阅读说明：本技术 颈椎前路邻椎退变预防缓冲装置 (Anterior cervical adjacent vertebra degeneration prevention buffer device ) 是由 郭英俊 洪瑛 刘浩 于 2020-05-28 设计创作，主要内容包括：本发明公开一种颈椎前路邻椎退变预防缓冲装置,包括主钢板、副钢板和缓冲板,所述主钢板整体呈矩形,所述副钢板整体呈矩形,所述缓冲板整体呈矩形；主钢板2条短边侧面均设有主钢板卡槽,所述副钢板其中一边侧面设有副钢板卡槽,所述主钢板卡槽、副钢板卡槽均与缓冲板短边端相适配；所述主钢板、副钢板表面均设有长螺钉螺孔,所述主钢板、副钢板、缓冲板表面均设有短螺钉螺孔；副钢板表面上的短螺钉螺孔与缓冲板表面上的其中1组短螺钉螺孔位置正对,主钢板表面上的其中1组短螺钉螺孔与缓冲板表面上的其中1组短螺钉螺孔位置正对。本发明结构简单,可在不需要更换钢板及反复拧动螺钉的情况下预防邻椎病的发生。(The invention discloses a cervical vertebra anterior adjacent vertebra degeneration prevention buffer device which comprises a main steel plate, an auxiliary steel plate and a buffer plate, wherein the main steel plate is rectangular as a whole, the auxiliary steel plate is rectangular as a whole, and the buffer plate is rectangular as a whole; the side surfaces of 2 short sides of the main steel plates are provided with main steel plate clamping grooves, one side surface of each auxiliary steel plate is provided with an auxiliary steel plate clamping groove, and the main steel plate clamping grooves and the auxiliary steel plate clamping grooves are matched with the short side ends of the buffer plate; the surfaces of the main steel plate and the auxiliary steel plate are provided with long screw holes, and the surfaces of the main steel plate, the auxiliary steel plate and the buffer plate are provided with short screw holes; the short screw holes on the surface of the auxiliary steel plate are opposite to the positions of 1 group of short screw holes on the surface of the buffer plate, and the positions of 1 group of short screw holes on the surface of the main steel plate are opposite to the positions of 1 group of short screw holes on the surface of the buffer plate. The invention has simple structure and can prevent the occurrence of the adjacent vertebra disease under the condition of not needing to replace a steel plate and repeatedly screwing the screw.)

1. Anterior cervical adjacent vertebrae regression prevention buffer device, its characterized in that: the steel plate comprises a main steel plate, an auxiliary steel plate and a buffer plate, wherein the main steel plate is rectangular as a whole, the auxiliary steel plate is rectangular as a whole, and the buffer plate is rectangular as a whole;

the side surfaces of 2 short sides of the main steel plates are provided with main steel plate clamping grooves, one side surface of each auxiliary steel plate is provided with an auxiliary steel plate clamping groove, and the main steel plate clamping grooves and the auxiliary steel plate clamping grooves are matched with the short side ends of the buffer plate;

the surfaces of the main steel plate and the auxiliary steel plate are respectively provided with long screw holes, the number of the long screw holes arranged on the surface of the main steel plate is 4, the long screw holes are respectively positioned at 4 included angles of the main steel plate, and the number of the long screw holes on the surface of the auxiliary steel plate is 2, close to one end far away from the clamping groove of the auxiliary steel plate;

the surfaces of the main steel plate, the auxiliary steel plate and the buffer plate are all provided with short screw holes, 4 short screw holes are formed in the surface of the main steel plate, 2 short screw holes are formed in the surface of the main steel plate and are mutually symmetrical, the short screw holes in the surfaces of the 2 groups of main steel plates are respectively close to 2 short sides of the main steel plate, 2 short screw holes are formed in the surface of the auxiliary steel plate and are mutually symmetrical along a central line, and the short screw holes in the surface of the auxiliary steel plate are close to one side where the auxiliary steel plate;

the number of the short screw holes arranged on the surface of the buffer plate is 4, 2 short screw holes are mutually symmetrical, the short screw holes on the surfaces of the 2 groups of buffer plates are respectively close to the short edges of the buffer plate, the short screw holes on the surface of the auxiliary steel plate are opposite to the positions of 1 group of short screw holes on the surface of the buffer plate, and the positions of 1 group of short screw holes on the surface of the main steel plate are opposite to the positions of 1 group of short screw holes on the surface of the buffer plate.

