CN107518966B

CN107518966B - Intervertebral disc prosthesis holder

Info

Publication number: CN107518966B
Application number: CN201710734056.3A
Authority: CN
Inventors: 王彩梅
Original assignee: Beijing AK Medical Co Ltd
Current assignee: Beijing AK Medical Co Ltd
Priority date: 2017-08-23
Filing date: 2017-08-23
Publication date: 2023-07-28
Anticipated expiration: 2037-08-23
Also published as: CN107518966A

Abstract

The invention provides an intervertebral disc prosthesis holder for grasping and moving an intervertebral disc prosthesis, which comprises a first endplate, a second endplate and a nucleus pulposus, wherein the first endplate and the second endplate are oppositely arranged, the nucleus pulposus is arranged between the first endplate and the second endplate, the intervertebral disc prosthesis holder comprises a clamping part for fixing the intervertebral disc prosthesis, the clamping part comprises a first clamping arm and a second clamping arm which are oppositely arranged, the intervertebral disc prosthesis can be clamped between the first clamping arm and the second clamping arm, the first clamping arm is provided with a first retaining part, the second clamping arm is provided with a second retaining part, and the first retaining part and the second retaining part can extend into a gap between the first endplate and the second endplate so as to enable the first endplate and the second endplate to keep a preset relative position in the moving process. The technical scheme of the invention effectively solves the problem that the intervertebral disc prosthesis is askew when being placed in the prior art.

Description

Intervertebral disc prosthesis holder

Technical Field

The invention relates to the field of medical instruments, in particular to an intervertebral disc prosthesis holder.

Background

The artificial disc replacement (total disc replacement TDR) is a new method for treating disc degeneration diseases in recent years, is mainly used for treating disc degeneration diseases such as disc-derived lumbago, and is clinically applied in the 80 th 20 th century. The intervertebral disc prosthesis replaces the original intervertebral disc, so that not only is the pathological change intervertebral disc removed, but also the stability and activity function of the segment are restored, and the adjacent segment degeneration acceleration caused by the spinal fusion can be avoided theoretically.

Artificial disc replacement requires grasping an intervertebral disc prosthesis by a holder and striking the holder to place the intervertebral disc prosthesis between adjacent vertebral bodies. The existing intervertebral disc prosthesis holder used clinically is difficult to ensure the posture of the intervertebral disc prosthesis, so that the intervertebral disc prosthesis is easy to skew when being placed in a patient, and the normal life of the patient after operation is further affected.

Disclosure of Invention

The invention aims to provide an intervertebral disc prosthesis holder which solves the problem that an intervertebral disc prosthesis is askew when being placed in the prior art.

In order to achieve the above object, the present invention provides an intervertebral disc prosthesis holder for grasping and moving an intervertebral disc prosthesis, the intervertebral disc prosthesis comprising first and second endplates disposed opposite each other and a nucleus disposed between the first and second endplates, the intervertebral disc prosthesis holder comprising a clamping portion for fixing the intervertebral disc prosthesis, the clamping portion comprising two first and second clamping arms disposed opposite each other, the intervertebral disc prosthesis being capable of being clamped between the first and second clamping arms, the first clamping arm being provided with a first retaining portion and the second clamping arm being provided with a second retaining portion, the first and second retaining portions each being capable of extending into a gap between the first and second endplates so that the first and second endplates maintain a predetermined relative position during movement.

Further, the first retaining portion includes first and second retaining structures disposed at intervals, the second retaining portion includes third and fourth retaining structures disposed at intervals, the first and third retaining structures are disposed opposite each other, the second and fourth retaining structures are disposed opposite each other, and a center of the nucleus is located between the first and second retaining structures when the intervertebral disc prosthesis is fixed in the clamping portion.

Further, the first and second retaining structures are first retaining tabs extending from the first clip arm to the second clip arm, and the third and fourth retaining structures are second retaining tabs extending from the second clip arm to the first clip arm.

Further, the clamping portion further comprises a pushing portion, the pushing portion is arranged at the rear ends of the first clamping arm and the second clamping arm, and when the intervertebral disc prosthesis is fixed in the clamping portion, the pushing portion is simultaneously contacted with the first end plate and the second end plate.

Further, the pushing portion is curved and inwardly convex, and the inwardly convex portion of the pushing portion is capable of contacting the first endplate and the second endplate.

