Nowadays, with the rapid development of industrialization, air pollution is becoming more and more serious, which has a great impact on people’s health. With the continuous improvement of people’s living standards, people’s health awareness is constantly enhanced, which makes people pay more and more attention to the protection of oral cavity.
With the rapid development of modernization, the application requirements of materials in medical field are more and more stringent. Because titanium and titanium alloy materials have many fusions with human body, bone necrosis in surgery, dental implants, porcelain teeth and materials of many therapeutic instruments are required. Medical treatment should be based on titanium and titanium alloys. More and more. Because of its advantages, small proportion, close to the proportion of human bone, high strength and strong corrosion resistance, it is an ideal and safe medical material. Titanium and its titanium alloys have excellent properties, can contact with human body well, and do little harm to human body, even can be neglected. The density of titanium and its elastic modulus are very close to human bone, so its excellent properties make its clinical application very advantageous. Therefore, the use of pure titanium and its titanium alloy to make some medical equipment compatible with the human body, such as dental porcelain teeth, implants, dentures, dental beds, brackets, bridges, crowns, artificial joints, bone plates, bone screw and bone fixation needles, has been widely used in clinical: the use of pure titanium mesh made of skeletal brackets, through clinical practice The experiment has been used in the reconstruction of necrotic bones, the repair of damaged bones and dura mater with microporous titanium mesh can be used and the cerebrospinal fluid system can be effectively protected, and the artificial heart valves and cages made of pure titanium have been successfully applied with good clinical effect. Pure titanium is a silver-white metal with a silver-gray luster. It can be used as deoxidizer in steelmaking and as a component of stainless steel and alloy steel. Titanium powder can be used as raw materials for pigments and paints, as well as as as as electrodes and condensers for power plants and environmental pollution control devices. But the strength is low. Titanium alloys have high strength, such as Ti-6AI-4V, which is commonly used, and the strength of Ti-6AI-4V reaches the level of general high strength steel. Titanium alloy has higher heat resistance, low temperature toughness and fracture toughness than its titanium material, so it can be used for many industrial parts, such as aircraft engine parts, rocket and missile parts. In the petroleum industry, it is mainly used as various containers and reactors. Titanium-nickel shape memory alloy has been widely used in instruments. Titanium nitride is similar to gold in color and can be used as decorative material. Titanium and titanium alloys are widely used in aviation industry, which is called “space metal”. In addition, they are widely used in shipbuilding industry, chemical industry, manufacturing machinery parts, telecommunications equipment, cemented carbide and so on. In addition, titanium alloys can also be used as artificial bones, dentures, ceramic teeth and medical devices to fix various broken bones because of their good compatibility with the human body. Titanium alloys are widely used in dental field due to their light weight, strong corrosion resistance, high temperature resistance and good weldability. Titanium and titanium alloys are widely used as dental implants because of their good mechanical properties and biocompatibility. The neck of the implant is made of titanium and titanium alloy with smooth surface, so as to facilitate the wrapping of fibrous tissue, form a good epithelial cuff area and prevent plaque accumulation. The porous structure of the implant enlarges the surface area of the implant, provides conditions for the attachment and growth of bone tissue, and is conducive to the retention of the implant. The cell experiment results of the ZnHA/titanium dioxide biological coating prepared by the experiment showed that the osteoblasts adhered well to the ZnHA/titanium dioxide coating, the cell proliferation ability on the material surface was enhanced, and the better cell attachment inhibited the bacterial attachment on the implant surface to a certain extent. In recent years, implant surface treatment technology has developed rapidly, including X-ray jet, mechanical grinding, plasma sputtering, sandblasting or acid etching. The hardness of pure titanium and titanium alloys is increased by seven times and two times respectively by high temperature ion nitriding treatment on titanium surface. The annual corrosion rate of nitrided titanium is only one third of that of non-nitrided titanium, and it is non-toxic to the surrounding tissues. Titanium nitrided by biological tissues has a slight and non-toxic reaction. The oxide film formed on the surface of titanium and titanium alloys can be corroded by the most widely used dental caries preventive agent, preventive polishing and fluoride damage in oral cavity. This corrosion product can cause degeneration and necrosis of tissue cells, nonspecific inflammation, allergic reaction and even tumorigenesis. Corrosion of the alloy materials will affect the color and strength of the