CN216021553U

CN216021553U - Thoracolumbar spine anterior locking and pressurizing fusion device

Info

Publication number: CN216021553U
Application number: CN202121685182.2U
Authority: CN
Inventors: 牛升波; 侯藏龙; 邵杰; 翟骁; 杨明园; 周潇逸; 程亚军; 陈锴; 杨桓; 李博; 张毅; 宋琳; 刘康; 唐亮; 王士博; 白玉树; 李明
Original assignee: First Affiliated Hospital of Naval Military Medical University of PLA
Current assignee: First Affiliated Hospital of Naval Military Medical University of PLA
Priority date: 2021-07-23
Filing date: 2021-07-23
Publication date: 2022-03-15
Anticipated expiration: 2031-07-23

Abstract

The utility model relates to a thoracolumbar spine anterior locking pressurizing fusion cage which comprises a fixed wing, a fusion wing and a screw, wherein the fixed wing and the fusion wing are arranged in a vertical structure; the fixed wing is an upper locking compression steel plate and a lower locking compression steel plate which are in limited contact, the whole fixed wing is in an 8-shaped structure, three composite holes which are distributed in an inverted triangle are formed in the upper end of the fixed wing, the lower end face of the fixed wing is also provided with composite holes which are distributed in an inverted triangle, the composite holes in the lower end face of the fixed wing and the composite holes in the upper end face of the fixed wing are arranged in a symmetrical structure, and a connecting screw hole for placing a handle is further formed in the middle of the fixed wing; barbs are arranged on the upper surface and the lower surface of the fusion wing, and a hollow structure is arranged in the fusion wing; its advantages are: the utility model has simple operation, strong practicability and firm fixing effect, can realize stable mechanical fixation, thoroughly avoids the problems of sedimentation, slippage and the like of the fusion wing, ensures the absolute stability of the fixed segment and is beneficial to promoting the intervertebral fusion.

Description

Thoracolumbar spine anterior locking and pressurizing fusion device

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a thoracolumbar anterior locking and pressurizing fusion device.

Background

Since the generation of the internal fixation technology of spinal fusion, the reliable internal fixation stability and the higher fusion rate of the internal fixation technology are rapidly popularized and applied in clinic, and the instability of spinal segments caused by spinal degeneration or surgical treatment and the like is well solved. The spinal fusion internal fixation technology has different realization modes according to different operation approaches, the initial fusion internal fixation is the lumbar posterolateral fusion internal fixation (PLF), and the spinal fusion internal fixation technology is widely applied due to simple operation and reliable curative effect, but has poor treatment effect on the discogenic pain. Posterior intervertebral fusion (PLIF) is to implant the fusion cage in the intervertebral disc space, through the three-column fixation of way of escape pedicle of vertebral arch screw system, intervertebral fusion cage promotes with nail stick system each other, finally reach stable fixed, but the way of escape is operation to the muscle tissue strip many, the destruction of the column structure behind the backbone especially posterior longitudinal ligament complex is big, although nail stick system can rebuild the stability of backbone, but the operation wound is big, it is many to bleed, it is long, the postoperative recovery time is long, it is big to interfere with dura mater sac and nerve root, and the damage of the muscle function of backbone back all produces harmful effects to the recovery of postoperative function. Transforaminal interbody fusion (TLIF), which was invented to reduce the extent of trauma, reduces the damage caused by PLIF technology to some extent, interferes only with one dural sac and nerve roots, retains one articular process, has little effect on spinal stability, but still inevitably causes greater damage to muscle function.

Therefore, the operation modes with relatively small trauma, such as a lumbar vertebrae abdominal cavity anterior Approach (ALIF), a thoracolumbar vertebrae anterior pleura approach, a lumbosacral vertebrae operation anterior approach through peritoneum, a lumbar vertebrae retroperitoneal psoas major muscle approach (OLIF) and the like, are invented, and under the appropriate operation indications, such as patients without serious narrowing of intervertebral space, slight slippage and the like, the fusion device is placed in the anterior way to recover the height of the intervertebral space, indirect decompression is carried out, and finally the spinal column is fused and stabilized with relatively slight trauma. However, complications such as slippage, settlement, and detachment of the posterior fusion cage sometimes occur, and therefore, the anterior steel plate or the fusion cage is applied in combination with the fixing screw, however, the currently used steel plate and the fusion cage are separated and not integrated, so that slippage and settlement of the fusion cage cannot be completely prevented even if the anterior steel plate is pressurized independently. The fusion cage can be prevented from moving and settling by using the fixing screws, but the risk of reducing the fusion rate exists in the opposite direction holding forces of the head end and the tail end, and the screws are screwed into the vertebral bodies at the head end and the tail end from the fusion cage, so that the bone grafting bed is damaged to a certain extent, the area of the bone grafting bed is reduced, and the fusion rate can also be reduced.

