All-ceramic veneers are thin layers of all-ceramic restorations bonded to the surface of the affected teeth through a strictly non-polluting resin bonding technique (mainly enamel bonding) to restore the normal shape or improve the color of the teeth without grinding or minimal grinding. The characteristics of this technology: 1, minimally invasive dental tissue grinding and cutting small; 2 aesthetic fluorescence, opalescence and translucency and other optical properties similar to natural teeth; 3 biocompatibility is good for maintaining the health of periodontal and pulp. It is mainly suitable for adolescent patients with anterior teeth damaged after trauma; patients with yellow and black anterior teeth that are ineffective after treatment by other treatments and seriously affect the aesthetics; patients with cosmetic restoration of anterior teeth who are afraid of pain and require less tooth grinding; patients with scattered gaps in anterior teeth or patients with black triangular gaps in elongated anterior teeth. For traumatic reasons caused by live pulp tooth loss patients are particularly suitable for the production of porcelain veneers, the tooth surface has a small depression in the discolored teeth, can replace the effect of making people excited. The combination with teeth whitening makes the clinical effect twice as effective and complements each other.