Interbody fusion cage with self-stabilization function

Abstract

The interbody fusion cage with the self-stabilization function comprises a fusion cage body, tooth grooves are formed in the upper side and the lower side of the fusion cage body, and a fastening structure is arranged in the fusion cage body. A mounting cavity is formed in the fusion cage body, the fastening structure comprises at least two guide rods vertically arranged in the mounting cavity, and two top plates are slidably connected to the outer sides of the guide rods. According to the interbody fusion cage with the self-stabilizing function, by rotating a bolt, one end of the bolt extends to the position between the two arc-shaped plates, the two top plates are pushed to move back to back, protrusions on the two top plates extend to the upper side and the lower side of the fusion cage body respectively and make contact with two adjacent vertebrae, and therefore the fusion cage body is fixed; the fusion cage is effectively fixed between adjacent vertebrae, a traditional screw fixing mode is changed, additional repair operations are avoided, and pain of a patient and treatment cost are reduced.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to an interbody fusion device with self-stabilizing function. Background Technology

[0002] Spinal fusion is a fundamental technique for treating spinal diseases, used to establish and maintain spinal stability. Interbody fusion is the ideal procedure in spinal fusion that conforms to spinal biomechanics, and fusion devices are commonly used instruments in interbody fusion.

[0003] When a conventional fusion cage is implanted alone, the immediate stability of the surgical segment is poor. It usually needs to be used in conjunction with internal fixation systems such as pedicle screws or rods to ensure that the surgical segment receives adequate immediate stability support after surgery. Moreover, fusion surgery usually requires a large surgical incision, which increases surgical trauma to the patient and leads to a prolonged recovery time. At the same time, the cost of implanting the fusion cage and internal fixation system is high, which significantly increases postoperative treatment costs. In addition, although the fusion cage and internal fixation system are designed to provide stability, there is still a risk of postoperative fusion cage displacement or extrusion from the intervertebral space. This may lead to surgical failure or the need for additional repair surgery, increasing patient suffering and treatment costs. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides an interbody fusion device with self-stabilizing function, which solves the problem of increased surgical trauma to patients and prolonged postoperative recovery time.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an intervertebral fusion device with self-stabilizing function, comprising a fusion device body, with toothed grooves on both the upper and lower sides of the fusion device body, and a fastening structure inside the fusion device body;

[0006] The fusion device body has an internal mounting cavity. The fastening structure includes at least two guide rods vertically disposed inside the mounting cavity. Two top plates are slidably connected to the outer side of the guide rods. Several protrusions are provided on the opposite side of the two top plates. The side of the protrusions away from the top plates penetrates and extends to the outer side of the fusion device body.

[0007] Both top plates have an arc-shaped plate on their right side, and the two arc-shaped plates are arranged in a figure-eight pattern. An installation plate is installed inside the installation cavity, and bolts are threaded into the installation plate.

[0008] Furthermore, a protrusion is provided on the side of the bolt near the arc-shaped plate, and the protrusion is shaped like a platform.

[0009] Furthermore, springs are installed on opposite sides of the two top plates, and the two springs are respectively connected to the top and bottom of the inner wall of the mounting cavity.

[0010] Furthermore, the spring is sleeved on the outside of the guide rod.

[0011] Furthermore, several of the protrusions are equidistantly distributed along the transverse direction.

[0012] Furthermore, several of the protrusions are located on the transverse central axis of the fusion body.

[0013] Furthermore, corresponding to the two arc-shaped plates, arc-shaped grooves for embedding the arc-shaped plates are provided on both the upper and lower sides of the inner wall of the mounting cavity.

[0014] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0015] 1. This self-stabilizing intervertebral fusion cage, by rotating the bolt, allows one end of the bolt to extend between two arc-shaped plates, pushing the two top plates to move backwards. This causes the protrusions on the two top plates to extend to the upper and lower sides of the fusion cage body and contact the two adjacent vertebrae, thereby fixing the fusion cage body. The fusion cage is effectively fixed between adjacent vertebrae, changing the traditional screw fixation method, avoiding additional repair surgery, and reducing patient pain and treatment costs.

[0016] 2. In actual installation, the protrusions of this self-stabilizing interbody fusion device are evenly distributed in the transverse direction and located on the transverse central axis of the device body. This ensures that the protrusions are evenly distributed in the core position of the device body during installation, thereby enhancing the stability during fixation. In addition, the even distribution can effectively disperse pressure and force, reduce the risk of local stress concentration, and ensure that the bones and soft tissues around the vertebrae or implant are not affected by excessive stress. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0019] Figure 3 This is a front view structural diagram of the present invention.

[0020] In the diagram: 1. Fusion unit body; 2. Gear groove; 3. Fastening structure; 301. Guide rod; 302. Top plate; 303. Protrusion; 304. Arc plate; 305. Mounting plate; 306. Bolt; 307. Spring. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-3 In this embodiment, a self-stabilizing intervertebral fusion device is used to fix the fusion device between adjacent vertebrae, changing the traditional screw fixation method.

[0023] Specifically, it includes the fusion body 1, with toothed grooves 2 on both the upper and lower sides of the fusion body 1, and a fastening structure 3 inside the fusion body 1.

[0024] In actual use, the fusion device body 1 is installed between two adjacent vertebrae. The fusion device body 1 is fixed between the two vertebrae by the cooperation between the various components inside the fastening structure 3, thus achieving the fixation of the fusion device body 1.