Further, the intervertebral disc prosthesis holder further comprises a holding part connected with the clamping part, the holding part comprises a rod body, a sleeve sleeved on the rod body and an elastic connecting rod for connecting the rod body and the pushing part, the sleeve can slide relative to the rod body, the elastic connecting rod comprises a first connecting rod corresponding to the first clamping arm and the second clamping arm and a second connecting rod corresponding to the second clamping arm, when the sleeve is close to the clamping part, the first connecting rod is close to the second connecting rod, and when the sleeve is far away from the clamping part, the first connecting rod is separated from the second connecting rod.

Further, one end of the sleeve close to the clamping part is provided with a guide conical surface which gradually expands from the inside of the sleeve to the outside of the sleeve.

Further, the sleeve is connected with the rod body through a thread structure.

Further, a first encircling structure is arranged on the first clamping arm so as to limit the intervertebral disc prosthesis to move forwards and backwards relative to the clamping part.

Further, a second encircling structure is arranged on the first clamping arm so as to limit the intervertebral disc prosthesis to move up and down relative to the clamping part.

With the technical scheme of the invention, when the clamping part of the intervertebral disc prosthesis holder clamps the intervertebral disc prosthesis, the first clamping arm and the second clamping arm limit the free movement of the intervertebral disc prosthesis. The first retaining part and the second retaining part extend into the gap between the first end plate and the second end plate, so that the first end plate is prevented from swinging relative to the second end plate, the first end plate and the second end plate keep a preset relative position in the moving process, and further the intervertebral disc prosthesis can be placed into a patient according to a preset shape, and the skew of the intervertebral disc prosthesis is avoided to influence the normal life of a user.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:

fig. 1 shows a schematic structural view of an embodiment of an intervertebral disc prosthesis holder according to the invention;

FIG. 2 shows a schematic structural view of the clamping portion of the intervertebral disc prosthesis holder of FIG. 1;

FIG. 3 shows a schematic structural view of an intervertebral disc prosthesis in the intervertebral disc prosthesis holder of FIG. 1;

FIG. 4 shows a schematic view of the sleeve of the intervertebral disc prosthesis holder of FIG. 1 in semi-section;

FIG. 5a shows a schematic view of the intervertebral disc prosthesis holder of FIG. 1 in an expanded state;

FIG. 5b shows a schematic structural view of the intervertebral disc prosthesis holder of FIG. 1 in a clamped state;

FIG. 6 shows a schematic structural view of the intervertebral disc prosthesis holder of FIG. 1 in cooperation with an intervertebral disc prosthesis;

FIG. 7 shows a schematic A-A cross-sectional view of the intervertebral disc prosthesis holder of FIG. 6 with an intervertebral disc prosthesis; and

fig. 8 shows a schematic view of the B-B cross-sectional structure of the intervertebral disc prosthesis holder and intervertebral disc prosthesis of fig. 7.

Wherein the above figures include the following reference numerals:

10. a clamping part; 11. a first clamp arm; 12. a second clamp arm; 13. a first holding portion; 131. a first retaining structure; 132. a second retaining structure; 14. a second holding portion; 141. a third retaining structure; 142. a fourth retaining structure; 15. a pushing part; 16. a front encircling sheet; 17. an upper encircling sheet; 18. a lower encircling sheet; 20. a grip portion; 21. a rod body; 22. a sleeve; 23. an elastic connecting rod; 231. a first link; 232. a second link; 24. a guide conical surface; 70. a first endplate; 80. a second endplate; 90. a nucleus pulposus.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

As shown in fig. 1 to 3, the intervertebral disc prosthesis holder of the present embodiment is used to grasp and move an intervertebral disc prosthesis. The intervertebral disc prosthesis includes oppositely disposed first and second endplates 70, 80 and a nucleus pulposus 90 disposed between the first and second endplates 70, 80. The intervertebral disc prosthesis holder comprises a clamping part 10 for fixing the intervertebral disc prosthesis, the clamping part 10 comprises a first clamping arm 11 and a second clamping arm 12 which are oppositely arranged, the intervertebral disc prosthesis can be clamped between the first clamping arm 11 and the second clamping arm 12, a first retaining part 13 is arranged on the first clamping arm 11, a second retaining part 14 is arranged on the second clamping arm 12, and the first retaining part 13 and the second retaining part 14 can extend into a gap between the first end plate 70 and the second end plate 80 so that the first end plate 70 and the second end plate 80 can keep a preset relative position in the moving process.

The first endplate 70, the nucleus 90, and the second endplate 80 of the intervertebral disc prosthesis are disposed in series in a vertical direction, and the first and second arms 11, 12 are disposed on opposite sides of the intervertebral disc prosthesis in a lateral direction.