2. The anterior cervical adjacent vertebra degeneration prevention buffer device according to claim 1, wherein: the 4 sides of the main steel plate are all set as arc-shaped sides which are bent inwards.

3. The anterior cervical adjacent vertebra degeneration prevention buffer device according to claim 1, wherein: long and short screws are also included.

4. The anterior cervical adjacent vertebra degeneration prevention buffer device according to claim 3, wherein: the long screw is matched with the screw hole of the long screw, and the short screw is matched with the screw hole of the short screw.

5. The anterior cervical adjacent vertebra degeneration prevention buffer device according to claim 1, wherein: the buffer plate is a hard polymer plastic plate or a steel plate.

6. The anterior cervical adjacent vertebra degeneration prevention buffer device according to claim 1, wherein: the main steel plate, the auxiliary steel plate and the buffer plate are arc-shaped.

7. The anterior cervical adjacent vertebra degeneration prevention buffer device according to claim 1, wherein: the distance between the long screw hole on the surface of the main steel plate and the short edge of the main steel plate is larger than the distance between the short screw hole on the surface of the main steel plate and the short edge of the main steel plate.

Technical Field

The invention relates to the technical field of medical instruments, in particular to a cervical anterior adjacent vertebra degeneration prevention buffer device.

Background

The clinical purpose of relieving the decompression of spinal cords or nerve roots is achieved by removing diseased intervertebral discs and removing substances causing the decompression in vertebral canals, thereby relieving the clinical symptoms of patients. The operation has a history of more than 50 years, is the most common operation mode for treating the cervical intervertebral disc degeneration disease at present, and is also the gold standard for treating the cervical spondylosis.

There are two main categories of endoprostheses in common use today: firstly, Cage + Plate, namely an intervertebral fusion Cage and an anterior steel Plate are put between two vertebral bodies, and the fusion Cage and the artificial bone (or autologous bone) are put between the two vertebral bodies to play roles in supporting and promoting fusion; the steel plate is additionally arranged in front of the implant, so that the implant is prevented from falling off forwards and the stability is strengthened. Secondly, Zero Profile, that is, a commonly-known Zero-notch interbody fusion cage, such as Zero-P, omits a front steel plate, and is fixed between an upper vertebral body and a lower vertebral body through a self screw system, so that complications caused by the front steel plate, such as dysphagia and the like, are reduced.

Indeed, ACDF surgery achieves excellent therapeutic results, but is accompanied by a reduction in the mobility of the cervical vertebrae resulting from the intervertebral fusion, which in turn leads to a compensatory increase in the mobility of the adjacent segments of the operative segment, which results in an accelerated degeneration of their adjacent segments, known as adjacent vertebral disease (ASD). Aiming at the complication, clinicians creatively invent an artificial cervical intervertebral disc and successfully apply the artificial cervical intervertebral disc to clinic, namely, the artificial cervical intervertebral disc replacement (ACDR). However, because the current adaptation range of the artificial cervical intervertebral disc is still narrow, ACDF is selected for most patients.

Therefore, how to prevent the occurrence of the adjacent vertebra disease remains an important clinical problem to be faced by the present spinal surgeons, especially for the case that the adjacent intervertebral discs have already developed a certain degree of degeneration and the situation that has no clinical symptoms, i.e. no need of operation, is difficult to decide.

Disclosure of Invention

The invention aims to provide a cervical vertebra anterior adjacent vertebra degeneration prevention buffer device which is simple in structure and can replace a steel plate under the condition that an original steel plate is not detached.