[0025] In detail, the fusion device body 1 has an installation cavity inside. The fastening structure 3 includes at least two guide rods 301 vertically disposed inside the installation cavity. Two top plates 302 are slidably connected to the outer side of the guide rods 301. Several protrusions 303 are provided on the opposite side of the two top plates 302. The side of the protrusions 303 away from the top plates 302 penetrates and extends to the outer side of the fusion device body 1. Arc-shaped plates 304 are provided on the right side of the two top plates 302. The two arc-shaped plates 304 are distributed in a figure-eight pattern. An installation plate 305 is provided inside the installation cavity. Bolts 306 are threadedly connected to the inside of the installation plate 305.

[0026] In actual use, by rotating the bolt 306, one end of the bolt 306 extends between the two arc-shaped plates 304, and pushes the two top plates 302 to move in opposite directions, so that the protrusions 303 on the two top plates 302 extend to the upper and lower sides of the fusion device body 1 respectively, and contact the two adjacent vertebrae, thereby fixing the fusion device body 1.

[0027] In actual setup, two arc-shaped plates 304 are set up and distributed in a figure-eight shape, so that one end of the bolt 306 can extend between the two top plates 302, thereby pushing the two top plates 302 to move in opposite directions, so that the protrusion 303 on the top plate 302 can effectively extend out from the inside of the fusion body 1.

[0028] Furthermore, in order to facilitate the extension of the bolt 306 between the two top plates 302, a protrusion is provided on the side of the bolt 306 near the arc plate 304 in this embodiment, and the protrusion is in the shape of a platform.

[0029] Preferably, in order to facilitate the disassembly of the fusion device body 1, springs 307 are installed on the opposite sides of the two top plates 302 in this embodiment. The two springs 307 are respectively connected to the top and bottom of the inner wall of the mounting cavity, and the springs 307 are sleeved on the outside of the guide rod 301.

[0030] In actual use, when the bolt 306 extends between the two top plates 302, it can push the two top plates 302 to move in opposite directions, and at the same time compress the springs 307 on the upper and lower sides, so that both springs 307 have a certain elastic potential energy. That is, when the bolt 306 moves out from between the two top plates 302, the springs 307 on the upper and lower sides will automatically rebound when they are not constrained, so that the two top plates 302 move in opposite directions. At this time, the protrusion 303 connected to the top plate 302 will automatically move into the interior of the fusion device body 1, and then the fusion device body 1 can be removed from between the two adjacent vertebrae.

[0031] It should be noted that, in order to ensure stability during fixation, several protrusions 303 in this embodiment are distributed at equal intervals along the lateral direction, and all of the several protrusions 303 are located on the lateral central axis of the fusion body 1.

[0032] In actual installation, the protrusions 303 are evenly distributed in the transverse direction and located on the transverse central axis of the fusion body 1. This ensures that the protrusions 303 can be evenly distributed in the core position of the fusion body 1 during installation, thereby enhancing the stability during fixation. In addition, the equidistant distribution can effectively disperse pressure and force, reduce the risk of local stress concentration, and ensure that the bones and soft tissues around the vertebrae or implant are not affected by excessive stress.

[0033] In addition, to ensure the maximum range of movement of the two top plates 302, arc-shaped grooves for the arc-shaped plates 304 to be embedded are provided on the upper and lower sides of the inner wall of the mounting cavity, corresponding to the two arc-shaped plates 304.

[0034] In actual use, when the two top plates 302 move in opposite directions, the arc plate 304 connected to them will extend into the interior of the arc groove, so that the two top plates 302 can fit against the upper and lower sides of the inner wall of the mounting cavity respectively.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A self-stabilizing interbody fusion device, characterized in that: Includes a fusion body (1), with toothed grooves (2) on both the upper and lower sides of the fusion body (1), and a fastening structure (3) inside the fusion body (1); The fusion body (1) has an installation cavity inside. The fastening structure (3) includes at least two guide rods (301) vertically disposed inside the installation cavity. Two top plates (302) are slidably connected to the outside of the guide rods (301). Several protrusions (303) are provided on the opposite side of the two top plates (302). The side of the protrusions (303) away from the top plates (302) penetrates and extends to the outside of the fusion body (1). An arc-shaped plate (304) is provided on the right side of both top plates (302), and the two arc-shaped plates (304) are arranged in a figure-eight pattern. An installation plate (305) is provided inside the installation cavity, and a bolt (306) is threadedly connected inside the installation plate (305).

2. The interbody fusion device with self-stabilizing function according to claim 1, characterized in that: The bolt (306) has a protrusion on the side near the arc plate (304), and the protrusion is shaped like a platform.

3. The interbody fusion device with self-stabilizing function according to claim 1, characterized in that: Springs (307) are installed on opposite sides of the two top plates (302), and the two springs (307) are respectively connected to the top and bottom of the inner wall of the mounting cavity.

4. The interbody fusion device with self-stabilizing function according to claim 3, characterized in that: The spring (307) is sleeved on the outside of the guide rod (301).

5. The interbody fusion device with self-stabilizing function according to claim 1, characterized in that: Several of the protrusions (303) are equidistantly distributed in the transverse direction.

6. The interbody fusion device with self-stabilizing function according to claim 1, characterized in that: Several of the protrusions (303) are located on the transverse central axis of the fusion body (1).

7. The interbody fusion device with self-stabilizing function according to claim 1, characterized in that: Corresponding to the two arc-shaped plates (304), arc-shaped grooves for embedding the arc-shaped plates (304) are provided on both the upper and lower sides of the inner wall of the mounting cavity.

Images