Anti-dislocation artificial vertebral body implant

Abstract

The utility model discloses an anti-dislocation artificial vertebral body implant which is provided with two end surfaces along the vertical direction, one end surface is contacted with an upper vertebral body, and the other end surface is contacted with a lower vertebral body; the limiting part is arranged on the end face, the limiting part comprises a pair of limiting plates, a limiting space is formed between the two limiting plates in the same pair, and the upper cone or the lower cone is arranged in the limiting space. The threaded hole is formed in the limiting plate; and the locking bone screws are matched with the threaded holes. The artificial vertebral body implant is used for being implanted into a vertebral body and is finally fused to form a part of the vertebral body. After the artificial vertebral body implant is implanted, the locking bone screw is rigidly connected with the upper vertebral body and the lower vertebral body through the locking bone screw and the limiting plate, and it is guaranteed that the artificial vertebral body implant does not shift when a patient moves moderately. And the stability of the artificial vertebral body implant is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of vertebral body implants, in particular to an anti-dislocation artificial vertebral body implant. BACKGROUND

[0002] For intervertebral disc degenerative diseases, spondylolisthesis, vertebral body instability and other diseases, the usual operation is to implant a vertebral body implant for fusion on one or two adjacent vertebral segments. The deficiency is that when the patient recovers, the vertebral body implant may be displaced due to bending, walking and normal life activities. SUMMARY

[0003] The technical problem to be solved by the utility model is that the utility model provides an anti-dislocation artificial vertebral body implant 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 technical scheme adopted by the utility model to solve the technical problem is: an anti-dislocation artificial vertebral body implant, comprising: an artificial vertebral body implant, the artificial vertebral body implant is provided with two end faces in the vertical direction, one end face contacts the upper vertebra, and the other end face contacts the lower vertebra; a limiting part, the limiting part is arranged on the end face, and the limiting part comprises a pair of limiting plates, a limiting space is formed between the two limiting plates of the same pair, and the upper vertebra or the lower vertebra is arranged in the limiting space.

[0005] The artificial vertebral body implant is used for implanting into the vertebra and finally fusing to form part of the vertebra. After the artificial vertebral body implant is implanted, the vertical degree of freedom thereof is limited by the upper vertebra and the lower vertebra, and the left-right degree of freedom thereof is limited by the pair of limiting plates, so that the artificial vertebral body implant is prevented from being displaced due to bending, walking and normal life activities when the patient recovers, and the stability of the artificial vertebral body implant is improved.

[0006] Preferably, it further comprises:

[0007] A threaded hole is arranged on the limiting plate.

[0008] A locking bone screw is adapted to the threaded hole.

[0009] Preferably, it further comprises:

[0010] A screw groove is arranged on the locking bone screw, and the screw groove is in the shape of a plum blossom.

[0011] Preferably, the end face is a rough surface.

[0012] Preferably, the cross-sectional shape of the limiting plate is in the shape of a rectangle.

[0013] Or, the cross-sectional shape of the limiting plate is in the shape of a trapezoid.

[0014] Or, the cross-sectional shape of the limiting plate is arc-shaped.

[0015] Preferably, further comprising:

[0016] A gasket is arranged between the locking bone screw and the limiting plate, and the gasket is provided with a through hole matched with the locking bone screw. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of an anti-dislocation artificial vertebral body implant;

[0018] Figure 2 It is Figure 2 It is a local enlarged view of A in the middle;

[0019] Figure 3 It is a top view of another anti-dislocation artificial vertebral body implant;

[0020] Figure 4 It is a schematic diagram of the three-dimensional structure of another anti-dislocation artificial vertebral body implant.

[0021] In the figure: artificial vertebral body implant 1, limiting plate 2, end face 3, locking bone screw 4, gasket 5, through hole 6, screwing groove 7. DETAILED DESCRIPTION

[0022] 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.

[0023] In this article, the terms "up, down, in, out" are established based on the positional relationship shown in the drawings, and according to the 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, the relationship terms such as "first" and "second" are only used to distinguish one part from another part with the same name, and do not necessarily require or imply any such actual relationship or order between the parts.

[0024] EMBODIMENT

[0025] As Figures 1-2 shown, an anti-dislocation artificial vertebral body implant, comprising: an artificial vertebral body implant 1, the artificial vertebral body implant 1 is provided with two end faces 3 along the vertical direction, one end face 3 contacts the upper vertebral body, and the other end face 3 contacts the lower vertebral body; a limiting part, the limiting part is arranged on the end face 3, and the limiting part comprises a pair of limiting plates 2, the limiting space is formed between the two limiting plates 2 of the same pair, and the upper vertebral body or the lower vertebral body is arranged in the limiting space.

