The low elastic mold titanium-zirconium dental implant material and its preparation method, the low elastic mold titanium-zirconium dental implant material has a needle-like and lamellar precipitation structure during the sintering cooling process, which is conducive to the titanium-zirconium alloy to obtain good mechanical properties and biocompatibility properties, the preparation method includes the following steps: The titanium zirconium powder is mixed evenly according to a certain proportion, after pressing and forming, the temperature is raised to 800℃ in a protective atmosphere for heat preservation, and finally the vacuum sintering is performed at 1200 ~ 1300℃ to obtain the low elastic mold titanium zirconium dental implant material. The relative density of the low elastic modulus titanium-zirconium alloy is 94.1% ~ 94.5%, the compressive strength varies in the range of 1292.8 ~ 1498.5MPa, and the elastic modulus varies in the range of 21.8 ~ 22.8GPa. When the strength is guaranteed, the elastic modulus is low, and the mechanical compatibility with the human upper and lower jaws is good. Good biocompatibility with oral epithelial and fibrous tissues; The preparation method is simple, and it is an ideal dental implant material with low elastic mold.
Titanium metal has good wear resistance, corrosion resistance, and no reaction with human body fluids, no stimulation to body tissues, and has excellent mechanical properties, is an ideal replacement material for human tissues. Titanium has been used in clinical practice for decades, and the products prepared by it include dental crowns, artificial bones, artificial heart valves, etc. Among the elements compatible with titanium, zirconium is not only non-toxic, but also has outstanding corrosion resistance. The oxide film formed on the surface of titanium is a rutile structure closely combined with titanium, which has a great protective effect on the lower alloy, and the alloy shows high stability and corrosion resistance. At the same time, zirconium and titanium are the same subgroup elements, belonging to the same hexagonal crystal system. The chemical properties are similar, the biological compatibility is very good, and the high temperature β phase and low temperature α phase have complete solid solubility.
Although titanium and titanium alloys show excellent properties in mechanical properties and corrosion resistance, traditional titanium alloys generally have a high elastic modulus, and the most widely used Ti-6Al-4V alloys even contain Al and V elements with toxic side effects. Although tantalum zirconium alloy has excellent corrosion resistance and good biocompatibility, too low elastic modulus can not guarantee its strength to meet the requirements of dental implant materials, and the price of tantalum is very expensive. With zirconium as the main alloying element, titanium zirconium alloy has excellent mechanical properties and biocompatibility. Compared with tantalum zirconium alloy, titanium zirconium alloy has an elastic modulus closer to human bone on the premise of ensuring strength, which is more suitable for medical materials, especially for the development of oral implant materials.
