Brushing teeth with baking soda is harmful to teeth, because the composition of baking soda is sodium bicarbonate, which is a weak alkaline substance, long-term use of sodium bicarbonate to brush teeth, will cause corrosion of tooth enamel, in addition to long-term intake of alkaline substances, but also disrupt the acid-base balance in the oral cavity, the large intake of alkaline substances, is also not conducive to physical health. Many people think that the use of baking soda to brush teeth, is to have the effect of whitening teeth, in fact, this is a wrong point of view, baking soda in the brushing of teeth, can only play the role of friction agent, can partially remove the teeth on the surface of the soft scales and food residues, but baking soda is not able to replace toothpaste to brush teeth. If there are pigmentation and tartar on the surface of the teeth, resulting in unattractive teeth, you need to go to the hospital for ultrasonic scaling treatment also known as scaling to make your teeth clean and clear.