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Preparation method of medical magnesium-silver alloy with controllable degradation rate

A technology of magnesium-silver alloy and degradation rate, applied in medical science, surgery, etc., can solve the problems of poor growth adaptability and achieve the effect of improving biocompatibility and controllable degradation rate

Pending Publication Date: 2022-02-25
BEIJING INSTITUTE OF TECHNOLOGYGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to design a method for preparing a magnesium-silver alloy material with a controllable degradation rate by using different extrusion ratios, aiming at the poor adaptability between the degradation of the implant material and the growth of the tissue at the implant site. Meet the specific requirements of different implant sites for alloy degradation performance

Method used

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  • Preparation method of medical magnesium-silver alloy with controllable degradation rate
  • Preparation method of medical magnesium-silver alloy with controllable degradation rate
  • Preparation method of medical magnesium-silver alloy with controllable degradation rate

Examples

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Effect test

Embodiment 1

[0033] The steps for preparing Mg-3Ag alloys with different extrusion ratios are as follows:

[0034] (1) Determine the mass fraction of silver in the magnesium-silver alloy to be 3%.

[0035] (2) Calculate the mass of the required elements in advance before smelting, and use an electronic balance to weigh and prepare according to the calculation result.

[0036] (3) Put high-purity magnesium into a steel crucible together with a corresponding amount of silver. at 750°C in 98% argon (Ar) and 2% sulfur hexafluoride (SF 6 ), and then stirred at 200 rpm for half an hour.

[0037] (4) After the temperature drops to 730°C, pour the melt into a low carbon steel mold preheated to 550°C. In order to better separate the casting from the mold, hexagonal boron nitride is used as a mold release agent. The molds were kept at 680° C. for 15 minutes under protective atmosphere and cooled directly in flowing room temperature water at a rate of 100 cm / min. When the liquid level inside rise...

Embodiment 2

[0042] Example 2: The steps of preparing Mg-6Ag alloys with different extrusion ratios are as follows:

[0043] (1) Determine the mass fraction of silver in the magnesium-silver alloy to be 6%.

[0044] (2) Calculate the mass of the required elements in advance before smelting, and use an electronic balance to weigh and prepare according to the calculation result.

[0045] (3) Put high-purity magnesium into a steel crucible together with a corresponding amount of silver. at 750°C in 98% argon (Ar) and 2% sulfur hexafluoride (SF 6 ), and then stirred at 220 rpm for half an hour.

[0046](4) After the temperature drops to 750°C, pour the melt into a low carbon steel mold preheated to 550°C. In order to better separate the casting from the mold, hexagonal boron nitride is used as a mold release agent. The molds were kept at 680°C for 20 minutes under protective atmosphere and cooled directly in flowing room temperature water at a rate of 120 cm / min. When the liquid level insi...

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Abstract

The invention belongs to the field of biomedical materials, and particularly relates to a preparation method of a medical magnesium-silver alloy with a controllable degradation rate. The magnesium-silver alloy comprises the following components in percentage by mass: 3-6% of silver, less than 0.0022% of Fe, less than 0.001% of Cu, less than 0.001% of Ni and the balance of magnesium. The silver element is added into magnesium, the strength and antibacterial performance of the magnesium alloy are improved, microstructure parameters such as the alloy grain size, the second phase size and the volume ratio are regulated and controlled through different alloy element proportions and different extrusion ratios, and then the degradation rate of the magnesium-silver alloy is regulated and controlled; therefore, the differentiated requirements of different implantation parts on mechanical and degradation properties can be met. The magnesium-silver alloy prepared by the preparation method disclosed by the invention can be applied to implants such as oral barrier membranes, bone nails, bone lamellas and the like.

Description

technical field [0001] The invention relates to the field of biomedical materials, in particular to a preparation method of a medical magnesium-silver alloy with a controllable degradation rate. Background technique [0002] In recent years, with the improvement of people's living standards and the rapid development of medical technology, dental implants and other clinical restoration methods have been widely used. However, problems such as insufficient bone mass and surrounding bone mass of implants need to be solved urgently, and Guided Bone Regeneration (GBR), as a new method, has been more and more widely recognized in clinical practice. The basic principle of GBR technology is based on the characteristics of fast migration of fibroblasts and slow migration of osteoblasts. The barrier film is implanted between the soft and hard tissues to mechanically isolate the bone defect and the surrounding connective tissue, so as to avoid the ingrowth of soft tissue that interferes...

Claims

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Application Information

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IPC IPC(8): C22C23/00C22C1/02C22F1/06A61L31/14A61L31/02A61L31/16
CPCC22C23/00C22C1/02C22F1/06A61L31/022A61L31/148A61L31/16A61L2300/104A61L2300/404
Inventor 谭成文刘冠旗郭传瑸韩建民于晓东郭雨竹
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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