Lumbar vertebra posterior zero-incisura fusion cage, driving-in system and driving-in method

Abstract

The invention discloses a lumbar vertebra posterior zero-incisura fusion cage, a driving-in system and a driving-in method. After the fusion cage is driven into the intervertebral body, the distraction angle of the distraction part rotationally connected to the fusion cage fixing part is controlled through the screwing-in depth of the distraction nail, and the selected-in depth of the distraction nail can be selected according to the actual situation requirement so as to meet the distraction height of different intervertebral bodies; meanwhile, the fusion cage is opened on one side, namely, the opening part is opened towards one side of the upper vertebral body, and after opening, compared with a fusion cage located on one side of the anterior vertebral body, the fusion cage located on one side of the posterior vertebral body can stably and effectively jack up the anterior column of the upper vertebral body upwards so that the anterior column of the upper vertebral body can recover the physiological camber of the anterior column of the upper vertebral body. Moreover, the fixing parts of the fusion cage are respectively locked on the upper vertebral body and the lower vertebral body through the lock nails, so that the expanded fusion cage is prevented from shifting, the problem of shifting of the fusion cage caused by the extrusion of the vertebral body during the movement of a human body after an operation is avoided, and the position of the fusion cage between the vertebral bodies is kept stable and unchanged.

Description

technical field [0001] The invention relates to the technical field of posterior lumbar vertebra implantation, in particular to a zero-notch fusion device for the posterior lumbar vertebra, an insertion system and an insertion method. Background technique [0002] Lumbar fusion cage is a kind of: after spinal canal decompression and intervertebral disc resection, in order to restore the normal height of the intervertebral space and the physiological curvature of the lumbar spine, so that the upper and lower vertebral bodies can be more stably fused together after the removal of the intervertebral disc. Devices implanted in the body. [0003] In the early stage, only the cage was implanted, and the cage slipped into the spinal canal after surgery. Now the routine practice is: after implanting the cage, the upper and lower pedicle screw rods are also added for fixation. This approach greatly reduces the postoperative slippage of the cage, and also significantly improves the ...

AI Technical Summary

Problems solved by technology

The application of the anterior lumbar zero-profile fusion device has also been carried out in foreign countries, but the disadvantages of the anterior lumbar fusion device are: decompression of the spinal canal, after discectomy, another anterior incision is required to place the fusion device, and the trauma is relatively large. Big

However, the practical application is more difficult than the anterior lumbar approach. For example, a posterior lumbar intervertebral fusion system disclosed in Chinese invention patent CN109806034A, and a fusion device is placed in the posterior lumbar spine. The venous plexus, fat tissue, residual fibrous ring, and proliferative osteophyte tissue block the line of sight, and it is almost impossible to insert the fusion cage into the intervertebral space and then install the locking nail.

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