There are three solutions to yellow teeth. You can compare:
1, toothpaste can be attached to the tooth surface to achieve the desired effect quickly.
2. Cold light whitening has no side effects, and the treatment time is about 30 minutes, which generally lasts for more than 2 years.
3, porcelain teeth need to wear their own teeth, the color of porcelain teeth will be chosen according to their own preferences.
I hope my answer can help you.