality of n-type cells 51, which are uniformly arranged along a circular ring. Two adjacent edges of two adjacent n-type units are connected at the end part of the annular inner ring, so that a structure with a rotation allowance and a buffer space along a transverse plane is formed.

The longitudinal cross-section 52 of each layer is also n-type, i.e., the n-type cells are generally n-type not only in transverse cross-section, but also in longitudinal cross-section. In the longitudinal section, the adjacent n-type structures of the upper layer and the lower layer are arranged in an up-down alignment mode, and the openings face to the inner ring position and are connected with each other at the inner ring position.

Thus, a multi-layer structure which is mutually connected is formed, and the multi-layer structure can provide the buffering in the front, back, left and right directions and also provide the buffering in the up-down direction and the twisting direction, and has the buffering and connecting effects close to the human intervertebral disc.

The upper layer of the elastic body is connected with the upper end plate, and the lower layer of the elastic body is connected with the lower end plate. In order to facilitate and firmly connect, the lower surface of the upper end plate and the upper surface of the lower end plate are respectively provided with an annular groove, the wall of the annular groove is clamped between the upper layer and the lower layer of the elastic body, and the upper layer and the lower layer of the elastic body are respectively arranged in the grooves of the upper end plate and the lower end plate. The upper end plate and the lower end plate are arranged in a mutually embedded mode with the elastic body, and therefore the stable connection degree between the upper end plate and the elastic body and the stable connection degree between the lower end plate and the elastic body can be improved.

The elastic body 5 enables the annular titanium alloy/nickel-titanium alloy metal block to have radial and axial elastic functions through special cutting and heat treatment processes, and realizes tension-compression, bending and torsion motions.

A balloon 6 is further arranged between the upper and lower endplates and comprises a balloon body 61 made of a flexible material, preferably an elastic material such as silica gel. The balloon body is located between the upper endplate and the lower endplate in a vertical direction and located in the ring of the elastic body in a horizontal direction. Preferably, the balloon is ellipsoidal with a height in the superior-inferior direction that is less than the length in the lateral direction, which provides similar elastic properties compared to the shape of the nucleus pulposus.

The lower surface of the upper end plate and the upper surface of the lower end plate are respectively provided with a groove, the grooves accommodate the upper part and the lower part of the balloon, the groove wall of the upper end plate is arranged in a downward protruding manner, and the groove wall of the lower end plate is arranged in an upward protruding manner, so that on one hand, the balloon can be accommodated, and on the other hand, the two groove walls can also play a limiting role, namely, the positions of the upper end plate and the lower end plate which are close to each other are limited.

The side of the balloon is provided with an opening 62 in which a valve 63 is arranged, which allows for better elastic cushioning and a longer life by injecting one of a filling saline solution, a silicone-based elastomer, a hydrogel, or a silicone into the balloon. Before the filler is injected, the volume of the balloon can be reduced, and in order to facilitate installation of the balloon, in the present embodiment, an opening is formed in an outer side wall of the elastic body, the balloon can be implanted from the opening, an opening of the balloon is arranged opposite to the opening, and after the balloon is implanted into the elastic body, the filler is injected from the opening of the balloon, so that the artificial intervertebral disc can be distracted. The implantation operation is convenient.

The artificial intervertebral disc can better simulate the structure and the performance of the human native intervertebral disc, but the structure is complex, so the artificial intervertebral disc is still a problem to be solved if the artificial intervertebral disc is implanted.

To this end, the artificial disc system of this embodiment further comprises an implant device. The implant device of this embodiment is configured as shown in fig. 6, and its primary purpose is to implant the body portion of the prosthetic disc to a predetermined position by the implant device engaging the upper endplate seat 21, and then operating the locking pin 23 to lock the upper endplate seat 21 and the upper endplate slide cover 22.

In this procedure, the positioning and implantation of the upper endplate seats is important, and is complicated, with clamping and implantation tools that, if appropriate, can improve the chances of surgical success and reduce collateral damage.

In this embodiment, the implant device 7 is configured as shown in figures 6-10.

Specifically, the implantation device comprises a pair of mutually parallel draw hooks 71, the front ends of the draw hooks are formed into extension arms 73, the outward hooks 72 of which are substantially straight lines backward from the hooks, so as to be respectively matched with the end surface shapes fixed on the left sides of the two elastic arms 222, the two hooks respectively hook the left end surfaces of the two elastic arms in the open state of the two hooks far away from each other, and the extension arms of the two hooks respectively abut against the inner side surfaces of the two elastic arms, so that the mutual position between the upper endplate seat 21 and the upper endplate sliding cover 22 is fixed.

The implantation device and the elastic arm can apply force to the artificial intervertebral disc after being fixed, but the implantation device also needs to be capable of being taken out of the artificial intervertebral disc through the middle sliding groove 213, or be partially inserted into the artificial intervertebral disc from the middle sliding groove 213 in an initial state.

Preferably, the tail end of the extension arm of the draw hook is provided with an operating handle 76, the operating handle is matched with the extension arm to drive the extension arm to rotate together, the operating handle can be further provided with a marking ring 77, the marking ring is independent from the operating handle when the operating handle rotates and does not move together with the operating handle, and the draw hook is in an opening state or a contraction state based on the mutual phase indication of the operating handle and the marking ring.

Furthermore, the draw hook is provided with a convex tooth 78 on the periphery, the convex tooth is meshed with the internal thread of a sleeve 79, and when the sleeve rotates, the draw hook is driven to move back and forth based on the principle of a lead screw, so that a larger operating force is provided, and the movement track is kept uniform and stable.

