CN213283599U

CN213283599U - Expandable interbody fusion cage

Info

Publication number: CN213283599U
Application number: CN202021200797.7U
Authority: CN
Inventors: 雷东
Original assignee: Beijing Donghong Zhiyuan Medical Technology Co ltd
Current assignee: Beijing Donghong Zhiyuan Medical Technology Co ltd
Priority date: 2020-06-26
Filing date: 2020-06-26
Publication date: 2021-05-28
Anticipated expiration: 2030-06-26

Abstract

The utility model discloses an expandable intervertebral fusion device, which comprises a frame body, a first supporting plate and a second supporting plate, wherein the first supporting plate is arranged at the top of the frame body, one end of the first supporting plate is fixedly connected with the head end of the frame body, the second supporting plate is arranged at the bottom of the frame body, one end of the frame body is fixedly connected with the head end of the frame body, a guide groove which is arranged along the length direction is arranged on the inner wall of the frame body close to the tail end, the frame body also comprises a push plate, the both ends of push pedal with guide way sliding connection, the top and the bottom of push pedal all articulate there are two piece at least push rods, are located the push pedal top the push rod with the afterbody butt of first backup pad is located the push pedal bottom the push rod with the afterbody butt of second backup pad, the screw rod is installed to the afterbody of framework, the screw rod with the push pedal spiro union. The utility model discloses can effectively improve the stability of being connected between fusion cage and the centrum.

Description

Expandable interbody fusion cage

Technical Field

The utility model relates to an intervertebral fusion cage capable of being opened, which belongs to the field of medical instruments.

Background

With the development of science and technology, more and more people are sedentary, so more and more people suffer from the spinal degenerative disease. The common spinal degenerative diseases include intervertebral disc degeneration, spinal stenosis, spondylolisthesis, and spinal cord or nerve root compression, and these diseases are usually treated by operation, so as to completely relieve the compression, recover the physiological curvature of the spine and ensure the stability of the spine. The existing treatment means usually adopts an expandable intervertebral fusion cage, and the expandable intervertebral fusion cage has better curative effect on the spinal diseases. However, the intervertebral fusion cage in the prior art has a complex structure, and the quantity of bone fragments which can be filled in after the intervertebral fusion cage is propped open is small, so that the fusion effect between the fusion cage and the bone is poor, and some cases even fall off.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a can strut formula interbody fusion cage to solve not enough among the prior art, it can effectively solve prior art's shortcoming, can effectively improve the stability of being connected between fusion cage and the centrum.

The utility model provides an expandable intervertebral fusion cage, which comprises a frame body, a first supporting plate and a second supporting plate, wherein the first supporting plate is arranged at the top of the frame body, one end of the first supporting plate is fixedly connected with the head end of the frame body, the second supporting plate is arranged at the bottom of the frame body, one end of the frame body is fixedly connected with the head end of the frame body, a guide groove which is arranged along the length direction is arranged on the inner wall of the frame body close to the tail end, the frame body also comprises a push plate, the both ends of push pedal with guide way sliding connection, the top and the bottom of push pedal all articulate there are two piece at least push rods, are located the push pedal top the push rod with the afterbody butt of first backup pad is located the push pedal bottom the push rod with the afterbody butt of second backup pad, the screw rod is installed to the afterbody of framework, the screw rod with the push pedal spiro union.

In the aforementioned expandable intervertebral fusion device, preferably, the first support plate and the second support plate are both of a quadrilateral square frame structure, and both surfaces of the first support plate and the second support plate away from the frame body are formed with engaging teeth.

In the aforementioned expandable intervertebral fusion cage, preferably, the thickness of the first support plate gradually decreases from one end close to the head end of the frame body to the other end, and the second support plate and the first support plate are of a symmetrical structure.

In the aforementioned expandable intervertebral fusion cage, preferably, two guide grooves arranged in parallel are disposed on an inner wall of each side of the frame body, and two ends of the push plate are respectively provided with two projections in sliding fit with the guide grooves.

