CN112957161A - Wing-shaped fixing titanium net for cervical vertebra lateral bone grafting distraction - Google Patents

本发明公开一种颈椎侧方植骨撑开翼状固定钛网，包括钛网本体，钛网本体为中空柱状，钛网本体包括左片和右片，左片的一侧与右片的一侧转动连接，左片的另一侧与右片的另一侧通过夹紧装置搭接。本发明采用侧方撑开技术，利用侧方撑开，将尖刺刺入两侧的残留椎体，将残留椎体利用起来，增加稳定性，减少钛网移位、患者瘫痪的风险；侧方撑开技术联合斜向螺钉固定，采用了简单有效的撑开固定装置，拧紧螺钉后可以有效维持固定和撑开状态，通过斜向螺钉到残留椎体，和现有的前路椎弓根钉固定不同，椎弓根钉风险很高，操作很复杂，增加了固定的强度和稳定性。

The invention discloses a wing-shaped fixed titanium mesh for lateral bone grafting of cervical vertebrae. Rotating connection, the other side of the left piece and the other side of the right piece are overlapped by the clamping device. The present invention adopts the lateral opening technique, uses the lateral opening to pierce the thorns into the residual vertebral bodies on both sides, utilizes the residual vertebral bodies, increases stability, and reduces the risk of titanium mesh displacement and patient paralysis; The square distraction technique combined with the oblique screw fixation adopts a simple and effective distraction fixation device. After tightening the screw, the fixed and distracted state can be effectively maintained. The oblique screw is used to reach the residual vertebral body and the existing anterior pedicle. Unlike screw fixation, the pedicle screw has a high risk and is complicated to operate, which increases the strength and stability of the fixation.

Wing-shaped fixing titanium net for cervical vertebra lateral bone grafting distraction

Technical Field

The invention relates to the field of medical instruments, in particular to a wing-shaped fixing titanium net for distraction of a lateral bone graft of cervical vertebra.

Background

Cervical spondylotomy (ACCF) is suitable for patients who can not obtain good spinal decompression after simple discectomy, and can be used for combined posterior spinal canal enlargement based on ACCF for patients who have both anterior and posterior spinal compression. The ACCF is also an ideal choice for patients with vertebral body lesions (tumors, etc.), cervical dislocation and kyphotic deformity.

The existing ACCF surgical titanium mesh has the following defects:

1. the risk complication of the displacement and sinking of the titanium mesh after the operation of the patient is high; the titanium mesh is not fixed and is easy to shift into the vertebral canal, so that the paralysis and even death of the patient are caused; the incidence rate of postoperative titanium mesh subsidence can reach 70 percent.

2. The crossing distance after the vertebral body is removed in the ACCF operation is longer, and the creeping substitution distance of bones is longer, so that the fusion time is longer, the fusion efficiency is lower, and the re-operation revision risk is higher; the bone grafting has poor healing effect and long time, so that a lot of patients still do not heal in 6 months and 12 months, and need to wear the external cervical fixation branch for a long time, which is not beneficial to the early rehabilitation of the patients and the return to normal life and work;

3. after the existing straight titanium net is placed on the cervical vertebra, because the cervical vertebra of a human body has a certain physiological radian and is not straight, two ends of the titanium net can not be in good contact with a patient end plate, only one part of the titanium net is in direct contact with a vertebral end plate, and in addition, the titanium net sinks after operation, the radian loss of the cervical vertebra of the patient can be further aggravated, and the radian of the cervical vertebra can not be well reconstructed and maintained.

Disclosure of Invention

The invention aims to provide a wing-shaped fixed titanium mesh for distraction of a lateral bone graft of a cervical vertebra, which adopts a lateral distraction technology, utilizes lateral distraction, and pierces spikes into residual vertebral bodies on two sides to utilize the residual vertebral bodies, thereby increasing the stability and reducing the risks of titanium mesh displacement and paralysis of a patient.

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

the invention discloses a wing-shaped fixed titanium net for distracting bone grafting on the lateral sides of cervical vertebrae, which comprises a titanium net body, wherein the titanium net body is in a hollow column shape, the titanium net body comprises a left piece and a right piece, one side of the left piece is rotatably connected with one side of the right piece, and the other side of the left piece is lapped with the other side of the right piece through a clamping device.

Further, the top and the bottom of the left piece and the right piece are respectively connected with an annular bone grafting component.

Preferably, the annular bone grafting parts are circular rings, the number of the annular bone grafting parts is 4, the tops of two of the annular bone grafting parts are flush with the top of the titanium mesh body, and the bottoms of the other two annular bone grafting parts are flush with the bottom of the titanium mesh body.

And further. The outer side wall of the titanium mesh body is provided with sharp thorns.

Preferably, the number of the spikes is several, and the spikes are positioned on the left side wall and/or the right side wall of the titanium mesh body.

Preferably, the rotary connection is a hinge connection.

Preferably, the clamping device is a clip or a resilient clip.

Furthermore, the foldable titanium alloy mesh plate is positioned in front of the titanium mesh body, and is provided with a distraction device which is connected with the titanium mesh body.

Preferably, the thickness of the titanium alloy mesh plate is smaller than that of the side wall of the titanium mesh body.

Further, the present invention also includes a set screw.

The invention has the following beneficial effects:

1. the invention adopts the side propping technology, utilizes the side propping, and pierces the spikes into the residual vertebral bodies at the two sides, so as to utilize the residual vertebral bodies, increase the stability and reduce the risk of titanium mesh displacement and paralysis of the patient;

2. the invention adopts the combination of the side expanding technology and the oblique screw fixation, adopts a simple and effective expanding fixing device, can effectively maintain the fixing and expanding state after the screw is screwed down, and reaches the residual vertebral body through the oblique screw, which is different from the existing anterior pedicle screw fixation, the risk of the pedicle screw is very high, the operation is very complex, and the fixing strength and the stability are increased;

3. the side part is propped open to generate the stress of the side part, the stress can promote bone grafting fusion, and the long-term stability of the titanium mesh and the early rehabilitation of a patient are improved;

4. the bone grafting space is designed on the front side and two sides of the titanium mesh body, so that bone grafting in a wider range can be promoted, and fusion is accelerated;

5. the thin titanium alloy net is used for fixing the bone grafting material, so that the bone grafting material can be prevented from moving;

6. the annular bone grafting part can improve the supporting strength and stability of the titanium mesh body, a supporting bone grafting structure is established between the residual vertebral body and the upper and lower vertebral bodies, the stress of the central main body part of the titanium mesh and the upper and lower vertebral bodies is reduced, and the risk of sinking of the titanium mesh is reduced.

7. Annular bone grafting part will stride across a centrum and 2 bone "defect" regions of intervertebral space height and shorten to the region in 2 clearances, reduce the bone and crawl substituted distance, as long as remain the centrum and can fuse at 4 angles with upper and lower centrum, the once complete excision operation of centrum section has just obtained and has fused effect and stability, has shortened bone healing's time, accelerates patient's recovery, can promote early rehabilitation.

Drawings

FIG. 1 is a schematic structural view of a titanium mesh body;

FIG. 2 is a top view of the present invention;

FIG. 3 is a schematic view of the present invention in use;

fig. 4 is a schematic view of a state of use of a conventional titanium mesh.

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.

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.