Original Title: Application of Medical Titanium Alloys in Medical Field Application of Medical Titanium Alloys in Medical Field The appearance of titanium metal has silver-gray luster. As a new type of alloy and a carrier material, biomedical titanium alloy has been widely used in limb implants, alternative functional materials, dentistry, medical devices and other related fields. Titanium and titanium alloys have the characteristics of good corrosion resistance, high specific strength, low elastic modulus, fatigue resistance and good biocompatibility. Compared with other metals, it has unique advantages due to its good biocompatibility, so it is widely favored in the medical field. However, due to its low wear resistance and process performance, efforts are being made to further improve it. With the rapid development of the national economy, the demand of biomedical titanium alloys is increasing in the medical field because of its excellent performance. As metal materials with excellent biological properties, titanium and its alloys have good application prospects in the field of medicine. However, compared with developed countries, there are still some gaps in the research and application of titanium alloy materials in China, such as high elastic modulus, poor surface activity, poor wear resistance and corrosion resistance of titanium alloys, which will directly affect the biocompatibility of materials. Therefore, in order to develop new titanium alloys with better comprehensive properties, China should strengthen the research and development of materials, pay attention to innovation, and develop biomedical titanium alloys with low elastic modulus, high wear resistance, corrosion resistance and excellent biocompatibility. Titanium has good affinity with human connective tissue and skeletal epithelial tissue, and its excellent mechanical properties also reflect its advantages in medical alloys. Titanium is widely used as denture (dental implant) because of its low density, light weight, good corrosion resistance and comfortable wearing. In addition, after surface treatment, the aesthetic performance of titanium denture is increased, which can meet the needs of the public for beauty and give people visual enjoyment. 01. Direction for medical devices Medical titanium alloy medical instruments are the third generation of surgical instruments after carbon steel and stainless steel. In order to improve the anti-rust performance of stainless steel instruments, they are often subjected to surface treatment such as chromium plating and electropolishing. However, chromium is toxic, and the falling chromium layer will have a certain impact on the human body. Expand the full text The advantages of medical titanium alloy as medical devices are as follows: 1, the instrument is light and handy, the damage to blood vessels, muscles and organs can be reduced during the operation, the fatigue of doctors can be reduced, and the medical titanium instrument is more suitable for fine microsurgery; 2, that corrosion resistance is good and non-toxic, the equipment doe not rust, the wound is not easy to infect, and the wound heals quickly; 3, the elasticity of the medical titanium alloy is moderate, and the medical titanium alloy is suitable for being used as instruments such as forceps, forceps, microscalpels and the like; 4. When operating under the shadowless lamp, the reflective performance of medical titanium is weaker, and it is more suitable than stainless steel; Medical titanium medical instruments mainly include: scalpel, surgical forceps, surgical forceps, thoracic expander, suture needle, suture line, etc. Compared with other materials (such as stainless steel wire), medical titanium wire used as surgical suture has the advantages of small tissue reaction and good torsion resistance. After suturing, ti6al4v , the surgical wound is not easily inflamed and the bone suture site is not easily displaced. Medical titanium wire (TA1 or TA2 wire) with a diameter of 0.5-0.8 mm is generally used as the suture. In addition, the soft elasticity produced by the titanium-nickel alloy wire can promote the rapid healing of the wound. In addition, medical titanium alloy is also an important material for auxiliary rehabilitation equipment, such as wheelchairs, crutches, splints, medical instruments and so on. 02. Widely used in artificial joint materials According to the relevant literature, there are about 100 million patients suffering from knee and arm joint inflammation in the world every year, so it is imperative to carry out replacement surgery, so titanium alloy with excellent replacement function brings good news. Compared with ceramics, stainless steel and other materials, the elastic modulus of titanium alloy is closer to human skeleton, and it has more advantages in modulus. Therefore, titanium alloy is widely used in the correction of ankle and elbow joints. In addition, porous titanium alloy material can make the prosthesis have bioactivity and contribute to the healing of the femoral head; the surface of titanium alloy has good biocompatibility and can induce the growth of bone cells, so it is highly praised by clinicians and orthopaedic experts. The main advantages of titanium and titanium alloy as implant prosthesis are: ① high strength, good chemical stability and biocompatibility; ② non-toxic, no harm to human body; ③ low elastic modulus, better matching with human skeleton; ④ elastic capacity and shape recovery function of memory alloy. To sum up, the application of titanium in skull repair is mainly reflected in the following aspects: the use of titanium mesh can repair the defective skull. Its application in human cardiovascular system includes the preparation of artificial heart valve, blood filter, cardiac pacemaker and artificial heart pump, etc. It should be noted that titanium is not suitable for all artificial joint parts. In the joint parts, the parts that often swing are not suitable because titanium is easy to wear (ceramics and cobalt alloys should be used), while titanium alloys should be used for implant parts. In order to enable the titanium alloy to be combined with the biological bone at an early time, the surface of the titanium alloy is subjected to unevenness, and a bone sensor such as Apatite and bioglass is coated. Titanium is of great help to the development of dentistry Metals used in dental surgery began with amalgam and metal crowns in the 1920s. Gold, silver and palladium alloys were mainly used in the 1960s. After the 1970s, stainless steel became the most commonly used material for permanent and removable orthodontic instruments. Titanium casting technology was popularized and applied in the 1990s. Dental titanium precision casting machine has the characteristics of high dimensional accuracy, no bubbles and shrinkage cavities. Among the metal materials used for human hard tissue repair, the elastic modulus of titanium is the closest to that of human tissue, which can reduce the mechanical inadaptability between metal implants and bone tissue. The thermal conductivity of titanium is the lowest among all the metal materials used for dental restoration. The low thermal conductivity can reduce the thermal stimulation to the pulp of teeth with crowns, which is very important for dental restoration. Titanium inlays and crowns have the function of protecting dental pulp and avoiding cold and hot stimulation. Dental titanium is mostly pure titanium, but it has the characteristics of insufficient strength, difficult grinding, poor wear resistance, easy to produce casting defects and unstable quality. Titanium alloy has high strength, the most commonly used is Ti-6Al-4V alloy, but because metal V is harmful to human body, Nb is used instead of V, and Ti-6Al-7Nb alloy is successfully developed. It has excellent corrosion resistance, and is basically harmless to human body. It also has other advantages such as strong plasticity and excellent abrasiveness, and has been approved by ASTM standard. At present, superelastic Ti-Ni alloy is widely used in tooth straightening. Since the eighties of the 20th century, developed countries have begun to study the application of titanium in oral restoration, first used in dental implants, and then used in denture brackets, crowns and bridges and orthodontic wires. At present, titanium can be used as crowns, crowns, fixed bridges, porcelain bridges, bonded bridges, denture clasps, bases, connecting devices and reinforcing devices. Almost all metal parts of dentures can be made of titanium. The research of titanium and titanium alloys has become a hot spot in the research of dental alloys. Titanium alloy porcelain teeth can restore the shape and function of teeth very well, and have high strength, beautiful appearance, stable color, smooth surface,titanium tubing price, wear resistance and corrosion resistance. It is a permanent restoration, suitable for all fixed teeth, especially for people who are sensitive to nickel ions because of its good biocompatibility. It has been widely used in dental restoration. Return to Sohu to see more Responsible Editor:. yunchtitanium.com