If you brush your teeth regularly every day, you will find that your teeth are still yellow. This problem may have been bothering many people. Why do you insist on brushing your teeth every day? Let me tell you the answer~
1. Food
In our daily diet, we inevitably eat colored food. In addition to tofu, eggs and other light color food, the vast majority of other colorful, colorful food, are the cause of yellow teeth. There are many kinds of bacteria on the surface of teeth, which secrete many viscous substances on the surface of teeth.
Tobacco (smoking or chewing tobacco), tea, coffee, coke, red wine, colored food and so on will leave pigment on our teeth. These pigments adsorb on these sticky substances, gradually making the surface of teeth yellow or black.
Over time, these substances will gradually penetrate into the interior of the teeth from the surface of the teeth, forming internal stains, so that the interior of the teeth will gradually change color. This kind of teeth is called exogenous stained teeth. In other words, as long as teeth have 'intimate contact' with color in life, they all have the possibility of being dyed yellow!
2. Drugs and water quality
During the development of teeth, especially children under 8 years old, taking tetracycline drugs is easy to cause tooth discoloration to tetracycline teeth. In some areas, especially in some mountainous areas, due to the high fluoride content in the water, excessive drinking of fluoride will make the teeth yellow, and not 1-2 teeth, but full of rhubarb teeth, become dental fluorosis.
These stained teeth are called endogenous stained teeth. These 'sick' teeth, with dark pigment embedded in the deep layer of teeth, can not be touched by daily brushing. Only through special whitening methods can the teeth be 'reborn'.
3. Hygienic habits
Some people don't pay attention to oral hygiene and don't have the habit of brushing their teeth correctly in the morning and evening, causing a layer of food residue, soft dirt, dental calculus, cigarette stains, tea stains and other 'bad marks' on the surface of their teeth. These yellow teeth are not caused by yellowing of teeth themselves, but by neglecting oral hygiene.
4. Age related yellow teeth
What we can never resist is natural aging. As we grow older, our teeth are hard to withstand the vicissitudes of life, and the color is gradually dim and yellow. Years leave wrinkles on the skin, but also make the teeth no longer as white as ever.