prosthesis and cause adverse biological reactions such as cytotoxicity and allergy. Titanium and titanium alloys are used as substitutes for hard tissues. It can be used as dental materials in mosaics, crowns, bridging materials, dental implants, artificial roots and so on. In recent ten years, with the development of science and technology, titanium and titanium alloys have a broader prospect as new dental restorative materials. At present, Au, Ni-Cr, Co-Cr, stainless steel and other alloys are mainly used to make denture scaffolds. The alloys have good biocompatibility, but the price is expensive and the color is not ideal. Other alloys contain harmful elements such as Ni, Co and Cr. As a new dental restorative material, titanium has good affinity with human skeletal epithelial tissue and connective tissue. Its mechanical properties can also be comparable with other dental alloys, and its density is small, and the denture is comfortable. Ti-6Al-4V alloy has superplasticity and is easy to make denture base. The results show that the maxillary palatal bracket made of pure titanium has good flexural resistance and biocompatibility. Titanium has gradually become a more and more important material in denture prosthesis, and it has become an economic and biocompatible substitute for removable and fixed denture alloys. It has no allergy to human tissues and is inexpensive. Titanium is a kind of metal element with light density, high strength, corrosion resistance, excellent performance and abundant reserves. It is a better dental material in terms of industrial value, resource life and development prospects. Titanium material has a series of characteristics, which are beneficial to human body and quite safe. It is very suitable for human body. Titanium materials have special current characteristics, which can produce beneficial physiological effects and chemical stability to human body. In the course of treatment, people’s mental state is relaxed and not tense, which will not cause medical accidents. The high hardness and light density of titanium make it not easy to rust and deteriorate, and its performance is stable in application. Therefore, dental high-speed mobile phones, dental optical fiber mobile phones, dental implants, in the process of work, dental mobile phones have to enter the human oral cavity, contact with human teeth more, so the choice of surface materials, mostly using titanium and its alloy materials to process, less harm to humanity, and its performance comparison Stable and reliable. This kind of light weight, high strength and special current characteristics can play a good role in human body. So titanium is widely used in medical, medical and sports fields. Titanium and titanium alloys have been used as biomaterials in human body due to their excellent biocompatibility and corrosion resistance. In particular, titanium materials as dental implants are widely used in the human body, and there are countless orthopaedic operations made of titanium materials. With the development of modern industry, the development of modern medical care and the progress of science and technology, the development of Stomatology has been very rapid. With the development of dental implantation, Titanium Precision casting, welding, bonding and ceramic technology, titanium has been widely used in various branches of Stomatology and has become a necessary medical material. Titanium and titanium alloys are relatively perfect industrial materials because of their excellent properties. However, due to their high hardness, there are some difficulties in cutting. Cutting titanium alloy should proceed from choosing reasonable cutting tools, reducing cutting temperature and reducing bonding. Cutting tools with good red hardness, high bending strength and good thermal conductivity, such as YG cemented carbide, are selected. They have high hardness and can be suitable for the processing of titanium and its alloy materials. After choosing the right tool, we should also pay attention to the grinding of the tool. In the process of processing, the grinding of the main parameters of the tool is still very important. For example, when should the front angle be grinded and what should be paid attention to at the rear angle? These are all very important links, generally for the processing of titanium and its alloy materials. They all have special people to sharpen tools. Moreover, when processing titanium and its alloy materials, we must also pay attention to reducing cutting temperature and choosing good coolant, because good coolant can reduce the number of tool replacement, penetrate into the cutting tool surface, improve surface finish, and greatly reduce the reject rate, so the choice of lubricant is also indispensable. And it is very important that with the appropriate cutting fluid, the material viscosity will be reduced in the process of processing, which is conducive to processing and can save time and effort. In summary, after understanding the properties of titanium and titanium alloys, we find that their advantages are great. As long as they have mastered its processing and selected the appropriate tool and coolant, there will be nothing to prevent its application. It is not difficult to see that titanium and titanium alloys not only in the field of oral cavity, but also in industry. It is very important to use it. As a modern metal, it has excellent performance.