CN111358600A - Self-locking intervertebral fusion device system under spinal endoscope - Google Patents

Abstract

The present invention provides a spinal endoscopic self-locking interbody cage system, comprising a cage body, a self-locking lag screw, a cage holder and a screw handle, wherein the self-locking lag screw is connected to the cage body, The cage holder is used to connect and operate and install the cage body, and the screw handle connects and operates to install the self-locking lag screw. The self-locking interbody cage system is suitable for spinal endoscopic lumbar fusion. The invention is used to solve the problems of low fusion rate of the intervertebral cage and further reduce trauma in the process of endoscopic-assisted lower lumbar fusion, avoid insufficient autologous bone during the operation, and can effectively improve the efficiency of percutaneous endoscopic-assisted endoscopic fusion , greatly improving the safety of surgery.

Description

Spinal endoscopic self-locking interbody cage system

technical field

The invention belongs to the field of spinal minimally invasive fusion, and relates to percutaneous spinal endoscopic-assisted lumbar fusion technology, in particular to how to insert an intervertebral fusion device into the intervertebral space during a minimally invasive fusion operation, and the implanted intervertebral fusion How to achieve instant stabilization with the vertebral body by means of self-locking lag screws, and provide a self-locking interbody cage system under spinal endoscopic.

Background technique

Endoscopic lumabr interbody fusion (Endo-LIF) is one of the minimally invasive fusion techniques for the precise treatment of lumbar degenerative diseases at present. Consistent clinical efficacy, less incision and tissue damage, no postoperative drainage, faster recovery, local anesthesia can be completed, and more importantly, the intervertebral space can be treated under direct vision during the operation, reducing cartilage endplate damage and avoiding vertebral Early collapse of the gap. However, the current problems are that the operation efficiency is still low, the fusion speed of the interbody cage is slow, and the need to cooperate with percutaneous pedicle screw fixation, etc., limit the development of this technology. The focus of clinical and scientific research is to realize the rapid fixation of the intervertebral space on the basis of the current interbody cage and reduce the fixation of the posterior percutaneous screw, which will greatly improve the safety and efficiency of the operation.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a self-locking intervertebral cage system under spinal endoscopic, which is used to solve the problem of how to insert the intervertebral cage to achieve rapid stability after spinal endoscopic decompression, and the present invention can be applied to minimally invasive surgery. field, while open surgery can be used.

In order to solve the above-mentioned technical problems, the present invention adopts the following technical solutions to be realized:

A self-locking interbody cage system under spinal endoscopy, comprising a cage body, a self-locking lag screw, a cage holder and a screw handle, the self-locking lag screw is connected to the cage body, and the fusion The device holder is used for connecting and operating and installing the cage body, and the screw handle is connected and operating and installing the self-locking lag screw. The self-locking interbody cage system is suitable for spinal endoscopic lumbar fusion. The self-locking intervertebral cage system of the present invention has strong supporting strength, self-locking pulling force design, and faster bone fusion efficiency.

Further, the outlines of the top and bottom surfaces of the fusion device body are convex arcs, the front end is in the shape of a bullet head, the rear end is a blunt shape, a rectangular through hole is arranged in the center, and a groove is arranged outside the rear end for connecting. The cage holder is provided with two threaded nail holes inside the rear end for matching the self-locking lag screw; the top surface is a barb-shaped porous structure, and the sides are also provided with a plurality of side holes.

Wherein, the length of the cage body is 23 or 25 cm, the height is 8, 10, 12 or 14 mm, and the width is 10 mm.

Still further, the two nail holes are arranged obliquely, and the inclination directions are different. One leans inward, the other leans outward.

Further, the distal end of the self-locking lag screw is of a self-tapping hollow design, the thread spacing is tight, and gradually widens toward the proximal end, and the proximal end is of a self-locking design, matching the screw hole at the tail end of the cage body.

Wherein, the diameter of the self-locking lag screw is 4.5, 5.5 or 6.5 mm, and the length is 16 mm.

Further, the cage holder is made of stainless steel, the front end is connected with the groove of the tail end of the cage body, and the end is a spiral design. The tail ends are separated when the hour hand is turned.

The cage holder is 330mm in length and 8mm in diameter.

Further, the screw handle is in the shape of a hollow cylinder, and after the self-locking lag screw is sent into the screw hole along the guide wire, it can achieve strong internal fixation with the vertebral body.