The current thoracolumbar anterior surgery is a decompression and bone grafting fusion internal fixation therapy (ALIF, OLIF) suitable for thoracolumbar fractures, tumors and degenerative diseases, a larger fusion device can be implanted through the anterior surgery to directly recover the height and convexity of an anterior column, increase the height of an intervertebral space and achieve the purpose of indirect spinal canal and nerve root canal decompression on the basis of removing the direct decompression of intervertebral discs. Compared with the traditional internal fixation (PLF, PLIF) for posterior decompression bone grafting fusion and the internal fixation (TLIF) for intervertebral foramen approach decompression bone grafting fusion, the anterior surgery does not pass through the posterior of the vertebral canal and has the advantages of no damage to the dural sac and nerve roots and no damage to the posterior structure.

The Chinese patent application: CN211066972U discloses a cervical vertebra anterior locking compression steel plate, which includes a steel plate body with an aspect ratio greater than 1, the steel plate body is provided with multiple groups of parallel locking compression members in the length direction thereof, the locking compression members include four locking compression holes with an elliptical projection and a fusion window, the four locking compression holes are symmetrically arranged in the length direction and the width direction of the steel plate body respectively with the fusion window as the center, one end of the locking compression hole close to the fusion window is defined as a proximal end, one end far away from the fusion window is defined as a distal end, the side wall of the locking compression hole at the proximal end has an oblique upward inclination angle relative to the surface of the steel plate body, and the side wall of the locking compression hole at the distal end is vertically arranged relative to the surface of the steel plate body. The utility model solves the problems that the anterior cervical steel plate in the prior art can not pressurize an operation segment, and complications such as the displacement and the separation of a fusion cage, overlarge intervertebral space, the formation of intervertebral prosthetic joints, the failure of intervertebral fusion and the like are easy to occur, but the device has poor fixing effect and is easy to slide the fusion cage, so the device has certain defects in the aspect of use.

Therefore, to sum up, need for an easy operation now urgently, the practicality is strong, and fixed effect is firm, can thoroughly avoid subsiding, sliding of fusion wing, ensures that fixed section is absolutely stable, does benefit to the novel chest lumbar vertebrae front road locking pressurization fusion ware that promotes intervertebral fusion, but about this kind of novel chest lumbar vertebrae front road locking pressurization fusion ware, has not seen the report at present.

Disclosure of Invention

The utility model aims to solve the problems in the prior art, and particularly provides a thoracolumbar anterior locking and pressurizing fusion device.

In order to achieve the purpose, the utility model adopts the technical scheme that:

a thoracolumbar anterior locking pressurizing fusion cage comprises a fixed wing, a fusion wing and a screw, wherein the fixed wing and the fusion wing are made into an integral structure and are arranged in a vertical structure; the fixed wing is a locking compression steel plate with upper and lower limited contacts, the whole material of the fixed wing is made of titanium magnesium alloy, the whole fixed wing is of an 8-shaped structure, three composite holes which are distributed in an inverted triangle are formed in the upper end of the fixed wing, the composite holes are divided into a locking screw hole and a compression screw hole, the locking screw hole and the compression screw hole are arranged in an integrated structure and are located in the same hole, the compression screw hole is arranged at a position close to the fixed fusion wing, and two holes of the compression screw hole, which are far away from the fusion wing, are locking screw holes; the lower end face of the fixed wing is also provided with composite holes distributed in an inverted triangle, the composite holes in the lower end face of the fixed wing and the composite holes in the upper end face of the fixed wing are arranged in a symmetrical structure, and the middle position of the fixed wing is also provided with a connecting screw hole for placing a handle; the fusion wing is a titanium magnesium alloy fusion device, barbs are arranged on the upper surface and the lower surface of the fusion wing, and a hollow structure is arranged in the fusion wing.

In the thoracolumbar anterior locking compression fusion cage, as a preferred scheme, the composite hole is placed at an inclined angle, and the inclined angle is 15-30 degrees.

In the thoracolumbar anterior locking and pressurizing fusion cage, as a preferable scheme, the screws can be divided into cancellous screws and common screws, the cancellous screws are located in the locking screw holes, and the common screws are located in the pressurizing screw holes.

In the thoracolumbar anterior locking compression fusion cage, as a preferable scheme, the connection part of the fixed wing and the fusion wing is made of titanium magnesium alloy connection material, and the length of the connection part is suitable for ensuring that the fusion wing is positioned in front of the vertebral body 2/3.

