Expandable and recoverable synchronous bone grafting set for intervertebral fusion under percutaneous spine endoscope

Abstract

The invention discloses an expandable and recoverable synchronous bone grafting set for intervertebral fusion under a percutaneous spine endoscope, and belongs to the field of medical instruments. The bone grafting set comprises an implantation frame, a bone grafting tube arranged on the implantation frame, an implantation cavity formed in the implantation frame and a supporting block arranged in the implantation frame and slidably connected with the implantation frame; a first ejection face is arranged at the bottom end of the supporting block; an ejection block slidably connected with the supporting block is arranged in the implantation cavity; a second ejection face corresponding to the first ejection face is arranged at the end, close to the supporting block, of the ejection block; the end, away from the supporting block, of the ejection block is in threaded connection with the implantation frame; a bone grafting hole communicated with an inner cavity of the bone grafting tube and the implantation cavity is formed in the ejection block; and a screw-in rod detachably connected with the bone grafting hole is arranged in the bone grafting tube. The bone grafting set has the advantages of being small in size, convenient to implant, expandable and recoverable, is capable of achieving synchronous bone grafting, is safe and convenient, is used for intervertebral fusion under the spine endoscope, facilitates simplification of intervertebral fusion operation under the endoscope, and improves the success rate of intervertebral fusion.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a retractable and recoverable synchronous bone graft set for intervertebral fusion under percutaneous spinal endoscope. Background technique [0002] Percutaneous endoscope-assisted intervertebral fusion device implantation and intervertebral bone fusion have become the main minimally invasive techniques for the clinical treatment of lumbar degenerative diseases. The minimally invasive surgical technique of plate cleaning, intervertebral bone grafting and intervertebral cage implantation to complete intervertebral fusion has many advantages such as small trauma, low risk, and fast recovery. The main indications are intervertebral disc herniation, lumbar spinal stenosis, lumbar instability or lumbar degenerative spondylolisthesis. [0003] The shape and structure of different intervertebral fusion implants affect their functionality. For example, the mainstream bullet-type fusion c...

AI Technical Summary

Problems solved by technology

However, although the main body of this type of fusion cage can adapt to the height or area of ​​intervertebral space in different segments, the distraction height and range are limited, and the internal mechanical structure occupies a complex area, and the bone graft space is limited, which is not conducive to the completion of intervertebral bone graft fusion. Not only increases the difficulty of the operation, prolongs the operation time, but also has a greater probability of nerve root damage, increases the risk of the operation, and is not recyclable

[0004]At the same time, the gap between the existing cage connecting components is too large, and there is a disadvantage that the support platform is easy to swing; and the trapezoidal design of the cage support platform, there are The disadvantage of too small contact surface with the fusion cage shell leads to poor stability of the fusion cage during opening and closing, which affects the implantation effect, and the contact area with the vertebral body of the spine is small, the stability is low, and the bone grafting function cannot be realized

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