1, missing teeth, and missing less, the adjacent teeth are healthy, no inflammation or although there is but after treatment has been controlled, after the doctor’s examination can be porcelain restoration; 2, the color or shape of the teeth is not good, such as tetracycline teeth, conical teeth can be porcelain restoration; 3, the alignment of the teeth is not suitable for orthodontic treatment patients, can be considered for porcelain restoration; 4, due to traumatic fracture of the teeth or residual roots, such as If the root has sufficient length and the periodontal situation is good, after perfect root canal treatment, porcelain tooth restoration can be done; 5, due to dental caries and other reasons, tooth loss is large, tooth discoloration, can restore the beauty and function through porcelain teeth.