Back teeth generally refers to the teeth after the first permanent molar, according to the shape of the teeth and occlusion to choose all-ceramic teeth or porcelain teeth, both have their own advantages and disadvantages, good and bad can not be generalized. 1. All-ceramic teeth: all-ceramic teeth, also known as all-ceramic crowns, covering the surface of all the crowns, is a pure porcelain teeth without metal crowns, there is no metal limitations, similar to real teeth, the level and color of the teeth can be maximized to reflect. Therefore, all-ceramic crowns have the best aesthetic effect, and there is no stimulation to the human body, shooting MRI and CT without significant impact, the disadvantage is the complexity of the production, the cost is higher. 2. Porcelain teeth: Porcelain teeth are coated with porcelain on the surface of the crown or bridge bracket of high temperature porcelain alloy, forming a metal-porcelain composite structure of the restoration. It has the advantages of high strength and wear resistance of metal. For the heavier bite force can choose porcelain teeth to prevent the phenomenon of fracture. Disadvantages are poor compatibility with tissues, irritation, allergies and gum discoloration can occur, in the CT and MRI will have a certain effect. Depending on the condition of your teeth and your financial situation, it is recommended that you choose porcelain or all-porcelain teeth under the guidance of your doctor.