Self-stabilizing 'ear' lumbar vertebra intervertebral fusion device for minimally invasive dual-cortical vertebral body screw

Abstract

The invention provides a self-stabilizing 'ear' lumbar vertebra intervertebral fusion device for a minimally invasive dual-cortical vertebral body screw, which includes a fusion device body, wherein the fusion device body is bent in an ear shape, the inner part of the fusion device body is vertical and hollow, the fusion device body includes a fusion device head part, a fusion device bottom part and a fusion device body part. The fusion device body part includes a fusion device central wall, an anterior implantation osseous cavity, and a posterior implantation osseous cavity. The fusion devicecentral wall is arranged in the fusion device body. The operation fusion device body is divided into the anterior implantation osseous cavity and the posterior implantation osseous cavity, and a plurality of through holes are arranged on the side walls of the anterior and posterior implantation osseous cavities. The bottom of the fuse device is provided with a plurality of threaded through holesfor fixing the fusion device main body and the plurality of threaded through holes are designed in a cross mode. The device has the self-stabilizing device, no pedicle screw rod system is needed for the fixation, the operation time is saved, the auxiliary injury is reduced, the fusion and carrying area are increased, and the possibility of sinking of the fusion device is reduced.

Description

technical field [0001] The invention relates to a minimally invasive double cortical vertebral screw self-stabilizing "ear" type lumbar intervertebral fusion device. Background technique [0002] The gold standard for surgical treatment of lumbar intervertebral degenerative disease is lumbar intervertebral fusion surgery, which improves intervertebral support through intervertebral fusion, restores the natural height of the intervertebral space, reconstructs the physiological curvature of the spine, and improves the fusion rate of intervertebral bone grafts. Solve the problem of low autogenous bone mass. At present, the lumbar interbody fusion devices on the market are all lumbar interbody fusion devices used in conventional open surgery, and there is no lumbar interbody fusion device specially used in minimally invasive lumbar interbody fusion surgery. [0003] Under-channel minimally invasive technology is applied to the treatment of lumbar degenerative diseases, which op...

AI Technical Summary

Problems solved by technology

The tunnel-down lumbar intervertebral fusion operation greatly reduces the side injuries caused by previous operations, such as MIS-TLIF, XLIF, and OLIF operations, but in terms of minimally invasive procedures, there are many aspects that need to be improved, including certain Due to the risk of secondary injury complications, and the disadvantages of long operation time, high auxiliary equipment, and frequent X-ray fluoroscopy radiation, the intervertebral fusion device used is mainly a single "bullet" type intervertebral fusion device

[0004] The current "bullet" intervertebral fusion cage is small in size and has no self-stabilizing device. It needs to be fixed with pressure and fixation with the pedicle screw rod internal fixation system to prevent the intervertebral fusion cage from loosening and withdrawing from the intervertebral space to cause serious complications; and , the upper and lower bearing areas are small, and the implantation of this kind of intervertebral fusion cage has the risk of fusion cage sinking; in addition, in terms of side injuries, when pedicle screws are implanted, there is a risk of screw misplacement, such as nerves, blood vessels, etc. Injury, scarring caused by dissection of the lumbar dorsal muscles, low back pain and discomfort caused by denutrition and atrophy, relatively large blood loss during and after the operation (relatively without external fixation devices), and accurate placement of pedicle screws increases the operation time and time. X-ray fluoroscopy radiation, XLIF and OLIF under the anterolateral channel require a special retractor to anteriorly open the abdominal organs, which may easily damage the genital femoral nerve, iliopsoas muscle, and lumbar plexus.

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