Hello, then the metal post is usually cobalt-chromium alloy or pure titanium. Generally, these two alloys have good biocompatibility and are harmless to human body. If they are harmful to oral health, it is impossible to use them in clinic for so many years. Your current situation is that the porcelain tooth has dropped, so you can do it again. It also depends on whether your teeth are caused by the fracture of metal posts and whether the roots are broken. Then your teeth can restore their beauty and chewing function after they are finished. It is generally recommended to choose a regular professional dental hospital to make porcelain teeth, which can not only ensure the technology and effect, but also ensure the long-term use effect. At present, porcelain teeth are all made of digital positioning, and computer scanning positioning.