CN219461550U

CN219461550U - Self-stabilizing interbody fusion cage

Info

Publication number: CN219461550U
Application number: CN202320762202.4U
Authority: CN
Inventors: 焦增肖; 郭谦
Original assignee: Beijing Keyi Bangen Medical Devices Technology Co ltd
Current assignee: Beijing Keyi Bangen Medical Devices Technology Co ltd
Priority date: 2023-04-08
Filing date: 2023-04-08
Publication date: 2023-08-04
Anticipated expiration: 2033-04-08

Abstract

The utility model relates to a self-stabilizing intervertebral fusion device, which relates to the technical field of intervertebral fusion implants and comprises a fusion device body and connecting screws connected to the fusion device body, wherein the fusion device body comprises a front wall, a rear wall, a left wall and a right wall, the middle of the front wall, the rear wall and the rear wall enclose a bone grafting area, two connecting holes penetrating through the rear wall are formed in the rear wall, the two connecting holes incline upwards and downwards respectively, one connecting screw is arranged in each connecting hole in a penetrating way, the aperture of each connecting hole is matched with the shape of the connecting screw or the aperture of each connecting hole is larger than the shape of the connecting screw, so that the connecting screw can be fixed or swing to adjust an angle in each connecting hole. The connecting screw can be connected to the middle position of the upper and lower adjacent vertebrae, so that the fusion cage body is connected more stably and firmly, and the damage to the vertebrae is reduced. The intervertebral fusion device has better stability, and is also beneficial to the fusion of the bone tissue of the centrum and autologous bone or allogeneic bone in the fusion device.

Description

Self-stabilizing interbody fusion cage

Technical Field

The utility model relates to the technical field of intervertebral fusion implants, in particular to a self-stabilizing intervertebral fusion device.

Background

The self-stabilizing type interbody fusion cage consists of an interbody fusion cage and accessory screws of the interbody fusion cage, and has the functions of maintaining interbody height, enhancing local stability, improving fusion rate and the like.

The stability of the fusion cage after being implanted into a human body cannot be ensured by the PEEK interbody fusion cage used at present, and the fusion of the bone tissue of the vertebral body and autologous bone or allogeneic bone in the bone implantation bin of the fusion cage is not facilitated.

Disclosure of Invention

The utility model aims to provide a self-stabilizing type interbody fusion cage which has better stability and is also beneficial to the fusion of bone tissues of vertebral bodies and autologous or allogenic bone in the interbody fusion cage.

The utility model provides a self-stabilizing interbody fusion cage which adopts the following technical scheme:

the utility model provides a from steady type interbody fusion cage, includes the fusion cage body and connects the connecting screw on the fusion cage body, and the fusion cage body is including the middle front wall, the back wall of enclosing into the bone grafting district, left wall and right wall, has seted up two connecting holes that run through the back wall on the back wall, and two connecting holes are upwards and downward sloping respectively, all wear to be equipped with a connecting screw in two connecting holes.

Through adopting above-mentioned technical scheme, when using, insert the interbody fusion cage body between two sections vertebrae, play certain supporting role, the bone grafting district of centre is favorable to the interbody fusion between the vertebral bodies, and two connecting screw upwards and downward sloping respectively are fixed the self-stabilizing structure that realizes the interbody fusion cage with the cage body in the angle, can replace traditional backbone nail stick system + PEEK thoracolumbar vertebrae fusion cage, improves the stability when interbody fusion cage uses.

Optionally, the hole diameters of the two connecting holes are matched with the shape of the connecting screw or the hole diameters of the connecting holes are larger than the shape of the connecting screw, so that the connecting screw can be internally fixed or swing in the connecting hole to adjust the angle.

By adopting the technical scheme, when the connecting screw is fixed at an angle in the connecting hole, the fusion cage body can be firmly and stably connected with the vertebral structure; the angle of the connecting screw in the connecting hole is adjustable, so that the application range of the fusion cage body is wider, the installation and the use are more flexible, and the fusion cage body is better connected between vertebrae.

Optionally, an instrument hole is formed in the rear wall and located between the two connecting holes, a nail pressing cap is installed in the instrument hole, and the nail pressing cap abuts against a nut of the connecting screw from the rear end of the connecting screw.

Through adopting above-mentioned technical scheme, press the nail cap can be with the binding screw confinement in the connecting hole, prevents that the condition of moving back the nail from appearing in the binding screw, improves the security and the stability of fusion ware.

Optionally, the left wall and the right wall are provided with hollow holes penetrating through the inner side and the outer side, the hollow Kong Mibu is arranged on the left wall and the right wall, and the hollow holes are arranged into irregularly-shaped porous structures.