In the thoracolumbar anterior locking compression fusion cage, as a preferable scheme, the height of the fusion wing is set to be 8mm,10mm,12mm and 14 mm; the corresponding lengths are set to 22mm,16mm,32mm and 36 mm.

The utility model has the advantages that:

1. the utility model has simple operation, strong practicability and firm fixing effect, realizes stable fixation of mechanics, and thoroughly avoids the problems of sedimentation, slippage and the like of the fusion wing; meanwhile, the device can also pressurize, the three-hole fixing wings are distributed in an inverted triangular mode, and the angle stability of the locking nails and the steel plate ensures that the fixing segments are absolutely stable, so that intervertebral fusion is promoted.

Drawings

FIG. 1 is a schematic structural view of the thoracolumbar anterior locking compression fusion cage of the present invention.

FIG. 2 is a schematic sectional partial structure view of the thoracolumbar anterior locking compression fusion device of the present invention.

Detailed Description

The utility model will be further illustrated with reference to specific embodiments. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that various changes and modifications can be made by those skilled in the art after reading the disclosure of the present invention, and equivalents fall within the scope of the appended claims.

The reference numerals and components referred to in the drawings are as follows:

1. fixed wing 2. fusion wing 3. screw

4. Composite hole 5, locking screw hole 6 and pressurizing screw hole

7. Connecting screw hole 8, barb 9, spongy bone screw

10. Common screw

Embodiment 1 thoracolumbar anterior locking and pressurizing fusion cage

Referring to fig. 1 and 2, fig. 1 is a schematic structural view of the thoracolumbar anterior locking compression fusion device of the present invention. FIG. 2 is a schematic sectional partial structure view of the thoracolumbar anterior locking compression fusion device of the present invention.

The device mainly relates to an integrated locking and pressurizing fusion device which can achieve stable mechanics, thoroughly avoid the problems of sedimentation, slippage and the like of fusion wings, further ensure the absolute stability of a fixed segment and be beneficial to fusion; the thoracolumbar spine anterior locking pressurizing fusion cage mainly comprises a fixed wing 1, a fusion wing 2 and screws 3, wherein the fixed wing 1 and the fusion wing 2 are manufactured into an integral structure, the fixed wing 1 and the fusion wing 3 are arranged in a vertical structure, and the fusion wing and the fixed wing of the locking pressurizing fusion cage are integrated, so that angle fixing and pressurizing fixing can be realized by matching with the screws (locking screws and pressurizing screws); the fixed wing 1 is an upper locking compression steel plate and a lower locking compression steel plate which are in limited contact, the whole material of the fixed wing 1 is made of titanium magnesium alloy, the whole fixed wing 1 is of an 8-shaped structure, the fixed wing 1 is used for fixing an upper vertebral body and a lower vertebral body and is connected with and compresses the fusion wing, three composite holes 4 which are distributed in an inverted triangle shape are formed in the upper end of the fixed wing 1, the composite holes 4 are divided into locking screw holes 5 and compression screw holes 6, the locking screw holes 5 and the compression screw holes 6 are arranged in an integrated structure and are positioned in the same hole, the compression screw holes 6 are arranged at positions close to the fixed fusion wing 2, and two holes far away from the fusion wing 2 are the locking screw holes 5; the lower end face of the fixed wing 1 is also provided with inverted-triangular-distribution composite holes 4, the composite holes on the lower end face of the fixed wing and the composite holes on the upper end face of the fixed wing are arranged in a symmetrical structure, the three holes on the fusion wing can be positioned at different positions by the inverted-triangular-distribution composite holes 4, so that the screws are distributed in a divergent manner in the vertebral body after being placed, the holding force is enhanced, the fusion wing is prevented from generating adverse conditions such as settlement, slippage and the like, and the middle position of the fixed wing 1 is also provided with a connecting screw hole 7 for placing a handle; fuse wing 2 for titanium magnesium alloy fusion ware, all be provided with barb 8 on its upper and lower surface, built-in cavity, fuse wing 2 implantable intervertebral space, support backbone front column, the centrum about fusing realizes stably, 8 directions of barb on its surface are forward, can further strengthen stably.

In this embodiment, the composite holes 4 are preferably disposed at an inclined angle, wherein the inclined angle is 15-30 °, and this arrangement ensures the screw to be divergently distributed in the vertebral body after being implanted, thereby enhancing the holding force and the fixing force.

In this embodiment, preferably, the screw 3 can be divided into a cancellous screw 9 with a diameter of 4.5mm and a common screw 10, the cancellous screw 9 is located in the locking screw hole 5, the common screw 10 is located in the compression screw hole 6, and the length of the cancellous screw and the length of the self-drilling self-tapping common screw can be selected from 25mm, 30mm, 35mm, 40mm, 45mm and 50mm to meet the needs of clinical patients.

