Expandable and recoverable intervertebral fusion device under spine endoscope

Abstract

The invention discloses an expandable and recoverable intervertebral fusion device under a spine endoscope, and belongs to the field of medical instruments. The expandable and recoverable intervertebral fusion device comprises an implantation frame, a mounting pipe arranged on the implantation frame, an implantation cavity arranged in the implantation frame and supporting blocks which are arranged on two sides of the implantation frame and are slidably connected with the implantation frame, wherein a first ejection surface is respectively arranged at the bottom end of each supporting block; ejection blocks slidably connected with the supporting blocks are arranged in the implantation cavity; a second ejection surface corresponding to the first ejection surface is arranged on one end, which is close to each supporting block, of each ejection block; one end, which is far away from each supporting block, of each ejection block is in threaded connection with the implantation frame; a bone grafting hole communicating with the inner cavity of the mounting pipe and the implantation cavity is arranged in each ejection block; and a screw-in rod detachably connected with the bone grafting hole is arranged in the mounting pipe. The expandable and recoverable intervertebral fusion device has a small size, is convenient in implantation, is used for intervertebral fusion surgery under the spine endoscope, and is beneficial for simplifying an intervertebral fusion surgery operation under the endoscope and improving an intervertebral fusion success rate.

Description

technical field [0001] The invention relates to the field of medical instruments, in particular to a retractable and recoverable intervertebral fusion device under the spinal endoscope. Background technique [0002] Degenerative diseases of the spine are one of the more common diseases, mainly due to the degeneration of the nucleus pulposus of the intervertebral disc and the attachment of the vertebral body, which causes the adjacent spinal nerve roots to be stimulated or compressed, resulting in local pain and nerve injury symptoms. Its pathogenic mechanism is complex, the prevalence rate is high, and the patient population is wide. It is a frequently-occurring disease that plagues human health. The surgical treatment of such diseases is mainly open surgery, with large trauma, heavy bleeding, slow postoperative recovery, and high surgical costs. Minimally invasive surgery is the key to solving the above problems and is the mainstream development direction. Endoscopic techn...

AI Technical Summary

Problems solved by technology

The disadvantages of this type of expandable fusion cage are: although the main body of this type of fusion cage can adapt to the height or area of ​​the intervertebral space of different segments, the range of distraction height is limited, and the volume is generally large, and it is more generally suitable for open surgery. The volume fusion cage damages the original stable structures such as the articular process and intervertebral disc fibrous ring too much, resulting in spinal instability. After surgery, nail rods must be added for fixation, which not only increases the difficulty of the operation, prolongs the operation time, and increases the operation cost, but also damages the nerve root. The probability of damage is also greater, and it is not recyclable

[0005] At the same time, the gap between the connecting components of the existing fusion device is too large, and the supporting platform is easy to swing; and the trapezoidal design of the supporting platform of the fusion device has the disadvantage that the contact surface between the side of the fusion device support platform and the fusion device shell is too small, resulting in the fusion device in the Poor stability when performing opening and closing actions, which affects the implant 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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