A kind of degradable antibacterial magnesium alloy and preparation method thereof

Abstract

The invention provides a degradable antibacterial magnesium alloy and a preparation method thereof, and relates to the field of metal biomedical materials. The main active elements of the degradable antibacterial magnesium alloy material are Ag, Cu, Zn and Sr. Through the optimized design of magnesium alloy components, The corresponding mass fractions of each component are: Ag: 1.35~1.65%, Cu: 0.9~1.1%, Zn: 3.6~4.4%, Sr: 0.9~1.1%, Ca: 0.36~0.44%, the balance is Mg and others unavoidable impurities. After the magnesium alloy material implant is completed, it can be completely degraded to avoid secondary surgical removal, reducing medical costs and patient pain. At the same time, it improves the antibacterial property of the implant, promotes the formation of osteoblasts and inhibits osteoclasts. The function of cellular bone absorption; the degradable antibacterial magnesium alloy adopts a semi-solid rheological die-casting process. The microstructure of the product is evenly distributed, the internal tissue is dense, and there are few defects such as pores and segregation, which can meet the high quality and high performance of implant products. Accuracy requirements.

Description

technical field

[0001] The invention relates to the field of metal medical implant materials, in particular to a degradable antibacterial magnesium alloy and a preparation method thereof. Background technique

[0002] Magnesium alloys have become a new generation of medical biomaterials due to their excellent properties such as low density, high specific strength, good processability and biocompatibility, and are favored by biomaterial researchers and medical personnel. Compared with traditional medical metal materials and degradable polymer materials, magnesium alloy has the following outstanding advantages as a medical implant material:

[0003] (1) Good biocompatibility

[0004] Magnesium is an essential mineral for human metabolism and an indispensable element for the nervous system. Many cases are related to its deficiency. Magnesium is second only to calcium and phosphorus in the mineral content of the human body, and its content is second only to potassium in the io...

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