Through adopting above-mentioned technical scheme, set up the fretwork hole that runs through inside and outside on left wall and the right wall for adjust elastic modulus.

Optionally, a plurality of connecting holes arranged in the vertical direction are formed in the left wall and the right wall, and the connecting holes are communicated with the hollow holes in the same direction.

By adopting the technical scheme, the irregular and unordered porous structures on the left wall and the right wall are closer to the bone structure of the human body, thereby being beneficial to the bone growth between vertebrae and adjusting the elastic modulus.

Optionally, a support body is arranged in the porous structures of the left wall and the right wall, and a central hole penetrating through the left wall and the right wall is arranged in the center of the support body.

Through adopting above-mentioned technical scheme, unordered porous structure supporter structural design of irregularity can strengthen the support intensity of left wall and right wall, conveniently adjusts elastic modulus.

Optionally, the front wall, the back wall, the left wall and the right wall are of an integrated structure, the top surfaces and the bottom surfaces of the left wall and the right wall are respectively provided with fixed teeth, and the tops of the fixed teeth are provided with tips and incline towards the direction of the back wall.

Through adopting above-mentioned technical scheme, the integration structure of integration ware body makes things convenient for 3D to print processing, improves the processing technology of interbody fusion cage, makes things convenient for the installation of interbody fusion cage simultaneously. The fixing teeth facilitate the connection and fixation between the fusion device body and the vertebrae, and play a role in skid resistance.

Optionally, the upper and lower surfaces of the left wall and the right wall are convex curved surfaces, and the thicknesses of the left wall and the right wall in the up-down direction are different.

Through adopting above-mentioned technical scheme, the structure of left wall and right wall accords with anatomical design, can conveniently be applied to the interbody fusion of thoracolumbar vertebra with the fusion ware, makes the fusion ware body install from the lateral route of thoracolumbar vertebra convenience.

Optionally, the lower surfaces of the left wall and the right wall are plane, the upper surface is a convex curved surface, and the thicknesses of the left wall and the right wall in the up-down direction are the same.

Through adopting above-mentioned technical scheme, the structural design of left wall and right wall can conveniently be applied to the interbody fusion of cervical vertebra with the fusion ware, makes the fusion ware body install from the anterior approach of cervical vertebra convenience.

In summary, the present utility model includes at least one of the following beneficial technical effects:

1. the fusion cage body is inserted between two vertebrae to play a certain supporting role, the middle bone grafting area is favorable for fusion between vertebrae, the two connecting screws incline upwards and downwards respectively and are fixed at an angle with the fusion cage body to realize the self-stabilizing structure of the intervertebral fusion cage, the traditional spinal nail rod system and the PEEK thoracolumbar fusion cage can be replaced, and the stability of the intervertebral fusion cage during use is improved.

2. When the connecting screw is fixed at the inner angle of the connecting hole, the connection between the fusion cage body and the vertebral structure can be more firm and stable; the angle of the connecting screw in the connecting hole is adjustable, so that the application range of the fusion cage body is wider, the installation and the use are more flexible, and the fusion cage body is better connected between vertebrae.

3. The unordered porous structure of irregularity makes left wall and right wall's elastic modulus reduce easily, and cooperation porous structure after the supporter increases can strengthen the support intensity of left wall and right wall, and conveniently adjusts elastic modulus.

Drawings

FIG. 1 is a schematic view showing the overall structure of an interbody cage according to embodiment 1 of the present utility model;

FIG. 2 is a schematic view showing the structure of a cage body according to embodiment 1 of the present utility model;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

FIG. 4 is a schematic side view of the cage body of embodiment 2 of the present utility model;

FIG. 5 is a schematic top view of the cage body of embodiment 2 of the present utility model;

FIG. 6 is a schematic view showing the structure of the lower side view of the cage body according to embodiment 3 of the present utility model;

in the figure, 1, a fusion cage body; 100. a bone grafting area; 11. a front wall; 12. a rear wall; 13. a left wall; 14. a right wall; 15. a connection hole; 16. an instrument hole; 17. a hollowed hole; 18. a connection hole; 19. a fixed tooth; 2. a connecting screw; 3. pressing a nail cap; 4. a support body.

Detailed Description

The present utility model will be described in further detail with reference to fig. 1 to 6.

Example 1: referring to fig. 1 and 2, the self-stabilizing interbody fusion cage comprises a cage body 1, a connecting screw 2 and a screw cap 3, wherein the connecting screw 2 and the screw cap 3 are both installed on the cage body 1, the connecting screw 2 is connected with vertebrae on the upper side and the lower side, the cage body 1 is connected with the vertebrae, and the installation stability of the interbody fusion cage is improved.