Wherein, the diameter of the connection between the screw handle and the self-locking lag screw is 4.0 mm, and the diameter of the main body part is 4.5 mm, which can realize screw implantation under the endoscope.

Compared with the prior art, the advantages and positive effects of the present invention are:

The invention is an intervertebral fusion cage suitable for use under spinal endoscopic, which can reduce medical costs while ensuring the safety of patients; the uniquely designed cage and self-locking lag screw assembly can realize the reduction of reduction in a single surgical incision. Compression, fusion and internal fixation greatly improve the operation efficiency; the self-locking intervertebral cage system assisted by the spinal endoscope of the present invention can replace the cage currently used clinically, and has a broad clinical application prospect.

The research and development of the self-locking interbody cage system of the present invention will become a development direction of the spinal endoscopic-assisted fusion in the future.

Other features and advantages of the present invention will become more apparent upon reading the detailed description of the embodiments of the present invention in conjunction with the accompanying drawings.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments, in which:

1 is a schematic diagram of the structure of the main body of the cage in the self-locking interbody cage system under the spinal endoscope according to the present invention;

2 is a schematic structural diagram of the self-locking lag screw in the self-locking interbody cage system under spinal endoscopy according to the present invention;

Fig. 3 is the structural schematic diagram of the cage holder in the self-locking interbody cage system under spinal endoscopic according to the present invention;

FIG. 4 is a schematic structural diagram of the screw handle in the self-locking interbody cage system under the spinal endoscope according to the present invention.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the embodiments described herein are only used to explain the present invention, but not to limit the present invention.

The purpose of the invention is to provide a self-locking interbody cage system under spinal endoscopic, which is used to solve the problem of how to insert an intervertebral cage to achieve rapid stability after spinal endoscopic decompression. The self-locking intervertebral cage system of the invention has strong supporting strength, self-locking pulling force design, fast bone fusion efficiency, can effectively improve the efficiency of percutaneous endoscopic-assisted fusion under the microscope, and greatly improves the safety of the operation. specifically,

Referring to Figures 1-4, the present embodiment proposes a self-locking interbody cage system under spinal endoscopic, including a cage body 10, a self-locking lag screw 20, a cage holder 30 and a screw handle 40, which are self-locking. The locking lag screw 20 is connected to the cage body 10, the cage holder 30 is used to connect and operate and install the cage body 10, and the screw handle 40 is connected to and operates to install the self-locking lag screw 20. The self-locking interbody cage system is suitable for Endoscopic lumbar fusion in the spine.

As shown in FIG. 1 , the outlines of the top surface 11 and the bottom surface 12 of the cage body 10 are convex arcs, the front end 13 is in the shape of a bullet head, and the tail end 14 is round and blunt. There is a groove 16 for connecting the cage holder 30, and two threaded nail holes 17 are provided inside the tail end for matching the self-locking lag screw 20; wherein the two nail holes 17 are inclined and inclined The directions are different, with one sloping inwards and the other sloping outwards. The top surface 11 of the cage main body 10 is a barb-like porous structure, and several barbs 11-1 are arranged, a plurality of through holes 11-2 are opened between the barbs, the side surfaces are flat, and the side surfaces are also provided with a plurality of side holes 18, Includes rectangular side holes and round side holes. The fusion body 10 as a whole resembles a flat honeycomb structure. The cage body 10 is 23 or 25 cm in length, 8, 10, 12 or 14 mm in height, and 10 mm in width.

As shown in FIG. 2 , the distal end 21 of the self-locking lag screw 20 is a self-tapping hollow design, the thread spacing is tight, and gradually widens toward the proximal end 22 , and the proximal end 22 is designed to be self-locking. The tail end nail holes 17 are matched. Among them, the diameter of the self-locking lag screw 20 can be 4.5, 5.5 or 6.5 mm, and the length is 16 mm.

As shown in FIG. 3 , the cage holder 30 is made of stainless steel, the front end 31 is connected to the groove 16 at the tail end of the cage body, and the end 32 is a spiral design. When rotated clockwise, the tail end of the cage holder 30 is connected to the cage The bodies 10 are tightly connected, and the tail ends are separated when rotated counterclockwise. Among them, the cage holder 30 has a length of 330 mm and a diameter of 8 mm.

