Brushing teeth is not white, the reason why it is white is because of the visual effect formed by brushing in addition to tartar, pigmentation, etc. on the surface of the teeth. Baking soda brushing is to take advantage of this cleaning effect, and make the teeth white.

There have been some posts published similar whitening methods, soda and salt water may have a role, but it will not be the kind of effect is very obvious, because the use of soda to remove the surface of the teeth of the pigmentation of the accumulated deposits. /If the teeth themselves are yellow, it won't work. Now there is a medical method can be used salt \ baking soda equal amount, add to make toothpaste-like, brush your teeth once a day, 3-4 days can be removed from the surface of the teeth of all the discoloration, so that the teeth white.

But baking soda itself is an alkaline substance, because if you use alkaline things to brush your teeth for a long time, it is also a corrosive effect on the teeth themselves, so it is recommended that you do not want to use it for a long time, on the oral cavity, the teeth will be damaged.