The Application of Alumina Ceramics in Medicine

In medicine, alumina ceramics are more commonly used for manufacturing artificial bones, joints, and teeth. alumina ceramics have excellent biocompatibility, biological inertness, physicochemical stability, high hardness, and high wear resistance, making it an ideal material for preparing artificial bones and joints. But it has the same drawbacks as other ceramic materials, such as high brittleness, low fracture toughness, high difficulty in machining technology, and complex process, so further research and application are needed.

Hydroxyapatite has good biocompatibility and bioactivity, and its excellent bone conduction effect has been verified by many research results. It is currently the most promising ceramic artificial bone material. However, pure hydroxyapatite has poor mechanical properties and is difficult to be used as a substitute material for load-bearing bone. The alumina ceramic hydroxyapatite artificial bone material sintered using discharge plasma technology is expected to become an ideal load-bearing bone material by introducing dispersion strengthening phase Al2O3 to improve the mechanical properties of the material. This not only maintains the biological activity of hydroxyapatite but also improves the mechanical properties of the material.

alumina ceramic hydroxyapatite artificial bone material has a large number of applications in the field of human bone repair. In clinical orthopedic surgery, bone defects often require a large amount of repair materials. At present, common repair materials include self bone, allogeneic bone, and artificial synthetic materials. Although autologous bone transplantation has no immune rejection and good results, its material selection is limited; Allogeneic bone transplantation is prone to immune rejection and has poor repair effects; Artificial synthetic materials, which are basically biodegradable materials, cannot repair the defect area. Therefore, seeking biomaterials with good physicochemical and biological properties as bone transplant materials has become a research hotspot. alumina ceramic hydroxyapatite artificial bone material has solved these problems. It has stable physicochemical properties, and its hardness, bending strength, and fracture toughness are close to human bone. Moreover, conventional disinfection will not change its biological characteristics.