Minimally Invasive Intervertebral Fusion

Abstract

The invention discloses a minimally invasive intervertebral fusion device, which comprises a retractable or expandable spreader and a support chain supporting the space opened by the spreader; the support chain is composed of multiple unit bodies hinged to each other A long chain that can be closed, the cross-section of each unit body is trapezoidal, and hinge points are set on the two vertical sides of the outer surface, so that multiple unit bodies can be hinged to each other through hinge points, and the gap between two adjacent unit bodies They can be rotated within a certain range around the hinge point, so that the opposite adjoining surfaces of two adjacent unit bodies are attached to each other. The minimally invasive intervertebral fusion device of the present invention can be used in minimally invasive lumbar intervertebral disc and thoracolumbar intervertebral fusion operations, and realizes the entry and exit of various parts through small incisions, with short time, simple and convenient operation, and good supporting effect. The closed structure formed by the support chain can maintain a tight and stable support after the expansion part is taken out; the support chain of the frame structure increases the bone graft area and bone graft space, increases the amount of bone graft, and can promote the fusion of the lumbar intervertebral space Better, faster fusion.

Description

technical field [0001] The invention relates to a minimally invasive intervertebral fusion device and an application method thereof. Background technique [0002] With the increasing number of patients with lumbar intervertebral disc herniation, researchers have invented some artificial intervertebral discs or alternative intervertebral supports or fillers after long-term research. At present, it is difficult for the existing intervertebral fusion device to be implanted in the intervertebral space in the minimally invasive surgical channel and to maintain the stable support of the intervertebral space. It is often necessary to combine the posterior screw fixation system and implant it between the vertebral endplates. Wedge-shaped intervertebral fusion, in this solution, both the front and back of the vertebral body need to be fixed, the workload is heavy, and the operation time is long. Open surgery must be used, the operation area is large, the cost is high, and the patient...

AI Technical Summary

Problems solved by technology

At present, it is difficult for the existing intervertebral fusion device to be implanted in the intervertebral space in the minimally invasive surgical channel and to maintain the stable support of the intervertebral space. It is often necessary to combine the posterior screw fixation system and implant it between the vertebral endplates. Wedge-shaped intervertebral fusion, in this solution, both the front and back of the vertebral body need to be fixed, the workload is heavy, and the operation time is long. Open surgery must be used, the operation area is large, the cost is high, and the patient needs a recovery period after surgery. Long, not conducive to the rapid recovery of the patient

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