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Medical degradable magnesium alloy interbody fusion cage

A technology of intervertebral fusion and magnesium alloy, which is applied in the field of intervertebral fusion, can solve problems such as stress shielding and improper selection of elastic modulus of inflammation, and achieve the effect of avoiding stress shielding, avoiding stress shielding effects, and avoiding non-specific inflammation

Inactive Publication Date: 2012-11-21
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problem that the existing intervertebral fusion device produces acidic substances during the degradation process, which will lead to inflammation, improper selection of elastic modulus, and stress shielding, and proposes a medical degradable magnesium alloy intervertebral fusion device

Method used

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specific Embodiment approach 1

[0021] Embodiment 1: The medical degradable magnesium alloy intervertebral fusion device in this embodiment is a polygonal column with a through hole (3) along its axis, and its upper endplate contact surface (1) and lower endplate The surface of the contact surface (2) has occlusal teeth (5), which is characterized in that the surfaces of the upper endplate contact surface (1) and the lower endplate contact surface (2) have protruding studs (4), which consist of Made of Mg-Sn-Mn alloy, the mass percentage content of Sn is 1%~3%, the mass percentage content of Mn is 0.15%~1%, and the mass percentage content of impurity elements Fe, Cu and Ni is 0~0.006 %, the balance is Mg.

[0022] The material selection basis of the present invention is: magnesium is one of the metal elements with the most abundant reserves on the earth, and is also one of the most abundant cations in the human body. It is an indispensable and important nutritional element for the human body. Medical materi...

specific Embodiment approach 2

[0032] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the mass percentage content of the described Sn is 2%, the mass percentage content of Mn is 0.5%, and the mass percentage content of the impurity elements Fe, Cu and Ni is 0.005%, the mass percentage content of Mg is 97.495%. Other structures and connections are the same as in the first embodiment.

specific Embodiment approach 3

[0033] Specific embodiment three: The medical degradable magnesium alloy intervertebral fusion device in this embodiment is a polygonal column with a through hole (3) along its axis, and its upper endplate contact surface (1) and lower endplate The surface of the contact surface (2) has occlusal teeth (5), which is characterized in that the surfaces of the upper endplate contact surface (1) and the lower endplate contact surface (2) have protruding studs (4), which consist of Made of Mg-Sn-Mn-Zn alloy, wherein the mass percentage content of Sn is 1%~5%, the mass percentage content of Mn is 0.15%~1.5%, the mass percentage content of Zn is 0.5%~3%, and the impurity The mass percentage content of elements Fe, Cu and Ni is 0~0.006%, and the balance is Mg.

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Abstract

The invention discloses a medical degradable magnesium alloy interbody fusion cage, relates to an interbody fusion cage and aims at solving problems that inflammation is caused due to acidic materials which are produced by existing interbody fusion cages during degradation and stress shielding can occur due to inappropriate selection of elasticity modulus. The medical degradable magnesium alloy interbody fusion cage is made of Mg-Sn-Mn series alloy or Mg-Sn-Mn-Zn series alloy; the medical degradable magnesium alloy interbody fusion cage comprises an upper end plate contact surface (1) and a lower end plate contact surface (2), a through hole (3) is opened at the center of the fusion cage, the upper end plate contact surface (1), the lower end plate contact surface (2) and the through hole (3) are polygons which are of the same shape, two protuberant studs (4) are respectively arranged on the upper end plate contact surface (1) and the lower end plate contact surface (2), and the upper end plate contact surface (1) can be an inclined surface to form an angle theta with the lower end plate contact surface (2). The medical degradable magnesium alloy interbody fusion cage can be applied to the field of degradable and absorptive medical instrument manufacturing.

Description

technical field [0001] The present invention relates to an intervertebral fusion device. Background technique [0002] In recent years, cervical intervertebral fusion has been widely used in the surgical treatment of cervical degenerative diseases and trauma. Its main function is to maintain the height of the intervertebral space, promote intervertebral bony fusion, and reduce the amount of autologous bone to a certain extent. , to avoid some complications caused by it. At present, the materials of cervical intervertebral fusion cages are mainly non-degradable metals (NiTi alloy, Ti 6 Al 4 V, etc.) material and poly carbon fiber material. The former has better histocompatibility, but the postoperative metal remains in the body for life, which increases the trouble of permanent retention and the possibility of a second operation. The strength and quality have a certain influence, and at the same time, it will produce a certain degree of settlement, which is easy to cause ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61L31/02A61L31/10A61L27/04A61L27/34A61F2/44A61B17/70
CPCA61F2/44A61F2002/30001
Inventor 李莉李珍郑玉峰李新林刘西伟
Owner HARBIN ENG UNIV
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