Porcelain metal teeth are beneficial for dental restoration. But at the same time, there will also be some effects, such as black gums, gum inflammation, have an impact on MRI examination. 1. Black gums: metal porcelain teeth are affected by metal ions, which will increase the chance of gingival staining, due to the deposition of metal ions in the gums, resulting in the phenomenon of black gums. 2. Inflammation of the gums: metal porcelain teeth patients may also have the phenomenon of inflammation of the gums, due to the metal layer of nickel ions contained in the unstable, but also has a sensitizing properties, easy to free into the gums, thereby stimulating the gums red and swollen as well as pain, resulting in inflammation of the gums phenomenon. 3. Impact on magnetic resonance examination: Because of the paramagnetic nature of ordinary metal, there will be interference in the magnetic resonance examination, which will affect the results. It is recommended that patients who need to make porcelain teeth go to regular hospitals for production, which can reduce the occurrence of adverse phenomena, and patients with abnormal phenomena should go to the hospital for examination in a timely manner, and according to the specific circumstances of the corresponding treatment, so as not to delay the condition.