The hazards of nano veneer dental beauty are as follows: First, nano veneer is actually a nano resin-based material, as long as the resin has the phenomenon of aging, its use time is more than five years. Five years or so will appear color darkening, unattractive, but affect the overall visibility of the teeth. Second, nano veneers want to be bonded to the surface of the teeth, it is necessary to grind a certain amount of teeth, otherwise after the sticking of the more abrupt, less aesthetic, so there is a certain harm to the teeth. Third, nano veneers because the surface smoothness is not as smooth as porcelain veneers, so it is easy to have food debris retained in the surface of the nano veneer, resulting in micro-leakage of the edge of the veneer and affect the health of the base teeth.