CN218899823U - A kind of atlantoaxial intervertebral fusion device - Google Patents

Abstract

The utility model provides an atlantoaxial intervertebral fusion device. The atlantoaxial intervertebral fusion device comprises a fusion device main body and a developing part, the developing part is embedded in the fusion device main body, and the fusion device main body is made of polyether ether ketone resin. The main body of the fusion device is a long streamlined structure. The front end of the main body of the fusion device adopts a "duckbill" structure. The main body of the fusion device also includes a cavity and a fusion hole. The cavity runs through the upper and lower surfaces of the fusion device body, and the fusion hole runs through the fusion The sidewalls on both sides of the device body communicate with the cavity. In the atlantoaxial intervertebral fusion device of the utility model, the main body of the fusion device has a streamlined structure, which is convenient for the surgeon to implant into the human body, avoids damage to the surrounding soft tissue, and shortens the operation time; the granular bone is placed in the cavity, and the granular bone can be combined with the fusion hole through the fusion hole. The surrounding tissues fuse to achieve the effect of intervertebral fusion; the imaging part is embedded in the main body of the fusion cage so that the implantation position of the fusion cage can be more intuitively and clearly observed under X-ray.

Description

A kind of atlantoaxial intervertebral fusion device

technical field

The utility model relates to the technical field of medical instruments, in particular to an atlantoaxial intervertebral fusion device.

Background technique

As an orthopedic implantable medical device, the intervertebral fusion device is one of the main implants for fusion of adjacent intervertebral spaces in the spine. Its safety and effectiveness directly affect the effect of bony fusion of adjacent vertebrae.

Atlantoaxial fusion is a surgical procedure that joins or fuses the atlas and axis vertebrae together. Fusion surgery usually requires bone grafting to facilitate fusion. This procedure involves removing a small amount of bone tissue from the patient's pelvis as an autograft, or obtaining a small amount of bone tissue from a donor as an allograft, and placing the resulting bone tissue between two vertebrae so that they "fuse" together . With the implantation of a biomechanical intervertebral spacer, the bone graft will replace the disc that was completely removed during surgery. Atlantoaxial fusion is a common treatment for spondylosis.

The application of thoracolumbar fusion in atlantoaxial interbody fusion has achieved good clinical results, but the existing thoracolumbar fusion is not designed for atlantoaxial interbody fusion and does not fully match the size of the atlantoaxial facet joints , so it is relatively large in height and size, which may increase the risk of fusion cage implantation. Implanting too high a fusion device between the atlantoaxial vertebrae will accelerate the aging of the surrounding soft tissue and have a certain impact on bone growth. Moreover, the development wire of the existing thoracolumbar fusion device is short and the positioning is not accurate during X-ray examination, and During the implantation, the implantation is not smooth and there is a phenomenon of stuck. Therefore, in order to further improve the curative effect and reduce the operation risk, there is an urgent need for an atlantoaxial intervertebral fusion device.

Utility model content

The utility model overcomes the deficiencies in the prior art and provides an atlantoaxial intervertebral fusion device.

The purpose of this utility model is achieved through the following technical solutions.

An atlantoaxial intervertebral fusion device, comprising a fusion device body and a developing part, the developing part is embedded in the fusion device body, the fusion device body is a long streamlined structure, and the front end of the fusion device body adopts " "Duckbill" structure, the fuser body also includes a cavity and a fusion hole, the cavity runs through the upper surface and the lower surface of the fuser body, and the fusion hole runs through both sides of the fuser body The side wall communicates with the cavity.

As a preferred solution of the above-mentioned atlantoaxial intervertebral fusion device, the corners of the main body of the fusion device are all rounded.

As a preferred solution of the above-mentioned atlantoaxial intervertebral fusion device, there are four developing parts, which are respectively arranged at the four corners of the fusion device body and penetrate through the upper surface and the lower surface of the fusion device body.

As a preferred solution of the above-mentioned atlantoaxial intervertebral fusion device, the upper surface of the fusion device body has an outwardly convex arc-shaped structure.

As a preferred solution of the aforementioned atlantoaxial intervertebral fusion device, serrations are provided on the upper surface of the main body of the fusion device.