The fusion device body 1 comprises a front wall 11, a rear wall 12, a left wall 13 and a right wall 14, wherein the front wall 11, the rear wall 12, the left wall 13 and the right wall 14 are integrally formed, titanium alloy materials are selected, 3D printing technology is adopted for processing and forming, the middle is enclosed to form a bone grafting area 100 with an upper opening and a lower opening, the lengths of the left wall 13 and the right wall 14 are larger in the embodiment, the whole fusion device body 1 is in a strip shape, the thicknesses of the front end and the rear end are smaller, the thickness of the middle is larger, and the fusion device body 1 is conveniently inserted into an intervertebral gap. The upper and lower surfaces of the left wall 13 and the right wall 14 are arranged to be convex curved surfaces, and the thicknesses of the left wall 13 and the right wall 14 in the up-down direction are different, namely, one thickness is large, the other thickness is small, the fusion device can be conveniently applied to the interbody fusion of the thoracolumbar, and the fusion device body 1 is convenient to install from the lateral route of the thoracolumbar.

The thickness of the front wall 11 is minimum, the intervertebral is conveniently implanted, two connecting holes 15 penetrating through the rear wall 12 are formed in the rear wall 12, two ends of the rear wall 12 of the two connecting holes 15 are respectively inclined upwards and downwards in the direction of the bone grafting area 100, the projections of the axes extending in the bone grafting area 100 of the two connecting holes 15 on the horizontal plane are mutually crossed, and one connecting screw 2 is respectively penetrated in the two connecting holes 15, so that the end parts of the two connecting screws 2 are closer to the central axis of the fusion device body 1 in the vertical direction, and the connecting screws 2 can be connected at the middle positions of the vertebrae adjacent up and down.

In this embodiment, the apertures of the two connecting holes 15 are adapted to the outer diameter shape of the connecting screw 2, so that the connecting screw 2 can be fixed at the inner angle in the connecting hole 15, and the fusion cage body 1 can be connected with the vertebral structure more firmly and stably. In another embodiment of the utility model, the aperture of the connecting hole 15 is larger than the outer diameter of the connecting screw 2, so that the connecting screw 2 can swing in the connecting hole 15 to adjust the angle, and the connecting screw 2 is more flexible to install and use and better connected between vertebrae. In order to facilitate the rotation of the connecting screw 2, the inner side of the nut of the connecting screw 2 is set to be a spherical surface, and the outer end of the connecting hole 15 is also set to be a spherical surface, so that the nut of the connecting screw 2 rotates in the connecting hole 15, and the placement angle of the connecting screw 2 is adjusted.

The position that is located the centre of two connecting holes 15 on the back wall 12 is provided with instrument hole 16, the axis direction of instrument hole 16 is the same with the length direction of fusion ware body 1, make instrument hole 16 just to the direction intercommunication of front wall 11 in bone grafting district 100, detachably installs the nail pressing cap 3 in the instrument hole 16 in this embodiment, the pore wall threaded connection or the joint of nail pressing cap 3 and instrument hole 16, nail pressing cap 3 supports tightly on the nut of connecting screw 2 from connecting screw 2 rear end, with connecting screw 2 confinement in connecting hole 15, prevent that the condition of moving back the nail from appearing in connecting screw 2, improve the security and the stability of fusion ware.

The left wall 13 and the right wall 14 are of plate-shaped structures, the thickness of the two ends in the vertical direction is smaller than that of the middle, a plurality of regularly ordered hollowed holes 17 are densely distributed on the left wall 13 and the right wall 14, the hollowed holes 17 penetrate through the inner side and the outer side of the left wall 13 and the right wall 14 and are communicated with each other in the bone grafting area 100, the cross section of each hollowed hole 17 in the embodiment is rectangular, one edge angle is positioned at the top and one edge angle is positioned at the bottom, the fusion device body 1 forms a porous structure, the bone grafting area 100 inside is convenient to see through, bone growth is facilitated, and the fusion device body 1 is enabled to be closer to the elastic modulus of human bones.

Referring to fig. 2 and 3, in order to further enhance the performance of the left wall 13 and the right wall 14, a plurality of parallel connection holes 18 are formed in the left wall 13 and the right wall 14, the connection holes 18 are round holes, the upper end and the lower end are sealed, the axial direction is perpendicular to the axial direction of the left wall 13 and the right wall 14, and the hollow holes 17 in the same vertical direction can be communicated.

In this embodiment, fixing teeth 19 are further disposed on the top and bottom surfaces of the left wall 13 and the right wall 14, the fixing teeth 19 extend to two ends of the left wall 13 and the right wall 14, the top of the fixing teeth 19 is provided with a tip, and the fixing teeth 19 incline in the direction of the rear wall 12, so that the fusion device body 1 is gripped between the vertebrae by using the fixing teeth 19, and the fusion device body 1 is not easy to fall off.

