1 and tetracycline induced yellow teeth
Tooth yellowing is mostly caused by tetracycline, because the crown of deciduous teeth is in the calcification stage from the fourth month of fetus to birth 1 year. If pregnant women drink their children, taking tetracycline, oxytetracycline, chlortetracycline and other tetracycline drugs during this period will aggregate with calcium in developing teeth to form a fluorescent substance, which will turn the teeth brown. Similarly, if children take too many tetracycline drugs when they are 1-6 years old, their permanent teeth will turn yellow easily.
2. Local drinking water factors
In some places, the fluorine content of drinking water is too high (more than 1 mg per kilogram of water). If you drink it for a long time before the age of 6, yellow-brown plaques will appear on the front teeth and canine teeth.
3. Diet and life factors
Smoking, drinking, drinking tea and coffee for a long time. And the deposition of pigments such as rock tea will also make teeth yellow.
4, systemic disease factors
Some systemic diseases, malnutrition, dental caries, heredity and other factors can turn teeth into gray, brown, black, yellow and other colors, affecting the beauty of teeth.
5, whitening teeth door
Make toothpaste with the same amount of salt and soda and a little water, and brush your teeth 1-2 times a day. Long-term use can whiten yellow teeth. This method is convenient, simple, safe and effective, and is suitable for the yellow staining of teeth caused by long-term smoking, tea drinking and coffee drinking.
6, preventive measures
1. Drink water through a straw. John, a dentist in Half Moon Bay, California? c？ Munn said that drinking coffee, soda water, tea and other drinks through straws can minimize the contact between drinks and tooth surfaces, significantly reduce the chance of teeth being colored by drinks and make teeth whiten for a longer time.
2. Eat tooth whitening food after drinking red wine or coffee. Apple, for example, is slightly sour and astringent, and its coarse pulp rich in fiber makes it an ideal food for cleaning teeth. Chewing apples, celery, carrots and other foods carefully can clean teeth like a toothbrush and wipe away stubborn stains on teeth.
3. Self-made whitening toothpaste. Jennifer, a plastic surgeon in new york? Jabulo said: "Particles can remove stains and polish teeth, but they are not corrosive enough to damage enamel." Self-made whitening toothpaste can be made of baking powder and water. It can be used several times a month to remove the coloring on the tooth surface and make the teeth white.
4. Choose the right lipstick. New york makeup artist Jessica? Leigh bisky said, "Lipstick with a blue background will make teeth look white." In order to make it easier to distinguish, three or four lipsticks with different background colors can be identified side by side.
5. Reduce heartburn and acid reflux. Edmund, a consultant of the American Dental Association and a professor at the University of California School of Stomatology? Hugh Park Jung Su said that the acidic water in the digestive system will flow back into the mouth, just like the acid in soda water or sports drinks, which will corrode the enamel. Therefore, it is necessary to consult a professional doctor to control gastric acid reflux.