Artificial vertebral implant capable of maintaining certain range of motion

Abstract

The utility model discloses an artificial vertebral body implant capable of maintaining a certain range of motion, which comprises an implant upper part, an implant lower part and an implant upper part, the implant lower part is provided with a connecting part, and the connecting part extends into the connecting hole so as to realize the connection between the implant upper part and the implant lower part; the elastic washer is arranged between the implant upper part and the implant lower part, the elastic washer is provided with a through hole matched with the connecting part and a ball head, the ball head is connected with the connecting part and a spherical groove, the spherical groove is formed in the implant upper part, the spherical groove is communicated with the connecting hole, and the spherical groove is matched with the ball head. The connecting part only extends into the connecting hole, and the elastic gasket can deform under the action of natural stress of the spine, namely, the implant upper part and the implant lower part can slightly and vertically move under the action of natural stress. And through the spherical contact between the ball head and the spherical groove, the implant upper part and the implant lower part can generate relative rotation, so that the range of motion of the artificial vertebral implant is further improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of vertebral body implants, in particular to an artificial vertebral body implant capable of maintaining a certain range of motion. BACKGROUND

[0002] For intervertebral disc degenerative diseases, spondylolisthesis, vertebral body instability and other diseases, the usual surgery is to implant a vertebral body implant for fusion on one or two adjacent vertebral segments. The deficiency is that the vertebral body implant is rigid and appears stiff after fusion with the original spine, and cannot restore the original spine function. SUMMARY

[0003] The utility model solves the technical problems that the utility model provides an artificial vertebral body implant capable of maintaining a certain range of motion to solve the problem that the existing vertebral body implant is rigid and appears stiff after fusion with the original spine, and cannot restore the original spine function.

[0004] The utility model solves the technical problems that the utility model provides an artificial vertebral body implant capable of maintaining a certain range of motion to solve the problem that the existing vertebral body implant is rigid and appears stiff after fusion with the original spine, and cannot restore the original spine function.

[0005] The utility model has the advantages that the implant upper part, implant lower part and elastic washer are combined to form an artificial vertebral body implant, and the artificial vertebral body implant is used for implanting on adjacent vertebral segments of the human body. After implantation, the artificial vertebral body implant can be fine-tuned according to the natural stress state of the spine, and after fusion of the artificial vertebral body implant, there is no obvious difference with the normal spine. In detail, the connecting part only extends into the connecting hole, and the elastic washer can deform under the natural stress of the spine, that is, the implant upper part and the implant lower part can move vertically under the action of natural stress.

[0006] Preferably, it further comprises:

[0007] A ball head is connected to the connecting part.

[0008] A spherical groove is arranged on the implant upper part, and the spherical groove is connected to the connecting hole and is adapted to the ball head.

[0009] Preferably, a first circular arc transition part is arranged between the ball head and the connecting part, and a second circular arc transition part is arranged between the connecting part and the implant lower part.

[0010] Preferably, the upper part of the implant is provided with a plurality of protrusions at intervals away from the lower part of the implant, and the lower part of the implant is provided with a plurality of protrusions at intervals away from the upper part of the implant.

[0011] Preferably, the implant further comprises:

[0012] An opening is provided in the elastic gasket.

[0013] Preferably, the opening is provided in an inclined manner. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 A schematic view of the three-dimensional structure of the artificial vertebral body implant capable of maintaining a certain degree of mobility;

[0015] Figure 2 A sectional view of the artificial vertebral body implant capable of maintaining a certain degree of mobility;

[0016] Figure 3 A Figure 2 A partial enlarged view of A in the middle;

[0017] Figure 4 A Figure 2 A partial enlarged view of B in the middle;

[0018] Figure 5 A schematic view of the three-dimensional structure of the elastic gasket.

[0019] In the figure: implant upper part 1, implant lower part 2, elastic gasket 3, protrusion 4, ball head 5, spherical surface groove 6, connecting hole 7, connecting part 8, first circular arc transition part 9, second circular arc transition part 10, opening 11, through hole 12. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the technical scheme of the present application, the present application will be further described in detail below in conjunction with the drawings and specific embodiments.

