The difference between metal and all-porcelain crowns, the details are as follows: 1, all-porcelain crowns first of all have relatively excellent aesthetic properties, because the optical properties of all-porcelain materials are closer to natural teeth, so they can realistically reproduce the color and translucency of natural teeth; 2, all-porcelain crowns have good biocompatibility; 3, all-porcelain crowns without the presence of metal materials, there will be no metal gingival edge gray staining phenomenon, there will be no metallic odor, the There will be no metal allergy and other phenomena; 4, the chemical properties of ceramic materials are very stable, so there will be no denaturation, dissolution, corrosion, etc. in such a complex environment in the oral cavity; 5, all-porcelain crowns for imaging, such as magnetic resonance imaging will not have an impact, while metal porcelain crowns because of the presence of metal materials, there will be gray staining of the gingival margin, metal allergies, especially base metals, and some Patients will feel the presence of metal odor; 6, for some imaging examinations, such as magnetic resonance imaging, metal porcelain crowns will produce artifacts that affect the results, especially base metal, for magnetic imaging will have a greater impact.