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Cervical vertebra intervertebral disc prosthesis

A technology of intervertebral discs and prostheses, applied in the medical field, can solve problems such as frontal closure, and achieve the effects of reducing resistance, increasing width, and reducing width

Inactive Publication Date: 2015-03-25
WEST CHINA HOSPITAL SICHUAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the deficiencies in the prior art, the object of the present invention is to provide a cervical intervertebral disc prosthesis, by adding a section of circular arc-shaped protrusions on the spherical protrusions of the upper and lower plates so that the cervical intervertebral disc prosthesis and the end plate of the vertebral body are both It can be in close contact and retain a long distance of frontal sliding, which also solves the problem of frontal closure after prosthesis implantation

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0024] The cervical intervertebral disc prosthesis includes a prosthesis upper plate and a prosthesis lower plate that cooperate with each other. The upper surface of the prosthesis upper plate and the lower surface of the prosthesis lower plate are provided with arc-shaped protrusions 2. After the cervical intervertebral disc prosthesis is assembled The front is defined as the front end, and the rear is defined as the rear end. The front and rear ends of the arc-shaped protrusion 2 are respectively provided with hemispherical protrusions 1, and the arc surface of the arc-shaped protrusion 2 is tangent to the spherical surface of the hemispherical protrusion 1. , the intersection line of the arc-shaped protrusion 2 on the coronal plane after being sectioned by the coronal plane is a circular arc, and the intersection line of the arc-shaped protrusion 2 on the sagittal plane after being sectioned by the sagittal plane is a line segment, The length of the line segment is 1 mm. T...

Embodiment 2

[0026] The cervical intervertebral disc prosthesis includes a prosthesis upper plate and a prosthesis lower plate that cooperate with each other. The upper surface of the prosthesis upper plate and the lower surface of the prosthesis lower plate are provided with arc-shaped protrusions 2. After the cervical intervertebral disc prosthesis is assembled The front is defined as the front end, and the rear is defined as the rear end. The front and rear ends of the arc-shaped protrusion 2 are respectively provided with hemispherical protrusions 1, and the arc surface of the arc-shaped protrusion 2 is tangent to the spherical surface of the hemispherical protrusion 1. , the intersection line of the arc-shaped protrusion 2 on the coronal plane after being sectioned by the coronal plane is a circular arc, and the intersection line of the arc-shaped protrusion 2 on the sagittal plane after being sectioned by the sagittal plane is a line segment, The length of the line segment is 2mm. Th...

Embodiment 3

[0028] The cervical intervertebral disc prosthesis includes a prosthesis upper plate and a prosthesis lower plate that cooperate with each other. The upper surface of the prosthesis upper plate and the lower surface of the prosthesis lower plate are provided with arc-shaped protrusions 2. After the cervical intervertebral disc prosthesis is assembled The front is defined as the front end, and the rear is defined as the rear end. The front and rear ends of the arc-shaped protrusion 2 are respectively provided with hemispherical protrusions 1, and the arc surface of the arc-shaped protrusion 2 is tangent to the spherical surface of the hemispherical protrusion 1. , the intersection line of the arc-shaped protrusion 2 on the coronal plane after being sectioned by the coronal plane is a circular arc, and the intersection line of the arc-shaped protrusion 2 on the sagittal plane after being sectioned by the sagittal plane is a line segment, The line segment length is 2.5mm. The arc...

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Abstract

The invention relates to a cervical vertebra intervertebral disc prosthesis which comprises an upper prosthesis plate and a lower prosthesis plate. The upper prosthesis plate and the lower prosthesis plate are matched. Arc-shaped protrusions are arranged on the upper surface of the upper prosthesis plate and the lower surface of the lower prosthesis plate, the front portion of the assembled cervical vertebra intervertebral disc prosthesis is defined as the front end, the rear portion of the assembled cervical vertebra intervertebral disc prosthesis is defined as the rear end, and hemispheric protrusions are arranged on the front ends and the rear ends of the arc-shaped protrusions respectively. The arc-shaped protrusions are additionally arranged on the spherical protrusions of the upper plate and the lower plate so that the cervical vertebra intervertebral disc prosthesis can be in close contact with a vertebral endplate and slide forwards with a long distance, and the problem that the front portion is closed after the prosthesis is implanted is solved.

Description

technical field [0001] The invention relates to the field of medical technology, in particular to a cervical intervertebral disc prosthesis. Background technique [0002] Cervical intervertebral disc prosthesis is used to replace human diseased or damaged intervertebral discs. Through intervertebral disc replacement, the range of motion of the replaced segment can be preserved, and the original biomechanical characteristics of the cervical spine can be restored to a greater extent. The human intervertebral disc can make the cervical spine complete translation, rotation, lateral bending, forward flexion and backward extension. Therefore, an ideal cervical intervertebral disc prosthesis should also be able to complete the above-mentioned movements. The traditional intervertebral disc prosthesis design uses a ball-and-socket joint formed by a convex ball to a ball-socket to achieve rotation, lateral bending, flexion, and extension, but it cannot complete translational motions....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61F2/44
Inventor 刘浩蔡勇徐文利陈家康
Owner WEST CHINA HOSPITAL SICHUAN UNIV
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