Titanium metal is not only strong, light, but also has good biocompatibility and corrosion resistance, so it is very suitable for manufacturing medical implants. It is also an ideal metal 3D printing material. Nitinol has a shape memory effect, which further broadens the application prospects of titanium alloys in the field of biomedical materials.
The personalized needs and high value-added characteristics of medical treatment are very consistent with the characteristics of 3D printing, making this field one of the most suitable areas for 3D printing technology. The demand for medical grade titanium powder and nickel-titanium alloy powder is increasing day by day.
Titanium and titanium alloys have a wide range of applications. This article mainly introduces its applications in biomedical applications.
Application field
Biomedicine: Dentures, prostheses, heart stents, orthopedic restorations, orthopedic implants…
The shape memory recovery temperature of medical nickel-titanium shape memory alloy is 36±2℃, which is in line with human body temperature and clinically shows biocompatibility equivalent to titanium alloy. However, due to the nickel-titanium memory alloy containing a large amount of nickel, if the surface is not properly treated, the nickel ions may diffuse and penetrate into the surrounding tissues, causing cell and tissue necrosis.
At present, surface modification of titanium alloys that have been developed to inhibit the release of toxic elements and enhance the biocompatibility and mechanical properties of the alloys to meet the standards used in the biomedical field has become a new research hotspot.
Research in recent years has mainly focused on physical modification methods, chemical modification methods and biochemical methods. Physical modification methods include plasma spraying method, ion implantation method, vapor deposition method, diamond-like carbon film plating method, laser cladding method, etc. Chemical modification methods include acid-base treatment method, micro-arc oxidation method, sol-gel method, Hydrothermal methods, etc., biochemical methods include biomimetic solution growth method, self-assembly method, etc.