It is not recommended to brush teeth with toothpaste and salt together. Salt brushing only acts as a rubbing agent and can only partially remove soft tartar and plaque from the tooth surface, while toothpaste already has enough rubbing agent and fluoride ions in it to clean the tooth surface and prevent decay at the same time, so brushing with salt and toothpaste together is totally unnecessary. In addition, brushing teeth with salt will cause the body’s intake of sodium ions, which is not good for health. If there is inflammation in the mouth, such as gingivitis, mouth ulcer, wisdom tooth pericoronitis, etc., you can use physiological saline or light salt water to rinse your mouth to reduce inflammation, but you also need professional dentist to treat different dental disorders to solve the problem at root. If your teeth are yellow and dark, brushing with salt will not have a whitening effect. You need to go to the hospital for ultrasonic cleaning or cold light whitening to make the surface of the teeth clean and the shade of the teeth improved.