Tooth washing: the price is about 100 yuan, but the whitening effect is not good. Many women who love beauty feel a little white after washing their teeth, but before long, the teeth in the mirror are still heartbreaking yellow.
Cold light whitening: the price is relatively expensive, generally around three or four thousand, and the short-term whitening effect is good. The main ingredient used is hydrogen peroxide. Some people will feel weak teeth after finishing, but these conditions will usually be obviously relieved after 48 hours, but the cost is expensive.
Porcelain teeth: The whitening effect of porcelain teeth is very remarkable, but it will cause irreversible damage to teeth. To put it bluntly, you should at least wipe off your teeth 1/2, and then put on an artificial crown. It is not worth the loss to pay such an expensive price for whitening. It is expensive and requires regular care in the later period.
Folk folk remedies: the cost is zero, but it is unscientific. Many people not only do not whiten their teeth well after using it, but also bring a series of tooth problems, such as dentin allergy, bleeding and soreness, so it is not recommended to take it. Examples of folk remedies are vinegar whitening, yeast powder egg white whitening, cuttlefish bone whitening and so on.