The persons who have stained teeth look older. To make the white teeth,
dentists used to grind the teeth and restore with white artificial teeth.
This treatment cost to patients and is not good to teeth because of the
damages. Nowaday, tooth whitening is commonly applied to patients since
it can avoid grinding teeth and demonstrates good cost performance. The
tooth whitening needs to be applied once per two or three months to keep
the teeth white.
Before whitening After whitening
* No grinding of teeth
* No damage to teeth
* Easy control of color and brightness
* Short treatment time
* Good cost performance
* Not last long (less than a half year)
* Can't whiten the artificial teeth
* May affect to tooth sensitivity