It is recommended to use zirconia all-ceramic crowns, cobalt chromium alloy porcelain crowns and all-ceramic crowns. 1. Zirconia all-ceramic crowns: the inner and outer layers are zirconia ceramic material, which is a kind of strength and hardness, better than the metal material, the back teeth to use up no pressure, no effect on the nuclear magnetism, will not stimulate sensitivity, and the chances of taut porcelain is even smaller. 2. Cobalt chromium alloy porcelain dental crowns: cobalt chromium alloy dental crowns can be physical properties, due to the absence of nickel, biocompatibility is greatly improved, resulting in gum discoloration of the chances are greatly reduced, and the price is suitable for the masses of dental crowns. 3. All-ceramic dental crowns: all-ceramic crowns have a better transparency, color, form realistic, close to normal teeth, has a very good biocompatibility, will not bring to the oral environment, the most important thing is placed in the mouth around the gums will not have ugly black lines appear, good aesthetic effect. There are very many materials suitable for posterior large teeth crowns, the characteristics of each material are different, it is recommended to go to a regular dental hospital for reasonable treatment.