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Lumbar vertebra split type parallel fusion cage

A split-type, cage technology, used in prosthesis, medical science, spinal implants, etc., can solve problems such as the limitation of large-size cages, restore lumbar curvature function, increase bone graft space, reduce Effects of nerve damage

Pending Publication Date: 2021-04-30
XIAN HONGHUI HOSPITAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the above-mentioned defects in the prior art, the object of the present invention is to provide a lumbar split-type parallel fusion device, which solves the problem of limited placement of large size fusion devices through the posterior or posterolateral approach of the lumbar spine

Method used

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  • Lumbar vertebra split type parallel fusion cage
  • Lumbar vertebra split type parallel fusion cage
  • Lumbar vertebra split type parallel fusion cage

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Embodiment Construction

[0039] The present invention is described in further detail below in conjunction with accompanying drawing:

[0040] Such as Figure 1~3 As shown, a lumbar split parallel fusion device of the present invention includes a grooved member 1, a dovetail member 2 and a locking screw 3, the grooved member 1 is placed under the dovetail member 2, and the grooved member 1 and the dovetail member 2 are locked The screw 3 is connected, and the grooved member 1 and the dovetail member 2 are concentric arc-shaped banana-shaped structures. After the lumbar split parallel fusion cage is assembled, it presents a wedge-like structure with a thin upper end and a thicker lower end.

[0041] Such as Figure 4~5 As shown, the grooved member 1 includes a front working surface, a rear working surface, an upper working surface, a lower working surface, a left working surface and a right working surface, and the grooved member 1 is provided with a first hole running through the front working surface...

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Abstract

The invention belongs to the technical field of medical instruments, and discloses a lumbar vertebra split type parallel fusion cage, which comprises a grooved component, a dovetail component and a locking screw. A first bone grafting window penetrating through the front working face and the rear working face is formed in the grooved component, a dovetail groove rail is formed in the upper working face, and the dovetail groove rail is located at an opening in the right working face; a second bone grafting window penetrating through the front working face and the rear working face is formed in the dovetail component, a dovetail used for sliding in the dovetail groove rail is arranged on the lower working face, and a locking hole is formed in the right end face of the dovetail; in the using process, the grooved component is placed below the dovetail component, and the grooved component and the dovetail component are connected through the locking screw. Under the condition that nerves are not damaged, the fusion cage is placed through the posterior approach or the posterior outer side, and the fusion cage has a large end plate supporting area and a large bone grafting space. Meanwhile, single-side implantation can be achieved, double-side supporting is provided, and the function of recovering the curvature of the lumbar vertebra is achieved.

Description

technical field [0001] The invention belongs to the technical field of medical devices, and relates to a lumbar split-type parallel fusion device. Background technique [0002] Lumbar degeneration is a frequently-occurring disease in humans. With the advent of people's bad living habits and aging society in modern society, its incidence and surgery volume are increasing year by year worldwide, which brings great physical and mental obstacles to patients. Increased social medical burden. Lumbar degeneration with severe clinical symptoms, such as lumbar disc herniation, spondylolisthesis, and lumbar spinal stenosis, often requires lumbar intervertebral fusion surgery to achieve complete nerve decompression and restore lumbar stability. With the continuous improvement of spinal surgical techniques and instruments in recent years, lumbar interbody fusion is mainly divided into posterior interbody fusion (PLIF), transforaminal posterolateral interbody fusion (TLIF), and anterior...

Claims

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Application Information

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IPC IPC(8): A61F2/44
CPCA61F2/4455A61F2002/30281A61F2002/30383A61F2002/30433A61F2002/30507A61F2002/30784A61F2002/3093
Inventor 杨小卫郝定均
Owner XIAN HONGHUI HOSPITAL
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