In order to achieve the purpose, the invention is realized by adopting the following technical scheme:

the anterior cervical adjacent vertebra degeneration prevention buffer device comprises a main steel plate, an auxiliary steel plate and a buffer plate, wherein the main steel plate is rectangular as a whole, the auxiliary steel plate is rectangular as a whole, and the buffer plate is rectangular as a whole;

the side surfaces of 2 short sides of the main steel plates are provided with main steel plate clamping grooves, one side surface of each auxiliary steel plate is provided with an auxiliary steel plate clamping groove, and the main steel plate clamping grooves and the auxiliary steel plate clamping grooves are matched with the short side ends of the buffer plate;

the surfaces of the main steel plate and the auxiliary steel plate are respectively provided with long screw holes, the number of the long screw holes arranged on the surface of the main steel plate is 4, the long screw holes are respectively positioned at 4 included angles of the main steel plate, and the number of the long screw holes on the surface of the auxiliary steel plate is 2, close to one end far away from the clamping groove of the auxiliary steel plate;

the surfaces of the main steel plate, the auxiliary steel plate and the buffer plate are all provided with short screw holes, 4 short screw holes are formed in the surface of the main steel plate, 2 short screw holes are formed in the surface of the main steel plate and are mutually symmetrical, the short screw holes in the surfaces of the 2 groups of main steel plates are respectively close to 2 short sides of the main steel plate, 2 short screw holes are formed in the surface of the auxiliary steel plate and are mutually symmetrical along a central line, and the short screw holes in the surface of the auxiliary steel plate are close to one side where the auxiliary steel plate;

the number of the short screw holes arranged on the surface of the buffer plate is 4, 2 short screw holes are mutually symmetrical, the short screw holes on the surfaces of the 2 groups of buffer plates are respectively close to the short edges of the buffer plate, the short screw holes on the surface of the auxiliary steel plate are opposite to the positions of 1 group of short screw holes on the surface of the buffer plate, and the positions of 1 group of short screw holes on the surface of the main steel plate are opposite to the positions of 1 group of short screw holes on the surface of the buffer plate.

Preferably, the 4 sides of the main steel plate are all provided with arc-shaped sides which are bent inwards.

Preferably, long screws and short screws are also included.

Furthermore, the long screw is matched with the screw hole of the long screw, and the short screw is matched with the screw hole of the short screw.

Preferably, the buffer plate is a hard polymer plastic plate or a steel plate.

Preferably, the main steel plate, the auxiliary steel plate and the buffer plate are arc-shaped.

Preferably, the distance from the long screw hole on the surface of the main steel plate to the short side of the main steel plate is greater than the distance from the short screw hole on the surface of the main steel plate to the short side of the main steel plate.

The invention has the following advantages:

1. according to the invention, the upper-level or lower-level adjacent segments are protected through the integral structure, so that accelerated degeneration caused by compensatory overactivity is effectively prevented, namely, the adjacent vertebra disease is prevented;

2. under the condition that secondary operation is needed, due to the buffer plate and the characteristic of easy disassembly of the buffer plate, the replacement steel plate with the same structure is replaced after decompression is finished, and dangerous complications such as nail path expansion, implant loosening and the like caused by repeated screwing of screws are avoided.

Drawings

FIG. 1 is a front view of the present invention in an unused state;

FIG. 2 is a lower side view of the invention in an unused state;

FIG. 3 is a front view of the baffle in an unused state;

FIG. 4 is a side view of the baffle in an unused condition;

fig. 5 is a diagram illustrating the effect of the present invention.

In the figure: 1-main steel plate, 2-auxiliary steel plate, 3-buffer plate, 4-main steel plate clamping groove, 5-auxiliary steel plate clamping groove, 6-long screw hole, 7-short screw hole and 8-centrum.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings.

As shown in fig. 1, 2, 3 and 4, anterior cervical vertebra adjacent vertebra degeneration prevention buffer device includes main steel sheet 1, vice steel sheet 2 and buffer board 3, main steel sheet 1 is whole to be the rectangle, vice steel sheet 2 is whole to be the rectangle, buffer board 3 is whole to be the rectangle, main steel sheet 1, vice steel sheet 2 and buffer board 3 face are the arcuation.