[0026] Specifically, the artificial vertebral body implant 1 is used to be implanted into the vertebral body and finally fused to form part of the vertebral body. After the artificial vertebral body implant 1 is implanted, its vertical degree of freedom is limited by the upper and lower vertebral bodies, and its left and right degrees of freedom are limited by a pair of limiting plates 2, so as to avoid the displacement of the vertebral body implant due to bending, walking and normal life activities when the patient recovers the activity, thereby improving the stability of the artificial vertebral body implant 1.

[0027] Further, it further comprises a threaded hole provided on the limiting plate 2, and a locking bone screw 4 adapted to the threaded hole. By means of the locking bone screw 4 and the limiting plate 2, a rigid connection is generated between the locking bone screw 4 and the upper and lower vertebral bodies, so as to ensure that the artificial vertebral body implant 1 will not be displaced in moderate movement of the patient. Further, the stability of the artificial vertebral body implant 1 is improved.

[0028] Further, it further comprises a screwing groove 7 provided on the locking bone screw 4, and the screwing groove 7 is in the shape of a quincunx. The screwing groove 7 is used to screw the locking bone screw 4, and specifically, a screwing tool adapted to the screwing groove 7 is used to screw the locking bone screw 4, so as to embed it into the upper or lower vertebral body.

[0029] Further, the end face 3 is a rough surface. The rough surface is beneficial to the fusion of the artificial vertebral body implant 1 and the vertebral body. Preferably, a plurality of protrusions are arranged on the end face 3 at intervals.

[0030] As shown in Figure 1 , 4 Further, the cross-sectional shape of the limiting plate 2 is in the shape of a rectangle; or, the cross-sectional shape of the limiting plate 2 is in the shape of a trapezoid; or, the cross-sectional shape of the limiting plate 2 is in the shape of an arc. In the embodiment, the specific cross-sectional shape of the limiting plate 2 is not limited, and preferably, the cross-sectional shape of the limiting plate 2 is in the shape of a trapezoid or an arc, and the size of the limiting plate 2 gradually decreases in the direction away from the artificial vertebral body implant 1. The part of the limiting plate 2 in contact with the artificial vertebral body implant 1 is subjected to a greater force, and by making the size of the connecting part a little larger, it is beneficial to avoid damage to the limiting plate 2.

[0031] As shown in Figure 3 Further, it further comprises a gasket 5 provided between the locking bone screw 4 and the limiting plate 2, and the gasket 5 is provided with a through hole 6 adapted to the locking bone screw 4. The gasket 5 has a plurality of specifications, and the thicknesses of the gaskets 5 of different specifications are different, which can be selected according to the actual situation.

[0032] The above technical features can be combined arbitrarily, and in order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present disclosure.

Claims

1. A spondylolisthesis-preventing artificial vertebral body implant, characterized in that Comprise: An artificial vertebral body implant (1) is provided with two end faces (3) in the vertical direction, one end face (3) contacts the upper vertebral body, and the other end face (3) contacts the lower vertebral body; A limiting part is provided on the end face (3), which comprises a pair of limiting plates (2), and the two limiting plates (2) of the same pair form a limiting space, and the upper vertebral body or the lower vertebral body is placed in the limiting space.

2. The anti-dislodgement artificial vertebral body implant of claim 1, wherein, Also include: A threaded hole is provided on the limiting plate (2); A locking bone screw (4) is adapted to the threaded hole.

3. The anti-dislodgement artificial vertebral body implant of claim 2, wherein, Also include: A screw groove (7) is provided on the locking bone screw (4), and the screw groove (7) is in the shape of a torx.

4. The anti-dislodgement artificial vertebral body implant of claim 1, wherein, The end face (3) is a rough surface.

5. The anti-dislodgement artificial vertebral body implant of claim 1, wherein, The cross-sectional shape of the limiting plate (2) is rectangular; Or, the cross-sectional shape of the limiting plate (2) is trapezoidal; Or, the cross-sectional shape of the limiting plate (2) is arc-shaped.

6. The anti-dislodgement artificial vertebral body implant of claim 2, wherein, Also include: A gasket (5) is provided between the locking bone screw (4) and the limiting plate (2), and the gasket (5) is provided with a through hole (6) adapted to the locking bone screw (4).

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