Bioceramic materials can be divided into bioinert ceramics and bioactive ceramics, and the main material components of bioinert ceramics are alumina and zirconia, so alumina ceramics are also a kind of bioceramics. Let's talk about alumina bioceramics?

Alumina Bioceramics

The single crystal alumina has a relatively high flexural strength in the C-axis direction, good wear resistance, good heat resistance, and can be directly fixed to the bone. Has been used as artificial bone, tooth root, joint, bolt. In addition, the bolt does not rust, nor does it dissolve harmful ions. Unlike metal bolts, it does not need to be taken out of the body. Because alumina ceramics are implanted into the human body, a very thin fibrous membrane is formed on the surface, and there is no chemical reaction at the interface. The single crystal alumina produced by the flame melting method has high strength and good wear resistance, and can be finely processed to make artificial tooth roots, fracture fixators, etc. Polycrystalline alumina, or corundum, is strong and used to make artificial hip joints, artificial bones, artificial tooth roots and joints. The mechanical properties of single crystal alumina ceramics are better than those of polycrystalline alumina, and they are suitable for parts with heavy load and high wear resistance requirements, but the disadvantage is that it is difficult to process. Chinese ceramics can fully meet the ISO standard in laboratory research, but there is still a certain gap in clinical use, and the materials do not meet the ISO standard.

Single crystal alumina ceramics can also be used as artificial joint handles, which have higher mechanical strength than alumina polycrystalline ceramics and are not easy to break. It can also be used as a fixation material for damaged bones, and is mainly used to make artificial bone screws, which are stronger than artificial bone screws made of metal materials. It can be processed into various tooth roots with small size and high strength. Because alumina single crystal has good affinity with human protein and strong binding force, it is conducive to the adhesion of gingival mucosa and heterodental materials.