The main component of microcrystalline porcelain is hydroxyapatite. People who care about injection beauty may know that it is the main component of bone powder that once swept China. At that time, the main function of bone powder was to inject rhinoplasty, but later it was found that hydroxyapatite was easy to cause some complications, and it was extremely troublesome to take it out and repair it, so the State Council issued a document banning the use of bone powder for rhinoplasty. Although the popular microcrystalline porcelain has a new name and identity, its essence is still banned bone powder.