Example 2: referring to fig. 4 and 5, the present embodiment is different from embodiment 1 in that the hollowed holes 17 are provided in an irregularly shaped porous structure, and the hollowed holes 17 extend to the upper and lower surfaces of the front wall 11, the rear wall 12, the left wall 13 and the right wall 14, so that the cage body 1 is closer to the bone structure of the human body, which is advantageous for bone growth between vertebrae and elastic modulus adjustment.

In order to enhance the elastic modulus of the left wall 13 and the right wall 14, the inside of the porous structure is provided with a cylindrical supporting body 4, the left wall 13 and the right wall 14 are of an integrated structure, a central hole penetrating the left wall 13 and the right wall 14 is formed in the center of the supporting body 4, after the supporting body 4 is increased, the supporting strength of the left wall 13 and the right wall 14 can be enhanced, and the elastic modulus of the fusion device body 1 can be conveniently adjusted.

Example 3; referring to fig. 6, this embodiment is different from embodiment 1 in that the lower surfaces of the left wall 13 and the right wall 14 are provided as planes, the upper surfaces are provided as upwardly convex curved surfaces, and the thicknesses of the left wall 13 and the right wall 14 in the up-down direction are the same, and the heights of the tips of the fixing teeth 19 on the lower surfaces of the left wall 13 and the right wall 14 are also the same, so that the fusion cage can be conveniently applied to the interbody fusion of the cervical vertebrae, and the fusion cage body 1 is conveniently installed from the anterior approach of the cervical vertebrae.

The embodiments of the present utility model are all preferred embodiments of the present utility model, and are not intended to limit the scope of the present utility model, wherein like reference numerals are used to refer to like elements throughout. Therefore: all equivalent changes in structure, shape and principle of the utility model should be covered in the scope of protection of the utility model.

Claims

1. The utility model provides a from steady intervertebral fusion ware, its characterized in that, including fusion ware body (1) and connect connecting screw (2) on fusion ware body (1), fusion ware body (1) are including middle front wall (11), back wall (12), left wall (13) and right wall (14) of enclosing into bone grafting district (100), have seted up two connecting hole (15) that run through back wall (12) on back wall (12), and two connecting hole (15) are upwards and downward sloping respectively, all wear to be equipped with one connecting screw (2) in two connecting hole (15).

2. A self-stabilizing interbody fusion cage according to claim 1, characterized in that the apertures of the two connecting holes (15) are adapted to the shape of the connecting screw (2) or the aperture of the connecting hole (15) is larger than the outer shape of the connecting screw (2), so that the connecting screw (2) can be fixed at an angle or swing in the connecting hole (15) by an adjustment angle.

3. The self-stabilizing interbody fusion cage according to claim 2, wherein an instrument hole (16) is formed in the rear wall (12) at a position between the two connecting holes (15), a nail pressing cap (3) is mounted in the instrument hole (16), and the nail pressing cap (3) abuts against a nut of the connecting screw (2) from the rear end of the connecting screw (2).

4. The self-stabilizing interbody fusion cage according to claim 1, wherein the left wall (13) and the right wall (14) are provided with hollowed-out holes (17) penetrating through the inner side and the outer side, the hollowed-out holes (17) are densely distributed on the left wall (13) and the right wall (14), and the hollowed-out holes (17) are of irregularly-shaped porous structures.

5. The self-stabilizing interbody fusion cage according to claim 4, wherein a plurality of connecting holes (18) are formed in the left wall (13) and the right wall (14), the connecting holes (18) are communicated with hollowed-out holes (17) in the same direction.

6. The self-stabilizing interbody fusion cage according to claim 4, wherein a support body (4) is provided in the porous structure of the left wall (13) and the right wall (14), and a central hole penetrating the left wall (13) and the right wall (14) is provided at the center of the support body (4).

7. The self-stabilizing interbody fusion cage according to claim 1, wherein the front wall (11), the rear wall (12), the left wall (13) and the right wall (14) are integrally formed, fixing teeth (19) are provided on top and bottom surfaces of the left wall (13) and the right wall (14), and tops of the fixing teeth (19) are provided as tips and inclined toward the rear wall (12).

8. The self-stabilizing interbody fusion cage according to claim 1, wherein the upper and lower surfaces of the left wall (13) and the right wall (14) are each provided with a convex curved surface, and the thicknesses of the left wall (13) and the right wall (14) in the up-down direction are different.

9. The self-stabilizing interbody fusion cage according to claim 1, wherein the lower surfaces of the left wall (13) and the right wall (14) are flat, the upper surfaces are convex curved surfaces, and the thicknesses of the left wall (13) and the right wall (14) in the up-down direction are the same.