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Double-layered bionic pseudo-structure of cervical intervertebral disci, and its mfg. process

A technology for a cervical intervertebral disc and a manufacturing method, which is applied in the field of manufacturing engineering, can solve the problems of a single structure and cannot simulate the outer layer of the fibrous annulus of the cervical intervertebral disc, etc., and achieves the effect of good shape memory function.

Inactive Publication Date: 2008-11-19
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the common cervical intervertebral disc prosthesis has a single structure, often using a single-layer cylindrical structure, which cannot simulate the double-layer structure of the outer annulus fibrosus and the inner nucleus pulposus of a normal cervical intervertebral disc.

Method used

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  • Double-layered bionic pseudo-structure of cervical intervertebral disci, and its mfg. process
  • Double-layered bionic pseudo-structure of cervical intervertebral disci, and its mfg. process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Example 1: see figure 1 , 2, the present invention firstly adopts CAD to construct human intervertebral disc prototype, the model of nucleus pulposus prosthesis 2 and the model of annulus prosthesis 1 are all designed to be cylindrical, adopts rapid prototyping to obtain the mold of annulus prosthesis 1 and nucleus pulposus prosthesis The mold of body 2, and make the centroid of the mold of nucleus pulposus prosthesis 2 and the centroid of the mold of annulus prosthesis 1 coincide, the base of the mold of nucleus pulposus prosthesis 2 and the bottom of the mold of annulus fibrosus 1 The edge distance is 2.25mm, and the cylindrical diameter difference between the mold of the fibrous annulus prosthesis 1 and the mold of the nucleus pulposus prosthesis 2 is 6.88mm; add polyvinyl alcohol powder into boiling water with a mass ratio of 2:10, and place it in a boiling water bath Stir until the polyvinyl alcohol is completely dissolved to obtain a polyvinyl alcohol aqueous solu...

Embodiment 2

[0010] Embodiment 2: Firstly, CAD is used to build a human intervertebral disc prototype, the models of the nucleus pulposus prosthesis 2 and the annulus prosthesis 1 are designed to be cylindrical, and rapid prototyping is used to obtain the mold of the annulus prosthesis 1 and the nucleus pulposus prosthesis 2, and make the centroid of the mold of the nucleus prosthesis 2 coincide with the centroid of the mold of the annulus prosthesis 1, the base of the mold of the nucleus prosthesis 2 and the base of the mold of the annulus prosthesis 1 The distance is 2.25mm, and the cylindrical diameter difference between the mold of fibrous annulus prosthesis 1 and the mold of nucleus pulposus prosthesis 2 is 6.88mm; add polyvinyl alcohol powder into boiling water with a mass ratio of 2.3:10, and stir in a boiling water bath Until the polyvinyl alcohol is completely dissolved to obtain a polyvinyl alcohol aqueous solution; inject the polyvinyl alcohol aqueous solution into the mold of th...

Embodiment 3

[0011] Embodiment 3: First, CAD is used to construct a human intervertebral disc prototype, the models of the nucleus pulposus prosthesis 2 and the annulus prosthesis 1 are designed to be cylindrical, and rapid prototyping is used to obtain the mold of the annulus prosthesis 1 and the nucleus pulposus prosthesis 2, and make the centroid of the mold of the nucleus prosthesis 2 coincide with the centroid of the mold of the annulus prosthesis 1, the base of the mold of the nucleus prosthesis 2 and the base of the mold of the annulus prosthesis 1 The distance is 2.25mm, and the cylindrical diameter difference between the mold of fibrous annulus prosthesis 1 and the mold of nucleus pulposus prosthesis 2 is 6.88mm; add polyvinyl alcohol powder into boiling water with a mass ratio of 2.1:10, and stir in a boiling water bath Until the polyvinyl alcohol is completely dissolved to obtain a polyvinyl alcohol aqueous solution; inject the polyvinyl alcohol aqueous solution into the mold of ...

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Abstract

A biotic dual-layer artificial cervical intervertebral disc is composed of a cylindrical fibre ring and a cylindrical nucleus pulposus. Its preparing process includes such steps as CAD for configuring the prototype, fast shaping to obtain the moulds of artificial fibre ring and artificial nucleus pulposus, filling the aqueous solution of polyvinyl alcohol in the mould of artificial nucleus pulposus, to obtain the artificial nucleus pulposus, fixing it in the another mould, fixing a L-shaped fixer in the mould, immersing the mould in the solution of polyurethane and solidifying agent, and solidifying.

Description

technical field [0001] The invention belongs to the field of manufacturing engineering, in particular to a double-layer bionic cervical intervertebral disc prosthesis structure and a manufacturing process thereof. Background technique [0002] Cervical spondylosis is a common and frequently-occurring disease that plagues human beings. At present, there are many surgical methods, including simple discectomy, spinal fusion, and various internal fixation devices. For simple intervertebral discectomy, the height of the intervertebral space cannot be restored, and the factors that cause compression on the nerve roots cannot be fundamentally relieved; while various fusions and internal fixation instruments restore the height of the intervertebral space, but they have a negative effect on the inner spine. The impact of the mechanical environment is large, which makes the operative segment of the spine lose its motion function, leads to changes in the biomechanical properties of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61F2/44
CPCA61F2/44A61F2002/30001
Inventor 李涤尘张永睿卢秉恒连芩王坤正樊立宏
Owner XI AN JIAOTONG UNIV
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