Hello! Cold light whitening technology can be used, which can not only remove the pigment deposition on the surface of teeth, but also enter the deep layer of teeth to achieve the effect of decoloration. According to clinical experiments, beyond cold light tooth whitening technology can improve the effect by 5- 14 vita level, and the operation process only takes 30 minutes, with no side effects, and the whitening effect can last for more than two years. Everyone's effect will depend on the color of their original teeth and personal situation, and eventually you will have bright white teeth.