Due to the progress of society and the development of technology, the market share of biological materials has been more and more, and it is still growing at a faster rate. The proportion of hard tissue replacement materials such as artificial teeth, artificial joints and artificial bones in the field of medical biomaterials is increasing and growing rapidly.
Titanium and titanium alloy materials are widely used in the nuclear industry, chemical and petrochemical, aerospace, sporting goods, dental and medical repair and other fields. Titanium alloy materials have also been selected as the best material for replacing or repairing failed hard tissues (structural biomedical applications).
The corrosion resistance of pure titanium metal is very good, but its biocompatibility and comprehensive mechanical properties are poor, the strength is relatively low and the production cost is also very expensive, and the appearance of titanium alloy can be a good replacement.
Titanium alloy than stainless steel, industrial pure (CP)Nb,Cr-Co alloy and CP-TA and other medical application materials, can better meet the performance requirements, because its surface will form an oxide layer and produce excellent corrosion resistance and low elastic modulus.
Medical titanium alloy is not only non-toxic, light weight, high specific strength, has excellent biocompatibility and corrosion resistance, can be used as implants implanted in the human body, etc., is an ideal medical metal material, and titanium reserves in the crust is very rich, has the potential for further development, is an ideal and broad application prospects of biomedical engineering materials.
At present, pure titanium (Titanium Grade 1, Titanium Grade 2; Titanium Grade 1 is pure titanium greater than 99.6%, and pure titanium less than 99.6 is Titanium Grade 2) and Ti-6Al-4V, Ti-5Al-2.5Fe, Ti-6Al-7Nb alloys are widely used in the medical field. However, the new β-type titanium alloy has become a research hotspot of new medical titanium alloys with better biocompatibility and mechanical compatibility, and is the most potential technology in the field of medical implants.
In the future, the production technology of titanium alloy will also develop in the direction of low modulus and high strength, and from the development trend, β-type titanium alloy will become the direction of future development and the "leader" of the medical titanium alloy market.