In the aforementioned expandable intervertebral fusion cage, preferably, the central position of the push plate has a threaded hole, the tail of the frame has a unthreaded hole, one end of the screw rod is installed on the unthreaded hole through two limiting plates, and the other end of the screw rod is screwed with the threaded hole.

In the aforementioned expandable intervertebral fusion device, preferably, the first supporting plate and the second supporting plate are all provided with a push rod limiting groove, the bottom of the push rod limiting groove is spherical, and each end of the push rod is spherical.

Compared with the prior art, the utility model discloses a framework, first backup pad, second backup pad and push pedal, the one end of first backup pad and the head end fixed connection of framework, the one end of second backup pad and the head end fixed connection of framework, install in the framework push pedal slidable ground, the top and the bottom of push pedal all articulate there are two piece at least push rods, the push rod respectively with the afterbody butt of the afterbody of first backup pad and second backup pad. Can strut the afterbody of first backup pad and second backup pad through this structure to firmly butt with upper and lower vertebral plate, improve the stability of connecting.

Drawings

Fig. 1 is an isometric view of the present invention;

fig. 2 is an exploded view of the present invention.

Description of reference numerals: 1-frame body, 2-first support plate, 3-second support plate, 4-guide groove, 5-push plate, 6-push rod, 7-screw rod, 8-meshing tooth, 9-lug, 10-threaded hole, 11-unthreaded hole, 12-limit plate, 13-push rod limit groove and 14-tool mounting groove.

Detailed Description

The embodiments described below by referring to the drawings are exemplary only for explaining the present invention, and should not be construed as limiting the present invention.

The embodiment of the utility model provides a: as shown in figures 1 and 2, an expandable intervertebral fusion device comprises a frame body 1, a first support plate 2, a second support plate 3 and a push plate 5, wherein the first support plate 2 is arranged at the top of the frame body 1, one end of the first support plate 2 is fixedly connected with the head end of the frame body 1, the second support plate 3 is arranged at the bottom of the frame body 1, one end of the second support plate 3 is fixedly connected with the head end of the frame body 1, a guide groove 4 arranged along the length direction is arranged on the inner wall close to the tail end in the frame body 1, two ends of the push plate 5 are in sliding connection with the guide groove 4, the height of the push plate 5 is preferably half of the height of the frame body 1, the top and the bottom of the push plate 5 are respectively hinged with at least two push rods 6, specifically, connecting lugs can be arranged at the top and the bottom of the push plate 5, one end of the push rod 6 is rotatably connected with the connecting lugs through a pin shaft, the push, the push rod 6 located at the bottom of the push plate 5 is abutted to the top surface of the tail of the second support plate 3, the screw 7 is installed at the tail of the frame body 1, and the screw 7 is in threaded connection with the push plate 5.

Still be equipped with instrument mounting groove 14 on framework 1's the afterbody both sides wall, will the utility model discloses an instrument mounting groove 14 is installed on mounting tool's tip, then send into the affected part, and use tool's lead screw rotation screw 7, make push pedal 5 remove to the direction that is close to framework 1 afterbody through rotation screw 7, in-process push rod 6 that push pedal 5 removed supports first backup pad 2 and second backup pad 3, it needs to explain, the afterbody laminating of afterbody and framework 1 of first backup pad 2 and second backup pad 3 under natural state, and each push rod 6 all belongs to the tilt state this moment, preferentially in this embodiment, set up two push rods 6 at push pedal 5's top symmetry, set up two push rods 6 in the bottom symmetry. The closer the push plate 5 is to the tail of the frame 1, the greater the distance that the first support plate 2 and the second support plate 3 are stretched until the plates are completely and firmly abutted. The utility model discloses simple structure, inner space is big moreover, can fill more broken bones, thereby help the utility model discloses fuse together with the bone.