With the technical solution of the present embodiment, the first clamping arm 11 and the second clamping arm 12 limit the free movement of the intervertebral disc prosthesis when the clamping portion 10 of the intervertebral disc prosthesis holder clamps the intervertebral disc prosthesis. The first retaining portion 13 and the second retaining portion 14 extend into the gap between the first endplate 70 and the second endplate 80, preventing the first endplate 70 from swinging relative to the second endplate 80, allowing the first endplate 70 and the second endplate 80 to maintain a predetermined relative position during movement, and further allowing the intervertebral disc prosthesis to be placed in the patient according to a predetermined shape, preventing the intervertebral disc prosthesis from skewing to affect the normal life of the user.

Specifically, as shown in fig. 2, the first holding portion 13 of the present embodiment includes first holding structures 131 and second holding structures 132 arranged at intervals, and similarly, the second holding portion 14 includes third holding structures 141 and fourth holding structures 142 arranged at intervals. The first and third holding structures 131 and 141 are disposed opposite each other, and the second and fourth holding structures 132 and 142 are disposed opposite each other. When the intervertebral disc prosthesis is secured in the clamping portion 10, the center of the nucleus 90 is located between the first retaining structure 131 and the second retaining structure 132.

The intervertebral disc prosthesis is required to perform both anterior-posterior side-to-side swing and pivoting functions as a substitute for the intervertebral disc, so that the first endplate is capable of swinging and pivoting relative to the second endplate through the nucleus pulposus. The four retaining structures (first retaining structure 131, second retaining structure 132, third retaining structure 141, and fourth retaining structure 142) of the present embodiment enclose the nucleus 90 from four directions of the nucleus 90 from front to back, left to right, and extend between the first endplate 70 and the second endplate 80, respectively, and at least one of the four retaining structures is capable of abutting against the lower surface of the first endplate 70 to counteract the tendency of oscillation when the first endplate 70 is caused to oscillate from either direction relative to the second endplate 80. Thereby maintaining the first endplate 70 and the second endplate 80 in a predetermined relative position during movement.

The first endplate and the second endplate should generally remain in a relatively parallel position, but the relative states of the first endplate and the second endplate may need to be adjusted adaptively depending on the particular targeted vertebral segment of the intervertebral disc prosthesis and the irregularities in the shape of the first endplate and the second endplate. Accordingly, the height and angle of the four retaining structures should be adjusted as needed to maintain a predetermined relative position of the first endplate or the second endplate against the four retaining structures.

Specifically, as shown in fig. 2, the four holding structures of the present embodiment are each in the form of a sheet, the first holding structure 131 and the second holding structure 132 are first holding pieces extending from the first clip arm 11 to the second clip arm 12, and the third holding structure 141 and the fourth holding structure 142 are second holding pieces extending from the second clip arm 12 to the first clip arm 11. The sheet structure is simple and easy to realize. The first clamping arm 11 and the second clamping arm 12 can also adopt a sheet-shaped structure, and the retaining sheet is formed by punching and bending part of the clamping arm material inwards, so that the production is simplified, and the material is saved.

Further, as shown in fig. 2, 6 and 7, the clamping portion 10 of the present embodiment further includes a pushing portion 15, where the pushing portion 15 is disposed at the rear ends of the first clamping arm 11 and the second clamping arm 12, and the pushing portion 15 contacts the first endplate 70 and the second endplate 80 at the same time when the intervertebral disc prosthesis is fixed in the clamping portion 10. Since the intervertebral disc prosthesis is required to be knocked into the patient's body by the intervertebral disc prosthesis holder during the intervertebral disc replacement, the intervertebral disc prosthesis is placed into the patient's body by transmitting this portion of force through the pushing portion 15. The pushing portion 15 contacts the first endplate 70 and the second endplate 80 simultaneously to uniformly stress the intervertebral disc prosthesis, and the situation that the pushing portion 15 applies force to the nucleus pulposus 90 to separate the first endplate 70 from the second endplate 80 and the nucleus pulposus 90 is pulled out from between the first endplate 70 and the second endplate 80 to cause failure of the operation is avoided.

Specifically, as shown in fig. 2 and 6, the pushing portion 15 of the present embodiment is curved and protrudes inward, and the portion of the pushing portion 15 protruding inward can contact the first endplate 70 and the second endplate 80. The curvature of the pushing portion 15 increases the elasticity of the pushing portion 15, reducing the risk of breakage and damage during surgery.

