A retractable and retractable interbody fusion device under spinal endoscopic

Abstract

The invention discloses an intervertebral fusion device that can be stretched and recovered under a spinal endoscope, and belongs to the field of medical devices. It includes an implantation frame, a mounting tube arranged on the implantation frame, an implantation cavity arranged in the implantation frame, and a support block arranged on both sides of the implantation frame and slidably connected with the implantation frame. The end is provided with a first ejection surface, the implant cavity is provided with a top block that is slidably connected with the support block, and the end of the top block close to the support block is provided with a second ejection surface corresponding to the first ejection surface. One end of the top block away from the support block is threadedly connected with the implantation frame, the top block is provided with a bone graft hole that communicates with the inner cavity of the installation tube and the implant cavity, and the installation tube is provided with a screw that is detachably connected to the bone graft hole. The advancing rod has the advantages of small size and convenient implantation, and is used for spinal endoscopic interbody fusion, which is helpful to simplify the operation of endoscopic interbody fusion and improve the success rate of interbody fusion.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to an intervertebral fusion device that can be stretched and retrieved under spinal endoscopic. Background technique [0002] Spinal degenerative disease is one of the more common diseases, mainly due to the degeneration of the intervertebral disc nucleus and vertebral adnexa, which causes the adjacent spinal nerve roots to be stimulated or compressed, resulting in local pain and nerve damage symptoms. It is a frequently-occurring disease that plagues human health due to its complex pathogenic mechanism, high prevalence and wide afflicted population. The surgical treatment of this type of disease is mainly open surgery, which has 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 technology is an important way to achieve minimall...

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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