The application of metallic materials in the field of medicine, especially in human repair, has a long history and significant advantages. As early as the late 18th century, Fe, Au, Ag, Pt and other metals have been used in the human body to fix broken bones. Compared with other types of medical materials, such as polymers and ceramics, metal materials have unrivalled advantages: excellent strength, excellent toughness, and excellent processing properties, which have made them occupy a pivotal position in the biomaterials market. Currently, medical metal materials mainly include medical titanium, stainless steel materials and cobalt-based alloys. Titanium and titanium alloys not only have low modulus of elasticity, but also have good corrosion resistance and excellent biocompatibility, and thus are increasingly widely used in clinical treatment. Medical titanium alloys are mainly used in the production and manufacture of surgical implants and orthopaedic products, such as dental implants, artificial joints and vascular stents.
Bone and Joint Substitutes
Titanium and titanium alloy density, low modulus of elasticity, can avoid the phenomenon of local bone resorption, so it is very good artificial bone, joints and other hard tissue replacement materials. The acetabular cup and dice stem of the artificial hip joint prosthesis are usually made of titanium and titanium alloy, after the acetabulum is fixed, the joint head can move freely in the acetabular cup. Artificial knee joints are also often made of titanium and titanium alloys and consist of a tibial component, a femoral component and a patellar component. Bone and joint substitutes are subjected to torsional flexion, compression and muscle contraction forces in the human body, and therefore require high strength and toughness of the implant. Pure titanium can be used in parts of the body that are subjected to low forces, and Grade 5 titanium alloy can be used in parts of the body that are subjected to high forces. For more information about medical titanium bar, please contact us.
Cardiovascular Repair Materials
Examples of titanium and titanium alloys used in human cardiovascular applications include artificial heart valves, blood filters, pacemakers and artificial heart pumps. Its advantages are: 1, high strength, good chemical stability, excellent biocompatibility; 2, titanium has no magnetism, in the magnetic resonance spectroscopy MRI seldom produces false images; 3, NiTi memory alloy with the elasticity of the ability to shape the recovery function is very suitable for medical applications NiTi alloy is martensitic at low temperatures (near zero), it is easy to turn into easy to introduce into the body of the shape when the temperature increases to the body temperature will be the same as when the temperature increases to the body temperature, it is easy to turn into the shape of the body of the body of the body of the body of the body of the body of the body of the body of titanium and titanium alloy. When the temperature rises to body temperature, a reverse phase transition occurs, which returns the alloy to its original shape and generates a large restoring force for orthopaedic and supportive purposes. In recent years, NiTi shape memory alloys have attracted a lot of attention in the application of vascular stents.
Dental implants
Titanium and titanium alloys are widely used as dental restorative materials, its advantages include: ① titanium in the acidic and alkaline environment, the amount of dissolution is small, there is no silver alloy corrosion, discolouration problems; ② good safety for the human body, will not appear nickel alloys caused by hypersensitivity reactions; ③ pure titanium density is only 4.50 g / cm3, and the density of the natural teeth is close to the fabrication of the bed of the teeth is lightweight, the veneer good sense of mounting; ④ pure titanium thermal conductivity is low, the thermal conductivity of pure titanium is low, the thermal conductivity of pure titanium is low, the thermal conductivity of pure titanium is low. Pure titanium has low thermal conductivity and is not irritating to the dental pulp; ⑤ Compared with traditional dental materials, it has the property of not changing the taste of food when chewing. Therefore, titanium and titanium alloys are by far the most clinically effective dental materials, and pure titanium and Grade5 Ti 6Al4V titanium alloys are the main materials used in the field of dentistry.
