If the water you drink for a long time is alkaline or has a lot of impurities, it will have an effect on the color of your teeth. The yellowing of the teeth is mainly a matter of lifestyle, whether or not you insist on cleaning your teeth every morning and evening.
The main reasons for the yellowing and blackening of the teeth are several:
1, health factors: teeth in the development process due to poor nutrition or disease, will make the teeth calcification is affected, the teeth will be yellow and brittle;
2, the water quality factors: some areas, especially some mountainous areas, due to the high fluoride content in the water, too much fluoride drinking teeth will be yellow and not 1 ~ 2 teeth, is a mouth full of big teeth. 2 teeth, is full of yellow teeth. Fluorine has a role in preventing caries, so these people are not easy to caries (tooth decay);
3, drug factors: most people now know that tetracycline drugs can lead to the occurrence of yellow teeth, especially in children (before the age of 5 years old) to take the impact of a greater.