Why are teeth yellow?

When communicating with others, smiling and showing white teeth will make people feel more comfortable and give people a very good impression. If you smile and show yellow teeth at this time, it will often make people feel very uncomfortable, which will also have a negative impact on daily social interactions. There are many reasons for yellow teeth, such as mottled tooth enamel, which is mainly caused by excessive fluoride in water. It is also related to diet and not paying attention to oral hygiene.

Why are teeth yellow?

1. Food

In our daily diet, we inevitably eat colored foods. Except for light-colored foods such as tofu and eggs, most other colorful and colorful foods are the cause of yellow teeth. There are many kinds of bacteria on the surface of teeth, which secrete many sticky substances on the surface of teeth. The intake of tobacco (smoking or chewing tobacco), tea, coffee, cola, red wine, and colored foods will leave pigments on our teeth. These pigments are adsorbed on these sticky substances, gradually turning the tooth surface yellow or black. Over time, these substances will gradually penetrate from the surface of the teeth into the inside of the teeth, forming internal stains, which will slowly discolor the inside of the teeth. Such teeth are called exogenously stained teeth. In other words, as long as teeth have "close contact" with color in life, they are completely likely to be stained and turned yellow!

2. Drugs and water quality

When teeth are developing, especially in children under 8 years old, taking tetracycline drugs can easily cause tooth discoloration to become tetracycline teeth. In some areas, especially in some mountainous areas, due to the high fluoride content in the water, drinking too much fluoride will make the teeth yellow. And it is not just 1 to 2 teeth, but a whole mouth of yellow teeth, which is called fluorosis. These stained teeth are called intrinsically stained teeth. These "morbid" teeth have dark pigments buried deep in the teeth that cannot be reached by daily brushing. Only through special whitening methods can the teeth be "transformed".

3. Hygiene habits

Some people do not pay attention to oral hygiene and do not have the habit of brushing their teeth correctly in the morning and evening, which causes a layer of "bad marks" such as food residues, soft plaque, tartar, smoke stains, tea stains, etc. to accumulate on the surface of their teeth. These yellow teeth are not caused by the teeth themselves, but by not paying attention to oral hygiene.

4. Age-related yellow teeth

What we can never resist is natural aging. As we age, our teeth become dull and yellow in color. Time leaves wrinkles on the skin and also makes the teeth no longer as white as before.