4 edges of the main steel plate 1 are respectively provided with an arc-shaped side edge which is bent inwards, 2 short side surfaces of the main steel plate 1 are respectively provided with a main steel plate clamping groove 4, one side surface of the auxiliary steel plate 2 is provided with an auxiliary steel plate clamping groove 5, and the main steel plate clamping groove 4 and the auxiliary steel plate clamping groove 5 are respectively matched with the short side end of the buffer plate 3;

main steel sheet 1, vice steel sheet 2 surfaces all are equipped with long screw 6, and main steel sheet surface is established long screw 6 and is had 4 and be located 4 contained angle positions of main steel sheet 1 respectively, vice steel sheet 2 surfaces long screw 6 is close to the one end of keeping away from vice steel sheet draw-in groove 5 and has 2.

The surfaces of the main steel plate 1, the auxiliary steel plate 2 and the buffer plate 3 are respectively provided with short screw holes 7, 4 short screw holes 7 are arranged on the surface of the main steel plate 1, 2 short screw holes are mutually symmetrical in a group, the short screw holes 7 on the surface of the 2 groups of main steel plates 1 are respectively close to 2 short sides of the main steel plate 1, 2 short screw holes 7 on the surface of the auxiliary steel plate 2 are mutually symmetrical along a central line, and the short screw holes 7 on the surface of the auxiliary steel plate 2 are close to one side where the auxiliary steel plate clamping grooves 5 are located; the distance from the long screw hole 6 on the surface of the main steel plate 1 to the short side of the main steel plate 1 is larger than the distance from the short screw hole 7 on the surface of the main steel plate 1 to the short side of the main steel plate 1.

The invention also comprises a long screw and a short screw, wherein the long screw is matched with the long screw hole 6, and the short screw is matched with the short screw hole 7.

4 short screw holes 7 are arranged on the surface of the buffer plate 3, 2 short screw holes are mutually symmetrical, the short screw holes 7 on the surface of the buffer plate 3 are respectively close to the short sides of the buffer plate 3, the short screw holes 7 on the surface of the auxiliary steel plate 2 are opposite to the positions of 1 group of short screw holes 7 on the surface of the buffer plate 3, and the 1 group of short screw holes 7 on the surface of the main steel plate 1 are opposite to the positions of 1 group of short screw holes 7 on the surface of the buffer plate 3.

The buffer plate 3 is a hard polymer plastic plate or a steel plate, the elastic modulus of the buffer plate is higher than that of the steel plate, after the device is placed, the buffer plate 3 is positioned in front of the adjacent intervertebral disc, compensatory excessive movement of the adjacent section caused by fusion surgery can be reduced, and the section cannot lose mobility. Under the conventional condition, the buffer plate 3 is embedded and fixed between the main steel plate clamping groove 4 and the auxiliary steel plate clamping groove 5, and further short screw reinforcement is carried out through 4 short screw holes 7

When the adjacent segments need to undergo fusion surgery, the existing buffer plate 3 may be replaced with a replacement steel plate having the same structure as the buffer plate 3, the replacement steel plate being made of titanium alloy.

As shown in fig. 5, after the conventional ACDF operation, since the operative segment has lost its mobility due to fusion, the adjacent segment above the operative segment may have compensatory overactivity, i.e. mobility exceeding the normal physiological level, and such overactivity may cause accelerated degeneration thereof, especially in the case of a certain degree of degeneration, it is often performed again due to degeneration of the adjacent vertebrae shortly after the first operation. During the operation of the second time, often need demolish original steel sheet, install longer steel sheet, so, repeated wrong income screw can lead to the nail to say not hard up, and centrum 8 destroys, and then the not hard up condition of steel sheet appears more easily.

The buffer plate 3 has toughness, so that the mobility of an upper adjacent vertebra is reduced, and the upper adjacent vertebra is protected.

If the upper adjacent vertebra is unfortunately degenerated and needs to be fused, after the operative field is exposed, the buffer plate 3 can be directly removed, the pressure of the section is reduced, and the main steel plate 1 and the auxiliary steel plate 2 do not need to be removed. After decompression is completed and the interbody fusion cage is inserted, the replacement steel plate is installed in the original position of the buffer plate and fixed.

The present invention is capable of other embodiments, and various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention.