Toothpaste and salt usually can not whiten teeth. 1. Toothpaste with salt is generally only able to remove the dirt on the surface of the teeth, so that the teeth to restore the clean, and can not play the effect of whitening teeth, and often use toothpaste with salt brushing may stimulate the teeth as well as the oral mucosa, resulting in pain and discomfort. 2. If the dental inflammation is yellow or black, want to whiten, it is recommended to actively to the regular hospital related departments, under the guidance of the doctor to use the appropriate whitening program, such as cold light whitening, if the teeth surface stones and tobacco stains caused by the more yellow and black teeth, you can consider scaling. It is recommended that you brush your teeth and rinse your mouth frequently to keep your mouth clean and hygienic, and also try to eat less food with deep pigmentation to help whiten your teeth.