[0021] In this document, the terms "upper", "lower", "inner", "outer" and the like are established based on the positional relationship shown in the drawings, and according to different drawings, the corresponding positional relationship may also change accordingly, therefore, it cannot be understood as an absolute limitation on the scope of protection; moreover, relationship terms such as "first" and "second" are only used to distinguish one component from another component with the same name, and do not necessarily require or imply any such actual relationship or order between the components.

[0022] EMBODIMENT

[0023] As Figures 1-5The artificial vertebral body implant capable of maintaining a certain degree of activity includes: an upper implant portion provided with a connecting hole; a lower implant portion provided with a connecting portion extending into the connecting hole to realize the connection of the upper implant portion and the lower implant portion; and an elastic washer provided between the upper implant portion and the lower implant portion and provided with a through hole matched with the connecting portion.

[0024] Specifically, the upper implant portion, the lower implant portion and the elastic washer combine to form the artificial vertebral body implant, which is used to be implanted on adjacent vertebral segments of the human body. After implantation, the artificial vertebral body implant can be fine-tuned according to the natural stress state of the spine, and after fusion of the artificial vertebral body implant, there is no significant difference with the normal spine. In detail, the connecting portion only extends into the connecting hole, and the elastic washer can deform under the natural stress of the spine, that is, the upper implant portion and the lower implant portion can move vertically under the action of natural stress.

[0025] Further, it further includes: a ball head connected to the connecting portion; and a spherical groove provided on the upper implant portion and communicating with the connecting hole, the spherical groove being matched with the ball head. When the elastic washer is in a normal state, the ball head abuts against the spherical groove, and the spherical contact between the ball head and the spherical groove allows the upper implant portion and the lower implant portion to rotate relative to each other, further improving the degree of activity of the artificial vertebral body implant.

[0026] Further, a first circular arc transition portion is provided between the ball head and the connecting portion, and a second circular arc transition portion is provided between the connecting portion and the lower implant portion. The first circular arc transition portion and the second circular arc transition portion can effectively avoid stress concentration and enhance the service life of the artificial vertebral body implant.

[0027] Further, a plurality of protrusions are provided at an end of the upper implant portion away from the lower implant portion, and a plurality of protrusions are provided at an end of the lower implant portion away from the upper implant portion. The protrusions are used to increase the contact area of the upper implant portion and the lower implant portion with the vertebral body, so that they are more easily fused.

[0028] Further, it further includes: an opening provided on the elastic washer. The opening is provided to make the elastic washer more easily placed between the upper implant portion and the lower implant portion.

[0029] Further, the opening is obliquely provided. The oblique arrangement of the opening can effectively avoid the weakness of the elastic washer at a certain angle, and by obliquely arranging the opening, the overall strength of the elastic washer can be improved.

[0030] The above-described technical features can be combined in any manner. For the sake of brevity, not all possible combinations are described, but it is to be understood that the scope of the present specification includes all possible combinations.

Claims

1. A prosthetic vertebral body implant that can maintain a certain degree of mobility, characterized in that, The implant upper part is provided with a connecting hole. The implant lower part is provided with a connecting part which extends into the connecting hole to realize the connection of the implant upper part and the implant lower part. An elastic gasket is arranged between the implant upper part and the implant lower part, and the elastic gasket is provided with a through hole which is adapted to the connecting part. Further comprising:

2. The activity-maintaining artificial vertebral body implant according to claim 1, characterized in that A ball head which connects the connecting part; A spherical surface groove which is arranged on the implant upper part, and the spherical surface groove is communicated with the connecting hole and is adapted to the ball head. A first circular arc transition part is arranged between the ball head and the connecting part, and a second circular arc transition part is arranged between the connecting part and the implant lower part.

3. The activity-maintaining artificial vertebral body implant according to claim 2, characterized in that A plurality of protrusions are arranged at an end of the implant upper part away from the implant lower part, and a plurality of protrusions are arranged at an end of the implant lower part away from the implant upper part.

4. The activity-maintaining artificial vertebral body implant according to claim 1, characterized in that Further comprising:

5. The activity-maintaining artificial vertebral body implant according to claim 1, characterized in that An opening which is arranged on the elastic gasket. The opening is arranged obliquely.

6. The activity-maintaining artificial vertebral body implant according to claim 5, characterized in that ​

Images