The surface modification methods of
titanium and titanium alloy are mainly divided into mechanical surface modification (such as sand blasting, cutting and polishing, etc.), chemical surface modification (such as micro-arc oxidation, anodic oxidation and chemical deposition, etc.), physical modification (such as friction stir processing, spraying, etc.) and biochemical modification. Compared with other surface modification methods, micro-arc oxidation has many advantages, such as no pollution, corrosion resistance, friction and wear resistance and excellent biocompatibility. On the basis of anodic oxidation, it increases the voltage to reach the breakdown voltage of the oxide film beyond the Faradite zone, sparks discharge occurs at the anode, and porous ceramic oxide film is formed in situ on the surface of the material, so that the plasma oxide film has the high performance of ceramic film. Phytic acid is a kind of organic compound in plants that chelates with metal multiple teeth. It can form complexes with polyvalent ions and form a monomolecular film on the metal surface to prevent surface oxidation. The surface corrosion resistance can be improved by applying it to the surface corrosion protection of materials. Bone fragmentation is a dry root and stem of the water-dragon orthopaedic plant, which can strengthen the kidney and strengthen the bone. Modern pharmacology shows that the extract can promote the proliferation and development of osteoblast, and it has been found that it can inhibit the growth of osteoclasts. The isolated components such as naringin, naringin and TFA can promote the growth of human osteoblasts or human bone marrow stromal stem cells. Most scholars only focus on the basic research level of the extract of bone fractals. There is no clinical transformation.
