1, color realistic, close to natural teeth: all-ceramic crowns made of all-ceramic, completely without metal base, its level, color is closest to the real teeth, no irritation to the gums, the reflection of light closer to natural teeth, its excellent optical properties, excellent biocompatibility, realistic color has made it the first choice of beauty lovers in recent decades. 2, natural beauty, crystal clear: can provide beautiful natural, active restorative effect, its moderate perspective, better edge fit, and the refractive nature of the enamel approximation is unmatched by other porcelain. In recent years, all-porcelain crown restoration has become the new fashion of modern dental restoration, which is suitable for patients with receding gums, green gums, red gums, poor color and chipped porcelain after the installation of fixed dentures. 3, good biocompatibility, no metal allergic reaction: many people, especially women, have allergic reactions to the metal in metal porcelain crowns, so many patients prefer to choose all-porcelain crown restoration for this consideration.