As a preferred solution of the above-mentioned atlantoaxial intervertebral fusion device, the lower surface of the fusion device main body is a planar structure.

As a preferred solution of the above-mentioned atlantoaxial intervertebral fusion device, the lower surface of the fusion device main body is provided with serrations.

As a preferred solution of the atlantoaxial intervertebral fusion device, the fusion hole is a long hole structure, and the number of the fusion holes is two.

As a preferred solution of the above-mentioned atlantoaxial intervertebral fusion device, the fusion device main body further includes a threaded hole, and the threaded hole is threadedly connected with the implantation tool.

As a preferred solution of the aforementioned atlantoaxial intervertebral fusion device, the main body of the fusion device is made of polyether ether ketone resin.

The beneficial effects of the utility model are:

The utility model provides an atlantoaxial intervertebral fusion device. The main body of the fusion device has a streamlined structure, and the front end of the fusion device body adopts a "duckbill" structure design, which is convenient for surgeons to implant into the human body, avoids damage to surrounding soft tissues, and shortens the Operation time; the granular bone is placed in the cavity, and the granular bone can be fused with the surrounding tissue through the fusion hole, so as to achieve the effect of intervertebral fusion; the developing part is embedded in the main body of the fusion cage to observe the intervertebral fusion more intuitively and clearly under X-ray implantation location.

Description of drawings

Fig. 1 is the structural representation of the atlantoaxial intervertebral fusion device of the utility model;

Fig. 2 is a side view of the atlantoaxial intervertebral fusion device of the present invention.

In the figure: 1, fusion device main body; 11, front end; 12, rear end; 13, upper surface; 14, lower surface;

2. Developing part; 3. Cavity; 4. Threaded hole; 5. Fusion hole; 6. Inverted tooth; 7. Triangular tooth.

Detailed ways

The technical scheme of the utility model is further described below through specific examples.

As shown in Figure 1-2, this embodiment provides an atlantoaxial intervertebral fusion device, which includes a fusion device main body 1 and a developing part 2, the developing part 2 is embedded in the fusion device main body 1, The fuser main body 1 is made of polyether ether ketone resin. The fuser main body 1 is a long streamlined structure, the front end 11 of the fuser main body 1 adopts a "duckbill" structure, the fuser main body 1 also includes a cavity 3 and a fusion hole 5, and the cavity 3 runs through the upper surface of the fuser main body 1 13 and the lower surface 14 , the fusion hole 5 runs through the sidewalls on both sides of the fuser body 1 and communicates with the cavity 3 .

In this embodiment, the fusion device main body 1 has a streamlined structure, and the front end 11 of the fusion device main body 1 adopts a "duckbill" structure design, which is convenient for the surgeon to implant into the human body, avoids damage to the surrounding soft tissue, and shortens the operation time; the cavity 3 The granular bone is placed in the center, and the granular bone can be fused with the surrounding tissue through the fusion hole 5, so as to achieve the effect of intervertebral fusion; the developing part 2 is embedded in the main body 1 of the fusion cage to observe the intervertebral fusion cage more intuitively and clearly under X-ray Implantation location.

In this embodiment, the corners of the fusion device body 1 are rounded, which makes the outer surface of the fusion device body 1 smoother and more convenient for implantation.

In this embodiment, the developing member 2 is a cylindrical structure and the number is four, which are respectively arranged at the four corners of the fusion device main body 1 and run through the upper surface 13 and the lower surface 14 of the fusion device main body 1. Under X-ray, the developing member 2 2. The overall size and real-time position of the fusion device main body 1 can be marked, which can facilitate doctors to implant the correct position. The developing part 2 can be any kind of biologically good metal frame that can be detected by X-ray inspection. In other embodiments, the number of developing parts 2 can be more, and it is sufficient to clearly display the overall position of the fuser main body 1 .

As shown in FIG. 2 , in this embodiment, the upper surface 13 of the cage main body 1 is a convex arc structure, and the lower surface 14 of the cage main body 1 is a plane structure, which conforms to the physiological curve at the atlantoaxial vertebrae.

The upper surface 13 of the fusion cage main body 1 is provided with sawtooth, and the serrations on the upper surface 13 of the fusion cage main body 1 are inverted teeth 6, and the inverted teeth 6 are firmly buckled with the atlas, so that the atlantoaxial intervertebral fusion cage can be stably fixed on the vertebrae. In the gap, it is not easy to slip out.

