Biomedicine implant material with controllable degrading rate and its application

Abstract

The present invention relates to biomedicine metal implant material, and is especially biomedicine implant material with controllable degrading rate and its application. The biomedicine implant material with controllable degrading rate has a magnesium or magnesium alloy matrix and a coated degradable polymer layer with thickness controlled within 0.01-5 mm. The biodegradation is completed step by step so as to ensure the mechanical performance of the material during degradation and match the degradation rate with the service period of the implanted device. The biomedicine metal implant material of magnesium or magnesium alloy may be used in preparing temporary or short term implanted device, such as degradable blood rack and peripheral rack, bone fracture plate and bone nail for inner fixing, tissue engineering rack, etc.

Description

technical field

[0001] The invention relates to a biomedical metal implant material, in particular to a biomedical implant material with a controllable degradation rate and its application. Background technique

[0002] At present, most of the degradable materials used in medicine are polymer materials. The degradable polymer materials have the following problems: 1. Low strength, low hardness and rigidity; 2. Poor degradation controllability, degradation time is not proportional to strength and rigidity, degradation In the process, it is easy to lose strength prematurely and cause the device to fail early; 3. The processing stability is poor, and the processing of degradable polymer materials requires special processing environments and equipment; Both patient needs and the development of biomaterials are important.

[0003] The corrosion resistance of magnesium and magnesium alloys is poor, and the standard potential of pure magnesium is -2.37V, especially when it contain...