In a specific embodiment, the first support plate 2 and the second support plate 3 are both of a quadrangular square frame structure, and the engaging teeth 8 are formed on both the top surface of the first support plate 2 and the bottom surface of the second support plate 3. In order to improve the firmness, the inclination directions of the two adjacent rows of meshing teeth 8 are opposite. The thickness of first backup pad 2 diminishes from the one end that is close to framework 1 head end to the other end gradually, and second backup pad 3 and first backup pad 2 are the symmetrical formula structure. The purpose of design like this is, first backup pad 2 and second backup pad 3 are because one end is fixed with framework 1, during the support, only the distance of the other end enlarges, if design for the uniform thickness structure, then prop open the whole thickness of back tail end big, the whole thickness of head end is little, though also can the unstable support, but the supporting effect does not have the structural benefit of this embodiment, adopt this embodiment structure can make the tail end prop open the back both ends and keep the same thickness to reach better supporting effect.

Furthermore, the inner wall of each side of the frame body 1 is provided with two guide grooves 4 which are arranged in parallel, and two ends of the push plate 5 are respectively provided with two convex blocks 9 which are in sliding fit with the guide grooves 4. Therefore, the push plate 5 can be kept balanced during movement, and the push plate 5 is prevented from being inclined.

The central position of push pedal 5 has screw hole 10, and the afterbody of framework 1 has unthreaded hole 11, and the one end of screw rod 7 is installed on unthreaded hole 11 through two limiting plates 12, and the other end and screw hole 10 spiro union. The arrangement of the limiting plate 12 can enable the screw 7 to only produce circumferential rotation, and axial displacement can not be produced, so that the push plate 5 can be driven to move. The end of the screw 7 is formed with a hexagonal socket.

All be equipped with push rod spacing groove 13 on first backup pad 2 and the second backup pad 3, the bottom of push rod spacing groove 13 is the ball form, and the tip of every push rod 6 is ball form structure, and this structure makes things convenient for the bracing piece 6 to rotate.

The structure, features and effects of the present invention have been described in detail above according to the embodiment shown in the drawings, and the above description is only the preferred embodiment of the present invention, but the present invention is not limited to the implementation scope shown in the drawings, and all changes made according to the idea of the present invention or equivalent embodiments modified to the same changes should be considered within the protection scope of the present invention when not exceeding the spirit covered by the description and drawings.

Claims

1. The utility model provides a can strut formula interbody fusion cage, includes framework (1), first backup pad (2) and second backup pad (3), first backup pad (2) set up the top of framework (1), its one end with the head end fixed connection of framework (1), second backup pad (3) set up the bottom of framework (1), its one end with the head end fixed connection of framework (1), its characterized in that: be provided with guide way (4) of arranging along length direction on the inner wall that is close to the tail end in framework (1), still include push pedal (5), the both ends of push pedal (5) with guide way (4) sliding connection, the top and the bottom of push pedal (5) all articulate there are two piece at least push rod (6), are located push pedal (5) top push rod (6) with the afterbody butt of first backup pad (2), be located push pedal (5) bottom push rod (6) with the afterbody butt of second backup pad (3), screw rod (7) are installed to the afterbody of framework (1), screw rod (7) with push pedal (5) spiro union.

2. The distractible intersomatic cage of claim 1, wherein: the first supporting plate (2) and the second supporting plate (3) are both of quadrilateral square frame structures, and meshing teeth (8) are formed on the surfaces, far away from the frame body (1), of the first supporting plate and the second supporting plate.

3. The distractible intersomatic cage of claim 2, wherein: the thickness of first backup pad (2) diminishes from being close to one end to the other end of framework (1) head end gradually, second backup pad (3) with first backup pad (2) are the symmetrical formula structure.

4. The distractible intersomatic cage of claim 1, wherein: the inner wall of each side of the frame body (1) is provided with two guide grooves (4) which are arranged in parallel, and two ends of the push plate (5) are respectively provided with two lugs (9) which are in sliding fit with the guide grooves (4).

5. The distractible intersomatic cage of claim 1 or 4, wherein: the central point of push pedal (5) puts screw hole (10) has, the afterbody of framework (1) has unthreaded hole (11), the one end of screw rod (7) is installed through two limiting plates (12) on unthreaded hole (11), the other end with screw hole (10) spiro union.

6. The distractible intersomatic cage of claim 1, wherein: the first supporting plate (2) and the second supporting plate (3) are provided with push rod limiting grooves (13), the bottoms of the push rod limiting grooves (13) are spherical, and the ends of the push rods (6) are spherical structures.