All-ceramic technology is a new restoration technology introduced in the 1980s, the entire restoration are cast or cut from ceramic materials. All-ceramic restorations and porcelain restorations compared to the following significant advantages: 1, good light performance, making the aesthetic effect of the restoration more realistic. 2, no metal base crown, does not affect the MRI (MRI) and CT examination results of the head and neck. 3, the use of resin bonding agent bonding restorations, so that the restoration edge more closely fit. The clinical indications for all-ceramic technology are more stringent and are suitable for the restoration of anterior veneers, inlays, single crowns and anterior three-unit fixed bridges, which are increasingly becoming the first choice for fixed restorations of anterior teeth for patients in developed countries.