Cold light whitening is bleaching with chemical reagents, advantages: cheap, disadvantages: short effect, and it will recover in a month or two. Today's stars don't take the time to do this. There are two kinds of long-lasting products, one is beauty crown and the other is porcelain veneer. The beauty crown is quite plastic, but it is very painful to grind off a lot of teeth.

Porcelain veneer is a popular method of tooth cosmetic restoration in recent years, which can whiten teeth and repair defects. Recently, it has developed into a kind of porcelain veneer without grinding teeth, among which Glamsmile porcelain veneer studied by Dr. Evelyne of Belgium is a representative. Because GS all-ceramic is used as the material, 3D design and numerical control production, and the whole process adopts precision design and precision processing, so the teeth can be restored without grinding.

This technology has begun to take shape as early as 1928 in Hollywood. Pincus, a famous American dentist, made a pioneering "Hollywood veneer" to solve the problem of celebrities appearing on the camera. At present, the veneer technology is getting better and better. It became popular in China only after 2008.

There are also great differences in porcelain veneer technology between different institutions, including veneer materials, veneer thickness, grinding teeth,

The time required for installation is very different from the effect after installation, so it is particularly important to choose a formal and professional brand in the field of dental veneer.

Extended data:

Medical whitening method

There are essentially only two methods for tooth whitening, one is chemical bleaching, and the other is covering whitening. There are also methods of tooth washing, tooth washing and sandblasting to restore the original color of teeth.

The main chemical component of tooth whitening medicine is urea peroxide, which reacts with teeth in different ways to discolor teeth. There are mainly cold light whitening, denture whitening, toothpaste whitening, mouthwash whitening, drug whitening, ultrasonic tooth cleaning and so on.

References:

Baidu encyclopedia-tooth whitening