As shown in FIG. 4 , the screw handle 40 has a hollow cylindrical shape, and can achieve strong internal fixation with the vertebral body after the self-locking lag screw 20 is sent into the screw hole 17 along the guide wire. The diameter of the connection between the screw handle 40 and the self-locking lag screw 20 is 4.0 mm, and the diameter of the main body is 4.5 mm, which can realize screw implantation under the endoscope.

When applied, in the process of spinal endoscopic-assisted lumbar fusion surgery,

Before using the system device, pre-insertion of percutaneous screw guide wire is required; the facet joint on one side is excised using a microscopic trephine, the intervertebral foramen is exposed, the ligamentum flavum is excised, and the spinal canal and nerve root canal are decompressed and exposed. Exit nerve root and walking root; assisted resection of intervertebral disc and cartilage endplate treatment under microscope;

When ready, the endoscope needs to be replaced, along the guide wire and the guide rods are expanded step by step, the cage is implanted into the working cannula, the endoscope is placed, the tip of the outer cannula is found under the endoscope, and it is guided to the outside of the walking root and On the ventral side, after protecting the nerve root, rotate the inner cannula 90-180° counterclockwise to fully protect the outlet nerve root;

According to the treatment of the intervertebral space, a suitable size of the cage body 10 is selected, and the cage holder 30 is used to stabilize it and put it into the intervertebral space, and the depth of the C-arm machine perspective is appropriate;

Insert the endoscope again, adjust the angle, insert the guide wire under the endoscope, and use the screw handle 40 to insert the self-locking lag screw 20 under the endoscope.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that it can still be The technical solutions described in the foregoing embodiments are modified, or some technical features thereof are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. a self-locking interbody cage system under spinal endoscope, is characterized in that comprising cage main body, self-locking lag screw, cage holder and screw handle, and described self-locking lag screw is connected in described cage main body Above, the cage holder is used to connect and operate and install the cage body, and the screw handle is used to connect and operate the self-locking lag screw. The self-locking interbody cage system is suitable for spinal endoscopic lumbar fusion. technique. 2. The self-locking interbody cage system under spinal endoscope according to claim 1, wherein the top surface and bottom surface of the cage main body are in convex arc shape, the front end is in the shape of a bullet head, and the tail end is a circle Blunt, with a rectangular through hole in the center, a groove outside the tail end for connecting the cage holder, and two threaded nail holes inside the tail end for matching the self-locking lag screw ; The top surface is a barb-like porous structure, and the sides are also provided with a plurality of side holes. 3. The spinal endoscopic self-locking interbody cage system according to claim 2, wherein the cage main body is 23 or 25 cm in length, 8, 10, 12 or 14 mm in height, and 10 mm in width. 4 . The self-locking interbody cage system under spinal endoscope according to claim 2 , wherein the two screw holes are arranged obliquely, and the inclination directions are different. 5 . 5. The self-locking interbody cage system under spinal endoscope according to claim 2, wherein the distal end of the self-locking lag screw is a self-tapping hollow design, the thread spacing is tight, and it gradually widens to the proximal end, and the proximal end gradually widens. The end is self-locking design, which matches with the nail hole at the tail end of the cage body. 6 . The self-locking interbody cage system under spinal endoscopy according to claim 5 , wherein the self-locking lag screw has a diameter of 4.5, 5.5 or 6.5 mm and a length of 16 mm. 7 . 7. The self-locking interbody cage system under spinal endoscopy according to claim 2, wherein the cage holder is made of stainless steel, the front end is connected with the groove of the tail end of the cage main body, and the end is a spiral design , the tail end of the cage holder is tightly connected with the cage body when rotated clockwise, and the tail end is separated when rotated counterclockwise. 8 . The self-locking interbody cage system under spinal endoscopy according to claim 7 , wherein the cage holder has a length of 330 mm and a diameter of 8 mm. 9 . 9. The self-locking interbody cage system under spinal endoscopy according to claim 2, wherein the screw handle is a hollow cylindrical shape, and the self-locking lag screw can be sent into the screw hole along the guide wire, and can be connected with the vertebral column. The body achieves strong internal fixation. 10. The self-locking interbody cage system under spinal endoscopy according to claim 9, wherein the diameter of the connection between the screw handle and the self-locking lag screw is 4.0mm, and the diameter of the main body is 4.5mm, which can realize endoscopic screw implantation.

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