There are many dental crown materials on the market today, but the better one is all-porcelain material. Now do dental crowns, materials are mainly metal materials, metal porcelain materials and all-porcelain materials, all-porcelain materials have metal materials and metal porcelain materials do not have many advantages. Specifically as follows: 1, beautiful, especially to do the front teeth, there is no metal staining, metal corrosion, and will not lead to gum discoloration; 2, now the strength of all-porcelain materials can also fully meet clinical needs; 3, all-porcelain materials do not contain metal, but also no magnetic, in the time of nuclear magnetic examination will not have an impact. Therefore, for middle-aged and elderly patients, especially those who want to do head MRI in the future, the choice of all-porcelain materials have great advantages, do not need to remove the dentures before the MRI. In addition, all-ceramic materials in the oral cavity does not exist corrosion, allergies and other problems, so for patients with allergies, the choice to do all-ceramic materials have a great safety. Therefore, the best material for full crowns is all-porcelain material.