Porcelain veneers are a restoration method that applies bonding materials to fix thin layers of artificial porcelain restorations to the labial surface of the affected teeth to cover aesthetic defects such as chipping and discoloration. Because the amount of porcelain veneer preparation is very small, limited to the enamel layer, so it is more conducive to the protection of the pulp, compared to all-ceramic crowns, porcelain fused to metal crowns and other restorative methods, porcelain veneers have obvious advantages. Because porcelain veneers are better than direct or indirect resin veneers in terms of aesthetic effect, resistance to wear, color stability, edge fit and gingival irritation, making it one of the most popular restorative methods in the aesthetic restoration of teeth. 1, repair discolored teeth tooth discoloration available porcelain veneer repair, such as fluorosis. The veneers can be used to repair discolored teeth, such as fluorosis, tetracycline, old discolored teeth and dead pulp discolored teeth. Experience shows that porcelain veneers have the best effect in repairing fluorosis. Because the discoloration of fluorosis mainly occurs in the surface layer of the enamel, when the completion of the porcelain veneer dental preparation, the exposed tooth color, the most ideal degree of improvement through porcelain veneers. 2, repair light and moderate enamel defects enamel hypoplasia of the front teeth often accompanied by different degrees of dental defects and color abnormalities. With porcelain veneers is easier to cover this defect. 3, repair the gap between the front teeth available porcelain veneers to close the gap between the front teeth. 4, repair mildly misaligned, ectopic and developmental malocclusion misalignment, ectopic and malocclusion.