Vertebral body fusion system approaching through minimally invasive pathway

Abstract

The invention relates to a vertebral body fusion system approaching through a minimally invasive pathway. The system comprises a bag and a supporting material, the bag can be folded or retract, an injection opening is formed in one end of the bag, the supporting material is injected into the bag from the injection opening, and the bag is of a long-strip-shaped structure in a full state; the surfaces, making contact with upper and lower vertebral bodies, of the bag are vertebral contact faces; a retractable limiting mechanism is arranged in the length direction of the side face of the bag; the width of the retractable limiting mechanism is smaller than or equal to the width of the bag in the naturally full state; when the bag is implanted in the intervertebral disc and the supporting material is injected, the cross section, parallel to the width direction and perpendicular to the vertebral contact faces, of the bag is in an H shape or is rectangular. The problems that the contact area of a fusion device and the upper and lower vertebral bodies, accordingly the bone grafting space is too small and the fusion effect of the upper and lower vertebral bodies is affected are solved. The system can adapt to the height of the intervertebral space in a stepless mode, and the contact area of the upper and lower vertebral bodies is controllable.

Description

technical field [0001] The invention relates to the field of spinal intervertebral fusion, in particular to a vertebral body fusion system approached through minimally invasive access. Background technique [0002] Degenerative diseases of the spine and its structural damage are an important cause of neck, shoulder, waist, and leg pain, sensory and motor function impairment or even loss. In the 1950s, Cloward first proposed Posterior Lumbar Fusion (PLIF), which has developed into one of the basic procedures of spinal surgery today. In 1986, Badgy and Kuslich designed an intervertebral fusion device (Cage) suitable for the human body, namely the BAK system. Since then, intervertebral bone graft fusion technology has been greatly developed and has become a basic surgical method for the treatment of spinal degenerative diseases and structural injuries. [0003] The principle of the intervertebral fusion device is centered on the diseased intervertebral space. After the interv...

AI Technical Summary

Problems solved by technology

However, there is no limiting structure on the periphery of the mesh body. When filling the first self-coagulating filler, the shape of the mesh body expanding is uncontrollable, resulting in an uncontrollable contact area with the upper and lower vertebral bodies, making the bone graft space too small affect the fusion effect of the upper and lower vertebral bodies

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