Biomedical materials refer to materials that interact with biological systems to diagnose, treat, repair or replace tissues and organs in the body or enhance their functions. It can be divided into medical metal materials, medical polymer materials, medical ceramic materials, etc., of which medical metal materials account for a large proportion, especially orthopedic products and cardiovascular and cerebrovascular products.

In particular, titanium alloy has the characteristics of high strength, low density, non toxicity, good biocompatibility and corrosion resistance. It has been used in the medical field and has become the preferred material for medical products such as artificial joints, bone trauma, spinal orthopedic internal fixation system, dental implants, artificial heart valves, interventional cardiovascular stents, surgical instruments and so on.

Advantages of medical titanium alloy

① Biocompatibility: it has minimal biological reaction with human body, non-toxic and non-magnetic. As a human implant, it has no side effects on human body.

② Mechanical properties: high strength and low elastic modulus, which not only meets the mechanical requirements, but also is close to the elastic modulus of human natural bone, which can reduce the stress shielding effect and is more conducive to the growth and healing of human bone.

③ Corrosion resistance: titanium alloy is a biological inert material, which has good corrosion resistance in the human physiological environment and does not pollute the human physiological environment.

④ Light weight: generally, the density of titanium alloy is only 57% of that of stainless steel. After implantation into the human body, the load of the human body is greatly reduced.