In this embodiment, the connection portion between the fixed wing 1 and the fusion wing 2 is preferably made of titanium-magnesium alloy, the length of the connection portion is suitable for ensuring that the fusion wing is located in front of the vertebral body 2/3, the fixed wing and the fusion wing can be connected into a whole by the arrangement, the length of the connection portion is suitable for ensuring that the fusion wing is located in a suitable position in the intervertebral space, and then the contact area between the fixed wing and the upper and lower vertebral bodies is reduced in the limited contact surface of the fixed wing, so that local blood supply is facilitated, and fusion is promoted.

In the present embodiment, it is preferable that the height of the fusion wing 2 is set to 8mm,10mm,12mm,14 mm; the corresponding length is set to be 22mm,16mm,32mm and 36mm, and the setting can be selected for different patients, so that the practicability of the device is improved.

The use method of the utility model comprises the following steps: the intervertebral space bone grafting bed prepares the back, select the locking pressurization of suitable size with the examination mould and fuse the ware, it is suitable moulding, it beats and presses the bone grafting to fuse the wing, will fuse the ware and implant intervertebral space through putting into the handle, select arbitrary one side fixed wing pressurization hole to twist suitable length self-drilling self-tapping ordinary screw after that, screw up, at the eccentric twist of opposite side pressurization hole 2 nd piece self-drilling self-tapping ordinary screw, screw up the pressurization, at last with head and the tail both sides fixed wing locking hole twist suitable length self-drilling self-tapping spongy bone screw, perspective screw position, whether the length is suitable, then put into and finish.

It should be noted that: the utility model has simple operation, strong practicability and firm fixing effect, realizes stable fixation of mechanics, and thoroughly avoids the problems of sedimentation, slippage and the like of the fusion wing; meanwhile, the device can also be pressurized, the three-hole fixing wings are reversely distributed in a triangular mode, and the angular stability of the locking nails and the steel plate ensures that the fixing segments are absolutely stable, so that the intervertebral fusion is promoted; the device determines required anatomical data through finite element analysis, cadaver specimen biomechanical analysis and cadaver dissection, determines the proper size of each component part, and gradually popularizes clinical application through a series of detection and clinical tests such as medical instrument strict fatigue resistance, and the like.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and additions can be made without departing from the principle of the present invention, and these should also be considered as the protection scope of the present invention.

Claims

1. The thoracolumbar spine anterior locking pressurizing fusion cage is characterized by comprising a fixed wing, a fusion wing and a screw, wherein the fixed wing and the fusion wing are made into an integral structure and are arranged in a vertical structure; the fixed wing is a locking compression steel plate with upper and lower limited contacts, the whole material of the fixed wing is made of titanium magnesium alloy, the whole fixed wing is of an 8-shaped structure, three composite holes which are distributed in an inverted triangle are formed in the upper end of the fixed wing, the composite holes are divided into a locking screw hole and a compression screw hole, the locking screw hole and the compression screw hole are arranged in an integrated structure and are located in the same hole, the compression screw hole is arranged at a position close to the fixed fusion wing, and two holes of the compression screw hole, which are far away from the fusion wing, are locking screw holes; the lower end face of the fixed wing is also provided with composite holes distributed in an inverted triangle, the composite holes in the lower end face of the fixed wing and the composite holes in the upper end face of the fixed wing are arranged in a symmetrical structure, and the middle position of the fixed wing is also provided with a connecting screw hole for placing a handle; the fusion wing is a titanium magnesium alloy fusion device, barbs are arranged on the upper surface and the lower surface of the fusion wing, and a hollow structure is arranged in the fusion wing.

2. The thoracolumbar anterior locking compression fusion cage of claim 1, wherein said compound aperture is placed at an oblique angle, said oblique angle being 15-30 °.

3. The thoracolumbar anterior locking compression cage of claim 1, wherein said screws are classified into cancellous screws and normal screws, and said cancellous screws are located in locking screw holes and said normal screws are located in said compression screw holes.

4. The thoracolumbar anterior locking compression fusion cage of claim 1, wherein the connection between the fixed wing and the fusion wing is made of titanium magnesium alloy, and the length of the titanium magnesium alloy is suitable for ensuring that the fusion wing is located in front of the vertebral body 2/3.

5. The thoracolumbar anterior locking compression fusion cage of claim 1, wherein the height of the fusion wings is set to 8mm,10mm,12mm,14 mm; the corresponding lengths are set to 22mm,16mm,32mm and 36 mm.