Baking soda, scientific name sodium bicarbonate, dissolved in water is slightly alkaline, pH about 8 ? In life, it is often used as a bulking agent in the food production process, and some people use it to scrub stainless steel pots, copper or iron pots and hot water bottles of dirt. ? Baking soda does not affect your gums or mouth when brushing your teeth. ? Because baking soda dissolves quickly in water, when people finish eating, the oral environment is mostly acidic. When baking soda meets acid, it forms carbonic acid (carbon dioxide + water) and sodium ions, all of which are harmless to the mouth.

Baking soda destroys the living environment of plaque. The plaque living environment has a pH of about 6, which is weakly acidic. Baking soda is weakly alkaline when dissolved in water. Brushing with it can destroy the living environment of plaque, control the growth of plaque, and achieve the effect of whitening. ? This is different from the principle of using baking soda to remove dirt. Baking soda removes oil and dirt quickly because it increases the surface tension of the water, making it easier to lather. It's an oil-in-water process with no chemical reaction. ?

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There are three main causes of tooth color changes:endogenous, exogenous and aging. ? As the name suggests, exogenous refers to changes in tooth color caused by external factors. ? Common factors include: smoking, drinking alcohol (especially red wine), drinking tea, coffee, carbonated beverages and so on. It is easy to deposit tobacco stains, tea stains, calculus and other plaque on the teeth, which leads to changes in the appearance and color of the teeth ? , in addition, regular consumption of herbal medicines can also change the color of teeth , ? Endogenous refers to the changes that occur in the teeth during development due to various reasons. ? If you take too many tetracyclines and have too much fluoride in your drinking water. ? These two types of teeth are clinically known as "tetracycline" and "dental fluorosis" ? Aging is the gradual wearing away of dentin and the development of restorative dentin as we age.

It is recommended that you brush your teeth carefully throughout your life,? Brushing your teeth can do some cleaning. Those who like to smoke and often drink strong tea and coffee should pay special attention to the fact that no matter how busy they are, they never forget to brush their teeth before going to bed. Eat more celery, corn and other coarse grains,? Roughage is rich in dietary fiber and the chewing process is equivalent to brushing your teeth. ? Oral checkups and dental cleanings should be done every six months or once a year. It is difficult to remove food debris between the teeth by brushing every day, and food debris that is not cleaned up in time will lead to plaque retention, and the teeth will slowly turn yellow and be prone to cavities. ?