All-porcelain teeth are clinically known as all-porcelain crowns, and porcelain teeth, that is, metal porcelain crowns, both used in dental restorations, in terms of material, performance, side effects, etc. have certain differences. In addition to the higher price, all-porcelain crowns have more advantages over metal porcelain crowns, and are the more recommended dental restoration material in the clinic. If the patient’s economic conditions are limited, you can also choose metal porcelain crowns, can also play a restorative role. 1, material: common metal porcelain crown materials include nickel-chromium alloy, titanium alloy, pure titanium, cobalt-chromium alloy, etc.. The material of the porcelain crown mainly includes glass-based all-porcelain, alumina-based all-porcelain, zirconia-based all-porcelain, better material, and color, luster, hardness, density and transparency closer to the human body’s natural teeth; 2, performance: metal porcelain crown compared to dentures and other restorative methods, with wear resistance, mechanical higher advantages, help ensure that the restoration is stable, but with poor light transmission, low aesthetics and other defects. In addition to wear resistance and mechanical properties, all-ceramic crowns have the advantages of stable color, low thermal conductivity, non-conductivity, wear resistance and biocompatibility. In addition, because the metal porcelain crowns contain metal, so in the MRI examination will interfere with the signal, while the applied magnetic field will also affect the metal porcelain crowns, a certain movement, may damage the local blood vessels or nerves. And porcelain crowns do not contain metal, no impact on the MRI examination, more convenient for the examination; 3, side effects: due to metal materials and the human body’s own tissue incompatibility, therefore, if the metal porcelain crowns can be long-term presence of gums and periodontal tissue, etc. caused by certain effects, easier to induce periodontal and gum inflammation. Very few patients may also appear to metal porcelain crowns allergic situation. All-porcelain crowns are generally not irritating to the gums and have less impact on the gums and surrounding tissues, helping to reduce the possibility of tooth sensitivity and reduce the incidence of oxidation of gum tissue and other phenomena.