Adjustable intervertebral fusion device and holding device

Abstract

The invention relates to an adjustable interbody fusion cage which is used in the spinal interbody fusion and a holder thereof. The interbody fusion cage comprises a back support section (1), four limbs (2) which are connected with the four corners of the back support section and a bolt (3) which is arranged in a hollow cavity surrounded by the four limbs. The four limbs are folded inward and are provided with an internal thread which is matched with an external thread of the bolt. The surface of the back support section is provided with an octahedron clutch (1.2). The holder comprises an outer sleeve (4), an inner sleeve (5) and a procession device (6), and is sleeved with the octahedron clutch (1.2) through a seam (4.1) which is at the front end of the outer sleeve. The inner sleeve (5) is put into the outer sleeve (4). A front-end thread section (5.1) can be screwed into a centre round hole (1.3) of the fusion body and is used for blocking the outer sleeve (4). The procession device (6) is arranged in the inner sleeve (5) and is used for screwing the bolt from the back end to the front end of a cavity (2.2) formed by the four limbs, causing the four limbs to be opened. As the fusion cage is smaller before being adjusted, the fusion cage is easy to be implanted, at the same time, does little damage to the rear small bone and the bone end plate.

Description

technical field [0001] The invention relates to the technical field of medical devices, and relates to an adjustable intervertebral fusion device and a holder thereof for spinal intervertebral bone graft fusion. The height and width of the part of the fusion device corresponding to the front support section can be adjusted. Background technique [0002] In recent years, intervertebral fusion cages have been widely used in spinal surgery, mainly for intervertebral space reconstruction after discectomy. The existing intervertebral fusion device is usually a hollow hexahedron, such as "a kind of intervertebral fusion device for lumbar posterior oblique implantation" (patent number: ZL200420081725.x), and the hexahedron is divided into a front support section and a rear support section And the three parts of the threaded section between the front and rear support sections, the upper and lower sides of the hollow hexahedron in contact with the lamina are provided with large round...

AI Technical Summary

Problems solved by technology

In addition, as far as the treatment of simple intervertebral disc herniation is concerned, intervertebral fusion can maintain intervertebral height, slow down the degeneration of intervertebral discs in adjacent segments, and can avoid re-herniation of intervertebral discs and reduce the rate of multiple reoperations. When the existing rectangular fusion cage is implanted, it will cause great damage to the bony structure, and its immediate stability is weak. It often needs to be stabilized with a rear internal fixation system, which not only increases medical expenses, but also increases the risk of trauma and surgery

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