Further, as shown in fig. 5a to 7, a first encircling structure is further provided on the first clamping arm 11 of the present embodiment to restrict the intervertebral disc prosthesis from moving back and forth relative to the clamping portion 10. The first embracing structure comprises a front embracing tab 16 provided on both arms (first arm 11 and second arm 12), mainly for preventing the intervertebral disc prosthesis from slipping out of the front end of the clamping portion 10 during movement. Because the rear ends of the first clamping arm 11 and the second clamping arm 12 are provided with pushing parts 15 which are in contact with the end plates, the first encircling structure can optionally comprise rear encircling sheets arranged at the rear ends of the two clamping arms, so that the intervertebral disc prosthesis is further ensured not to slide out of the rear ends of the clamping parts 10 in the moving process.

Further, as shown in fig. 2 and 5a to 8, a second encircling structure is further provided on the first clamping arm 11 of the present embodiment to limit the up-and-down movement of the intervertebral disc prosthesis relative to the clamping portion 10. The second encircling structure comprises an upper encircling piece 17 extending upwards and inwards from the upper edges of the two clamping arms, and a lower encircling piece 18 extending downwards and inwards from the lower edges of the two clamping arms, and can prevent the intervertebral disc prosthesis from being pulled out of the intervertebral disc prosthesis holder from the upper and lower directions of the clamping part 10.

The clamping arms, the holding parts and the encircling structure ensure that the intervertebral disc prosthesis cannot be pulled out of the intervertebral disc prosthesis holder in the operation process from all directions, and the failure rate of the operation is reduced. Preferably, the intervertebral disc prosthesis holder of the present embodiment is of symmetrical construction in the left-right direction.

Further, as shown in fig. 1 and fig. 4 to 7, the intervertebral disc prosthesis holder of the present embodiment further includes a holding portion 20 connected to the holding portion 10, the holding portion 20 includes a rod body 21, a sleeve 22 sleeved on the rod body 21, and an elastic link 23 connecting the rod body 21 and the pushing portion 15, the sleeve 22 is capable of sliding relative to the rod body 21, the elastic link 23 includes a first link 231 corresponding to the first clamping arm 11 and the second clamping arm 12 and a second link 232 corresponding to the second clamping arm 12, when the sleeve 22 approaches the holding portion 10, the first link 231 and the second link 232 approach each other, and when the sleeve 22 is far from the holding portion 10, the first link 231 and the second link 232 are separated.

The structure realizes the opening and clamping of the clamping part 10 by utilizing the elasticity of the material of the elastic connecting rod 23, and has simple structure and stable operation.

Further, as shown in fig. 4, the sleeve 22 of the present embodiment is provided with a guide tapered surface 24 that gradually expands from inside the sleeve 22 to outside the sleeve 22 near one end of the holding portion 10. The guiding conical surface 24 facilitates the matching of the sleeve 22 and the elastic connecting rod 23, so that the opening and clamping of the first clamping arm 11 and the second clamping arm 12 are effectively controlled. When the sleeve 22 moves close to the clamping part 10, the guide conical surface 24 contacts with the elastic connecting rod 23 and overcomes the elastic force of the elastic connecting rod 23, so that the first clamping arm 11 and the second clamping arm 12 are close to each other, and the intervertebral disc prosthesis can be clamped. When the sleeve 22 moves away from the clamping part 10, the guide conical surface 24 is separated from the elastic connecting rod 23, and the elastic connecting rod 23 is restored under the action of self elastic force, so that the first clamping arm 11 and the second clamping arm 12 are separated from each other, and the intervertebral disc prosthesis can be loosened.

Further, as shown in fig. 4 to 7, the sleeve 22 of the present embodiment is connected to the rod body 21 by a screw structure, and the screw structure gradually moves the sleeve 22 toward or away from the clamping portion 10, so as to facilitate adjustment of the clamping force applied to the intervertebral disc prosthesis. And the self-locking of the sleeve 22 can be realized by adjusting the pitch, the taper and other factors of the thread structure, so that the sleeve 22 can be kept at one position without manual control after moving to the position.

The first end of the rod 21 is provided with an elastic connecting rod 23, the second end is provided with a handle for a user to grasp and bear the impact, and the middle part of the rod 21 is provided with threads matched with the sleeve 22. The diameter of the handle is larger to withstand more force. The first end of the sleeve 22 is provided with a guiding conical surface, the inner surface of the second end is provided with a thread structure matched with the thread on the rod body 21, and the outer surface of the second end corresponding to the thread structure is provided with a holding structure which is convenient for a user to apply force. Preferably, a distance of at least 120mm is left between the holding structure and the guiding conical surface, so that the holding part can be kept outside human tissues all the time and is not shielded by the human tissues.