In order to maintain the strength of the retractor, a connecting piece 710 can be arranged on the periphery of the retractor, the connecting piece is cylindrical and is fixedly arranged with the extension arm, and convex teeth are formed on the periphery of the connecting piece to support higher operation strength.

The rotary driving drag hook based on the sleeve has stable motion, the applied force is suitable, the operation is convenient, and the injury of the operation can be reduced.

In this embodiment, the drag hook moves back and forth and the switch between opening and contracting needs to have a stable movement track, because the drag hook includes the extension arm, in order to avoid the extension arm to produce unexpected rocking, a guide cylinder 711 is further provided in the implantation device of this embodiment, the front end shape of the guide cylinder is flat to avoid rocking of the drag hook, the rear end of the guide cylinder is a cylinder, a guide groove is provided on the cylinder, and the convex tooth is accommodated in the guide groove to provide a stable sliding track.

The above-mentioned embodiments, objects, technical solutions and advantages of the present application are described in further detail, it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present application, and are not intended to limit the scope of the present application, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present application should be included in the scope of the present application.

Claims (10)

1. An artificial intervertebral disc implant system comprising

The artificial intervertebral disc comprises an endplate sliding cover and an endplate sliding seat, and the endplate sliding cover is arranged on the endplate sliding seat; two elastic arms are arranged on the lower surface of the endplate sliding cover, the left sides of the two elastic arms are fixed with the lower surface of the endplate sliding cover, and the right sides of the two elastic arms are free ends; the front surface of the elastic arm at the front side and the back surface of the elastic arm at the back side are provided with elastic arm sawteeth which are respectively matched with the sawteeth of the front side wall and the sawteeth of the back side wall of the wide groove part on the endplate sliding seat;

the implantation device comprises a pair of mutually parallel drag hooks, wherein the front ends of the drag hooks form extension arms with outward hooks which are straight lines from the hooks to the back, the hooks are respectively matched with the shapes of the end surfaces fixed on the left sides of the two elastic arms, and the two hooks respectively hook the left end surfaces of the two elastic arms in an opening state that the two hooks are far away from each other; the two draw hooks are close to each other under the extrusion of the inner convex parts and are disengaged from the elastic arms in a contraction state when the two extension arms rotate to the positions between the inner convex parts.

2. The artificial intervertebral disc implantation system of claim 1, wherein the implantation device further comprises an operating handle, and the distal end of the extension arm of the retractor is connected to the operating handle so that the operating handle is rotated by the operating handle.

3. The artificial intervertebral disc implantation system of claim 2, wherein the operating handle is provided with a marker ring outside, the marker ring being independent of the operating handle when the operating handle is rotated, and the retractor is configured to be in the open state or the contracted state based on the relative phase between the operating handle and the marker ring.

4. The prosthetic intervertebral disc implantation system of claim 1, wherein said implant device further comprises a sleeve having an internal thread disposed therein; the periphery of the draw hook is provided with a convex tooth, and the convex tooth is meshed with an internal thread of a sleeve; when the sleeve rotates, the drag hook is driven to move back and forth based on the principle of the lead screw.

5. The artificial intervertebral disc implantation system of claim 4, wherein the hook includes a connecting member disposed around the outer periphery thereof, the connecting member being cylindrical and fixedly disposed to the extension arm, the teeth being formed around the connecting member.

6. The artificial disc implanting system of claim 1, further comprising a guiding cylinder, wherein the guiding cylinder has a flat shape at its front end, and a cylindrical shape at its rear end, and the cylindrical shape is provided with a guiding groove, and the teeth are received in the guiding groove to provide a stable sliding track.

7. The artificial disc implant system of claim 1, wherein the artificial disc comprises an upper end plate and a lower end plate, the lower surface of the upper end plate and the upper surface of the lower end plate are respectively provided with a groove, the grooves accommodate the upper part and the lower part of the balloon, the groove wall of the upper end plate is arranged to protrude downwards, and the groove wall of the lower end plate is arranged to protrude upwards.

8. The prosthetic disc implant system of claim 1, wherein said upper endplate comprises an upper endplate seat, an upper endplate slide, and a locking pin; the front part and the rear part of the upper surface of the upper end plate seat are provided with transverse sliding grooves, a through middle sliding groove is arranged between the transverse sliding grooves, the middle sliding groove comprises a wide groove part and a narrow groove part, the wide groove part extends rightwards from the end part on the left side of the upper end plate seat, the narrow groove part extends leftwards from the end part on the right side of the upper end plate seat, and the intersection of the wide groove part and the narrow groove part forms a step; the front and back side walls of the wide groove part are provided with sawteeth.

9. An artificial disc implantation system according to claim 8, wherein the locking pin is provided with a flexible locking arm on a right side thereof, the locking arm being fixedly provided on the locking pin body on a right side thereof, the locking arm being provided with a free end on a left side thereof with a projection extending outwardly therefrom, the flexible locking arm projecting from the narrow groove portion on a left side thereof with the projection abutting against a step on a right end of the wide groove portion when the locking pin is implanted in place.

10. The artificial disc implanting system of claim 9, wherein the right side of the narrow groove portion is provided with a positioning portion having a width larger than that of the narrow groove portion, and the right side of the locking pin is shaped to fit the positioning portion in a position to locate the leftwards inserted limit position of the locking pin.

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