The lower surface 14 of the cage main body 1 is provided with serrations, the serrations on the lower surface 14 of the cage main body 1 are triangular teeth 7, and the triangular teeth 7 are firmly embedded with the axial vertebrae, so that the atlantoaxial intervertebral fusion cage can be stably fixed in the intervertebral space Medium, not easy to slide out.

The fusion hole 5 is a long hole structure, and the number of the fusion hole 5 is two, which can provide a large space for the fusion of the granular bone and the surrounding tissue, and can evenly disperse the longitudinal pressure on the main body of the fusion device 1 to the surroundings . As for the shape and quantity of the fusion holes 5, other choices can be made according to specific conditions.

The fusion cage body 1 also includes a threaded hole 4, which is arranged at the rear end 12 of the fusion cage body 1, and the threaded hole 4 is threadedly connected with an implantation tool, so as to realize a stable implantation operation.

The granular bone mentioned in this embodiment can be autologous bone or allogeneic bone.

The implantation operation of the atlantoaxial intervertebral fusion device in this embodiment is as follows: place the pre-prepared granular bone in the cavity 3 of the atlantoaxial intervertebral fusion device, use the implant tool to connect with the threaded hole 4, and insert The atlantoaxial intervertebral fusion cage is inserted into the intervertebral space of the atlantoaxial vertebrae, and the implantation position of the intervertebral fusion cage can be observed more intuitively and clearly under X-ray through the developing part 2 arranged at the angle around the fusion cage main body 1. Due to the structural design of the atlantoaxial intervertebral fusion device in this embodiment, the purpose of restoring the patient's best physiological curve can be achieved after being implanted in the atlantoaxial intervertebral space.

An embodiment of the present utility model has been described in detail above, but the content described is only a preferred embodiment of the present utility model, and cannot be considered as limiting the implementation scope of the present utility model. All equal changes and improvements made according to the application scope of the utility model should still belong to the scope covered by the patent of the utility model.

Claims (10)

1. An atlantoaxial intervertebral fusion device, characterized in that it includes a fusion device main body (1) and a developing part (2), the developing part (2) is embedded in the fusion device main body (1), and the The fuser body (1) is a long streamlined structure, the front end (11) of the fuser body (1) adopts a "duckbill" structure, and the fuser body (1) also includes a cavity (3) and fusion A hole (5), the cavity (3) runs through the upper surface (13) and the lower surface (14) of the fusion device body (1), the fusion hole (5) runs through the fusion device body (1) The sidewalls on both sides are in communication with the cavity (3). 2. The atlantoaxial intervertebral fusion device according to claim 1, characterized in that: the corners of the fusion device body (1) are all rounded. 3. The atlantoaxial intervertebral fusion device according to claim 1, characterized in that there are four developing parts (2), which are respectively arranged at the four corners of the fusion device body (1) and run through all of them. The upper surface (13) and the lower surface (14) of the fuser main body (1). 4. The atlantoaxial intervertebral fusion device according to claim 1, characterized in that: the upper surface (13) of the fusion device body (1) is an outwardly convex arc-shaped structure. 5. The atlantoaxial intervertebral fusion device according to claim 1, characterized in that: the upper surface (13) of the fusion device body (1) is provided with serrations. 6. The atlantoaxial intervertebral fusion device according to claim 1, characterized in that: the lower surface (14) of the fusion device body (1) is a planar structure. 7. The atlantoaxial intervertebral fusion device according to claim 1, characterized in that: the lower surface (14) of the fusion device body (1) is provided with serrations. 8. The atlantoaxial intervertebral fusion device according to claim 1, characterized in that: the fusion hole (5) is a long hole structure, and the number of the fusion hole (5) is two. 9. The atlantoaxial intervertebral fusion device according to claim 1, characterized in that: the fusion device body (1) further includes a threaded hole (4), and the threaded hole (4) is set in the fusion device At the rear end (12) of the main body (1), the threaded hole (4) is threadedly connected with the implantation tool. 10. The atlantoaxial intervertebral fusion device according to claim 1, characterized in that: the fusion device main body (1) is made of polyether ether ketone resin.

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