From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

the first and second clamp arms limit free movement of the intervertebral disc prosthesis when the clamping portion of the intervertebral disc prosthesis holder clamps the intervertebral disc prosthesis. The first retaining part and the second retaining part extend into the gap between the first end plate and the second end plate, so that the first end plate is prevented from swinging relative to the second end plate, the first end plate and the second end plate keep a preset relative position in the moving process, and further the intervertebral disc prosthesis can be placed into a patient according to a preset shape, and the skew of the intervertebral disc prosthesis is avoided to influence the normal life of a user.

In the description of the present invention, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present invention; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present invention.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. Intervertebral disc prosthesis holder for grasping and moving an intervertebral disc prosthesis comprising a first endplate (70) and a second endplate (80) arranged opposite each other and a nucleus (90) arranged between the first endplate (70) and the second endplate (80), characterized in that the intervertebral disc prosthesis holder comprises a clamping part (10) for fixing the intervertebral disc prosthesis, the clamping part (10) comprises two oppositely arranged first clamping arms (11) and second clamping arms (12), the intervertebral disc prosthesis can be clamped between the first clamping arms (11) and the second clamping arms (12), the first clamping arms (11) are provided with first clamping parts (13) and the second clamping arms (12) are provided with second clamping parts (14), and the first clamping parts (13) and the second clamping parts (14) can both extend into a gap between the first endplate (70) and the second endplate (80) for keeping the first endplate (80) in a predetermined position during movement;

the clamping part (10) further comprises a pushing part (15), the pushing part (15) is arranged at the rear ends of the first clamping arm (11) and the second clamping arm (12), and when the intervertebral disc prosthesis is fixed in the clamping part (10), the pushing part (15) is simultaneously contacted with the first end plate (70) and the second end plate (80).

2. Intervertebral disc prosthesis holder according to claim 1, wherein the first holding part (13) comprises a first holding structure (131) and a second holding structure (132) arranged at intervals, the second holding part (14) comprises a third holding structure (141) and a fourth holding structure (142) arranged at intervals, the first holding structure (131) and the third holding structure (141) are arranged opposite each other, the second holding structure (132) and the fourth holding structure (142) are arranged opposite each other, and the center of the nucleus pulposus (90) is located between the first holding structure (131) and the second holding structure (132) when the intervertebral disc prosthesis is fixed in the clamping part (10).

3. Intervertebral disc prosthesis holder according to claim 2, wherein the first retaining structure (131) and the second retaining structure (132) are first retaining tabs extending from the first clamping arm (11) to the second clamping arm (12), and the third retaining structure (141) and the fourth retaining structure (142) are second retaining tabs extending from the second clamping arm (12) to the first clamping arm (11).

4. Intervertebral disc prosthesis holder according to claim 1, wherein the pushing portion (15) is arranged curved and protrudes inwards, wherein the inwardly protruding portion of the pushing portion (15) is adapted to contact the first endplate (70) and the second endplate (80).

5. Intervertebral disc prosthesis holder according to claim 1, characterized in that the intervertebral disc prosthesis holder further comprises a grip part (20) connected to the gripping part (10), the grip part (20) comprising a rod body (21), a sleeve (22) sleeved on the rod body (21) and an elastic link (23) connecting the rod body (21) and the pushing part (15), the sleeve (22) being slidable relative to the rod body (21), the elastic link (23) comprising a first link (231) arranged in correspondence of the first and second gripping arms (11, 12) and a second link (232) in correspondence of the second gripping arms (12), the first link (231) and the second link (232) being brought into proximity when the sleeve (22) is brought into proximity to the gripping part (10), the first link (231) and the second link (232) being separated when the sleeve (22) is brought away from the gripping part (10).

6. Intervertebral disc prosthesis holder according to claim 5, characterized in that the end of the sleeve (22) adjacent to the clamping portion (10) is provided with a guiding cone (24) which gradually expands from inside the sleeve (22) to outside the sleeve (22).

7. Intervertebral disc prosthesis holder according to claim 5, characterized in that the sleeve (22) is connected to the rod body (21) by a screw structure.

8. Intervertebral disc prosthesis holder according to claim 1, characterized in that the first clamping arm (11) is further provided with a first encircling structure to limit the intervertebral disc prosthesis from moving back and forth relative to the clamping portion (10).

9. Intervertebral disc prosthesis holder according to claim 1, characterized in that the first clamping arm (11) is further provided with a second encircling structure to limit the up-and-down movement of the intervertebral disc prosthesis relative to the clamping portion (10).